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Diffstat (limited to 'debian/missing-sources/dygraph-combined.js')
| -rw-r--r-- | debian/missing-sources/dygraph-combined.js | 11219 |
1 files changed, 11219 insertions, 0 deletions
diff --git a/debian/missing-sources/dygraph-combined.js b/debian/missing-sources/dygraph-combined.js new file mode 100644 index 000000000..5316fe49d --- /dev/null +++ b/debian/missing-sources/dygraph-combined.js @@ -0,0 +1,11219 @@ +/*! @license Copyright 2014 Dan Vanderkam (danvdk@gmail.com) MIT-licensed (http://opensource.org/licenses/MIT) */ +// Console-polyfill. MIT license. +// https://github.com/paulmillr/console-polyfill +// Make it safe to do console.log() always. +(function(con) { + 'use strict'; + var prop, method; + var empty = {}; + var dummy = function() {}; + var properties = 'memory'.split(','); + var methods = ('assert,clear,count,debug,dir,dirxml,error,exception,group,' + + 'groupCollapsed,groupEnd,info,log,markTimeline,profile,profiles,profileEnd,' + + 'show,table,time,timeEnd,timeline,timelineEnd,timeStamp,trace,warn').split(','); + while (prop = properties.pop()) con[prop] = con[prop] || empty; + while (method = methods.pop()) con[method] = con[method] || dummy; +})(this.console = this.console || {}); // Using `this` for web workers. +/** + * @license + * Copyright 2012 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +(function() { +'use strict'; + +/** + * @fileoverview Adds support for dashed lines to the HTML5 canvas. + * + * Usage: + * var ctx = canvas.getContext("2d"); + * ctx.installPattern([10, 5]) // draw 10 pixels, skip 5 pixels, repeat. + * ctx.beginPath(); + * ctx.moveTo(100, 100); // start the first line segment. + * ctx.lineTo(150, 200); + * ctx.lineTo(200, 100); + * ctx.moveTo(300, 150); // start a second, unconnected line + * ctx.lineTo(400, 250); + * ... + * ctx.stroke(); // draw the dashed line. + * ctx.uninstallPattern(); + * + * This is designed to leave the canvas untouched when it's not used. + * If you never install a pattern, or call uninstallPattern(), then the canvas + * will be exactly as it would have if you'd never used this library. The only + * difference from the standard canvas will be the "installPattern" method of + * the drawing context. + */ + +/** + * Change the stroking style of the canvas drawing context from a solid line to + * a pattern (e.g. dashes, dash-dot-dash, etc.) + * + * Once you've installed the pattern, you can draw with it by using the + * beginPath(), moveTo(), lineTo() and stroke() method calls. Note that some + * more advanced methods (e.g. quadraticCurveTo() and bezierCurveTo()) are not + * supported. See file overview for a working example. + * + * Side effects of calling this method include adding an "isPatternInstalled" + * property and "uninstallPattern" method to this particular canvas context. + * You must call uninstallPattern() before calling installPattern() again. + * + * @param {Array.<number>} pattern A description of the stroke pattern. Even + * indices indicate a draw and odd indices indicate a gap (in pixels). The + * array should have a even length as any odd lengthed array could be expressed + * as a smaller even length array. + */ +CanvasRenderingContext2D.prototype.installPattern = function(pattern) { + if (typeof(this.isPatternInstalled) !== 'undefined') { + throw "Must un-install old line pattern before installing a new one."; + } + this.isPatternInstalled = true; + + var dashedLineToHistory = [0, 0]; + + // list of connected line segements: + // [ [x1, y1], ..., [xn, yn] ], [ [x1, y1], ..., [xn, yn] ] + var segments = []; + + // Stash away copies of the unmodified line-drawing functions. + var realBeginPath = this.beginPath; + var realLineTo = this.lineTo; + var realMoveTo = this.moveTo; + var realStroke = this.stroke; + + /** @type {function()|undefined} */ + this.uninstallPattern = function() { + this.beginPath = realBeginPath; + this.lineTo = realLineTo; + this.moveTo = realMoveTo; + this.stroke = realStroke; + this.uninstallPattern = undefined; + this.isPatternInstalled = undefined; + }; + + // Keep our own copies of the line segments as they're drawn. + this.beginPath = function() { + segments = []; + realBeginPath.call(this); + }; + this.moveTo = function(x, y) { + segments.push([[x, y]]); + realMoveTo.call(this, x, y); + }; + this.lineTo = function(x, y) { + var last = segments[segments.length - 1]; + last.push([x, y]); + }; + + this.stroke = function() { + if (segments.length === 0) { + // Maybe the user is drawing something other than a line. + // TODO(danvk): test this case. + realStroke.call(this); + return; + } + + for (var i = 0; i < segments.length; i++) { + var seg = segments[i]; + var x1 = seg[0][0], y1 = seg[0][1]; + for (var j = 1; j < seg.length; j++) { + // Draw a dashed line from (x1, y1) - (x2, y2) + var x2 = seg[j][0], y2 = seg[j][1]; + this.save(); + + // Calculate transformation parameters + var dx = (x2-x1); + var dy = (y2-y1); + var len = Math.sqrt(dx*dx + dy*dy); + var rot = Math.atan2(dy, dx); + + // Set transformation + this.translate(x1, y1); + realMoveTo.call(this, 0, 0); + this.rotate(rot); + + // Set last pattern index we used for this pattern. + var patternIndex = dashedLineToHistory[0]; + var x = 0; + while (len > x) { + // Get the length of the pattern segment we are dealing with. + var segment = pattern[patternIndex]; + // If our last draw didn't complete the pattern segment all the way + // we will try to finish it. Otherwise we will try to do the whole + // segment. + if (dashedLineToHistory[1]) { + x += dashedLineToHistory[1]; + } else { + x += segment; + } + + if (x > len) { + // We were unable to complete this pattern index all the way, keep + // where we are the history so our next draw continues where we + // left off in the pattern. + dashedLineToHistory = [patternIndex, x-len]; + x = len; + } else { + // We completed this patternIndex, we put in the history that we + // are on the beginning of the next segment. + dashedLineToHistory = [(patternIndex+1)%pattern.length, 0]; + } + + // We do a line on a even pattern index and just move on a odd + // pattern index. The move is the empty space in the dash. + if (patternIndex % 2 === 0) { + realLineTo.call(this, x, 0); + } else { + realMoveTo.call(this, x, 0); + } + + // If we are not done, next loop process the next pattern segment, or + // the first segment again if we are at the end of the pattern. + patternIndex = (patternIndex+1) % pattern.length; + } + + this.restore(); + x1 = x2; + y1 = y2; + } + } + realStroke.call(this); + segments = []; + }; +}; + +/** + * Removes the previously-installed pattern. + * You must call installPattern() before calling this. You can install at most + * one pattern at a time--there is no pattern stack. + */ +CanvasRenderingContext2D.prototype.uninstallPattern = function() { + // This will be replaced by a non-error version when a pattern is installed. + throw "Must install a line pattern before uninstalling it."; +}; + +})(); +/** + * @license + * Copyright 2011 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview DygraphOptions is responsible for parsing and returning information about options. + * + * Still tightly coupled to Dygraphs, we could remove some of that, you know. + */ + +var DygraphOptions = (function() { +/*jshint strict:false */ + +// For "production" code, this gets set to false by uglifyjs. +// Need to define it outside of "use strict", hence the nested IIFEs. +if (typeof(DEBUG) === 'undefined') DEBUG=true; + +return (function() { + +// TODO: remove this jshint directive & fix the warnings. +/*jshint sub:true */ +/*global Dygraph:false */ +"use strict"; + +/* + * Interesting member variables: (REMOVING THIS LIST AS I CLOSURIZE) + * global_ - global attributes (common among all graphs, AIUI) + * user - attributes set by the user + * series_ - { seriesName -> { idx, yAxis, options }} + */ + +/** + * This parses attributes into an object that can be easily queried. + * + * It doesn't necessarily mean that all options are available, specifically + * if labels are not yet available, since those drive details of the per-series + * and per-axis options. + * + * @param {Dygraph} dygraph The chart to which these options belong. + * @constructor + */ +var DygraphOptions = function(dygraph) { + /** + * The dygraph. + * @type {!Dygraph} + */ + this.dygraph_ = dygraph; + + /** + * Array of axis index to { series : [ series names ] , options : { axis-specific options. } + * @type {Array.<{series : Array.<string>, options : Object}>} @private + */ + this.yAxes_ = []; + + /** + * Contains x-axis specific options, which are stored in the options key. + * This matches the yAxes_ object structure (by being a dictionary with an + * options element) allowing for shared code. + * @type {options: Object} @private + */ + this.xAxis_ = {}; + this.series_ = {}; + + // Once these two objects are initialized, you can call get(); + this.global_ = this.dygraph_.attrs_; + this.user_ = this.dygraph_.user_attrs_ || {}; + + /** + * A list of series in columnar order. + * @type {Array.<string>} + */ + this.labels_ = []; + + this.highlightSeries_ = this.get("highlightSeriesOpts") || {}; + this.reparseSeries(); +}; + +/** + * Not optimal, but does the trick when you're only using two axes. + * If we move to more axes, this can just become a function. + * + * @type {Object.<number>} + * @private + */ +DygraphOptions.AXIS_STRING_MAPPINGS_ = { + 'y' : 0, + 'Y' : 0, + 'y1' : 0, + 'Y1' : 0, + 'y2' : 1, + 'Y2' : 1 +}; + +/** + * @param {string|number} axis + * @private + */ +DygraphOptions.axisToIndex_ = function(axis) { + if (typeof(axis) == "string") { + if (DygraphOptions.AXIS_STRING_MAPPINGS_.hasOwnProperty(axis)) { + return DygraphOptions.AXIS_STRING_MAPPINGS_[axis]; + } + throw "Unknown axis : " + axis; + } + if (typeof(axis) == "number") { + if (axis === 0 || axis === 1) { + return axis; + } + throw "Dygraphs only supports two y-axes, indexed from 0-1."; + } + if (axis) { + throw "Unknown axis : " + axis; + } + // No axis specification means axis 0. + return 0; +}; + +/** + * Reparses options that are all related to series. This typically occurs when + * options are either updated, or source data has been made available. + * + * TODO(konigsberg): The method name is kind of weak; fix. + */ +DygraphOptions.prototype.reparseSeries = function() { + var labels = this.get("labels"); + if (!labels) { + return; // -- can't do more for now, will parse after getting the labels. + } + + this.labels_ = labels.slice(1); + + this.yAxes_ = [ { series : [], options : {}} ]; // Always one axis at least. + this.xAxis_ = { options : {} }; + this.series_ = {}; + + // Traditionally, per-series options were specified right up there with the options. For instance + // { + // labels: [ "X", "foo", "bar" ], + // pointSize: 3, + // foo : {}, // options for foo + // bar : {} // options for bar + // } + // + // Moving forward, series really should be specified in the series element, separating them. + // like so: + // + // { + // labels: [ "X", "foo", "bar" ], + // pointSize: 3, + // series : { + // foo : {}, // options for foo + // bar : {} // options for bar + // } + // } + // + // So, if series is found, it's expected to contain per-series data, otherwise we fall + // back. + var oldStyleSeries = !this.user_["series"]; + + if (oldStyleSeries) { + var axisId = 0; // 0-offset; there's always one. + // Go through once, add all the series, and for those with {} axis options, add a new axis. + for (var idx = 0; idx < this.labels_.length; idx++) { + var seriesName = this.labels_[idx]; + + var optionsForSeries = this.user_[seriesName] || {}; + + var yAxis = 0; + var axis = optionsForSeries["axis"]; + if (typeof(axis) == 'object') { + yAxis = ++axisId; + this.yAxes_[yAxis] = { series : [ seriesName ], options : axis }; + } + + // Associate series without axis options with axis 0. + if (!axis) { // undefined + this.yAxes_[0].series.push(seriesName); + } + + this.series_[seriesName] = { idx: idx, yAxis: yAxis, options : optionsForSeries }; + } + + // Go through one more time and assign series to an axis defined by another + // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } + for (var idx = 0; idx < this.labels_.length; idx++) { + var seriesName = this.labels_[idx]; + var optionsForSeries = this.series_[seriesName]["options"]; + var axis = optionsForSeries["axis"]; + + if (typeof(axis) == 'string') { + if (!this.series_.hasOwnProperty(axis)) { + console.error("Series " + seriesName + " wants to share a y-axis with " + + "series " + axis + ", which does not define its own axis."); + return; + } + var yAxis = this.series_[axis].yAxis; + this.series_[seriesName].yAxis = yAxis; + this.yAxes_[yAxis].series.push(seriesName); + } + } + } else { + for (var idx = 0; idx < this.labels_.length; idx++) { + var seriesName = this.labels_[idx]; + var optionsForSeries = this.user_.series[seriesName] || {}; + var yAxis = DygraphOptions.axisToIndex_(optionsForSeries["axis"]); + + this.series_[seriesName] = { + idx: idx, + yAxis: yAxis, + options : optionsForSeries }; + + if (!this.yAxes_[yAxis]) { + this.yAxes_[yAxis] = { series : [ seriesName ], options : {} }; + } else { + this.yAxes_[yAxis].series.push(seriesName); + } + } + } + + var axis_opts = this.user_["axes"] || {}; + Dygraph.update(this.yAxes_[0].options, axis_opts["y"] || {}); + if (this.yAxes_.length > 1) { + Dygraph.update(this.yAxes_[1].options, axis_opts["y2"] || {}); + } + Dygraph.update(this.xAxis_.options, axis_opts["x"] || {}); + + if (DEBUG) this.validateOptions_(); +}; + +/** + * Get a global value. + * + * @param {string} name the name of the option. + */ +DygraphOptions.prototype.get = function(name) { + var result = this.getGlobalUser_(name); + if (result !== null) { + return result; + } + return this.getGlobalDefault_(name); +}; + +DygraphOptions.prototype.getGlobalUser_ = function(name) { + if (this.user_.hasOwnProperty(name)) { + return this.user_[name]; + } + return null; +}; + +DygraphOptions.prototype.getGlobalDefault_ = function(name) { + if (this.global_.hasOwnProperty(name)) { + return this.global_[name]; + } + if (Dygraph.DEFAULT_ATTRS.hasOwnProperty(name)) { + return Dygraph.DEFAULT_ATTRS[name]; + } + return null; +}; + +/** + * Get a value for a specific axis. If there is no specific value for the axis, + * the global value is returned. + * + * @param {string} name the name of the option. + * @param {string|number} axis the axis to search. Can be the string representation + * ("y", "y2") or the axis number (0, 1). + */ +DygraphOptions.prototype.getForAxis = function(name, axis) { + var axisIdx; + var axisString; + + // Since axis can be a number or a string, straighten everything out here. + if (typeof(axis) == 'number') { + axisIdx = axis; + axisString = axisIdx === 0 ? "y" : "y2"; + } else { + if (axis == "y1") { axis = "y"; } // Standardize on 'y'. Is this bad? I think so. + if (axis == "y") { + axisIdx = 0; + } else if (axis == "y2") { + axisIdx = 1; + } else if (axis == "x") { + axisIdx = -1; // simply a placeholder for below. + } else { + throw "Unknown axis " + axis; + } + axisString = axis; + } + + var userAxis = (axisIdx == -1) ? this.xAxis_ : this.yAxes_[axisIdx]; + + // Search the user-specified axis option first. + if (userAxis) { // This condition could be removed if we always set up this.yAxes_ for y2. + var axisOptions = userAxis.options; + if (axisOptions.hasOwnProperty(name)) { + return axisOptions[name]; + } + } + + // User-specified global options second. + // But, hack, ignore globally-specified 'logscale' for 'x' axis declaration. + if (!(axis === 'x' && name === 'logscale')) { + var result = this.getGlobalUser_(name); + if (result !== null) { + return result; + } + } + // Default axis options third. + var defaultAxisOptions = Dygraph.DEFAULT_ATTRS.axes[axisString]; + if (defaultAxisOptions.hasOwnProperty(name)) { + return defaultAxisOptions[name]; + } + + // Default global options last. + return this.getGlobalDefault_(name); +}; + +/** + * Get a value for a specific series. If there is no specific value for the series, + * the value for the axis is returned (and afterwards, the global value.) + * + * @param {string} name the name of the option. + * @param {string} series the series to search. + */ +DygraphOptions.prototype.getForSeries = function(name, series) { + // Honors indexes as series. + if (series === this.dygraph_.getHighlightSeries()) { + if (this.highlightSeries_.hasOwnProperty(name)) { + return this.highlightSeries_[name]; + } + } + + if (!this.series_.hasOwnProperty(series)) { + throw "Unknown series: " + series; + } + + var seriesObj = this.series_[series]; + var seriesOptions = seriesObj["options"]; + if (seriesOptions.hasOwnProperty(name)) { + return seriesOptions[name]; + } + + return this.getForAxis(name, seriesObj["yAxis"]); +}; + +/** + * Returns the number of y-axes on the chart. + * @return {number} the number of axes. + */ +DygraphOptions.prototype.numAxes = function() { + return this.yAxes_.length; +}; + +/** + * Return the y-axis for a given series, specified by name. + */ +DygraphOptions.prototype.axisForSeries = function(series) { + return this.series_[series].yAxis; +}; + +/** + * Returns the options for the specified axis. + */ +// TODO(konigsberg): this is y-axis specific. Support the x axis. +DygraphOptions.prototype.axisOptions = function(yAxis) { + return this.yAxes_[yAxis].options; +}; + +/** + * Return the series associated with an axis. + */ +DygraphOptions.prototype.seriesForAxis = function(yAxis) { + return this.yAxes_[yAxis].series; +}; + +/** + * Return the list of all series, in their columnar order. + */ +DygraphOptions.prototype.seriesNames = function() { + return this.labels_; +}; + +if (DEBUG) { + +/** + * Validate all options. + * This requires Dygraph.OPTIONS_REFERENCE, which is only available in debug builds. + * @private + */ +DygraphOptions.prototype.validateOptions_ = function() { + if (typeof Dygraph.OPTIONS_REFERENCE === 'undefined') { + throw 'Called validateOptions_ in prod build.'; + } + + var that = this; + var validateOption = function(optionName) { + if (!Dygraph.OPTIONS_REFERENCE[optionName]) { + that.warnInvalidOption_(optionName); + } + }; + + var optionsDicts = [this.xAxis_.options, + this.yAxes_[0].options, + this.yAxes_[1] && this.yAxes_[1].options, + this.global_, + this.user_, + this.highlightSeries_]; + var names = this.seriesNames(); + for (var i = 0; i < names.length; i++) { + var name = names[i]; + if (this.series_.hasOwnProperty(name)) { + optionsDicts.push(this.series_[name].options); + } + } + for (var i = 0; i < optionsDicts.length; i++) { + var dict = optionsDicts[i]; + if (!dict) continue; + for (var optionName in dict) { + if (dict.hasOwnProperty(optionName)) { + validateOption(optionName); + } + } + } +}; + +var WARNINGS = {}; // Only show any particular warning once. + +/** + * Logs a warning about invalid options. + * TODO: make this throw for testing + * @private + */ +DygraphOptions.prototype.warnInvalidOption_ = function(optionName) { + if (!WARNINGS[optionName]) { + WARNINGS[optionName] = true; + var isSeries = (this.labels_.indexOf(optionName) >= 0); + if (isSeries) { + console.warn('Use new-style per-series options (saw ' + optionName + ' as top-level options key). See http://bit.ly/1tceaJs'); + } else { + console.warn('Unknown option ' + optionName + ' (full list of options at dygraphs.com/options.html'); + throw "invalid option " + optionName; + } + } +}; + +// Reset list of previously-shown warnings. Used for testing. +DygraphOptions.resetWarnings_ = function() { + WARNINGS = {}; +}; + +} + +return DygraphOptions; + +})(); +})(); +/** + * @license + * Copyright 2011 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview Based on PlotKitLayout, but modified to meet the needs of + * dygraphs. + */ + +var DygraphLayout = (function() { + +/*global Dygraph:false */ +"use strict"; + +/** + * Creates a new DygraphLayout object. + * + * This class contains all the data to be charted. + * It uses data coordinates, but also records the chart range (in data + * coordinates) and hence is able to calculate percentage positions ('In this + * view, Point A lies 25% down the x-axis.') + * + * Two things that it does not do are: + * 1. Record pixel coordinates for anything. + * 2. (oddly) determine anything about the layout of chart elements. + * + * The naming is a vestige of Dygraph's original PlotKit roots. + * + * @constructor + */ +var DygraphLayout = function(dygraph) { + this.dygraph_ = dygraph; + /** + * Array of points for each series. + * + * [series index][row index in series] = |Point| structure, + * where series index refers to visible series only, and the + * point index is for the reduced set of points for the current + * zoom region (including one point just outside the window). + * All points in the same row index share the same X value. + * + * @type {Array.<Array.<Dygraph.PointType>>} + */ + this.points = []; + this.setNames = []; + this.annotations = []; + this.yAxes_ = null; + + // TODO(danvk): it's odd that xTicks_ and yTicks_ are inputs, but xticks and + // yticks are outputs. Clean this up. + this.xTicks_ = null; + this.yTicks_ = null; +}; + +/** + * Add points for a single series. + * + * @param {string} setname Name of the series. + * @param {Array.<Dygraph.PointType>} set_xy Points for the series. + */ +DygraphLayout.prototype.addDataset = function(setname, set_xy) { + this.points.push(set_xy); + this.setNames.push(setname); +}; + +/** + * Returns the box which the chart should be drawn in. This is the canvas's + * box, less space needed for the axis and chart labels. + * + * @return {{x: number, y: number, w: number, h: number}} + */ +DygraphLayout.prototype.getPlotArea = function() { + return this.area_; +}; + +// Compute the box which the chart should be drawn in. This is the canvas's +// box, less space needed for axis, chart labels, and other plug-ins. +// NOTE: This should only be called by Dygraph.predraw_(). +DygraphLayout.prototype.computePlotArea = function() { + var area = { + // TODO(danvk): per-axis setting. + x: 0, + y: 0 + }; + + area.w = this.dygraph_.width_ - area.x - this.dygraph_.getOption('rightGap'); + area.h = this.dygraph_.height_; + + // Let plugins reserve space. + var e = { + chart_div: this.dygraph_.graphDiv, + reserveSpaceLeft: function(px) { + var r = { + x: area.x, + y: area.y, + w: px, + h: area.h + }; + area.x += px; + area.w -= px; + return r; + }, + reserveSpaceRight: function(px) { + var r = { + x: area.x + area.w - px, + y: area.y, + w: px, + h: area.h + }; + area.w -= px; + return r; + }, + reserveSpaceTop: function(px) { + var r = { + x: area.x, + y: area.y, + w: area.w, + h: px + }; + area.y += px; + area.h -= px; + return r; + }, + reserveSpaceBottom: function(px) { + var r = { + x: area.x, + y: area.y + area.h - px, + w: area.w, + h: px + }; + area.h -= px; + return r; + }, + chartRect: function() { + return {x:area.x, y:area.y, w:area.w, h:area.h}; + } + }; + this.dygraph_.cascadeEvents_('layout', e); + + this.area_ = area; +}; + +DygraphLayout.prototype.setAnnotations = function(ann) { + // The Dygraph object's annotations aren't parsed. We parse them here and + // save a copy. If there is no parser, then the user must be using raw format. + this.annotations = []; + var parse = this.dygraph_.getOption('xValueParser') || function(x) { return x; }; + for (var i = 0; i < ann.length; i++) { + var a = {}; + if (!ann[i].xval && ann[i].x === undefined) { + console.error("Annotations must have an 'x' property"); + return; + } + if (ann[i].icon && + !(ann[i].hasOwnProperty('width') && + ann[i].hasOwnProperty('height'))) { + console.error("Must set width and height when setting " + + "annotation.icon property"); + return; + } + Dygraph.update(a, ann[i]); + if (!a.xval) a.xval = parse(a.x); + this.annotations.push(a); + } +}; + +DygraphLayout.prototype.setXTicks = function(xTicks) { + this.xTicks_ = xTicks; +}; + +// TODO(danvk): add this to the Dygraph object's API or move it into Layout. +DygraphLayout.prototype.setYAxes = function (yAxes) { + this.yAxes_ = yAxes; +}; + +DygraphLayout.prototype.evaluate = function() { + this._xAxis = {}; + this._evaluateLimits(); + this._evaluateLineCharts(); + this._evaluateLineTicks(); + this._evaluateAnnotations(); +}; + +DygraphLayout.prototype._evaluateLimits = function() { + var xlimits = this.dygraph_.xAxisRange(); + this._xAxis.minval = xlimits[0]; + this._xAxis.maxval = xlimits[1]; + var xrange = xlimits[1] - xlimits[0]; + this._xAxis.scale = (xrange !== 0 ? 1 / xrange : 1.0); + + if (this.dygraph_.getOptionForAxis("logscale", 'x')) { + this._xAxis.xlogrange = Dygraph.log10(this._xAxis.maxval) - Dygraph.log10(this._xAxis.minval); + this._xAxis.xlogscale = (this._xAxis.xlogrange !== 0 ? 1.0 / this._xAxis.xlogrange : 1.0); + } + for (var i = 0; i < this.yAxes_.length; i++) { + var axis = this.yAxes_[i]; + axis.minyval = axis.computedValueRange[0]; + axis.maxyval = axis.computedValueRange[1]; + axis.yrange = axis.maxyval - axis.minyval; + axis.yscale = (axis.yrange !== 0 ? 1.0 / axis.yrange : 1.0); + + if (this.dygraph_.getOption("logscale")) { + axis.ylogrange = Dygraph.log10(axis.maxyval) - Dygraph.log10(axis.minyval); + axis.ylogscale = (axis.ylogrange !== 0 ? 1.0 / axis.ylogrange : 1.0); + if (!isFinite(axis.ylogrange) || isNaN(axis.ylogrange)) { + console.error('axis ' + i + ' of graph at ' + axis.g + + ' can\'t be displayed in log scale for range [' + + axis.minyval + ' - ' + axis.maxyval + ']'); + } + } + } +}; + +DygraphLayout.calcXNormal_ = function(value, xAxis, logscale) { + if (logscale) { + return ((Dygraph.log10(value) - Dygraph.log10(xAxis.minval)) * xAxis.xlogscale); + } else { + return (value - xAxis.minval) * xAxis.scale; + } +}; + +/** + * @param {DygraphAxisType} axis + * @param {number} value + * @param {boolean} logscale + * @return {number} + */ +DygraphLayout.calcYNormal_ = function(axis, value, logscale) { + if (logscale) { + var x = 1.0 - ((Dygraph.log10(value) - Dygraph.log10(axis.minyval)) * axis.ylogscale); + return isFinite(x) ? x : NaN; // shim for v8 issue; see pull request 276 + } else { + return 1.0 - ((value - axis.minyval) * axis.yscale); + } +}; + +DygraphLayout.prototype._evaluateLineCharts = function() { + var isStacked = this.dygraph_.getOption("stackedGraph"); + var isLogscaleForX = this.dygraph_.getOptionForAxis("logscale", 'x'); + + for (var setIdx = 0; setIdx < this.points.length; setIdx++) { + var points = this.points[setIdx]; + var setName = this.setNames[setIdx]; + var connectSeparated = this.dygraph_.getOption('connectSeparatedPoints', setName); + var axis = this.dygraph_.axisPropertiesForSeries(setName); + // TODO (konigsberg): use optionsForAxis instead. + var logscale = this.dygraph_.attributes_.getForSeries("logscale", setName); + + for (var j = 0; j < points.length; j++) { + var point = points[j]; + + // Range from 0-1 where 0 represents left and 1 represents right. + point.x = DygraphLayout.calcXNormal_(point.xval, this._xAxis, isLogscaleForX); + // Range from 0-1 where 0 represents top and 1 represents bottom + var yval = point.yval; + if (isStacked) { + point.y_stacked = DygraphLayout.calcYNormal_( + axis, point.yval_stacked, logscale); + if (yval !== null && !isNaN(yval)) { + yval = point.yval_stacked; + } + } + if (yval === null) { + yval = NaN; + if (!connectSeparated) { + point.yval = NaN; + } + } + point.y = DygraphLayout.calcYNormal_(axis, yval, logscale); + } + + this.dygraph_.dataHandler_.onLineEvaluated(points, axis, logscale); + } +}; + +DygraphLayout.prototype._evaluateLineTicks = function() { + var i, tick, label, pos; + this.xticks = []; + for (i = 0; i < this.xTicks_.length; i++) { + tick = this.xTicks_[i]; + label = tick.label; + pos = this.dygraph_.toPercentXCoord(tick.v); + if ((pos >= 0.0) && (pos < 1.0)) { + this.xticks.push([pos, label]); + } + } + + this.yticks = []; + for (i = 0; i < this.yAxes_.length; i++ ) { + var axis = this.yAxes_[i]; + for (var j = 0; j < axis.ticks.length; j++) { + tick = axis.ticks[j]; + label = tick.label; + pos = this.dygraph_.toPercentYCoord(tick.v, i); + if ((pos > 0.0) && (pos <= 1.0)) { + this.yticks.push([i, pos, label]); + } + } + } +}; + +DygraphLayout.prototype._evaluateAnnotations = function() { + // Add the annotations to the point to which they belong. + // Make a map from (setName, xval) to annotation for quick lookups. + var i; + var annotations = {}; + for (i = 0; i < this.annotations.length; i++) { + var a = this.annotations[i]; + annotations[a.xval + "," + a.series] = a; + } + + this.annotated_points = []; + + // Exit the function early if there are no annotations. + if (!this.annotations || !this.annotations.length) { + return; + } + + // TODO(antrob): loop through annotations not points. + for (var setIdx = 0; setIdx < this.points.length; setIdx++) { + var points = this.points[setIdx]; + for (i = 0; i < points.length; i++) { + var p = points[i]; + var k = p.xval + "," + p.name; + if (k in annotations) { + p.annotation = annotations[k]; + this.annotated_points.push(p); + } + } + } +}; + +/** + * Convenience function to remove all the data sets from a graph + */ +DygraphLayout.prototype.removeAllDatasets = function() { + delete this.points; + delete this.setNames; + delete this.setPointsLengths; + delete this.setPointsOffsets; + this.points = []; + this.setNames = []; + this.setPointsLengths = []; + this.setPointsOffsets = []; +}; + +return DygraphLayout; + +})(); +/** + * @license + * Copyright 2006 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview Based on PlotKit.CanvasRenderer, but modified to meet the + * needs of dygraphs. + * + * In particular, support for: + * - grid overlays + * - error bars + * - dygraphs attribute system + */ + +/** + * The DygraphCanvasRenderer class does the actual rendering of the chart onto + * a canvas. It's based on PlotKit.CanvasRenderer. + * @param {Object} element The canvas to attach to + * @param {Object} elementContext The 2d context of the canvas (injected so it + * can be mocked for testing.) + * @param {Layout} layout The DygraphLayout object for this graph. + * @constructor + */ + +var DygraphCanvasRenderer = (function() { +/*global Dygraph:false */ +"use strict"; + + +/** + * @constructor + * + * This gets called when there are "new points" to chart. This is generally the + * case when the underlying data being charted has changed. It is _not_ called + * in the common case that the user has zoomed or is panning the view. + * + * The chart canvas has already been created by the Dygraph object. The + * renderer simply gets a drawing context. + * + * @param {Dygraph} dygraph The chart to which this renderer belongs. + * @param {HTMLCanvasElement} element The <canvas> DOM element on which to draw. + * @param {CanvasRenderingContext2D} elementContext The drawing context. + * @param {DygraphLayout} layout The chart's DygraphLayout object. + * + * TODO(danvk): remove the elementContext property. + */ +var DygraphCanvasRenderer = function(dygraph, element, elementContext, layout) { + this.dygraph_ = dygraph; + + this.layout = layout; + this.element = element; + this.elementContext = elementContext; + + this.height = dygraph.height_; + this.width = dygraph.width_; + + // --- check whether everything is ok before we return + // NOTE(konigsberg): isIE is never defined in this object. Bug of some sort. + if (!this.isIE && !(Dygraph.isCanvasSupported(this.element))) + throw "Canvas is not supported."; + + // internal state + this.area = layout.getPlotArea(); + + // Set up a clipping area for the canvas (and the interaction canvas). + // This ensures that we don't overdraw. + if (this.dygraph_.isUsingExcanvas_) { + this._createIEClipArea(); + } else { + // on Android 3 and 4, setting a clipping area on a canvas prevents it from + // displaying anything. + if (!Dygraph.isAndroid()) { + var ctx = this.dygraph_.canvas_ctx_; + ctx.beginPath(); + ctx.rect(this.area.x, this.area.y, this.area.w, this.area.h); + ctx.clip(); + + ctx = this.dygraph_.hidden_ctx_; + ctx.beginPath(); + ctx.rect(this.area.x, this.area.y, this.area.w, this.area.h); + ctx.clip(); + } + } +}; + +/** + * Clears out all chart content and DOM elements. + * This is called immediately before render() on every frame, including + * during zooms and pans. + * @private + */ +DygraphCanvasRenderer.prototype.clear = function() { + var context; + if (this.isIE) { + // VML takes a while to start up, so we just poll every this.IEDelay + try { + if (this.clearDelay) { + this.clearDelay.cancel(); + this.clearDelay = null; + } + context = this.elementContext; + } + catch (e) { + // TODO(danvk): this is broken, since MochiKit.Async is gone. + // this.clearDelay = MochiKit.Async.wait(this.IEDelay); + // this.clearDelay.addCallback(bind(this.clear, this)); + return; + } + } + + context = this.elementContext; + context.clearRect(0, 0, this.width, this.height); +}; + +/** + * This method is responsible for drawing everything on the chart, including + * lines, error bars, fills and axes. + * It is called immediately after clear() on every frame, including during pans + * and zooms. + * @private + */ +DygraphCanvasRenderer.prototype.render = function() { + // attaches point.canvas{x,y} + this._updatePoints(); + + // actually draws the chart. + this._renderLineChart(); +}; + +DygraphCanvasRenderer.prototype._createIEClipArea = function() { + var className = 'dygraph-clip-div'; + var graphDiv = this.dygraph_.graphDiv; + + // Remove old clip divs. + for (var i = graphDiv.childNodes.length-1; i >= 0; i--) { + if (graphDiv.childNodes[i].className == className) { + graphDiv.removeChild(graphDiv.childNodes[i]); + } + } + + // Determine background color to give clip divs. + var backgroundColor = document.bgColor; + var element = this.dygraph_.graphDiv; + while (element != document) { + var bgcolor = element.currentStyle.backgroundColor; + if (bgcolor && bgcolor != 'transparent') { + backgroundColor = bgcolor; + break; + } + element = element.parentNode; + } + + function createClipDiv(area) { + if (area.w === 0 || area.h === 0) { + return; + } + var elem = document.createElement('div'); + elem.className = className; + elem.style.backgroundColor = backgroundColor; + elem.style.position = 'absolute'; + elem.style.left = area.x + 'px'; + elem.style.top = area.y + 'px'; + elem.style.width = area.w + 'px'; + elem.style.height = area.h + 'px'; + graphDiv.appendChild(elem); + } + + var plotArea = this.area; + // Left side + createClipDiv({ + x:0, y:0, + w:plotArea.x, + h:this.height + }); + + // Top + createClipDiv({ + x: plotArea.x, y: 0, + w: this.width - plotArea.x, + h: plotArea.y + }); + + // Right side + createClipDiv({ + x: plotArea.x + plotArea.w, y: 0, + w: this.width - plotArea.x - plotArea.w, + h: this.height + }); + + // Bottom + createClipDiv({ + x: plotArea.x, + y: plotArea.y + plotArea.h, + w: this.width - plotArea.x, + h: this.height - plotArea.h - plotArea.y + }); +}; + + +/** + * Returns a predicate to be used with an iterator, which will + * iterate over points appropriately, depending on whether + * connectSeparatedPoints is true. When it's false, the predicate will + * skip over points with missing yVals. + */ +DygraphCanvasRenderer._getIteratorPredicate = function(connectSeparatedPoints) { + return connectSeparatedPoints ? + DygraphCanvasRenderer._predicateThatSkipsEmptyPoints : + null; +}; + +DygraphCanvasRenderer._predicateThatSkipsEmptyPoints = + function(array, idx) { + return array[idx].yval !== null; +}; + +/** + * Draws a line with the styles passed in and calls all the drawPointCallbacks. + * @param {Object} e The dictionary passed to the plotter function. + * @private + */ +DygraphCanvasRenderer._drawStyledLine = function(e, + color, strokeWidth, strokePattern, drawPoints, + drawPointCallback, pointSize) { + var g = e.dygraph; + // TODO(konigsberg): Compute attributes outside this method call. + var stepPlot = g.getBooleanOption("stepPlot", e.setName); + + if (!Dygraph.isArrayLike(strokePattern)) { + strokePattern = null; + } + + var drawGapPoints = g.getBooleanOption('drawGapEdgePoints', e.setName); + + var points = e.points; + var setName = e.setName; + var iter = Dygraph.createIterator(points, 0, points.length, + DygraphCanvasRenderer._getIteratorPredicate( + g.getBooleanOption("connectSeparatedPoints", setName))); + + var stroking = strokePattern && (strokePattern.length >= 2); + + var ctx = e.drawingContext; + ctx.save(); + if (stroking) { + ctx.installPattern(strokePattern); + } + + var pointsOnLine = DygraphCanvasRenderer._drawSeries( + e, iter, strokeWidth, pointSize, drawPoints, drawGapPoints, stepPlot, color); + DygraphCanvasRenderer._drawPointsOnLine( + e, pointsOnLine, drawPointCallback, color, pointSize); + + if (stroking) { + ctx.uninstallPattern(); + } + + ctx.restore(); +}; + +/** + * This does the actual drawing of lines on the canvas, for just one series. + * Returns a list of [canvasx, canvasy] pairs for points for which a + * drawPointCallback should be fired. These include isolated points, or all + * points if drawPoints=true. + * @param {Object} e The dictionary passed to the plotter function. + * @private + */ +DygraphCanvasRenderer._drawSeries = function(e, + iter, strokeWidth, pointSize, drawPoints, drawGapPoints, stepPlot, color) { + + var prevCanvasX = null; + var prevCanvasY = null; + var nextCanvasY = null; + var isIsolated; // true if this point is isolated (no line segments) + var point; // the point being processed in the while loop + var pointsOnLine = []; // Array of [canvasx, canvasy] pairs. + var first = true; // the first cycle through the while loop + + var ctx = e.drawingContext; + ctx.beginPath(); + ctx.strokeStyle = color; + ctx.lineWidth = strokeWidth; + + // NOTE: we break the iterator's encapsulation here for about a 25% speedup. + var arr = iter.array_; + var limit = iter.end_; + var predicate = iter.predicate_; + + for (var i = iter.start_; i < limit; i++) { + point = arr[i]; + if (predicate) { + while (i < limit && !predicate(arr, i)) { + i++; + } + if (i == limit) break; + point = arr[i]; + } + + // FIXME: The 'canvasy != canvasy' test here catches NaN values but the test + // doesn't catch Infinity values. Could change this to + // !isFinite(point.canvasy), but I assume it avoids isNaN for performance? + if (point.canvasy === null || point.canvasy != point.canvasy) { + if (stepPlot && prevCanvasX !== null) { + // Draw a horizontal line to the start of the missing data + ctx.moveTo(prevCanvasX, prevCanvasY); + ctx.lineTo(point.canvasx, prevCanvasY); + } + prevCanvasX = prevCanvasY = null; + } else { + isIsolated = false; + if (drawGapPoints || !prevCanvasX) { + iter.nextIdx_ = i; + iter.next(); + nextCanvasY = iter.hasNext ? iter.peek.canvasy : null; + + var isNextCanvasYNullOrNaN = nextCanvasY === null || + nextCanvasY != nextCanvasY; + isIsolated = (!prevCanvasX && isNextCanvasYNullOrNaN); + if (drawGapPoints) { + // Also consider a point to be "isolated" if it's adjacent to a + // null point, excluding the graph edges. + if ((!first && !prevCanvasX) || + (iter.hasNext && isNextCanvasYNullOrNaN)) { + isIsolated = true; + } + } + } + + if (prevCanvasX !== null) { + if (strokeWidth) { + if (stepPlot) { + ctx.moveTo(prevCanvasX, prevCanvasY); + ctx.lineTo(point.canvasx, prevCanvasY); + } + + ctx.lineTo(point.canvasx, point.canvasy); + } + } else { + ctx.moveTo(point.canvasx, point.canvasy); + } + if (drawPoints || isIsolated) { + pointsOnLine.push([point.canvasx, point.canvasy, point.idx]); + } + prevCanvasX = point.canvasx; + prevCanvasY = point.canvasy; + } + first = false; + } + ctx.stroke(); + return pointsOnLine; +}; + +/** + * This fires the drawPointCallback functions, which draw dots on the points by + * default. This gets used when the "drawPoints" option is set, or when there + * are isolated points. + * @param {Object} e The dictionary passed to the plotter function. + * @private + */ +DygraphCanvasRenderer._drawPointsOnLine = function( + e, pointsOnLine, drawPointCallback, color, pointSize) { + var ctx = e.drawingContext; + for (var idx = 0; idx < pointsOnLine.length; idx++) { + var cb = pointsOnLine[idx]; + ctx.save(); + drawPointCallback.call(e.dygraph, + e.dygraph, e.setName, ctx, cb[0], cb[1], color, pointSize, cb[2]); + ctx.restore(); + } +}; + +/** + * Attaches canvas coordinates to the points array. + * @private + */ +DygraphCanvasRenderer.prototype._updatePoints = function() { + // Update Points + // TODO(danvk): here + // + // TODO(bhs): this loop is a hot-spot for high-point-count charts. These + // transformations can be pushed into the canvas via linear transformation + // matrices. + // NOTE(danvk): this is trickier than it sounds at first. The transformation + // needs to be done before the .moveTo() and .lineTo() calls, but must be + // undone before the .stroke() call to ensure that the stroke width is + // unaffected. An alternative is to reduce the stroke width in the + // transformed coordinate space, but you can't specify different values for + // each dimension (as you can with .scale()). The speedup here is ~12%. + var sets = this.layout.points; + for (var i = sets.length; i--;) { + var points = sets[i]; + for (var j = points.length; j--;) { + var point = points[j]; + point.canvasx = this.area.w * point.x + this.area.x; + point.canvasy = this.area.h * point.y + this.area.y; + } + } +}; + +/** + * Add canvas Actually draw the lines chart, including error bars. + * + * This function can only be called if DygraphLayout's points array has been + * updated with canvas{x,y} attributes, i.e. by + * DygraphCanvasRenderer._updatePoints. + * + * @param {string=} opt_seriesName when specified, only that series will + * be drawn. (This is used for expedited redrawing with highlightSeriesOpts) + * @param {CanvasRenderingContext2D} opt_ctx when specified, the drawing + * context. However, lines are typically drawn on the object's + * elementContext. + * @private + */ +DygraphCanvasRenderer.prototype._renderLineChart = function(opt_seriesName, opt_ctx) { + var ctx = opt_ctx || this.elementContext; + var i; + + var sets = this.layout.points; + var setNames = this.layout.setNames; + var setName; + + this.colors = this.dygraph_.colorsMap_; + + // Determine which series have specialized plotters. + var plotter_attr = this.dygraph_.getOption("plotter"); + var plotters = plotter_attr; + if (!Dygraph.isArrayLike(plotters)) { + plotters = [plotters]; + } + + var setPlotters = {}; // series name -> plotter fn. + for (i = 0; i < setNames.length; i++) { + setName = setNames[i]; + var setPlotter = this.dygraph_.getOption("plotter", setName); + if (setPlotter == plotter_attr) continue; // not specialized. + + setPlotters[setName] = setPlotter; + } + + for (i = 0; i < plotters.length; i++) { + var plotter = plotters[i]; + var is_last = (i == plotters.length - 1); + + for (var j = 0; j < sets.length; j++) { + setName = setNames[j]; + if (opt_seriesName && setName != opt_seriesName) continue; + + var points = sets[j]; + + // Only throw in the specialized plotters on the last iteration. + var p = plotter; + if (setName in setPlotters) { + if (is_last) { + p = setPlotters[setName]; + } else { + // Don't use the standard plotters in this case. + continue; + } + } + + var color = this.colors[setName]; + var strokeWidth = this.dygraph_.getOption("strokeWidth", setName); + + ctx.save(); + ctx.strokeStyle = color; + ctx.lineWidth = strokeWidth; + p({ + points: points, + setName: setName, + drawingContext: ctx, + color: color, + strokeWidth: strokeWidth, + dygraph: this.dygraph_, + axis: this.dygraph_.axisPropertiesForSeries(setName), + plotArea: this.area, + seriesIndex: j, + seriesCount: sets.length, + singleSeriesName: opt_seriesName, + allSeriesPoints: sets + }); + ctx.restore(); + } + } +}; + +/** + * Standard plotters. These may be used by clients via Dygraph.Plotters. + * See comments there for more details. + */ +DygraphCanvasRenderer._Plotters = { + linePlotter: function(e) { + DygraphCanvasRenderer._linePlotter(e); + }, + + fillPlotter: function(e) { + DygraphCanvasRenderer._fillPlotter(e); + }, + + errorPlotter: function(e) { + DygraphCanvasRenderer._errorPlotter(e); + } +}; + +/** + * Plotter which draws the central lines for a series. + * @private + */ +DygraphCanvasRenderer._linePlotter = function(e) { + var g = e.dygraph; + var setName = e.setName; + var strokeWidth = e.strokeWidth; + + // TODO(danvk): Check if there's any performance impact of just calling + // getOption() inside of _drawStyledLine. Passing in so many parameters makes + // this code a bit nasty. + var borderWidth = g.getNumericOption("strokeBorderWidth", setName); + var drawPointCallback = g.getOption("drawPointCallback", setName) || + Dygraph.Circles.DEFAULT; + var strokePattern = g.getOption("strokePattern", setName); + var drawPoints = g.getBooleanOption("drawPoints", setName); + var pointSize = g.getNumericOption("pointSize", setName); + + if (borderWidth && strokeWidth) { + DygraphCanvasRenderer._drawStyledLine(e, + g.getOption("strokeBorderColor", setName), + strokeWidth + 2 * borderWidth, + strokePattern, + drawPoints, + drawPointCallback, + pointSize + ); + } + + DygraphCanvasRenderer._drawStyledLine(e, + e.color, + strokeWidth, + strokePattern, + drawPoints, + drawPointCallback, + pointSize + ); +}; + +/** + * Draws the shaded error bars/confidence intervals for each series. + * This happens before the center lines are drawn, since the center lines + * need to be drawn on top of the error bars for all series. + * @private + */ +DygraphCanvasRenderer._errorPlotter = function(e) { + var g = e.dygraph; + var setName = e.setName; + var errorBars = g.getBooleanOption("errorBars") || + g.getBooleanOption("customBars"); + if (!errorBars) return; + + var fillGraph = g.getBooleanOption("fillGraph", setName); + if (fillGraph) { + console.warn("Can't use fillGraph option with error bars"); + } + + var ctx = e.drawingContext; + var color = e.color; + var fillAlpha = g.getNumericOption('fillAlpha', setName); + var stepPlot = g.getBooleanOption("stepPlot", setName); + var points = e.points; + + var iter = Dygraph.createIterator(points, 0, points.length, + DygraphCanvasRenderer._getIteratorPredicate( + g.getBooleanOption("connectSeparatedPoints", setName))); + + var newYs; + + // setup graphics context + var prevX = NaN; + var prevY = NaN; + var prevYs = [-1, -1]; + // should be same color as the lines but only 15% opaque. + var rgb = Dygraph.toRGB_(color); + var err_color = + 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + fillAlpha + ')'; + ctx.fillStyle = err_color; + ctx.beginPath(); + + var isNullUndefinedOrNaN = function(x) { + return (x === null || + x === undefined || + isNaN(x)); + }; + + while (iter.hasNext) { + var point = iter.next(); + if ((!stepPlot && isNullUndefinedOrNaN(point.y)) || + (stepPlot && !isNaN(prevY) && isNullUndefinedOrNaN(prevY))) { + prevX = NaN; + continue; + } + + newYs = [ point.y_bottom, point.y_top ]; + if (stepPlot) { + prevY = point.y; + } + + // The documentation specifically disallows nulls inside the point arrays, + // but in case it happens we should do something sensible. + if (isNaN(newYs[0])) newYs[0] = point.y; + if (isNaN(newYs[1])) newYs[1] = point.y; + + newYs[0] = e.plotArea.h * newYs[0] + e.plotArea.y; + newYs[1] = e.plotArea.h * newYs[1] + e.plotArea.y; + if (!isNaN(prevX)) { + if (stepPlot) { + ctx.moveTo(prevX, prevYs[0]); + ctx.lineTo(point.canvasx, prevYs[0]); + ctx.lineTo(point.canvasx, prevYs[1]); + } else { + ctx.moveTo(prevX, prevYs[0]); + ctx.lineTo(point.canvasx, newYs[0]); + ctx.lineTo(point.canvasx, newYs[1]); + } + ctx.lineTo(prevX, prevYs[1]); + ctx.closePath(); + } + prevYs = newYs; + prevX = point.canvasx; + } + ctx.fill(); +}; + + +/** + * Proxy for CanvasRenderingContext2D which drops moveTo/lineTo calls which are + * superfluous. It accumulates all movements which haven't changed the x-value + * and only applies the two with the most extreme y-values. + * + * Calls to lineTo/moveTo must have non-decreasing x-values. + */ +DygraphCanvasRenderer._fastCanvasProxy = function(context) { + var pendingActions = []; // array of [type, x, y] tuples + var lastRoundedX = null; + + var LINE_TO = 1, + MOVE_TO = 2; + + var actionCount = 0; // number of moveTos and lineTos passed to context. + + // Drop superfluous motions + // Assumes all pendingActions have the same (rounded) x-value. + var compressActions = function(opt_losslessOnly) { + if (pendingActions.length <= 1) return; + + // Lossless compression: drop inconsequential moveTos. + for (var i = pendingActions.length - 1; i > 0; i--) { + var action = pendingActions[i]; + if (action[0] == MOVE_TO) { + var prevAction = pendingActions[i - 1]; + if (prevAction[1] == action[1] && prevAction[2] == action[2]) { + pendingActions.splice(i, 1); + } + } + } + + // Lossless compression: ... drop consecutive moveTos ... + for (var i = 0; i < pendingActions.length - 1; /* incremented internally */) { + var action = pendingActions[i]; + if (action[0] == MOVE_TO && pendingActions[i + 1][0] == MOVE_TO) { + pendingActions.splice(i, 1); + } else { + i++; + } + } + + // Lossy compression: ... drop all but the extreme y-values ... + if (pendingActions.length > 2 && !opt_losslessOnly) { + // keep an initial moveTo, but drop all others. + var startIdx = 0; + if (pendingActions[0][0] == MOVE_TO) startIdx++; + var minIdx = null, maxIdx = null; + for (var i = startIdx; i < pendingActions.length; i++) { + var action = pendingActions[i]; + if (action[0] != LINE_TO) continue; + if (minIdx === null && maxIdx === null) { + minIdx = i; + maxIdx = i; + } else { + var y = action[2]; + if (y < pendingActions[minIdx][2]) { + minIdx = i; + } else if (y > pendingActions[maxIdx][2]) { + maxIdx = i; + } + } + } + var minAction = pendingActions[minIdx], + maxAction = pendingActions[maxIdx]; + pendingActions.splice(startIdx, pendingActions.length - startIdx); + if (minIdx < maxIdx) { + pendingActions.push(minAction); + pendingActions.push(maxAction); + } else if (minIdx > maxIdx) { + pendingActions.push(maxAction); + pendingActions.push(minAction); + } else { + pendingActions.push(minAction); + } + } + }; + + var flushActions = function(opt_noLossyCompression) { + compressActions(opt_noLossyCompression); + for (var i = 0, len = pendingActions.length; i < len; i++) { + var action = pendingActions[i]; + if (action[0] == LINE_TO) { + context.lineTo(action[1], action[2]); + } else if (action[0] == MOVE_TO) { + context.moveTo(action[1], action[2]); + } + } + actionCount += pendingActions.length; + pendingActions = []; + }; + + var addAction = function(action, x, y) { + var rx = Math.round(x); + if (lastRoundedX === null || rx != lastRoundedX) { + flushActions(); + lastRoundedX = rx; + } + pendingActions.push([action, x, y]); + }; + + return { + moveTo: function(x, y) { + addAction(MOVE_TO, x, y); + }, + lineTo: function(x, y) { + addAction(LINE_TO, x, y); + }, + + // for major operations like stroke/fill, we skip compression to ensure + // that there are no artifacts at the right edge. + stroke: function() { flushActions(true); context.stroke(); }, + fill: function() { flushActions(true); context.fill(); }, + beginPath: function() { flushActions(true); context.beginPath(); }, + closePath: function() { flushActions(true); context.closePath(); }, + + _count: function() { return actionCount; } + }; +}; + +/** + * Draws the shaded regions when "fillGraph" is set. Not to be confused with + * error bars. + * + * For stacked charts, it's more convenient to handle all the series + * simultaneously. So this plotter plots all the points on the first series + * it's asked to draw, then ignores all the other series. + * + * @private + */ +DygraphCanvasRenderer._fillPlotter = function(e) { + // Skip if we're drawing a single series for interactive highlight overlay. + if (e.singleSeriesName) return; + + // We'll handle all the series at once, not one-by-one. + if (e.seriesIndex !== 0) return; + + var g = e.dygraph; + var setNames = g.getLabels().slice(1); // remove x-axis + + // getLabels() includes names for invisible series, which are not included in + // allSeriesPoints. We remove those to make the two match. + // TODO(danvk): provide a simpler way to get this information. + for (var i = setNames.length; i >= 0; i--) { + if (!g.visibility()[i]) setNames.splice(i, 1); + } + + var anySeriesFilled = (function() { + for (var i = 0; i < setNames.length; i++) { + if (g.getBooleanOption("fillGraph", setNames[i])) return true; + } + return false; + })(); + + if (!anySeriesFilled) return; + + var area = e.plotArea; + var sets = e.allSeriesPoints; + var setCount = sets.length; + + var fillAlpha = g.getNumericOption('fillAlpha'); + var stackedGraph = g.getBooleanOption("stackedGraph"); + var colors = g.getColors(); + + // For stacked graphs, track the baseline for filling. + // + // The filled areas below graph lines are trapezoids with two + // vertical edges. The top edge is the line segment being drawn, and + // the baseline is the bottom edge. Each baseline corresponds to the + // top line segment from the previous stacked line. In the case of + // step plots, the trapezoids are rectangles. + var baseline = {}; + var currBaseline; + var prevStepPlot; // for different line drawing modes (line/step) per series + + // Helper function to trace a line back along the baseline. + var traceBackPath = function(ctx, baselineX, baselineY, pathBack) { + ctx.lineTo(baselineX, baselineY); + if (stackedGraph) { + for (var i = pathBack.length - 1; i >= 0; i--) { + var pt = pathBack[i]; + ctx.lineTo(pt[0], pt[1]); + } + } + }; + + // process sets in reverse order (needed for stacked graphs) + for (var setIdx = setCount - 1; setIdx >= 0; setIdx--) { + var ctx = e.drawingContext; + var setName = setNames[setIdx]; + if (!g.getBooleanOption('fillGraph', setName)) continue; + + var stepPlot = g.getBooleanOption('stepPlot', setName); + var color = colors[setIdx]; + var axis = g.axisPropertiesForSeries(setName); + var axisY = 1.0 + axis.minyval * axis.yscale; + if (axisY < 0.0) axisY = 0.0; + else if (axisY > 1.0) axisY = 1.0; + axisY = area.h * axisY + area.y; + + var points = sets[setIdx]; + var iter = Dygraph.createIterator(points, 0, points.length, + DygraphCanvasRenderer._getIteratorPredicate( + g.getBooleanOption("connectSeparatedPoints", setName))); + + // setup graphics context + var prevX = NaN; + var prevYs = [-1, -1]; + var newYs; + // should be same color as the lines but only 15% opaque. + var rgb = Dygraph.toRGB_(color); + var err_color = + 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + fillAlpha + ')'; + ctx.fillStyle = err_color; + ctx.beginPath(); + var last_x, is_first = true; + + // If the point density is high enough, dropping segments on their way to + // the canvas justifies the overhead of doing so. + if (points.length > 2 * g.width_) { + ctx = DygraphCanvasRenderer._fastCanvasProxy(ctx); + } + + // For filled charts, we draw points from left to right, then back along + // the x-axis to complete a shape for filling. + // For stacked plots, this "back path" is a more complex shape. This array + // stores the [x, y] values needed to trace that shape. + var pathBack = []; + + // TODO(danvk): there are a lot of options at play in this loop. + // The logic would be much clearer if some (e.g. stackGraph and + // stepPlot) were split off into separate sub-plotters. + var point; + while (iter.hasNext) { + point = iter.next(); + if (!Dygraph.isOK(point.y) && !stepPlot) { + traceBackPath(ctx, prevX, prevYs[1], pathBack); + pathBack = []; + prevX = NaN; + if (point.y_stacked !== null && !isNaN(point.y_stacked)) { + baseline[point.canvasx] = area.h * point.y_stacked + area.y; + } + continue; + } + if (stackedGraph) { + if (!is_first && last_x == point.xval) { + continue; + } else { + is_first = false; + last_x = point.xval; + } + + currBaseline = baseline[point.canvasx]; + var lastY; + if (currBaseline === undefined) { + lastY = axisY; + } else { + if(prevStepPlot) { + lastY = currBaseline[0]; + } else { + lastY = currBaseline; + } + } + newYs = [ point.canvasy, lastY ]; + + if (stepPlot) { + // Step plots must keep track of the top and bottom of + // the baseline at each point. + if (prevYs[0] === -1) { + baseline[point.canvasx] = [ point.canvasy, axisY ]; + } else { + baseline[point.canvasx] = [ point.canvasy, prevYs[0] ]; + } + } else { + baseline[point.canvasx] = point.canvasy; + } + + } else { + if (isNaN(point.canvasy) && stepPlot) { + newYs = [ area.y + area.h, axisY ]; + } else { + newYs = [ point.canvasy, axisY ]; + } + } + if (!isNaN(prevX)) { + // Move to top fill point + if (stepPlot) { + ctx.lineTo(point.canvasx, prevYs[0]); + ctx.lineTo(point.canvasx, newYs[0]); + } else { + ctx.lineTo(point.canvasx, newYs[0]); + } + + // Record the baseline for the reverse path. + if (stackedGraph) { + pathBack.push([prevX, prevYs[1]]); + if (prevStepPlot && currBaseline) { + // Draw to the bottom of the baseline + pathBack.push([point.canvasx, currBaseline[1]]); + } else { + pathBack.push([point.canvasx, newYs[1]]); + } + } + } else { + ctx.moveTo(point.canvasx, newYs[1]); + ctx.lineTo(point.canvasx, newYs[0]); + } + prevYs = newYs; + prevX = point.canvasx; + } + prevStepPlot = stepPlot; + if (newYs && point) { + traceBackPath(ctx, point.canvasx, newYs[1], pathBack); + pathBack = []; + } + ctx.fill(); + } +}; + +return DygraphCanvasRenderer; + +})(); +/** + * @license + * Copyright 2006 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview Creates an interactive, zoomable graph based on a CSV file or + * string. Dygraph can handle multiple series with or without error bars. The + * date/value ranges will be automatically set. Dygraph uses the + * <canvas> tag, so it only works in FF1.5+. + * @author danvdk@gmail.com (Dan Vanderkam) + + Usage: + <div id="graphdiv" style="width:800px; height:500px;"></div> + <script type="text/javascript"> + new Dygraph(document.getElementById("graphdiv"), + "datafile.csv", // CSV file with headers + { }); // options + </script> + + The CSV file is of the form + + Date,SeriesA,SeriesB,SeriesC + YYYYMMDD,A1,B1,C1 + YYYYMMDD,A2,B2,C2 + + If the 'errorBars' option is set in the constructor, the input should be of + the form + Date,SeriesA,SeriesB,... + YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... + YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... + + If the 'fractions' option is set, the input should be of the form: + + Date,SeriesA,SeriesB,... + YYYYMMDD,A1/B1,A2/B2,... + YYYYMMDD,A1/B1,A2/B2,... + + And error bars will be calculated automatically using a binomial distribution. + + For further documentation and examples, see http://dygraphs.com/ + + */ + +// For "production" code, this gets set to false by uglifyjs. +if (typeof(DEBUG) === 'undefined') DEBUG=true; + +var Dygraph = (function() { +/*global DygraphLayout:false, DygraphCanvasRenderer:false, DygraphOptions:false, G_vmlCanvasManager:false,ActiveXObject:false */ +"use strict"; + +/** + * Creates an interactive, zoomable chart. + * + * @constructor + * @param {div | String} div A div or the id of a div into which to construct + * the chart. + * @param {String | Function} file A file containing CSV data or a function + * that returns this data. The most basic expected format for each line is + * "YYYY/MM/DD,val1,val2,...". For more information, see + * http://dygraphs.com/data.html. + * @param {Object} attrs Various other attributes, e.g. errorBars determines + * whether the input data contains error ranges. For a complete list of + * options, see http://dygraphs.com/options.html. + */ +var Dygraph = function(div, data, opts, opt_fourth_param) { + // These have to go above the "Hack for IE" in __init__ since .ready() can be + // called as soon as the constructor returns. Once support for OldIE is + // dropped, this can go down with the rest of the initializers. + this.is_initial_draw_ = true; + this.readyFns_ = []; + + if (opt_fourth_param !== undefined) { + // Old versions of dygraphs took in the series labels as a constructor + // parameter. This doesn't make sense anymore, but it's easy to continue + // to support this usage. + console.warn("Using deprecated four-argument dygraph constructor"); + this.__old_init__(div, data, opts, opt_fourth_param); + } else { + this.__init__(div, data, opts); + } +}; + +Dygraph.NAME = "Dygraph"; +Dygraph.VERSION = "1.1.0"; +Dygraph.__repr__ = function() { + return "[" + Dygraph.NAME + " " + Dygraph.VERSION + "]"; +}; + +/** + * Returns information about the Dygraph class. + */ +Dygraph.toString = function() { + return Dygraph.__repr__(); +}; + +// Various default values +Dygraph.DEFAULT_ROLL_PERIOD = 1; +Dygraph.DEFAULT_WIDTH = 480; +Dygraph.DEFAULT_HEIGHT = 320; + +// For max 60 Hz. animation: +Dygraph.ANIMATION_STEPS = 12; +Dygraph.ANIMATION_DURATION = 200; + +// Label constants for the labelsKMB and labelsKMG2 options. +// (i.e. '100000' -> '100K') +Dygraph.KMB_LABELS = [ 'K', 'M', 'B', 'T', 'Q' ]; +Dygraph.KMG2_BIG_LABELS = [ 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' ]; +Dygraph.KMG2_SMALL_LABELS = [ 'm', 'u', 'n', 'p', 'f', 'a', 'z', 'y' ]; + +// These are defined before DEFAULT_ATTRS so that it can refer to them. +/** + * @private + * Return a string version of a number. This respects the digitsAfterDecimal + * and maxNumberWidth options. + * @param {number} x The number to be formatted + * @param {Dygraph} opts An options view + */ +Dygraph.numberValueFormatter = function(x, opts) { + var sigFigs = opts('sigFigs'); + + if (sigFigs !== null) { + // User has opted for a fixed number of significant figures. + return Dygraph.floatFormat(x, sigFigs); + } + + var digits = opts('digitsAfterDecimal'); + var maxNumberWidth = opts('maxNumberWidth'); + + var kmb = opts('labelsKMB'); + var kmg2 = opts('labelsKMG2'); + + var label; + + // switch to scientific notation if we underflow or overflow fixed display. + if (x !== 0.0 && + (Math.abs(x) >= Math.pow(10, maxNumberWidth) || + Math.abs(x) < Math.pow(10, -digits))) { + label = x.toExponential(digits); + } else { + label = '' + Dygraph.round_(x, digits); + } + + if (kmb || kmg2) { + var k; + var k_labels = []; + var m_labels = []; + if (kmb) { + k = 1000; + k_labels = Dygraph.KMB_LABELS; + } + if (kmg2) { + if (kmb) console.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); + k = 1024; + k_labels = Dygraph.KMG2_BIG_LABELS; + m_labels = Dygraph.KMG2_SMALL_LABELS; + } + + var absx = Math.abs(x); + var n = Dygraph.pow(k, k_labels.length); + for (var j = k_labels.length - 1; j >= 0; j--, n /= k) { + if (absx >= n) { + label = Dygraph.round_(x / n, digits) + k_labels[j]; + break; + } + } + if (kmg2) { + // TODO(danvk): clean up this logic. Why so different than kmb? + var x_parts = String(x.toExponential()).split('e-'); + if (x_parts.length === 2 && x_parts[1] >= 3 && x_parts[1] <= 24) { + if (x_parts[1] % 3 > 0) { + label = Dygraph.round_(x_parts[0] / + Dygraph.pow(10, (x_parts[1] % 3)), + digits); + } else { + label = Number(x_parts[0]).toFixed(2); + } + label += m_labels[Math.floor(x_parts[1] / 3) - 1]; + } + } + } + + return label; +}; + +/** + * variant for use as an axisLabelFormatter. + * @private + */ +Dygraph.numberAxisLabelFormatter = function(x, granularity, opts) { + return Dygraph.numberValueFormatter(x, opts); +}; + +/** + * @type {!Array.<string>} + * @private + * @constant + */ +Dygraph.SHORT_MONTH_NAMES_ = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']; + + +/** + * Convert a JS date to a string appropriate to display on an axis that + * is displaying values at the stated granularity. This respects the + * labelsUTC option. + * @param {Date} date The date to format + * @param {number} granularity One of the Dygraph granularity constants + * @param {Dygraph} opts An options view + * @return {string} The date formatted as local time + * @private + */ +Dygraph.dateAxisLabelFormatter = function(date, granularity, opts) { + var utc = opts('labelsUTC'); + var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal; + + var year = accessors.getFullYear(date), + month = accessors.getMonth(date), + day = accessors.getDate(date), + hours = accessors.getHours(date), + mins = accessors.getMinutes(date), + secs = accessors.getSeconds(date), + millis = accessors.getSeconds(date); + + if (granularity >= Dygraph.DECADAL) { + return '' + year; + } else if (granularity >= Dygraph.MONTHLY) { + return Dygraph.SHORT_MONTH_NAMES_[month] + ' ' + year; + } else { + var frac = hours * 3600 + mins * 60 + secs + 1e-3 * millis; + if (frac === 0 || granularity >= Dygraph.DAILY) { + // e.g. '21 Jan' (%d%b) + return Dygraph.zeropad(day) + ' ' + Dygraph.SHORT_MONTH_NAMES_[month]; + } else { + return Dygraph.hmsString_(hours, mins, secs); + } + } +}; +// alias in case anyone is referencing the old method. +Dygraph.dateAxisFormatter = Dygraph.dateAxisLabelFormatter; + +/** + * Return a string version of a JS date for a value label. This respects the + * labelsUTC option. + * @param {Date} date The date to be formatted + * @param {Dygraph} opts An options view + * @private + */ +Dygraph.dateValueFormatter = function(d, opts) { + return Dygraph.dateString_(d, opts('labelsUTC')); +}; + +/** + * Standard plotters. These may be used by clients. + * Available plotters are: + * - Dygraph.Plotters.linePlotter: draws central lines (most common) + * - Dygraph.Plotters.errorPlotter: draws error bars + * - Dygraph.Plotters.fillPlotter: draws fills under lines (used with fillGraph) + * + * By default, the plotter is [fillPlotter, errorPlotter, linePlotter]. + * This causes all the lines to be drawn over all the fills/error bars. + */ +Dygraph.Plotters = DygraphCanvasRenderer._Plotters; + + +// Default attribute values. +Dygraph.DEFAULT_ATTRS = { + highlightCircleSize: 3, + highlightSeriesOpts: null, + highlightSeriesBackgroundAlpha: 0.5, + + labelsDivWidth: 250, + labelsDivStyles: { + // TODO(danvk): move defaults from createStatusMessage_ here. + }, + labelsSeparateLines: false, + labelsShowZeroValues: true, + labelsKMB: false, + labelsKMG2: false, + showLabelsOnHighlight: true, + + digitsAfterDecimal: 2, + maxNumberWidth: 6, + sigFigs: null, + + strokeWidth: 1.0, + strokeBorderWidth: 0, + strokeBorderColor: "white", + + axisTickSize: 3, + axisLabelFontSize: 14, + rightGap: 5, + + showRoller: false, + xValueParser: Dygraph.dateParser, + + delimiter: ',', + + sigma: 2.0, + errorBars: false, + fractions: false, + wilsonInterval: true, // only relevant if fractions is true + customBars: false, + fillGraph: false, + fillAlpha: 0.15, + connectSeparatedPoints: false, + + stackedGraph: false, + stackedGraphNaNFill: 'all', + hideOverlayOnMouseOut: true, + + legend: 'onmouseover', + stepPlot: false, + avoidMinZero: false, + xRangePad: 0, + yRangePad: null, + drawAxesAtZero: false, + + // Sizes of the various chart labels. + titleHeight: 28, + xLabelHeight: 18, + yLabelWidth: 18, + + drawXAxis: true, + drawYAxis: true, + axisLineColor: "black", + axisLineWidth: 0.3, + gridLineWidth: 0.3, + axisLabelColor: "black", + axisLabelWidth: 50, + drawYGrid: true, + drawXGrid: true, + gridLineColor: "rgb(128,128,128)", + + interactionModel: null, // will be set to Dygraph.Interaction.defaultModel + animatedZooms: false, // (for now) + + // Range selector options + showRangeSelector: false, + rangeSelectorHeight: 40, + rangeSelectorPlotStrokeColor: "#808FAB", + rangeSelectorPlotFillColor: "#A7B1C4", + showInRangeSelector: null, + + // The ordering here ensures that central lines always appear above any + // fill bars/error bars. + plotter: [ + Dygraph.Plotters.fillPlotter, + Dygraph.Plotters.errorPlotter, + Dygraph.Plotters.linePlotter + ], + + plugins: [ ], + + // per-axis options + axes: { + x: { + pixelsPerLabel: 70, + axisLabelWidth: 60, + axisLabelFormatter: Dygraph.dateAxisLabelFormatter, + valueFormatter: Dygraph.dateValueFormatter, + drawGrid: true, + drawAxis: true, + independentTicks: true, + ticker: null // will be set in dygraph-tickers.js + }, + y: { + axisLabelWidth: 50, + pixelsPerLabel: 30, + valueFormatter: Dygraph.numberValueFormatter, + axisLabelFormatter: Dygraph.numberAxisLabelFormatter, + drawGrid: true, + drawAxis: true, + independentTicks: true, + ticker: null // will be set in dygraph-tickers.js + }, + y2: { + axisLabelWidth: 50, + pixelsPerLabel: 30, + valueFormatter: Dygraph.numberValueFormatter, + axisLabelFormatter: Dygraph.numberAxisLabelFormatter, + drawAxis: true, // only applies when there are two axes of data. + drawGrid: false, + independentTicks: false, + ticker: null // will be set in dygraph-tickers.js + } + } +}; + +// Directions for panning and zooming. Use bit operations when combined +// values are possible. +Dygraph.HORIZONTAL = 1; +Dygraph.VERTICAL = 2; + +// Installed plugins, in order of precedence (most-general to most-specific). +// Plugins are installed after they are defined, in plugins/install.js. +Dygraph.PLUGINS = [ +]; + +// Used for initializing annotation CSS rules only once. +Dygraph.addedAnnotationCSS = false; + +Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { + // Labels is no longer a constructor parameter, since it's typically set + // directly from the data source. It also conains a name for the x-axis, + // which the previous constructor form did not. + if (labels !== null) { + var new_labels = ["Date"]; + for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); + Dygraph.update(attrs, { 'labels': new_labels }); + } + this.__init__(div, file, attrs); +}; + +/** + * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit + * and context <canvas> inside of it. See the constructor for details. + * on the parameters. + * @param {Element} div the Element to render the graph into. + * @param {string | Function} file Source data + * @param {Object} attrs Miscellaneous other options + * @private + */ +Dygraph.prototype.__init__ = function(div, file, attrs) { + // Hack for IE: if we're using excanvas and the document hasn't finished + // loading yet (and hence may not have initialized whatever it needs to + // initialize), then keep calling this routine periodically until it has. + if (/MSIE/.test(navigator.userAgent) && !window.opera && + typeof(G_vmlCanvasManager) != 'undefined' && + document.readyState != 'complete') { + var self = this; + setTimeout(function() { self.__init__(div, file, attrs); }, 100); + return; + } + + // Support two-argument constructor + if (attrs === null || attrs === undefined) { attrs = {}; } + + attrs = Dygraph.mapLegacyOptions_(attrs); + + if (typeof(div) == 'string') { + div = document.getElementById(div); + } + + if (!div) { + console.error("Constructing dygraph with a non-existent div!"); + return; + } + + this.isUsingExcanvas_ = typeof(G_vmlCanvasManager) != 'undefined'; + + // Copy the important bits into the object + // TODO(danvk): most of these should just stay in the attrs_ dictionary. + this.maindiv_ = div; + this.file_ = file; + this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; + this.previousVerticalX_ = -1; + this.fractions_ = attrs.fractions || false; + this.dateWindow_ = attrs.dateWindow || null; + + this.annotations_ = []; + + // Zoomed indicators - These indicate when the graph has been zoomed and on what axis. + this.zoomed_x_ = false; + this.zoomed_y_ = false; + + // Clear the div. This ensure that, if multiple dygraphs are passed the same + // div, then only one will be drawn. + div.innerHTML = ""; + + // For historical reasons, the 'width' and 'height' options trump all CSS + // rules _except_ for an explicit 'width' or 'height' on the div. + // As an added convenience, if the div has zero height (like <div></div> does + // without any styles), then we use a default height/width. + if (div.style.width === '' && attrs.width) { + div.style.width = attrs.width + "px"; + } + if (div.style.height === '' && attrs.height) { + div.style.height = attrs.height + "px"; + } + if (div.style.height === '' && div.clientHeight === 0) { + div.style.height = Dygraph.DEFAULT_HEIGHT + "px"; + if (div.style.width === '') { + div.style.width = Dygraph.DEFAULT_WIDTH + "px"; + } + } + // These will be zero if the dygraph's div is hidden. In that case, + // use the user-specified attributes if present. If not, use zero + // and assume the user will call resize to fix things later. + this.width_ = div.clientWidth || attrs.width || 0; + this.height_ = div.clientHeight || attrs.height || 0; + + // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. + if (attrs.stackedGraph) { + attrs.fillGraph = true; + // TODO(nikhilk): Add any other stackedGraph checks here. + } + + // DEPRECATION WARNING: All option processing should be moved from + // attrs_ and user_attrs_ to options_, which holds all this information. + // + // Dygraphs has many options, some of which interact with one another. + // To keep track of everything, we maintain two sets of options: + // + // this.user_attrs_ only options explicitly set by the user. + // this.attrs_ defaults, options derived from user_attrs_, data. + // + // Options are then accessed this.attr_('attr'), which first looks at + // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent + // defaults without overriding behavior that the user specifically asks for. + this.user_attrs_ = {}; + Dygraph.update(this.user_attrs_, attrs); + + // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified. + this.attrs_ = {}; + Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS); + + this.boundaryIds_ = []; + this.setIndexByName_ = {}; + this.datasetIndex_ = []; + + this.registeredEvents_ = []; + this.eventListeners_ = {}; + + this.attributes_ = new DygraphOptions(this); + + // Create the containing DIV and other interactive elements + this.createInterface_(); + + // Activate plugins. + this.plugins_ = []; + var plugins = Dygraph.PLUGINS.concat(this.getOption('plugins')); + for (var i = 0; i < plugins.length; i++) { + // the plugins option may contain either plugin classes or instances. + // Plugin instances contain an activate method. + var Plugin = plugins[i]; // either a constructor or an instance. + var pluginInstance; + if (typeof(Plugin.activate) !== 'undefined') { + pluginInstance = Plugin; + } else { + pluginInstance = new Plugin(); + } + + var pluginDict = { + plugin: pluginInstance, + events: {}, + options: {}, + pluginOptions: {} + }; + + var handlers = pluginInstance.activate(this); + for (var eventName in handlers) { + if (!handlers.hasOwnProperty(eventName)) continue; + // TODO(danvk): validate eventName. + pluginDict.events[eventName] = handlers[eventName]; + } + + this.plugins_.push(pluginDict); + } + + // At this point, plugins can no longer register event handlers. + // Construct a map from event -> ordered list of [callback, plugin]. + for (var i = 0; i < this.plugins_.length; i++) { + var plugin_dict = this.plugins_[i]; + for (var eventName in plugin_dict.events) { + if (!plugin_dict.events.hasOwnProperty(eventName)) continue; + var callback = plugin_dict.events[eventName]; + + var pair = [plugin_dict.plugin, callback]; + if (!(eventName in this.eventListeners_)) { + this.eventListeners_[eventName] = [pair]; + } else { + this.eventListeners_[eventName].push(pair); + } + } + } + + this.createDragInterface_(); + + this.start_(); +}; + +/** + * Triggers a cascade of events to the various plugins which are interested in them. + * Returns true if the "default behavior" should be prevented, i.e. if one + * of the event listeners called event.preventDefault(). + * @private + */ +Dygraph.prototype.cascadeEvents_ = function(name, extra_props) { + if (!(name in this.eventListeners_)) return false; + + // QUESTION: can we use objects & prototypes to speed this up? + var e = { + dygraph: this, + cancelable: false, + defaultPrevented: false, + preventDefault: function() { + if (!e.cancelable) throw "Cannot call preventDefault on non-cancelable event."; + e.defaultPrevented = true; + }, + propagationStopped: false, + stopPropagation: function() { + e.propagationStopped = true; + } + }; + Dygraph.update(e, extra_props); + + var callback_plugin_pairs = this.eventListeners_[name]; + if (callback_plugin_pairs) { + for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) { + var plugin = callback_plugin_pairs[i][0]; + var callback = callback_plugin_pairs[i][1]; + callback.call(plugin, e); + if (e.propagationStopped) break; + } + } + return e.defaultPrevented; +}; + +/** + * Fetch a plugin instance of a particular class. Only for testing. + * @private + * @param {!Class} type The type of the plugin. + * @return {Object} Instance of the plugin, or null if there is none. + */ +Dygraph.prototype.getPluginInstance_ = function(type) { + for (var i = 0; i < this.plugins_.length; i++) { + var p = this.plugins_[i]; + if (p.plugin instanceof type) { + return p.plugin; + } + } + return null; +}; + +/** + * Returns the zoomed status of the chart for one or both axes. + * + * Axis is an optional parameter. Can be set to 'x' or 'y'. + * + * The zoomed status for an axis is set whenever a user zooms using the mouse + * or when the dateWindow or valueRange are updated (unless the + * isZoomedIgnoreProgrammaticZoom option is also specified). + */ +Dygraph.prototype.isZoomed = function(axis) { + if (axis === null || axis === undefined) { + return this.zoomed_x_ || this.zoomed_y_; + } + if (axis === 'x') return this.zoomed_x_; + if (axis === 'y') return this.zoomed_y_; + throw "axis parameter is [" + axis + "] must be null, 'x' or 'y'."; +}; + +/** + * Returns information about the Dygraph object, including its containing ID. + */ +Dygraph.prototype.toString = function() { + var maindiv = this.maindiv_; + var id = (maindiv && maindiv.id) ? maindiv.id : maindiv; + return "[Dygraph " + id + "]"; +}; + +/** + * @private + * Returns the value of an option. This may be set by the user (either in the + * constructor or by calling updateOptions) or by dygraphs, and may be set to a + * per-series value. + * @param {string} name The name of the option, e.g. 'rollPeriod'. + * @param {string} [seriesName] The name of the series to which the option + * will be applied. If no per-series value of this option is available, then + * the global value is returned. This is optional. + * @return { ... } The value of the option. + */ +Dygraph.prototype.attr_ = function(name, seriesName) { + if (DEBUG) { + if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') { + console.error('Must include options reference JS for testing'); + } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) { + console.error('Dygraphs is using property ' + name + ', which has no ' + + 'entry in the Dygraphs.OPTIONS_REFERENCE listing.'); + // Only log this error once. + Dygraph.OPTIONS_REFERENCE[name] = true; + } + } + return seriesName ? this.attributes_.getForSeries(name, seriesName) : this.attributes_.get(name); +}; + +/** + * Returns the current value for an option, as set in the constructor or via + * updateOptions. You may pass in an (optional) series name to get per-series + * values for the option. + * + * All values returned by this method should be considered immutable. If you + * modify them, there is no guarantee that the changes will be honored or that + * dygraphs will remain in a consistent state. If you want to modify an option, + * use updateOptions() instead. + * + * @param {string} name The name of the option (e.g. 'strokeWidth') + * @param {string=} opt_seriesName Series name to get per-series values. + * @return {*} The value of the option. + */ +Dygraph.prototype.getOption = function(name, opt_seriesName) { + return this.attr_(name, opt_seriesName); +}; + +/** + * Like getOption(), but specifically returns a number. + * This is a convenience function for working with the Closure Compiler. + * @param {string} name The name of the option (e.g. 'strokeWidth') + * @param {string=} opt_seriesName Series name to get per-series values. + * @return {number} The value of the option. + * @private + */ +Dygraph.prototype.getNumericOption = function(name, opt_seriesName) { + return /** @type{number} */(this.getOption(name, opt_seriesName)); +}; + +/** + * Like getOption(), but specifically returns a string. + * This is a convenience function for working with the Closure Compiler. + * @param {string} name The name of the option (e.g. 'strokeWidth') + * @param {string=} opt_seriesName Series name to get per-series values. + * @return {string} The value of the option. + * @private + */ +Dygraph.prototype.getStringOption = function(name, opt_seriesName) { + return /** @type{string} */(this.getOption(name, opt_seriesName)); +}; + +/** + * Like getOption(), but specifically returns a boolean. + * This is a convenience function for working with the Closure Compiler. + * @param {string} name The name of the option (e.g. 'strokeWidth') + * @param {string=} opt_seriesName Series name to get per-series values. + * @return {boolean} The value of the option. + * @private + */ +Dygraph.prototype.getBooleanOption = function(name, opt_seriesName) { + return /** @type{boolean} */(this.getOption(name, opt_seriesName)); +}; + +/** + * Like getOption(), but specifically returns a function. + * This is a convenience function for working with the Closure Compiler. + * @param {string} name The name of the option (e.g. 'strokeWidth') + * @param {string=} opt_seriesName Series name to get per-series values. + * @return {function(...)} The value of the option. + * @private + */ +Dygraph.prototype.getFunctionOption = function(name, opt_seriesName) { + return /** @type{function(...)} */(this.getOption(name, opt_seriesName)); +}; + +Dygraph.prototype.getOptionForAxis = function(name, axis) { + return this.attributes_.getForAxis(name, axis); +}; + +/** + * @private + * @param {string} axis The name of the axis (i.e. 'x', 'y' or 'y2') + * @return { ... } A function mapping string -> option value + */ +Dygraph.prototype.optionsViewForAxis_ = function(axis) { + var self = this; + return function(opt) { + var axis_opts = self.user_attrs_.axes; + if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) { + return axis_opts[axis][opt]; + } + + // I don't like that this is in a second spot. + if (axis === 'x' && opt === 'logscale') { + // return the default value. + // TODO(konigsberg): pull the default from a global default. + return false; + } + + // user-specified attributes always trump defaults, even if they're less + // specific. + if (typeof(self.user_attrs_[opt]) != 'undefined') { + return self.user_attrs_[opt]; + } + + axis_opts = self.attrs_.axes; + if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) { + return axis_opts[axis][opt]; + } + // check old-style axis options + // TODO(danvk): add a deprecation warning if either of these match. + if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) { + return self.axes_[0][opt]; + } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) { + return self.axes_[1][opt]; + } + return self.attr_(opt); + }; +}; + +/** + * Returns the current rolling period, as set by the user or an option. + * @return {number} The number of points in the rolling window + */ +Dygraph.prototype.rollPeriod = function() { + return this.rollPeriod_; +}; + +/** + * Returns the currently-visible x-range. This can be affected by zooming, + * panning or a call to updateOptions. + * Returns a two-element array: [left, right]. + * If the Dygraph has dates on the x-axis, these will be millis since epoch. + */ +Dygraph.prototype.xAxisRange = function() { + return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes(); +}; + +/** + * Returns the lower- and upper-bound x-axis values of the + * data set. + */ +Dygraph.prototype.xAxisExtremes = function() { + var pad = this.getNumericOption('xRangePad') / this.plotter_.area.w; + if (this.numRows() === 0) { + return [0 - pad, 1 + pad]; + } + var left = this.rawData_[0][0]; + var right = this.rawData_[this.rawData_.length - 1][0]; + if (pad) { + // Must keep this in sync with dygraph-layout _evaluateLimits() + var range = right - left; + left -= range * pad; + right += range * pad; + } + return [left, right]; +}; + +/** + * Returns the currently-visible y-range for an axis. This can be affected by + * zooming, panning or a call to updateOptions. Axis indices are zero-based. If + * called with no arguments, returns the range of the first axis. + * Returns a two-element array: [bottom, top]. + */ +Dygraph.prototype.yAxisRange = function(idx) { + if (typeof(idx) == "undefined") idx = 0; + if (idx < 0 || idx >= this.axes_.length) { + return null; + } + var axis = this.axes_[idx]; + return [ axis.computedValueRange[0], axis.computedValueRange[1] ]; +}; + +/** + * Returns the currently-visible y-ranges for each axis. This can be affected by + * zooming, panning, calls to updateOptions, etc. + * Returns an array of [bottom, top] pairs, one for each y-axis. + */ +Dygraph.prototype.yAxisRanges = function() { + var ret = []; + for (var i = 0; i < this.axes_.length; i++) { + ret.push(this.yAxisRange(i)); + } + return ret; +}; + +// TODO(danvk): use these functions throughout dygraphs. +/** + * Convert from data coordinates to canvas/div X/Y coordinates. + * If specified, do this conversion for the coordinate system of a particular + * axis. Uses the first axis by default. + * Returns a two-element array: [X, Y] + * + * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord + * instead of toDomCoords(null, y, axis). + */ +Dygraph.prototype.toDomCoords = function(x, y, axis) { + return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; +}; + +/** + * Convert from data x coordinates to canvas/div X coordinate. + * If specified, do this conversion for the coordinate system of a particular + * axis. + * Returns a single value or null if x is null. + */ +Dygraph.prototype.toDomXCoord = function(x) { + if (x === null) { + return null; + } + + var area = this.plotter_.area; + var xRange = this.xAxisRange(); + return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; +}; + +/** + * Convert from data x coordinates to canvas/div Y coordinate and optional + * axis. Uses the first axis by default. + * + * returns a single value or null if y is null. + */ +Dygraph.prototype.toDomYCoord = function(y, axis) { + var pct = this.toPercentYCoord(y, axis); + + if (pct === null) { + return null; + } + var area = this.plotter_.area; + return area.y + pct * area.h; +}; + +/** + * Convert from canvas/div coords to data coordinates. + * If specified, do this conversion for the coordinate system of a particular + * axis. Uses the first axis by default. + * Returns a two-element array: [X, Y]. + * + * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord + * instead of toDataCoords(null, y, axis). + */ +Dygraph.prototype.toDataCoords = function(x, y, axis) { + return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; +}; + +/** + * Convert from canvas/div x coordinate to data coordinate. + * + * If x is null, this returns null. + */ +Dygraph.prototype.toDataXCoord = function(x) { + if (x === null) { + return null; + } + + var area = this.plotter_.area; + var xRange = this.xAxisRange(); + + if (!this.attributes_.getForAxis("logscale", 'x')) { + return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); + } else { + // TODO: remove duplicate code? + // Computing the inverse of toDomCoord. + var pct = (x - area.x) / area.w; + + // Computing the inverse of toPercentXCoord. The function was arrived at with + // the following steps: + // + // Original calcuation: + // pct = (log(x) - log(xRange[0])) / (log(xRange[1]) - log(xRange[0]))); + // + // Multiply both sides by the right-side demoninator. + // pct * (log(xRange[1] - log(xRange[0]))) = log(x) - log(xRange[0]) + // + // add log(xRange[0]) to both sides + // log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) = log(x); + // + // Swap both sides of the equation, + // log(x) = log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) + // + // Use both sides as the exponent in 10^exp and we're done. + // x = 10 ^ (log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0]))) + var logr0 = Dygraph.log10(xRange[0]); + var logr1 = Dygraph.log10(xRange[1]); + var exponent = logr0 + (pct * (logr1 - logr0)); + var value = Math.pow(Dygraph.LOG_SCALE, exponent); + return value; + } +}; + +/** + * Convert from canvas/div y coord to value. + * + * If y is null, this returns null. + * if axis is null, this uses the first axis. + */ +Dygraph.prototype.toDataYCoord = function(y, axis) { + if (y === null) { + return null; + } + + var area = this.plotter_.area; + var yRange = this.yAxisRange(axis); + + if (typeof(axis) == "undefined") axis = 0; + if (!this.attributes_.getForAxis("logscale", axis)) { + return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]); + } else { + // Computing the inverse of toDomCoord. + var pct = (y - area.y) / area.h; + + // Computing the inverse of toPercentYCoord. The function was arrived at with + // the following steps: + // + // Original calcuation: + // pct = (log(yRange[1]) - log(y)) / (log(yRange[1]) - log(yRange[0])); + // + // Multiply both sides by the right-side demoninator. + // pct * (log(yRange[1]) - log(yRange[0])) = log(yRange[1]) - log(y); + // + // subtract log(yRange[1]) from both sides. + // (pct * (log(yRange[1]) - log(yRange[0]))) - log(yRange[1]) = -log(y); + // + // and multiply both sides by -1. + // log(yRange[1]) - (pct * (logr1 - log(yRange[0])) = log(y); + // + // Swap both sides of the equation, + // log(y) = log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0]))); + // + // Use both sides as the exponent in 10^exp and we're done. + // y = 10 ^ (log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0])))); + var logr0 = Dygraph.log10(yRange[0]); + var logr1 = Dygraph.log10(yRange[1]); + var exponent = logr1 - (pct * (logr1 - logr0)); + var value = Math.pow(Dygraph.LOG_SCALE, exponent); + return value; + } +}; + +/** + * Converts a y for an axis to a percentage from the top to the + * bottom of the drawing area. + * + * If the coordinate represents a value visible on the canvas, then + * the value will be between 0 and 1, where 0 is the top of the canvas. + * However, this method will return values outside the range, as + * values can fall outside the canvas. + * + * If y is null, this returns null. + * if axis is null, this uses the first axis. + * + * @param {number} y The data y-coordinate. + * @param {number} [axis] The axis number on which the data coordinate lives. + * @return {number} A fraction in [0, 1] where 0 = the top edge. + */ +Dygraph.prototype.toPercentYCoord = function(y, axis) { + if (y === null) { + return null; + } + if (typeof(axis) == "undefined") axis = 0; + + var yRange = this.yAxisRange(axis); + + var pct; + var logscale = this.attributes_.getForAxis("logscale", axis); + if (logscale) { + var logr0 = Dygraph.log10(yRange[0]); + var logr1 = Dygraph.log10(yRange[1]); + pct = (logr1 - Dygraph.log10(y)) / (logr1 - logr0); + } else { + // yRange[1] - y is unit distance from the bottom. + // yRange[1] - yRange[0] is the scale of the range. + // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. + pct = (yRange[1] - y) / (yRange[1] - yRange[0]); + } + return pct; +}; + +/** + * Converts an x value to a percentage from the left to the right of + * the drawing area. + * + * If the coordinate represents a value visible on the canvas, then + * the value will be between 0 and 1, where 0 is the left of the canvas. + * However, this method will return values outside the range, as + * values can fall outside the canvas. + * + * If x is null, this returns null. + * @param {number} x The data x-coordinate. + * @return {number} A fraction in [0, 1] where 0 = the left edge. + */ +Dygraph.prototype.toPercentXCoord = function(x) { + if (x === null) { + return null; + } + + var xRange = this.xAxisRange(); + var pct; + var logscale = this.attributes_.getForAxis("logscale", 'x') ; + if (logscale === true) { // logscale can be null so we test for true explicitly. + var logr0 = Dygraph.log10(xRange[0]); + var logr1 = Dygraph.log10(xRange[1]); + pct = (Dygraph.log10(x) - logr0) / (logr1 - logr0); + } else { + // x - xRange[0] is unit distance from the left. + // xRange[1] - xRange[0] is the scale of the range. + // The full expression below is the % from the left. + pct = (x - xRange[0]) / (xRange[1] - xRange[0]); + } + return pct; +}; + +/** + * Returns the number of columns (including the independent variable). + * @return {number} The number of columns. + */ +Dygraph.prototype.numColumns = function() { + if (!this.rawData_) return 0; + return this.rawData_[0] ? this.rawData_[0].length : this.attr_("labels").length; +}; + +/** + * Returns the number of rows (excluding any header/label row). + * @return {number} The number of rows, less any header. + */ +Dygraph.prototype.numRows = function() { + if (!this.rawData_) return 0; + return this.rawData_.length; +}; + +/** + * Returns the value in the given row and column. If the row and column exceed + * the bounds on the data, returns null. Also returns null if the value is + * missing. + * @param {number} row The row number of the data (0-based). Row 0 is the + * first row of data, not a header row. + * @param {number} col The column number of the data (0-based) + * @return {number} The value in the specified cell or null if the row/col + * were out of range. + */ +Dygraph.prototype.getValue = function(row, col) { + if (row < 0 || row > this.rawData_.length) return null; + if (col < 0 || col > this.rawData_[row].length) return null; + + return this.rawData_[row][col]; +}; + +/** + * Generates interface elements for the Dygraph: a containing div, a div to + * display the current point, and a textbox to adjust the rolling average + * period. Also creates the Renderer/Layout elements. + * @private + */ +Dygraph.prototype.createInterface_ = function() { + // Create the all-enclosing graph div + var enclosing = this.maindiv_; + + this.graphDiv = document.createElement("div"); + + // TODO(danvk): any other styles that are useful to set here? + this.graphDiv.style.textAlign = 'left'; // This is a CSS "reset" + this.graphDiv.style.position = 'relative'; + enclosing.appendChild(this.graphDiv); + + // Create the canvas for interactive parts of the chart. + this.canvas_ = Dygraph.createCanvas(); + this.canvas_.style.position = "absolute"; + + // ... and for static parts of the chart. + this.hidden_ = this.createPlotKitCanvas_(this.canvas_); + + this.canvas_ctx_ = Dygraph.getContext(this.canvas_); + this.hidden_ctx_ = Dygraph.getContext(this.hidden_); + + this.resizeElements_(); + + // The interactive parts of the graph are drawn on top of the chart. + this.graphDiv.appendChild(this.hidden_); + this.graphDiv.appendChild(this.canvas_); + this.mouseEventElement_ = this.createMouseEventElement_(); + + // Create the grapher + this.layout_ = new DygraphLayout(this); + + var dygraph = this; + + this.mouseMoveHandler_ = function(e) { + dygraph.mouseMove_(e); + }; + + this.mouseOutHandler_ = function(e) { + // The mouse has left the chart if: + // 1. e.target is inside the chart + // 2. e.relatedTarget is outside the chart + var target = e.target || e.fromElement; + var relatedTarget = e.relatedTarget || e.toElement; + if (Dygraph.isNodeContainedBy(target, dygraph.graphDiv) && + !Dygraph.isNodeContainedBy(relatedTarget, dygraph.graphDiv)) { + dygraph.mouseOut_(e); + } + }; + + this.addAndTrackEvent(window, 'mouseout', this.mouseOutHandler_); + this.addAndTrackEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_); + + // Don't recreate and register the resize handler on subsequent calls. + // This happens when the graph is resized. + if (!this.resizeHandler_) { + this.resizeHandler_ = function(e) { + dygraph.resize(); + }; + + // Update when the window is resized. + // TODO(danvk): drop frames depending on complexity of the chart. + this.addAndTrackEvent(window, 'resize', this.resizeHandler_); + } +}; + +Dygraph.prototype.resizeElements_ = function() { + this.graphDiv.style.width = this.width_ + "px"; + this.graphDiv.style.height = this.height_ + "px"; + + var canvasScale = Dygraph.getContextPixelRatio(this.canvas_ctx_); + this.canvas_.width = this.width_ * canvasScale; + this.canvas_.height = this.height_ * canvasScale; + this.canvas_.style.width = this.width_ + "px"; // for IE + this.canvas_.style.height = this.height_ + "px"; // for IE + if (canvasScale !== 1) { + this.canvas_ctx_.scale(canvasScale, canvasScale); + } + + var hiddenScale = Dygraph.getContextPixelRatio(this.hidden_ctx_); + this.hidden_.width = this.width_ * hiddenScale; + this.hidden_.height = this.height_ * hiddenScale; + this.hidden_.style.width = this.width_ + "px"; // for IE + this.hidden_.style.height = this.height_ + "px"; // for IE + if (hiddenScale !== 1) { + this.hidden_ctx_.scale(hiddenScale, hiddenScale); + } +}; + +/** + * Detach DOM elements in the dygraph and null out all data references. + * Calling this when you're done with a dygraph can dramatically reduce memory + * usage. See, e.g., the tests/perf.html example. + */ +Dygraph.prototype.destroy = function() { + this.canvas_ctx_.restore(); + this.hidden_ctx_.restore(); + + // Destroy any plugins, in the reverse order that they were registered. + for (var i = this.plugins_.length - 1; i >= 0; i--) { + var p = this.plugins_.pop(); + if (p.plugin.destroy) p.plugin.destroy(); + } + + var removeRecursive = function(node) { + while (node.hasChildNodes()) { + removeRecursive(node.firstChild); + node.removeChild(node.firstChild); + } + }; + + this.removeTrackedEvents_(); + + // remove mouse event handlers (This may not be necessary anymore) + Dygraph.removeEvent(window, 'mouseout', this.mouseOutHandler_); + Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_); + + // remove window handlers + Dygraph.removeEvent(window,'resize', this.resizeHandler_); + this.resizeHandler_ = null; + + removeRecursive(this.maindiv_); + + var nullOut = function(obj) { + for (var n in obj) { + if (typeof(obj[n]) === 'object') { + obj[n] = null; + } + } + }; + // These may not all be necessary, but it can't hurt... + nullOut(this.layout_); + nullOut(this.plotter_); + nullOut(this); +}; + +/** + * Creates the canvas on which the chart will be drawn. Only the Renderer ever + * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots + * or the zoom rectangles) is done on this.canvas_. + * @param {Object} canvas The Dygraph canvas over which to overlay the plot + * @return {Object} The newly-created canvas + * @private + */ +Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { + var h = Dygraph.createCanvas(); + h.style.position = "absolute"; + // TODO(danvk): h should be offset from canvas. canvas needs to include + // some extra area to make it easier to zoom in on the far left and far + // right. h needs to be precisely the plot area, so that clipping occurs. + h.style.top = canvas.style.top; + h.style.left = canvas.style.left; + h.width = this.width_; + h.height = this.height_; + h.style.width = this.width_ + "px"; // for IE + h.style.height = this.height_ + "px"; // for IE + return h; +}; + +/** + * Creates an overlay element used to handle mouse events. + * @return {Object} The mouse event element. + * @private + */ +Dygraph.prototype.createMouseEventElement_ = function() { + if (this.isUsingExcanvas_) { + var elem = document.createElement("div"); + elem.style.position = 'absolute'; + elem.style.backgroundColor = 'white'; + elem.style.filter = 'alpha(opacity=0)'; + elem.style.width = this.width_ + "px"; + elem.style.height = this.height_ + "px"; + this.graphDiv.appendChild(elem); + return elem; + } else { + return this.canvas_; + } +}; + +/** + * Generate a set of distinct colors for the data series. This is done with a + * color wheel. Saturation/Value are customizable, and the hue is + * equally-spaced around the color wheel. If a custom set of colors is + * specified, that is used instead. + * @private + */ +Dygraph.prototype.setColors_ = function() { + var labels = this.getLabels(); + var num = labels.length - 1; + this.colors_ = []; + this.colorsMap_ = {}; + + // These are used for when no custom colors are specified. + var sat = this.getNumericOption('colorSaturation') || 1.0; + var val = this.getNumericOption('colorValue') || 0.5; + var half = Math.ceil(num / 2); + + var colors = this.getOption('colors'); + var visibility = this.visibility(); + for (var i = 0; i < num; i++) { + if (!visibility[i]) { + continue; + } + var label = labels[i + 1]; + var colorStr = this.attributes_.getForSeries('color', label); + if (!colorStr) { + if (colors) { + colorStr = colors[i % colors.length]; + } else { + // alternate colors for high contrast. + var idx = i % 2 ? (half + (i + 1)/ 2) : Math.ceil((i + 1) / 2); + var hue = (1.0 * idx / (1 + num)); + colorStr = Dygraph.hsvToRGB(hue, sat, val); + } + } + this.colors_.push(colorStr); + this.colorsMap_[label] = colorStr; + } +}; + +/** + * Return the list of colors. This is either the list of colors passed in the + * attributes or the autogenerated list of rgb(r,g,b) strings. + * This does not return colors for invisible series. + * @return {Array.<string>} The list of colors. + */ +Dygraph.prototype.getColors = function() { + return this.colors_; +}; + +/** + * Returns a few attributes of a series, i.e. its color, its visibility, which + * axis it's assigned to, and its column in the original data. + * Returns null if the series does not exist. + * Otherwise, returns an object with column, visibility, color and axis properties. + * The "axis" property will be set to 1 for y1 and 2 for y2. + * The "column" property can be fed back into getValue(row, column) to get + * values for this series. + */ +Dygraph.prototype.getPropertiesForSeries = function(series_name) { + var idx = -1; + var labels = this.getLabels(); + for (var i = 1; i < labels.length; i++) { + if (labels[i] == series_name) { + idx = i; + break; + } + } + if (idx == -1) return null; + + return { + name: series_name, + column: idx, + visible: this.visibility()[idx - 1], + color: this.colorsMap_[series_name], + axis: 1 + this.attributes_.axisForSeries(series_name) + }; +}; + +/** + * Create the text box to adjust the averaging period + * @private + */ +Dygraph.prototype.createRollInterface_ = function() { + // Create a roller if one doesn't exist already. + if (!this.roller_) { + this.roller_ = document.createElement("input"); + this.roller_.type = "text"; + this.roller_.style.display = "none"; + this.graphDiv.appendChild(this.roller_); + } + + var display = this.getBooleanOption('showRoller') ? 'block' : 'none'; + + var area = this.plotter_.area; + var textAttr = { "position": "absolute", + "zIndex": 10, + "top": (area.y + area.h - 25) + "px", + "left": (area.x + 1) + "px", + "display": display + }; + this.roller_.size = "2"; + this.roller_.value = this.rollPeriod_; + for (var name in textAttr) { + if (textAttr.hasOwnProperty(name)) { + this.roller_.style[name] = textAttr[name]; + } + } + + var dygraph = this; + this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; +}; + +/** + * Set up all the mouse handlers needed to capture dragging behavior for zoom + * events. + * @private + */ +Dygraph.prototype.createDragInterface_ = function() { + var context = { + // Tracks whether the mouse is down right now + isZooming: false, + isPanning: false, // is this drag part of a pan? + is2DPan: false, // if so, is that pan 1- or 2-dimensional? + dragStartX: null, // pixel coordinates + dragStartY: null, // pixel coordinates + dragEndX: null, // pixel coordinates + dragEndY: null, // pixel coordinates + dragDirection: null, + prevEndX: null, // pixel coordinates + prevEndY: null, // pixel coordinates + prevDragDirection: null, + cancelNextDblclick: false, // see comment in dygraph-interaction-model.js + + // The value on the left side of the graph when a pan operation starts. + initialLeftmostDate: null, + + // The number of units each pixel spans. (This won't be valid for log + // scales) + xUnitsPerPixel: null, + + // TODO(danvk): update this comment + // The range in second/value units that the viewport encompasses during a + // panning operation. + dateRange: null, + + // Top-left corner of the canvas, in DOM coords + // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY. + px: 0, + py: 0, + + // Values for use with panEdgeFraction, which limit how far outside the + // graph's data boundaries it can be panned. + boundedDates: null, // [minDate, maxDate] + boundedValues: null, // [[minValue, maxValue] ...] + + // We cover iframes during mouse interactions. See comments in + // dygraph-utils.js for more info on why this is a good idea. + tarp: new Dygraph.IFrameTarp(), + + // contextB is the same thing as this context object but renamed. + initializeMouseDown: function(event, g, contextB) { + // prevents mouse drags from selecting page text. + if (event.preventDefault) { + event.preventDefault(); // Firefox, Chrome, etc. + } else { + event.returnValue = false; // IE + event.cancelBubble = true; + } + + var canvasPos = Dygraph.findPos(g.canvas_); + contextB.px = canvasPos.x; + contextB.py = canvasPos.y; + contextB.dragStartX = Dygraph.dragGetX_(event, contextB); + contextB.dragStartY = Dygraph.dragGetY_(event, contextB); + contextB.cancelNextDblclick = false; + contextB.tarp.cover(); + }, + destroy: function() { + var context = this; + if (context.isZooming || context.isPanning) { + context.isZooming = false; + context.dragStartX = null; + context.dragStartY = null; + } + + if (context.isPanning) { + context.isPanning = false; + context.draggingDate = null; + context.dateRange = null; + for (var i = 0; i < self.axes_.length; i++) { + delete self.axes_[i].draggingValue; + delete self.axes_[i].dragValueRange; + } + } + + context.tarp.uncover(); + } + }; + + var interactionModel = this.getOption("interactionModel"); + + // Self is the graph. + var self = this; + + // Function that binds the graph and context to the handler. + var bindHandler = function(handler) { + return function(event) { + handler(event, self, context); + }; + }; + + for (var eventName in interactionModel) { + if (!interactionModel.hasOwnProperty(eventName)) continue; + this.addAndTrackEvent(this.mouseEventElement_, eventName, + bindHandler(interactionModel[eventName])); + } + + // If the user releases the mouse button during a drag, but not over the + // canvas, then it doesn't count as a zooming action. + if (!interactionModel.willDestroyContextMyself) { + var mouseUpHandler = function(event) { + context.destroy(); + }; + + this.addAndTrackEvent(document, 'mouseup', mouseUpHandler); + } +}; + +/** + * Draw a gray zoom rectangle over the desired area of the canvas. Also clears + * up any previous zoom rectangles that were drawn. This could be optimized to + * avoid extra redrawing, but it's tricky to avoid interactions with the status + * dots. + * + * @param {number} direction the direction of the zoom rectangle. Acceptable + * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. + * @param {number} startX The X position where the drag started, in canvas + * coordinates. + * @param {number} endX The current X position of the drag, in canvas coords. + * @param {number} startY The Y position where the drag started, in canvas + * coordinates. + * @param {number} endY The current Y position of the drag, in canvas coords. + * @param {number} prevDirection the value of direction on the previous call to + * this function. Used to avoid excess redrawing + * @param {number} prevEndX The value of endX on the previous call to this + * function. Used to avoid excess redrawing + * @param {number} prevEndY The value of endY on the previous call to this + * function. Used to avoid excess redrawing + * @private + */ +Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, + endY, prevDirection, prevEndX, + prevEndY) { + var ctx = this.canvas_ctx_; + + // Clean up from the previous rect if necessary + if (prevDirection == Dygraph.HORIZONTAL) { + ctx.clearRect(Math.min(startX, prevEndX), this.layout_.getPlotArea().y, + Math.abs(startX - prevEndX), this.layout_.getPlotArea().h); + } else if (prevDirection == Dygraph.VERTICAL) { + ctx.clearRect(this.layout_.getPlotArea().x, Math.min(startY, prevEndY), + this.layout_.getPlotArea().w, Math.abs(startY - prevEndY)); + } + + // Draw a light-grey rectangle to show the new viewing area + if (direction == Dygraph.HORIZONTAL) { + if (endX && startX) { + ctx.fillStyle = "rgba(128,128,128,0.33)"; + ctx.fillRect(Math.min(startX, endX), this.layout_.getPlotArea().y, + Math.abs(endX - startX), this.layout_.getPlotArea().h); + } + } else if (direction == Dygraph.VERTICAL) { + if (endY && startY) { + ctx.fillStyle = "rgba(128,128,128,0.33)"; + ctx.fillRect(this.layout_.getPlotArea().x, Math.min(startY, endY), + this.layout_.getPlotArea().w, Math.abs(endY - startY)); + } + } + + if (this.isUsingExcanvas_) { + this.currentZoomRectArgs_ = [direction, startX, endX, startY, endY, 0, 0, 0]; + } +}; + +/** + * Clear the zoom rectangle (and perform no zoom). + * @private + */ +Dygraph.prototype.clearZoomRect_ = function() { + this.currentZoomRectArgs_ = null; + this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); +}; + +/** + * Zoom to something containing [lowX, highX]. These are pixel coordinates in + * the canvas. The exact zoom window may be slightly larger if there are no data + * points near lowX or highX. Don't confuse this function with doZoomXDates, + * which accepts dates that match the raw data. This function redraws the graph. + * + * @param {number} lowX The leftmost pixel value that should be visible. + * @param {number} highX The rightmost pixel value that should be visible. + * @private + */ +Dygraph.prototype.doZoomX_ = function(lowX, highX) { + this.currentZoomRectArgs_ = null; + // Find the earliest and latest dates contained in this canvasx range. + // Convert the call to date ranges of the raw data. + var minDate = this.toDataXCoord(lowX); + var maxDate = this.toDataXCoord(highX); + this.doZoomXDates_(minDate, maxDate); +}; + +/** + * Zoom to something containing [minDate, maxDate] values. Don't confuse this + * method with doZoomX which accepts pixel coordinates. This function redraws + * the graph. + * + * @param {number} minDate The minimum date that should be visible. + * @param {number} maxDate The maximum date that should be visible. + * @private + */ +Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { + // TODO(danvk): when xAxisRange is null (i.e. "fit to data", the animation + // can produce strange effects. Rather than the x-axis transitioning slowly + // between values, it can jerk around.) + var old_window = this.xAxisRange(); + var new_window = [minDate, maxDate]; + this.zoomed_x_ = true; + var that = this; + this.doAnimatedZoom(old_window, new_window, null, null, function() { + if (that.getFunctionOption("zoomCallback")) { + that.getFunctionOption("zoomCallback").call(that, + minDate, maxDate, that.yAxisRanges()); + } + }); +}; + +/** + * Zoom to something containing [lowY, highY]. These are pixel coordinates in + * the canvas. This function redraws the graph. + * + * @param {number} lowY The topmost pixel value that should be visible. + * @param {number} highY The lowest pixel value that should be visible. + * @private + */ +Dygraph.prototype.doZoomY_ = function(lowY, highY) { + this.currentZoomRectArgs_ = null; + // Find the highest and lowest values in pixel range for each axis. + // Note that lowY (in pixels) corresponds to the max Value (in data coords). + // This is because pixels increase as you go down on the screen, whereas data + // coordinates increase as you go up the screen. + var oldValueRanges = this.yAxisRanges(); + var newValueRanges = []; + for (var i = 0; i < this.axes_.length; i++) { + var hi = this.toDataYCoord(lowY, i); + var low = this.toDataYCoord(highY, i); + newValueRanges.push([low, hi]); + } + + this.zoomed_y_ = true; + var that = this; + this.doAnimatedZoom(null, null, oldValueRanges, newValueRanges, function() { + if (that.getFunctionOption("zoomCallback")) { + var xRange = that.xAxisRange(); + that.getFunctionOption("zoomCallback").call(that, + xRange[0], xRange[1], that.yAxisRanges()); + } + }); +}; + +/** + * Transition function to use in animations. Returns values between 0.0 + * (totally old values) and 1.0 (totally new values) for each frame. + * @private + */ +Dygraph.zoomAnimationFunction = function(frame, numFrames) { + var k = 1.5; + return (1.0 - Math.pow(k, -frame)) / (1.0 - Math.pow(k, -numFrames)); +}; + +/** + * Reset the zoom to the original view coordinates. This is the same as + * double-clicking on the graph. + */ +Dygraph.prototype.resetZoom = function() { + var dirty = false, dirtyX = false, dirtyY = false; + if (this.dateWindow_ !== null) { + dirty = true; + dirtyX = true; + } + + for (var i = 0; i < this.axes_.length; i++) { + if (typeof(this.axes_[i].valueWindow) !== 'undefined' && this.axes_[i].valueWindow !== null) { + dirty = true; + dirtyY = true; + } + } + + // Clear any selection, since it's likely to be drawn in the wrong place. + this.clearSelection(); + + if (dirty) { + this.zoomed_x_ = false; + this.zoomed_y_ = false; + + var minDate = this.rawData_[0][0]; + var maxDate = this.rawData_[this.rawData_.length - 1][0]; + + // With only one frame, don't bother calculating extreme ranges. + // TODO(danvk): merge this block w/ the code below. + if (!this.getBooleanOption("animatedZooms")) { + this.dateWindow_ = null; + for (i = 0; i < this.axes_.length; i++) { + if (this.axes_[i].valueWindow !== null) { + delete this.axes_[i].valueWindow; + } + } + this.drawGraph_(); + if (this.getFunctionOption("zoomCallback")) { + this.getFunctionOption("zoomCallback").call(this, + minDate, maxDate, this.yAxisRanges()); + } + return; + } + + var oldWindow=null, newWindow=null, oldValueRanges=null, newValueRanges=null; + if (dirtyX) { + oldWindow = this.xAxisRange(); + newWindow = [minDate, maxDate]; + } + + if (dirtyY) { + oldValueRanges = this.yAxisRanges(); + // TODO(danvk): this is pretty inefficient + var packed = this.gatherDatasets_(this.rolledSeries_, null); + var extremes = packed.extremes; + + // this has the side-effect of modifying this.axes_. + // this doesn't make much sense in this context, but it's convenient (we + // need this.axes_[*].extremeValues) and not harmful since we'll be + // calling drawGraph_ shortly, which clobbers these values. + this.computeYAxisRanges_(extremes); + + newValueRanges = []; + for (i = 0; i < this.axes_.length; i++) { + var axis = this.axes_[i]; + newValueRanges.push((axis.valueRange !== null && + axis.valueRange !== undefined) ? + axis.valueRange : axis.extremeRange); + } + } + + var that = this; + this.doAnimatedZoom(oldWindow, newWindow, oldValueRanges, newValueRanges, + function() { + that.dateWindow_ = null; + for (var i = 0; i < that.axes_.length; i++) { + if (that.axes_[i].valueWindow !== null) { + delete that.axes_[i].valueWindow; + } + } + if (that.getFunctionOption("zoomCallback")) { + that.getFunctionOption("zoomCallback").call(that, + minDate, maxDate, that.yAxisRanges()); + } + }); + } +}; + +/** + * Combined animation logic for all zoom functions. + * either the x parameters or y parameters may be null. + * @private + */ +Dygraph.prototype.doAnimatedZoom = function(oldXRange, newXRange, oldYRanges, newYRanges, callback) { + var steps = this.getBooleanOption("animatedZooms") ? + Dygraph.ANIMATION_STEPS : 1; + + var windows = []; + var valueRanges = []; + var step, frac; + + if (oldXRange !== null && newXRange !== null) { + for (step = 1; step <= steps; step++) { + frac = Dygraph.zoomAnimationFunction(step, steps); + windows[step-1] = [oldXRange[0]*(1-frac) + frac*newXRange[0], + oldXRange[1]*(1-frac) + frac*newXRange[1]]; + } + } + + if (oldYRanges !== null && newYRanges !== null) { + for (step = 1; step <= steps; step++) { + frac = Dygraph.zoomAnimationFunction(step, steps); + var thisRange = []; + for (var j = 0; j < this.axes_.length; j++) { + thisRange.push([oldYRanges[j][0]*(1-frac) + frac*newYRanges[j][0], + oldYRanges[j][1]*(1-frac) + frac*newYRanges[j][1]]); + } + valueRanges[step-1] = thisRange; + } + } + + var that = this; + Dygraph.repeatAndCleanup(function(step) { + if (valueRanges.length) { + for (var i = 0; i < that.axes_.length; i++) { + var w = valueRanges[step][i]; + that.axes_[i].valueWindow = [w[0], w[1]]; + } + } + if (windows.length) { + that.dateWindow_ = windows[step]; + } + that.drawGraph_(); + }, steps, Dygraph.ANIMATION_DURATION / steps, callback); +}; + +/** + * Get the current graph's area object. + * + * Returns: {x, y, w, h} + */ +Dygraph.prototype.getArea = function() { + return this.plotter_.area; +}; + +/** + * Convert a mouse event to DOM coordinates relative to the graph origin. + * + * Returns a two-element array: [X, Y]. + */ +Dygraph.prototype.eventToDomCoords = function(event) { + if (event.offsetX && event.offsetY) { + return [ event.offsetX, event.offsetY ]; + } else { + var eventElementPos = Dygraph.findPos(this.mouseEventElement_); + var canvasx = Dygraph.pageX(event) - eventElementPos.x; + var canvasy = Dygraph.pageY(event) - eventElementPos.y; + return [canvasx, canvasy]; + } +}; + +/** + * Given a canvas X coordinate, find the closest row. + * @param {number} domX graph-relative DOM X coordinate + * Returns {number} row number. + * @private + */ +Dygraph.prototype.findClosestRow = function(domX) { + var minDistX = Infinity; + var closestRow = -1; + var sets = this.layout_.points; + for (var i = 0; i < sets.length; i++) { + var points = sets[i]; + var len = points.length; + for (var j = 0; j < len; j++) { + var point = points[j]; + if (!Dygraph.isValidPoint(point, true)) continue; + var dist = Math.abs(point.canvasx - domX); + if (dist < minDistX) { + minDistX = dist; + closestRow = point.idx; + } + } + } + + return closestRow; +}; + +/** + * Given canvas X,Y coordinates, find the closest point. + * + * This finds the individual data point across all visible series + * that's closest to the supplied DOM coordinates using the standard + * Euclidean X,Y distance. + * + * @param {number} domX graph-relative DOM X coordinate + * @param {number} domY graph-relative DOM Y coordinate + * Returns: {row, seriesName, point} + * @private + */ +Dygraph.prototype.findClosestPoint = function(domX, domY) { + var minDist = Infinity; + var dist, dx, dy, point, closestPoint, closestSeries, closestRow; + for ( var setIdx = this.layout_.points.length - 1 ; setIdx >= 0 ; --setIdx ) { + var points = this.layout_.points[setIdx]; + for (var i = 0; i < points.length; ++i) { + point = points[i]; + if (!Dygraph.isValidPoint(point)) continue; + dx = point.canvasx - domX; + dy = point.canvasy - domY; + dist = dx * dx + dy * dy; + if (dist < minDist) { + minDist = dist; + closestPoint = point; + closestSeries = setIdx; + closestRow = point.idx; + } + } + } + var name = this.layout_.setNames[closestSeries]; + return { + row: closestRow, + seriesName: name, + point: closestPoint + }; +}; + +/** + * Given canvas X,Y coordinates, find the touched area in a stacked graph. + * + * This first finds the X data point closest to the supplied DOM X coordinate, + * then finds the series which puts the Y coordinate on top of its filled area, + * using linear interpolation between adjacent point pairs. + * + * @param {number} domX graph-relative DOM X coordinate + * @param {number} domY graph-relative DOM Y coordinate + * Returns: {row, seriesName, point} + * @private + */ +Dygraph.prototype.findStackedPoint = function(domX, domY) { + var row = this.findClosestRow(domX); + var closestPoint, closestSeries; + for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) { + var boundary = this.getLeftBoundary_(setIdx); + var rowIdx = row - boundary; + var points = this.layout_.points[setIdx]; + if (rowIdx >= points.length) continue; + var p1 = points[rowIdx]; + if (!Dygraph.isValidPoint(p1)) continue; + var py = p1.canvasy; + if (domX > p1.canvasx && rowIdx + 1 < points.length) { + // interpolate series Y value using next point + var p2 = points[rowIdx + 1]; + if (Dygraph.isValidPoint(p2)) { + var dx = p2.canvasx - p1.canvasx; + if (dx > 0) { + var r = (domX - p1.canvasx) / dx; + py += r * (p2.canvasy - p1.canvasy); + } + } + } else if (domX < p1.canvasx && rowIdx > 0) { + // interpolate series Y value using previous point + var p0 = points[rowIdx - 1]; + if (Dygraph.isValidPoint(p0)) { + var dx = p1.canvasx - p0.canvasx; + if (dx > 0) { + var r = (p1.canvasx - domX) / dx; + py += r * (p0.canvasy - p1.canvasy); + } + } + } + // Stop if the point (domX, py) is above this series' upper edge + if (setIdx === 0 || py < domY) { + closestPoint = p1; + closestSeries = setIdx; + } + } + var name = this.layout_.setNames[closestSeries]; + return { + row: row, + seriesName: name, + point: closestPoint + }; +}; + +/** + * When the mouse moves in the canvas, display information about a nearby data + * point and draw dots over those points in the data series. This function + * takes care of cleanup of previously-drawn dots. + * @param {Object} event The mousemove event from the browser. + * @private + */ +Dygraph.prototype.mouseMove_ = function(event) { + // This prevents JS errors when mousing over the canvas before data loads. + var points = this.layout_.points; + if (points === undefined || points === null) return; + + var canvasCoords = this.eventToDomCoords(event); + var canvasx = canvasCoords[0]; + var canvasy = canvasCoords[1]; + + var highlightSeriesOpts = this.getOption("highlightSeriesOpts"); + var selectionChanged = false; + if (highlightSeriesOpts && !this.isSeriesLocked()) { + var closest; + if (this.getBooleanOption("stackedGraph")) { + closest = this.findStackedPoint(canvasx, canvasy); + } else { + closest = this.findClosestPoint(canvasx, canvasy); + } + selectionChanged = this.setSelection(closest.row, closest.seriesName); + } else { + var idx = this.findClosestRow(canvasx); + selectionChanged = this.setSelection(idx); + } + + var callback = this.getFunctionOption("highlightCallback"); + if (callback && selectionChanged) { + callback.call(this, event, + this.lastx_, + this.selPoints_, + this.lastRow_, + this.highlightSet_); + } +}; + +/** + * Fetch left offset from the specified set index or if not passed, the + * first defined boundaryIds record (see bug #236). + * @private + */ +Dygraph.prototype.getLeftBoundary_ = function(setIdx) { + if (this.boundaryIds_[setIdx]) { + return this.boundaryIds_[setIdx][0]; + } else { + for (var i = 0; i < this.boundaryIds_.length; i++) { + if (this.boundaryIds_[i] !== undefined) { + return this.boundaryIds_[i][0]; + } + } + return 0; + } +}; + +Dygraph.prototype.animateSelection_ = function(direction) { + var totalSteps = 10; + var millis = 30; + if (this.fadeLevel === undefined) this.fadeLevel = 0; + if (this.animateId === undefined) this.animateId = 0; + var start = this.fadeLevel; + var steps = direction < 0 ? start : totalSteps - start; + if (steps <= 0) { + if (this.fadeLevel) { + this.updateSelection_(1.0); + } + return; + } + + var thisId = ++this.animateId; + var that = this; + Dygraph.repeatAndCleanup( + function(n) { + // ignore simultaneous animations + if (that.animateId != thisId) return; + + that.fadeLevel += direction; + if (that.fadeLevel === 0) { + that.clearSelection(); + } else { + that.updateSelection_(that.fadeLevel / totalSteps); + } + }, + steps, millis, function() {}); +}; + +/** + * Draw dots over the selectied points in the data series. This function + * takes care of cleanup of previously-drawn dots. + * @private + */ +Dygraph.prototype.updateSelection_ = function(opt_animFraction) { + /*var defaultPrevented = */ + this.cascadeEvents_('select', { + selectedX: this.lastx_, + selectedPoints: this.selPoints_ + }); + // TODO(danvk): use defaultPrevented here? + + // Clear the previously drawn vertical, if there is one + var i; + var ctx = this.canvas_ctx_; + if (this.getOption('highlightSeriesOpts')) { + ctx.clearRect(0, 0, this.width_, this.height_); + var alpha = 1.0 - this.getNumericOption('highlightSeriesBackgroundAlpha'); + if (alpha) { + // Activating background fade includes an animation effect for a gradual + // fade. TODO(klausw): make this independently configurable if it causes + // issues? Use a shared preference to control animations? + var animateBackgroundFade = true; + if (animateBackgroundFade) { + if (opt_animFraction === undefined) { + // start a new animation + this.animateSelection_(1); + return; + } + alpha *= opt_animFraction; + } + ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')'; + ctx.fillRect(0, 0, this.width_, this.height_); + } + + // Redraw only the highlighted series in the interactive canvas (not the + // static plot canvas, which is where series are usually drawn). + this.plotter_._renderLineChart(this.highlightSet_, ctx); + } else if (this.previousVerticalX_ >= 0) { + // Determine the maximum highlight circle size. + var maxCircleSize = 0; + var labels = this.attr_('labels'); + for (i = 1; i < labels.length; i++) { + var r = this.getNumericOption('highlightCircleSize', labels[i]); + if (r > maxCircleSize) maxCircleSize = r; + } + var px = this.previousVerticalX_; + ctx.clearRect(px - maxCircleSize - 1, 0, + 2 * maxCircleSize + 2, this.height_); + } + + if (this.isUsingExcanvas_ && this.currentZoomRectArgs_) { + Dygraph.prototype.drawZoomRect_.apply(this, this.currentZoomRectArgs_); + } + + if (this.selPoints_.length > 0) { + // Draw colored circles over the center of each selected point + var canvasx = this.selPoints_[0].canvasx; + ctx.save(); + for (i = 0; i < this.selPoints_.length; i++) { + var pt = this.selPoints_[i]; + if (!Dygraph.isOK(pt.canvasy)) continue; + + var circleSize = this.getNumericOption('highlightCircleSize', pt.name); + var callback = this.getFunctionOption("drawHighlightPointCallback", pt.name); + var color = this.plotter_.colors[pt.name]; + if (!callback) { + callback = Dygraph.Circles.DEFAULT; + } + ctx.lineWidth = this.getNumericOption('strokeWidth', pt.name); + ctx.strokeStyle = color; + ctx.fillStyle = color; + callback.call(this, this, pt.name, ctx, canvasx, pt.canvasy, + color, circleSize, pt.idx); + } + ctx.restore(); + + this.previousVerticalX_ = canvasx; + } +}; + +/** + * Manually set the selected points and display information about them in the + * legend. The selection can be cleared using clearSelection() and queried + * using getSelection(). + * @param {number} row Row number that should be highlighted (i.e. appear with + * hover dots on the chart). + * @param {seriesName} optional series name to highlight that series with the + * the highlightSeriesOpts setting. + * @param { locked } optional If true, keep seriesName selected when mousing + * over the graph, disabling closest-series highlighting. Call clearSelection() + * to unlock it. + */ +Dygraph.prototype.setSelection = function(row, opt_seriesName, opt_locked) { + // Extract the points we've selected + this.selPoints_ = []; + + var changed = false; + if (row !== false && row >= 0) { + if (row != this.lastRow_) changed = true; + this.lastRow_ = row; + for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) { + var points = this.layout_.points[setIdx]; + // Check if the point at the appropriate index is the point we're looking + // for. If it is, just use it, otherwise search the array for a point + // in the proper place. + var setRow = row - this.getLeftBoundary_(setIdx); + if (setRow < points.length && points[setRow].idx == row) { + var point = points[setRow]; + if (point.yval !== null) this.selPoints_.push(point); + } else { + for (var pointIdx = 0; pointIdx < points.length; ++pointIdx) { + var point = points[pointIdx]; + if (point.idx == row) { + if (point.yval !== null) { + this.selPoints_.push(point); + } + break; + } + } + } + } + } else { + if (this.lastRow_ >= 0) changed = true; + this.lastRow_ = -1; + } + + if (this.selPoints_.length) { + this.lastx_ = this.selPoints_[0].xval; + } else { + this.lastx_ = -1; + } + + if (opt_seriesName !== undefined) { + if (this.highlightSet_ !== opt_seriesName) changed = true; + this.highlightSet_ = opt_seriesName; + } + + if (opt_locked !== undefined) { + this.lockedSet_ = opt_locked; + } + + if (changed) { + this.updateSelection_(undefined); + } + return changed; +}; + +/** + * The mouse has left the canvas. Clear out whatever artifacts remain + * @param {Object} event the mouseout event from the browser. + * @private + */ +Dygraph.prototype.mouseOut_ = function(event) { + if (this.getFunctionOption("unhighlightCallback")) { + this.getFunctionOption("unhighlightCallback").call(this, event); + } + + if (this.getBooleanOption("hideOverlayOnMouseOut") && !this.lockedSet_) { + this.clearSelection(); + } +}; + +/** + * Clears the current selection (i.e. points that were highlighted by moving + * the mouse over the chart). + */ +Dygraph.prototype.clearSelection = function() { + this.cascadeEvents_('deselect', {}); + + this.lockedSet_ = false; + // Get rid of the overlay data + if (this.fadeLevel) { + this.animateSelection_(-1); + return; + } + this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_); + this.fadeLevel = 0; + this.selPoints_ = []; + this.lastx_ = -1; + this.lastRow_ = -1; + this.highlightSet_ = null; +}; + +/** + * Returns the number of the currently selected row. To get data for this row, + * you can use the getValue method. + * @return {number} row number, or -1 if nothing is selected + */ +Dygraph.prototype.getSelection = function() { + if (!this.selPoints_ || this.selPoints_.length < 1) { + return -1; + } + + for (var setIdx = 0; setIdx < this.layout_.points.length; setIdx++) { + var points = this.layout_.points[setIdx]; + for (var row = 0; row < points.length; row++) { + if (points[row].x == this.selPoints_[0].x) { + return points[row].idx; + } + } + } + return -1; +}; + +/** + * Returns the name of the currently-highlighted series. + * Only available when the highlightSeriesOpts option is in use. + */ +Dygraph.prototype.getHighlightSeries = function() { + return this.highlightSet_; +}; + +/** + * Returns true if the currently-highlighted series was locked + * via setSelection(..., seriesName, true). + */ +Dygraph.prototype.isSeriesLocked = function() { + return this.lockedSet_; +}; + +/** + * Fires when there's data available to be graphed. + * @param {string} data Raw CSV data to be plotted + * @private + */ +Dygraph.prototype.loadedEvent_ = function(data) { + this.rawData_ = this.parseCSV_(data); + this.cascadeDataDidUpdateEvent_(); + this.predraw_(); +}; + +/** + * Add ticks on the x-axis representing years, months, quarters, weeks, or days + * @private + */ +Dygraph.prototype.addXTicks_ = function() { + // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... + var range; + if (this.dateWindow_) { + range = [this.dateWindow_[0], this.dateWindow_[1]]; + } else { + range = this.xAxisExtremes(); + } + + var xAxisOptionsView = this.optionsViewForAxis_('x'); + var xTicks = xAxisOptionsView('ticker')( + range[0], + range[1], + this.plotter_.area.w, // TODO(danvk): should be area.width + xAxisOptionsView, + this); + // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks); + // console.log(msg); + this.layout_.setXTicks(xTicks); +}; + +/** + * Returns the correct handler class for the currently set options. + * @private + */ +Dygraph.prototype.getHandlerClass_ = function() { + var handlerClass; + if (this.attr_('dataHandler')) { + handlerClass = this.attr_('dataHandler'); + } else if (this.fractions_) { + if (this.getBooleanOption('errorBars')) { + handlerClass = Dygraph.DataHandlers.FractionsBarsHandler; + } else { + handlerClass = Dygraph.DataHandlers.DefaultFractionHandler; + } + } else if (this.getBooleanOption('customBars')) { + handlerClass = Dygraph.DataHandlers.CustomBarsHandler; + } else if (this.getBooleanOption('errorBars')) { + handlerClass = Dygraph.DataHandlers.ErrorBarsHandler; + } else { + handlerClass = Dygraph.DataHandlers.DefaultHandler; + } + return handlerClass; +}; + +/** + * @private + * This function is called once when the chart's data is changed or the options + * dictionary is updated. It is _not_ called when the user pans or zooms. The + * idea is that values derived from the chart's data can be computed here, + * rather than every time the chart is drawn. This includes things like the + * number of axes, rolling averages, etc. + */ +Dygraph.prototype.predraw_ = function() { + var start = new Date(); + + // Create the correct dataHandler + this.dataHandler_ = new (this.getHandlerClass_())(); + + this.layout_.computePlotArea(); + + // TODO(danvk): move more computations out of drawGraph_ and into here. + this.computeYAxes_(); + + if (!this.is_initial_draw_) { + this.canvas_ctx_.restore(); + this.hidden_ctx_.restore(); + } + + this.canvas_ctx_.save(); + this.hidden_ctx_.save(); + + // Create a new plotter. + this.plotter_ = new DygraphCanvasRenderer(this, + this.hidden_, + this.hidden_ctx_, + this.layout_); + + // The roller sits in the bottom left corner of the chart. We don't know where + // this will be until the options are available, so it's positioned here. + this.createRollInterface_(); + + this.cascadeEvents_('predraw'); + + // Convert the raw data (a 2D array) into the internal format and compute + // rolling averages. + this.rolledSeries_ = [null]; // x-axis is the first series and it's special + for (var i = 1; i < this.numColumns(); i++) { + // var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong // konigsberg thinks so too. + var series = this.dataHandler_.extractSeries(this.rawData_, i, this.attributes_); + if (this.rollPeriod_ > 1) { + series = this.dataHandler_.rollingAverage(series, this.rollPeriod_, this.attributes_); + } + + this.rolledSeries_.push(series); + } + + // If the data or options have changed, then we'd better redraw. + this.drawGraph_(); + + // This is used to determine whether to do various animations. + var end = new Date(); + this.drawingTimeMs_ = (end - start); +}; + +/** + * Point structure. + * + * xval_* and yval_* are the original unscaled data values, + * while x_* and y_* are scaled to the range (0.0-1.0) for plotting. + * yval_stacked is the cumulative Y value used for stacking graphs, + * and bottom/top/minus/plus are used for error bar graphs. + * + * @typedef {{ + * idx: number, + * name: string, + * x: ?number, + * xval: ?number, + * y_bottom: ?number, + * y: ?number, + * y_stacked: ?number, + * y_top: ?number, + * yval_minus: ?number, + * yval: ?number, + * yval_plus: ?number, + * yval_stacked + * }} + */ +Dygraph.PointType = undefined; + +/** + * Calculates point stacking for stackedGraph=true. + * + * For stacking purposes, interpolate or extend neighboring data across + * NaN values based on stackedGraphNaNFill settings. This is for display + * only, the underlying data value as shown in the legend remains NaN. + * + * @param {Array.<Dygraph.PointType>} points Point array for a single series. + * Updates each Point's yval_stacked property. + * @param {Array.<number>} cumulativeYval Accumulated top-of-graph stacked Y + * values for the series seen so far. Index is the row number. Updated + * based on the current series's values. + * @param {Array.<number>} seriesExtremes Min and max values, updated + * to reflect the stacked values. + * @param {string} fillMethod Interpolation method, one of 'all', 'inside', or + * 'none'. + * @private + */ +Dygraph.stackPoints_ = function( + points, cumulativeYval, seriesExtremes, fillMethod) { + var lastXval = null; + var prevPoint = null; + var nextPoint = null; + var nextPointIdx = -1; + + // Find the next stackable point starting from the given index. + var updateNextPoint = function(idx) { + // If we've previously found a non-NaN point and haven't gone past it yet, + // just use that. + if (nextPointIdx >= idx) return; + + // We haven't found a non-NaN point yet or have moved past it, + // look towards the right to find a non-NaN point. + for (var j = idx; j < points.length; ++j) { + // Clear out a previously-found point (if any) since it's no longer + // valid, we shouldn't use it for interpolation anymore. + nextPoint = null; + if (!isNaN(points[j].yval) && points[j].yval !== null) { + nextPointIdx = j; + nextPoint = points[j]; + break; + } + } + }; + + for (var i = 0; i < points.length; ++i) { + var point = points[i]; + var xval = point.xval; + if (cumulativeYval[xval] === undefined) { + cumulativeYval[xval] = 0; + } + + var actualYval = point.yval; + if (isNaN(actualYval) || actualYval === null) { + if(fillMethod == 'none') { + actualYval = 0; + } else { + // Interpolate/extend for stacking purposes if possible. + updateNextPoint(i); + if (prevPoint && nextPoint && fillMethod != 'none') { + // Use linear interpolation between prevPoint and nextPoint. + actualYval = prevPoint.yval + (nextPoint.yval - prevPoint.yval) * + ((xval - prevPoint.xval) / (nextPoint.xval - prevPoint.xval)); + } else if (prevPoint && fillMethod == 'all') { + actualYval = prevPoint.yval; + } else if (nextPoint && fillMethod == 'all') { + actualYval = nextPoint.yval; + } else { + actualYval = 0; + } + } + } else { + prevPoint = point; + } + + var stackedYval = cumulativeYval[xval]; + if (lastXval != xval) { + // If an x-value is repeated, we ignore the duplicates. + stackedYval += actualYval; + cumulativeYval[xval] = stackedYval; + } + lastXval = xval; + + point.yval_stacked = stackedYval; + + if (stackedYval > seriesExtremes[1]) { + seriesExtremes[1] = stackedYval; + } + if (stackedYval < seriesExtremes[0]) { + seriesExtremes[0] = stackedYval; + } + } +}; + + +/** + * Loop over all fields and create datasets, calculating extreme y-values for + * each series and extreme x-indices as we go. + * + * dateWindow is passed in as an explicit parameter so that we can compute + * extreme values "speculatively", i.e. without actually setting state on the + * dygraph. + * + * @param {Array.<Array.<Array.<(number|Array<number>)>>} rolledSeries, where + * rolledSeries[seriesIndex][row] = raw point, where + * seriesIndex is the column number starting with 1, and + * rawPoint is [x,y] or [x, [y, err]] or [x, [y, yminus, yplus]]. + * @param {?Array.<number>} dateWindow [xmin, xmax] pair, or null. + * @return {{ + * points: Array.<Array.<Dygraph.PointType>>, + * seriesExtremes: Array.<Array.<number>>, + * boundaryIds: Array.<number>}} + * @private + */ +Dygraph.prototype.gatherDatasets_ = function(rolledSeries, dateWindow) { + var boundaryIds = []; + var points = []; + var cumulativeYval = []; // For stacked series. + var extremes = {}; // series name -> [low, high] + var seriesIdx, sampleIdx; + var firstIdx, lastIdx; + var axisIdx; + + // Loop over the fields (series). Go from the last to the first, + // because if they're stacked that's how we accumulate the values. + var num_series = rolledSeries.length - 1; + var series; + for (seriesIdx = num_series; seriesIdx >= 1; seriesIdx--) { + if (!this.visibility()[seriesIdx - 1]) continue; + + // Prune down to the desired range, if necessary (for zooming) + // Because there can be lines going to points outside of the visible area, + // we actually prune to visible points, plus one on either side. + if (dateWindow) { + series = rolledSeries[seriesIdx]; + var low = dateWindow[0]; + var high = dateWindow[1]; + + // TODO(danvk): do binary search instead of linear search. + // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. + firstIdx = null; + lastIdx = null; + for (sampleIdx = 0; sampleIdx < series.length; sampleIdx++) { + if (series[sampleIdx][0] >= low && firstIdx === null) { + firstIdx = sampleIdx; + } + if (series[sampleIdx][0] <= high) { + lastIdx = sampleIdx; + } + } + + if (firstIdx === null) firstIdx = 0; + var correctedFirstIdx = firstIdx; + var isInvalidValue = true; + while (isInvalidValue && correctedFirstIdx > 0) { + correctedFirstIdx--; + // check if the y value is null. + isInvalidValue = series[correctedFirstIdx][1] === null; + } + + if (lastIdx === null) lastIdx = series.length - 1; + var correctedLastIdx = lastIdx; + isInvalidValue = true; + while (isInvalidValue && correctedLastIdx < series.length - 1) { + correctedLastIdx++; + isInvalidValue = series[correctedLastIdx][1] === null; + } + + if (correctedFirstIdx!==firstIdx) { + firstIdx = correctedFirstIdx; + } + if (correctedLastIdx !== lastIdx) { + lastIdx = correctedLastIdx; + } + + boundaryIds[seriesIdx-1] = [firstIdx, lastIdx]; + + // .slice's end is exclusive, we want to include lastIdx. + series = series.slice(firstIdx, lastIdx + 1); + } else { + series = rolledSeries[seriesIdx]; + boundaryIds[seriesIdx-1] = [0, series.length-1]; + } + + var seriesName = this.attr_("labels")[seriesIdx]; + var seriesExtremes = this.dataHandler_.getExtremeYValues(series, + dateWindow, this.getBooleanOption("stepPlot",seriesName)); + + var seriesPoints = this.dataHandler_.seriesToPoints(series, + seriesName, boundaryIds[seriesIdx-1][0]); + + if (this.getBooleanOption("stackedGraph")) { + axisIdx = this.attributes_.axisForSeries(seriesName); + if (cumulativeYval[axisIdx] === undefined) { + cumulativeYval[axisIdx] = []; + } + Dygraph.stackPoints_(seriesPoints, cumulativeYval[axisIdx], seriesExtremes, + this.getBooleanOption("stackedGraphNaNFill")); + } + + extremes[seriesName] = seriesExtremes; + points[seriesIdx] = seriesPoints; + } + + return { points: points, extremes: extremes, boundaryIds: boundaryIds }; +}; + +/** + * Update the graph with new data. This method is called when the viewing area + * has changed. If the underlying data or options have changed, predraw_ will + * be called before drawGraph_ is called. + * + * @private + */ +Dygraph.prototype.drawGraph_ = function() { + var start = new Date(); + + // This is used to set the second parameter to drawCallback, below. + var is_initial_draw = this.is_initial_draw_; + this.is_initial_draw_ = false; + + this.layout_.removeAllDatasets(); + this.setColors_(); + this.attrs_.pointSize = 0.5 * this.getNumericOption('highlightCircleSize'); + + var packed = this.gatherDatasets_(this.rolledSeries_, this.dateWindow_); + var points = packed.points; + var extremes = packed.extremes; + this.boundaryIds_ = packed.boundaryIds; + + this.setIndexByName_ = {}; + var labels = this.attr_("labels"); + if (labels.length > 0) { + this.setIndexByName_[labels[0]] = 0; + } + var dataIdx = 0; + for (var i = 1; i < points.length; i++) { + this.setIndexByName_[labels[i]] = i; + if (!this.visibility()[i - 1]) continue; + this.layout_.addDataset(labels[i], points[i]); + this.datasetIndex_[i] = dataIdx++; + } + + this.computeYAxisRanges_(extremes); + this.layout_.setYAxes(this.axes_); + + this.addXTicks_(); + + // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously + var tmp_zoomed_x = this.zoomed_x_; + // Tell PlotKit to use this new data and render itself + this.zoomed_x_ = tmp_zoomed_x; + this.layout_.evaluate(); + this.renderGraph_(is_initial_draw); + + if (this.getStringOption("timingName")) { + var end = new Date(); + console.log(this.getStringOption("timingName") + " - drawGraph: " + (end - start) + "ms"); + } +}; + +/** + * This does the work of drawing the chart. It assumes that the layout and axis + * scales have already been set (e.g. by predraw_). + * + * @private + */ +Dygraph.prototype.renderGraph_ = function(is_initial_draw) { + this.cascadeEvents_('clearChart'); + this.plotter_.clear(); + + if (this.getFunctionOption('underlayCallback')) { + // NOTE: we pass the dygraph object to this callback twice to avoid breaking + // users who expect a deprecated form of this callback. + this.getFunctionOption('underlayCallback').call(this, + this.hidden_ctx_, this.layout_.getPlotArea(), this, this); + } + + var e = { + canvas: this.hidden_, + drawingContext: this.hidden_ctx_ + }; + this.cascadeEvents_('willDrawChart', e); + this.plotter_.render(); + this.cascadeEvents_('didDrawChart', e); + this.lastRow_ = -1; // because plugins/legend.js clears the legend + + // TODO(danvk): is this a performance bottleneck when panning? + // The interaction canvas should already be empty in that situation. + this.canvas_.getContext('2d').clearRect(0, 0, this.width_, this.height_); + + if (this.getFunctionOption("drawCallback") !== null) { + this.getFunctionOption("drawCallback")(this, is_initial_draw); + } + if (is_initial_draw) { + this.readyFired_ = true; + while (this.readyFns_.length > 0) { + var fn = this.readyFns_.pop(); + fn(this); + } + } +}; + +/** + * @private + * Determine properties of the y-axes which are independent of the data + * currently being displayed. This includes things like the number of axes and + * the style of the axes. It does not include the range of each axis and its + * tick marks. + * This fills in this.axes_. + * axes_ = [ { options } ] + * indices are into the axes_ array. + */ +Dygraph.prototype.computeYAxes_ = function() { + // Preserve valueWindow settings if they exist, and if the user hasn't + // specified a new valueRange. + var valueWindows, axis, index, opts, v; + if (this.axes_ !== undefined && this.user_attrs_.hasOwnProperty("valueRange") === false) { + valueWindows = []; + for (index = 0; index < this.axes_.length; index++) { + valueWindows.push(this.axes_[index].valueWindow); + } + } + + // this.axes_ doesn't match this.attributes_.axes_.options. It's used for + // data computation as well as options storage. + // Go through once and add all the axes. + this.axes_ = []; + + for (axis = 0; axis < this.attributes_.numAxes(); axis++) { + // Add a new axis, making a copy of its per-axis options. + opts = { g : this }; + Dygraph.update(opts, this.attributes_.axisOptions(axis)); + this.axes_[axis] = opts; + } + + + // Copy global valueRange option over to the first axis. + // NOTE(konigsberg): Are these two statements necessary? + // I tried removing it. The automated tests pass, and manually + // messing with tests/zoom.html showed no trouble. + v = this.attr_('valueRange'); + if (v) this.axes_[0].valueRange = v; + + if (valueWindows !== undefined) { + // Restore valueWindow settings. + + // When going from two axes back to one, we only restore + // one axis. + var idxCount = Math.min(valueWindows.length, this.axes_.length); + + for (index = 0; index < idxCount; index++) { + this.axes_[index].valueWindow = valueWindows[index]; + } + } + + for (axis = 0; axis < this.axes_.length; axis++) { + if (axis === 0) { + opts = this.optionsViewForAxis_('y' + (axis ? '2' : '')); + v = opts("valueRange"); + if (v) this.axes_[axis].valueRange = v; + } else { // To keep old behavior + var axes = this.user_attrs_.axes; + if (axes && axes.y2) { + v = axes.y2.valueRange; + if (v) this.axes_[axis].valueRange = v; + } + } + } +}; + +/** + * Returns the number of y-axes on the chart. + * @return {number} the number of axes. + */ +Dygraph.prototype.numAxes = function() { + return this.attributes_.numAxes(); +}; + +/** + * @private + * Returns axis properties for the given series. + * @param {string} setName The name of the series for which to get axis + * properties, e.g. 'Y1'. + * @return {Object} The axis properties. + */ +Dygraph.prototype.axisPropertiesForSeries = function(series) { + // TODO(danvk): handle errors. + return this.axes_[this.attributes_.axisForSeries(series)]; +}; + +/** + * @private + * Determine the value range and tick marks for each axis. + * @param {Object} extremes A mapping from seriesName -> [low, high] + * This fills in the valueRange and ticks fields in each entry of this.axes_. + */ +Dygraph.prototype.computeYAxisRanges_ = function(extremes) { + var isNullUndefinedOrNaN = function(num) { + return isNaN(parseFloat(num)); + }; + var numAxes = this.attributes_.numAxes(); + var ypadCompat, span, series, ypad; + + var p_axis; + + // Compute extreme values, a span and tick marks for each axis. + for (var i = 0; i < numAxes; i++) { + var axis = this.axes_[i]; + var logscale = this.attributes_.getForAxis("logscale", i); + var includeZero = this.attributes_.getForAxis("includeZero", i); + var independentTicks = this.attributes_.getForAxis("independentTicks", i); + series = this.attributes_.seriesForAxis(i); + + // Add some padding. This supports two Y padding operation modes: + // + // - backwards compatible (yRangePad not set): + // 10% padding for automatic Y ranges, but not for user-supplied + // ranges, and move a close-to-zero edge to zero except if + // avoidMinZero is set, since drawing at the edge results in + // invisible lines. Unfortunately lines drawn at the edge of a + // user-supplied range will still be invisible. If logscale is + // set, add a variable amount of padding at the top but + // none at the bottom. + // + // - new-style (yRangePad set by the user): + // always add the specified Y padding. + // + ypadCompat = true; + ypad = 0.1; // add 10% + if (this.getNumericOption('yRangePad') !== null) { + ypadCompat = false; + // Convert pixel padding to ratio + ypad = this.getNumericOption('yRangePad') / this.plotter_.area.h; + } + + if (series.length === 0) { + // If no series are defined or visible then use a reasonable default + axis.extremeRange = [0, 1]; + } else { + // Calculate the extremes of extremes. + var minY = Infinity; // extremes[series[0]][0]; + var maxY = -Infinity; // extremes[series[0]][1]; + var extremeMinY, extremeMaxY; + + for (var j = 0; j < series.length; j++) { + // this skips invisible series + if (!extremes.hasOwnProperty(series[j])) continue; + + // Only use valid extremes to stop null data series' from corrupting the scale. + extremeMinY = extremes[series[j]][0]; + if (extremeMinY !== null) { + minY = Math.min(extremeMinY, minY); + } + extremeMaxY = extremes[series[j]][1]; + if (extremeMaxY !== null) { + maxY = Math.max(extremeMaxY, maxY); + } + } + + // Include zero if requested by the user. + if (includeZero && !logscale) { + if (minY > 0) minY = 0; + if (maxY < 0) maxY = 0; + } + + // Ensure we have a valid scale, otherwise default to [0, 1] for safety. + if (minY == Infinity) minY = 0; + if (maxY == -Infinity) maxY = 1; + + span = maxY - minY; + // special case: if we have no sense of scale, center on the sole value. + if (span === 0) { + if (maxY !== 0) { + span = Math.abs(maxY); + } else { + // ... and if the sole value is zero, use range 0-1. + maxY = 1; + span = 1; + } + } + + var maxAxisY, minAxisY; + if (logscale) { + if (ypadCompat) { + maxAxisY = maxY + ypad * span; + minAxisY = minY; + } else { + var logpad = Math.exp(Math.log(span) * ypad); + maxAxisY = maxY * logpad; + minAxisY = minY / logpad; + } + } else { + maxAxisY = maxY + ypad * span; + minAxisY = minY - ypad * span; + + // Backwards-compatible behavior: Move the span to start or end at zero if it's + // close to zero, but not if avoidMinZero is set. + if (ypadCompat && !this.getBooleanOption("avoidMinZero")) { + if (minAxisY < 0 && minY >= 0) minAxisY = 0; + if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; + } + } + axis.extremeRange = [minAxisY, maxAxisY]; + } + if (axis.valueWindow) { + // This is only set if the user has zoomed on the y-axis. It is never set + // by a user. It takes precedence over axis.valueRange because, if you set + // valueRange, you'd still expect to be able to pan. + axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; + } else if (axis.valueRange) { + // This is a user-set value range for this axis. + var y0 = isNullUndefinedOrNaN(axis.valueRange[0]) ? axis.extremeRange[0] : axis.valueRange[0]; + var y1 = isNullUndefinedOrNaN(axis.valueRange[1]) ? axis.extremeRange[1] : axis.valueRange[1]; + if (!ypadCompat) { + if (axis.logscale) { + var logpad = Math.exp(Math.log(span) * ypad); + y0 *= logpad; + y1 /= logpad; + } else { + span = y1 - y0; + y0 -= span * ypad; + y1 += span * ypad; + } + } + axis.computedValueRange = [y0, y1]; + } else { + axis.computedValueRange = axis.extremeRange; + } + + + if (independentTicks) { + axis.independentTicks = independentTicks; + var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); + var ticker = opts('ticker'); + axis.ticks = ticker(axis.computedValueRange[0], + axis.computedValueRange[1], + this.plotter_.area.h, + opts, + this); + // Define the first independent axis as primary axis. + if (!p_axis) p_axis = axis; + } + } + if (p_axis === undefined) { + throw ("Configuration Error: At least one axis has to have the \"independentTicks\" option activated."); + } + // Add ticks. By default, all axes inherit the tick positions of the + // primary axis. However, if an axis is specifically marked as having + // independent ticks, then that is permissible as well. + for (var i = 0; i < numAxes; i++) { + var axis = this.axes_[i]; + + if (!axis.independentTicks) { + var opts = this.optionsViewForAxis_('y' + (i ? '2' : '')); + var ticker = opts('ticker'); + var p_ticks = p_axis.ticks; + var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; + var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; + var tick_values = []; + for (var k = 0; k < p_ticks.length; k++) { + var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale; + var y_val = axis.computedValueRange[0] + y_frac * scale; + tick_values.push(y_val); + } + + axis.ticks = ticker(axis.computedValueRange[0], + axis.computedValueRange[1], + this.plotter_.area.h, + opts, + this, + tick_values); + } + } +}; + +/** + * Detects the type of the str (date or numeric) and sets the various + * formatting attributes in this.attrs_ based on this type. + * @param {string} str An x value. + * @private + */ +Dygraph.prototype.detectTypeFromString_ = function(str) { + var isDate = false; + var dashPos = str.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2 + if ((dashPos > 0 && (str[dashPos-1] != 'e' && str[dashPos-1] != 'E')) || + str.indexOf('/') >= 0 || + isNaN(parseFloat(str))) { + isDate = true; + } else if (str.length == 8 && str > '19700101' && str < '20371231') { + // TODO(danvk): remove support for this format. + isDate = true; + } + + this.setXAxisOptions_(isDate); +}; + +Dygraph.prototype.setXAxisOptions_ = function(isDate) { + if (isDate) { + this.attrs_.xValueParser = Dygraph.dateParser; + this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; + this.attrs_.axes.x.ticker = Dygraph.dateTicker; + this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; + } else { + /** @private (shut up, jsdoc!) */ + this.attrs_.xValueParser = function(x) { return parseFloat(x); }; + // TODO(danvk): use Dygraph.numberValueFormatter here? + /** @private (shut up, jsdoc!) */ + this.attrs_.axes.x.valueFormatter = function(x) { return x; }; + this.attrs_.axes.x.ticker = Dygraph.numericTicks; + this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; + } +}; + +/** + * @private + * Parses a string in a special csv format. We expect a csv file where each + * line is a date point, and the first field in each line is the date string. + * We also expect that all remaining fields represent series. + * if the errorBars attribute is set, then interpret the fields as: + * date, series1, stddev1, series2, stddev2, ... + * @param {[Object]} data See above. + * + * @return [Object] An array with one entry for each row. These entries + * are an array of cells in that row. The first entry is the parsed x-value for + * the row. The second, third, etc. are the y-values. These can take on one of + * three forms, depending on the CSV and constructor parameters: + * 1. numeric value + * 2. [ value, stddev ] + * 3. [ low value, center value, high value ] + */ +Dygraph.prototype.parseCSV_ = function(data) { + var ret = []; + var line_delimiter = Dygraph.detectLineDelimiter(data); + var lines = data.split(line_delimiter || "\n"); + var vals, j; + + // Use the default delimiter or fall back to a tab if that makes sense. + var delim = this.getStringOption('delimiter'); + if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { + delim = '\t'; + } + + var start = 0; + if (!('labels' in this.user_attrs_)) { + // User hasn't explicitly set labels, so they're (presumably) in the CSV. + start = 1; + this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_. + this.attributes_.reparseSeries(); + } + var line_no = 0; + + var xParser; + var defaultParserSet = false; // attempt to auto-detect x value type + var expectedCols = this.attr_("labels").length; + var outOfOrder = false; + for (var i = start; i < lines.length; i++) { + var line = lines[i]; + line_no = i; + if (line.length === 0) continue; // skip blank lines + if (line[0] == '#') continue; // skip comment lines + var inFields = line.split(delim); + if (inFields.length < 2) continue; + + var fields = []; + if (!defaultParserSet) { + this.detectTypeFromString_(inFields[0]); + xParser = this.getFunctionOption("xValueParser"); + defaultParserSet = true; + } + fields[0] = xParser(inFields[0], this); + + // If fractions are expected, parse the numbers as "A/B" + if (this.fractions_) { + for (j = 1; j < inFields.length; j++) { + // TODO(danvk): figure out an appropriate way to flag parse errors. + vals = inFields[j].split("/"); + if (vals.length != 2) { + console.error('Expected fractional "num/den" values in CSV data ' + + "but found a value '" + inFields[j] + "' on line " + + (1 + i) + " ('" + line + "') which is not of this form."); + fields[j] = [0, 0]; + } else { + fields[j] = [Dygraph.parseFloat_(vals[0], i, line), + Dygraph.parseFloat_(vals[1], i, line)]; + } + } + } else if (this.getBooleanOption("errorBars")) { + // If there are error bars, values are (value, stddev) pairs + if (inFields.length % 2 != 1) { + console.error('Expected alternating (value, stdev.) pairs in CSV data ' + + 'but line ' + (1 + i) + ' has an odd number of values (' + + (inFields.length - 1) + "): '" + line + "'"); + } + for (j = 1; j < inFields.length; j += 2) { + fields[(j + 1) / 2] = [Dygraph.parseFloat_(inFields[j], i, line), + Dygraph.parseFloat_(inFields[j + 1], i, line)]; + } + } else if (this.getBooleanOption("customBars")) { + // Bars are a low;center;high tuple + for (j = 1; j < inFields.length; j++) { + var val = inFields[j]; + if (/^ *$/.test(val)) { + fields[j] = [null, null, null]; + } else { + vals = val.split(";"); + if (vals.length == 3) { + fields[j] = [ Dygraph.parseFloat_(vals[0], i, line), + Dygraph.parseFloat_(vals[1], i, line), + Dygraph.parseFloat_(vals[2], i, line) ]; + } else { + console.warn('When using customBars, values must be either blank ' + + 'or "low;center;high" tuples (got "' + val + + '" on line ' + (1+i)); + } + } + } + } else { + // Values are just numbers + for (j = 1; j < inFields.length; j++) { + fields[j] = Dygraph.parseFloat_(inFields[j], i, line); + } + } + if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { + outOfOrder = true; + } + + if (fields.length != expectedCols) { + console.error("Number of columns in line " + i + " (" + fields.length + + ") does not agree with number of labels (" + expectedCols + + ") " + line); + } + + // If the user specified the 'labels' option and none of the cells of the + // first row parsed correctly, then they probably double-specified the + // labels. We go with the values set in the option, discard this row and + // log a warning to the JS console. + if (i === 0 && this.attr_('labels')) { + var all_null = true; + for (j = 0; all_null && j < fields.length; j++) { + if (fields[j]) all_null = false; + } + if (all_null) { + console.warn("The dygraphs 'labels' option is set, but the first row " + + "of CSV data ('" + line + "') appears to also contain " + + "labels. Will drop the CSV labels and use the option " + + "labels."); + continue; + } + } + ret.push(fields); + } + + if (outOfOrder) { + console.warn("CSV is out of order; order it correctly to speed loading."); + ret.sort(function(a,b) { return a[0] - b[0]; }); + } + + return ret; +}; + +/** + * The user has provided their data as a pre-packaged JS array. If the x values + * are numeric, this is the same as dygraphs' internal format. If the x values + * are dates, we need to convert them from Date objects to ms since epoch. + * @param {!Array} data + * @return {Object} data with numeric x values. + * @private + */ +Dygraph.prototype.parseArray_ = function(data) { + // Peek at the first x value to see if it's numeric. + if (data.length === 0) { + console.error("Can't plot empty data set"); + return null; + } + if (data[0].length === 0) { + console.error("Data set cannot contain an empty row"); + return null; + } + + var i; + if (this.attr_("labels") === null) { + console.warn("Using default labels. Set labels explicitly via 'labels' " + + "in the options parameter"); + this.attrs_.labels = [ "X" ]; + for (i = 1; i < data[0].length; i++) { + this.attrs_.labels.push("Y" + i); // Not user_attrs_. + } + this.attributes_.reparseSeries(); + } else { + var num_labels = this.attr_("labels"); + if (num_labels.length != data[0].length) { + console.error("Mismatch between number of labels (" + num_labels + ")" + + " and number of columns in array (" + data[0].length + ")"); + return null; + } + } + + if (Dygraph.isDateLike(data[0][0])) { + // Some intelligent defaults for a date x-axis. + this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; + this.attrs_.axes.x.ticker = Dygraph.dateTicker; + this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; + + // Assume they're all dates. + var parsedData = Dygraph.clone(data); + for (i = 0; i < data.length; i++) { + if (parsedData[i].length === 0) { + console.error("Row " + (1 + i) + " of data is empty"); + return null; + } + if (parsedData[i][0] === null || + typeof(parsedData[i][0].getTime) != 'function' || + isNaN(parsedData[i][0].getTime())) { + console.error("x value in row " + (1 + i) + " is not a Date"); + return null; + } + parsedData[i][0] = parsedData[i][0].getTime(); + } + return parsedData; + } else { + // Some intelligent defaults for a numeric x-axis. + /** @private (shut up, jsdoc!) */ + this.attrs_.axes.x.valueFormatter = function(x) { return x; }; + this.attrs_.axes.x.ticker = Dygraph.numericTicks; + this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter; + return data; + } +}; + +/** + * Parses a DataTable object from gviz. + * The data is expected to have a first column that is either a date or a + * number. All subsequent columns must be numbers. If there is a clear mismatch + * between this.xValueParser_ and the type of the first column, it will be + * fixed. Fills out rawData_. + * @param {!google.visualization.DataTable} data See above. + * @private + */ +Dygraph.prototype.parseDataTable_ = function(data) { + var shortTextForAnnotationNum = function(num) { + // converts [0-9]+ [A-Z][a-z]* + // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab + // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz + var shortText = String.fromCharCode(65 /* A */ + num % 26); + num = Math.floor(num / 26); + while ( num > 0 ) { + shortText = String.fromCharCode(65 /* A */ + (num - 1) % 26 ) + shortText.toLowerCase(); + num = Math.floor((num - 1) / 26); + } + return shortText; + }; + + var cols = data.getNumberOfColumns(); + var rows = data.getNumberOfRows(); + + var indepType = data.getColumnType(0); + if (indepType == 'date' || indepType == 'datetime') { + this.attrs_.xValueParser = Dygraph.dateParser; + this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter; + this.attrs_.axes.x.ticker = Dygraph.dateTicker; + this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter; + } else if (indepType == 'number') { + this.attrs_.xValueParser = function(x) { return parseFloat(x); }; + this.attrs_.axes.x.valueFormatter = function(x) { return x; }; + this.attrs_.axes.x.ticker = Dygraph.numericTicks; + this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter; + } else { + console.error("only 'date', 'datetime' and 'number' types are supported " + + "for column 1 of DataTable input (Got '" + indepType + "')"); + return null; + } + + // Array of the column indices which contain data (and not annotations). + var colIdx = []; + var annotationCols = {}; // data index -> [annotation cols] + var hasAnnotations = false; + var i, j; + for (i = 1; i < cols; i++) { + var type = data.getColumnType(i); + if (type == 'number') { + colIdx.push(i); + } else if (type == 'string' && this.getBooleanOption('displayAnnotations')) { + // This is OK -- it's an annotation column. + var dataIdx = colIdx[colIdx.length - 1]; + if (!annotationCols.hasOwnProperty(dataIdx)) { + annotationCols[dataIdx] = [i]; + } else { + annotationCols[dataIdx].push(i); + } + hasAnnotations = true; + } else { + console.error("Only 'number' is supported as a dependent type with Gviz." + + " 'string' is only supported if displayAnnotations is true"); + } + } + + // Read column labels + // TODO(danvk): add support back for errorBars + var labels = [data.getColumnLabel(0)]; + for (i = 0; i < colIdx.length; i++) { + labels.push(data.getColumnLabel(colIdx[i])); + if (this.getBooleanOption("errorBars")) i += 1; + } + this.attrs_.labels = labels; + cols = labels.length; + + var ret = []; + var outOfOrder = false; + var annotations = []; + for (i = 0; i < rows; i++) { + var row = []; + if (typeof(data.getValue(i, 0)) === 'undefined' || + data.getValue(i, 0) === null) { + console.warn("Ignoring row " + i + + " of DataTable because of undefined or null first column."); + continue; + } + + if (indepType == 'date' || indepType == 'datetime') { + row.push(data.getValue(i, 0).getTime()); + } else { + row.push(data.getValue(i, 0)); + } + if (!this.getBooleanOption("errorBars")) { + for (j = 0; j < colIdx.length; j++) { + var col = colIdx[j]; + row.push(data.getValue(i, col)); + if (hasAnnotations && + annotationCols.hasOwnProperty(col) && + data.getValue(i, annotationCols[col][0]) !== null) { + var ann = {}; + ann.series = data.getColumnLabel(col); + ann.xval = row[0]; + ann.shortText = shortTextForAnnotationNum(annotations.length); + ann.text = ''; + for (var k = 0; k < annotationCols[col].length; k++) { + if (k) ann.text += "\n"; + ann.text += data.getValue(i, annotationCols[col][k]); + } + annotations.push(ann); + } + } + + // Strip out infinities, which give dygraphs problems later on. + for (j = 0; j < row.length; j++) { + if (!isFinite(row[j])) row[j] = null; + } + } else { + for (j = 0; j < cols - 1; j++) { + row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); + } + } + if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { + outOfOrder = true; + } + ret.push(row); + } + + if (outOfOrder) { + console.warn("DataTable is out of order; order it correctly to speed loading."); + ret.sort(function(a,b) { return a[0] - b[0]; }); + } + this.rawData_ = ret; + + if (annotations.length > 0) { + this.setAnnotations(annotations, true); + } + this.attributes_.reparseSeries(); +}; + +/** + * Signals to plugins that the chart data has updated. + * This happens after the data has updated but before the chart has redrawn. + */ +Dygraph.prototype.cascadeDataDidUpdateEvent_ = function() { + // TODO(danvk): there are some issues checking xAxisRange() and using + // toDomCoords from handlers of this event. The visible range should be set + // when the chart is drawn, not derived from the data. + this.cascadeEvents_('dataDidUpdate', {}); +}; + +/** + * Get the CSV data. If it's in a function, call that function. If it's in a + * file, do an XMLHttpRequest to get it. + * @private + */ +Dygraph.prototype.start_ = function() { + var data = this.file_; + + // Functions can return references of all other types. + if (typeof data == 'function') { + data = data(); + } + + if (Dygraph.isArrayLike(data)) { + this.rawData_ = this.parseArray_(data); + this.cascadeDataDidUpdateEvent_(); + this.predraw_(); + } else if (typeof data == 'object' && + typeof data.getColumnRange == 'function') { + // must be a DataTable from gviz. + this.parseDataTable_(data); + this.cascadeDataDidUpdateEvent_(); + this.predraw_(); + } else if (typeof data == 'string') { + // Heuristic: a newline means it's CSV data. Otherwise it's an URL. + var line_delimiter = Dygraph.detectLineDelimiter(data); + if (line_delimiter) { + this.loadedEvent_(data); + } else { + // REMOVE_FOR_IE + var req; + if (window.XMLHttpRequest) { + // Firefox, Opera, IE7, and other browsers will use the native object + req = new XMLHttpRequest(); + } else { + // IE 5 and 6 will use the ActiveX control + req = new ActiveXObject("Microsoft.XMLHTTP"); + } + + var caller = this; + req.onreadystatechange = function () { + if (req.readyState == 4) { + if (req.status === 200 || // Normal http + req.status === 0) { // Chrome w/ --allow-file-access-from-files + caller.loadedEvent_(req.responseText); + } + } + }; + + req.open("GET", data, true); + req.send(null); + } + } else { + console.error("Unknown data format: " + (typeof data)); + } +}; + +/** + * Changes various properties of the graph. These can include: + * <ul> + * <li>file: changes the source data for the graph</li> + * <li>errorBars: changes whether the data contains stddev</li> + * </ul> + * + * There's a huge variety of options that can be passed to this method. For a + * full list, see http://dygraphs.com/options.html. + * + * @param {Object} input_attrs The new properties and values + * @param {boolean} block_redraw Usually the chart is redrawn after every + * call to updateOptions(). If you know better, you can pass true to + * explicitly block the redraw. This can be useful for chaining + * updateOptions() calls, avoiding the occasional infinite loop and + * preventing redraws when it's not necessary (e.g. when updating a + * callback). + */ +Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) { + if (typeof(block_redraw) == 'undefined') block_redraw = false; + + // mapLegacyOptions_ drops the "file" parameter as a convenience to us. + var file = input_attrs.file; + var attrs = Dygraph.mapLegacyOptions_(input_attrs); + + // TODO(danvk): this is a mess. Move these options into attr_. + if ('rollPeriod' in attrs) { + this.rollPeriod_ = attrs.rollPeriod; + } + if ('dateWindow' in attrs) { + this.dateWindow_ = attrs.dateWindow; + if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) { + this.zoomed_x_ = (attrs.dateWindow !== null); + } + } + if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) { + this.zoomed_y_ = (attrs.valueRange !== null); + } + + // TODO(danvk): validate per-series options. + // Supported: + // strokeWidth + // pointSize + // drawPoints + // highlightCircleSize + + // Check if this set options will require new points. + var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs); + + Dygraph.updateDeep(this.user_attrs_, attrs); + + this.attributes_.reparseSeries(); + + if (file) { + // This event indicates that the data is about to change, but hasn't yet. + // TODO(danvk): support cancelation of the update via this event. + this.cascadeEvents_('dataWillUpdate', {}); + + this.file_ = file; + if (!block_redraw) this.start_(); + } else { + if (!block_redraw) { + if (requiresNewPoints) { + this.predraw_(); + } else { + this.renderGraph_(false); + } + } + } +}; + +/** + * Returns a copy of the options with deprecated names converted into current + * names. Also drops the (potentially-large) 'file' attribute. If the caller is + * interested in that, they should save a copy before calling this. + * @private + */ +Dygraph.mapLegacyOptions_ = function(attrs) { + var my_attrs = {}; + for (var k in attrs) { + if (!attrs.hasOwnProperty(k)) continue; + if (k == 'file') continue; + if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k]; + } + + var set = function(axis, opt, value) { + if (!my_attrs.axes) my_attrs.axes = {}; + if (!my_attrs.axes[axis]) my_attrs.axes[axis] = {}; + my_attrs.axes[axis][opt] = value; + }; + var map = function(opt, axis, new_opt) { + if (typeof(attrs[opt]) != 'undefined') { + console.warn("Option " + opt + " is deprecated. Use the " + + new_opt + " option for the " + axis + " axis instead. " + + "(e.g. { axes : { " + axis + " : { " + new_opt + " : ... } } } " + + "(see http://dygraphs.com/per-axis.html for more information."); + set(axis, new_opt, attrs[opt]); + delete my_attrs[opt]; + } + }; + + // This maps, e.g., xValueFormater -> axes: { x: { valueFormatter: ... } } + map('xValueFormatter', 'x', 'valueFormatter'); + map('pixelsPerXLabel', 'x', 'pixelsPerLabel'); + map('xAxisLabelFormatter', 'x', 'axisLabelFormatter'); + map('xTicker', 'x', 'ticker'); + map('yValueFormatter', 'y', 'valueFormatter'); + map('pixelsPerYLabel', 'y', 'pixelsPerLabel'); + map('yAxisLabelFormatter', 'y', 'axisLabelFormatter'); + map('yTicker', 'y', 'ticker'); + map('drawXGrid', 'x', 'drawGrid'); + map('drawXAxis', 'x', 'drawAxis'); + map('drawYGrid', 'y', 'drawGrid'); + map('drawYAxis', 'y', 'drawAxis'); + map('xAxisLabelWidth', 'x', 'axisLabelWidth'); + map('yAxisLabelWidth', 'y', 'axisLabelWidth'); + return my_attrs; +}; + +/** + * Resizes the dygraph. If no parameters are specified, resizes to fill the + * containing div (which has presumably changed size since the dygraph was + * instantiated. If the width/height are specified, the div will be resized. + * + * This is far more efficient than destroying and re-instantiating a + * Dygraph, since it doesn't have to reparse the underlying data. + * + * @param {number} width Width (in pixels) + * @param {number} height Height (in pixels) + */ +Dygraph.prototype.resize = function(width, height) { + if (this.resize_lock) { + return; + } + this.resize_lock = true; + + if ((width === null) != (height === null)) { + console.warn("Dygraph.resize() should be called with zero parameters or " + + "two non-NULL parameters. Pretending it was zero."); + width = height = null; + } + + var old_width = this.width_; + var old_height = this.height_; + + if (width) { + this.maindiv_.style.width = width + "px"; + this.maindiv_.style.height = height + "px"; + this.width_ = width; + this.height_ = height; + } else { + this.width_ = this.maindiv_.clientWidth; + this.height_ = this.maindiv_.clientHeight; + } + + if (old_width != this.width_ || old_height != this.height_) { + // Resizing a canvas erases it, even when the size doesn't change, so + // any resize needs to be followed by a redraw. + this.resizeElements_(); + this.predraw_(); + } + + this.resize_lock = false; +}; + +/** + * Adjusts the number of points in the rolling average. Updates the graph to + * reflect the new averaging period. + * @param {number} length Number of points over which to average the data. + */ +Dygraph.prototype.adjustRoll = function(length) { + this.rollPeriod_ = length; + this.predraw_(); +}; + +/** + * Returns a boolean array of visibility statuses. + */ +Dygraph.prototype.visibility = function() { + // Do lazy-initialization, so that this happens after we know the number of + // data series. + if (!this.getOption("visibility")) { + this.attrs_.visibility = []; + } + // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs. + while (this.getOption("visibility").length < this.numColumns() - 1) { + this.attrs_.visibility.push(true); + } + return this.getOption("visibility"); +}; + +/** + * Changes the visiblity of a series. + * + * @param {number} num the series index + * @param {boolean} value true or false, identifying the visibility. + */ +Dygraph.prototype.setVisibility = function(num, value) { + var x = this.visibility(); + if (num < 0 || num >= x.length) { + console.warn("invalid series number in setVisibility: " + num); + } else { + x[num] = value; + this.predraw_(); + } +}; + +/** + * How large of an area will the dygraph render itself in? + * This is used for testing. + * @return A {width: w, height: h} object. + * @private + */ +Dygraph.prototype.size = function() { + return { width: this.width_, height: this.height_ }; +}; + +/** + * Update the list of annotations and redraw the chart. + * See dygraphs.com/annotations.html for more info on how to use annotations. + * @param ann {Array} An array of annotation objects. + * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional). + */ +Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { + // Only add the annotation CSS rule once we know it will be used. + Dygraph.addAnnotationRule(); + this.annotations_ = ann; + if (!this.layout_) { + console.warn("Tried to setAnnotations before dygraph was ready. " + + "Try setting them in a ready() block. See " + + "dygraphs.com/tests/annotation.html"); + return; + } + + this.layout_.setAnnotations(this.annotations_); + if (!suppressDraw) { + this.predraw_(); + } +}; + +/** + * Return the list of annotations. + */ +Dygraph.prototype.annotations = function() { + return this.annotations_; +}; + +/** + * Get the list of label names for this graph. The first column is the + * x-axis, so the data series names start at index 1. + * + * Returns null when labels have not yet been defined. + */ +Dygraph.prototype.getLabels = function() { + var labels = this.attr_("labels"); + return labels ? labels.slice() : null; +}; + +/** + * Get the index of a series (column) given its name. The first column is the + * x-axis, so the data series start with index 1. + */ +Dygraph.prototype.indexFromSetName = function(name) { + return this.setIndexByName_[name]; +}; + +/** + * Trigger a callback when the dygraph has drawn itself and is ready to be + * manipulated. This is primarily useful when dygraphs has to do an XHR for the + * data (i.e. a URL is passed as the data source) and the chart is drawn + * asynchronously. If the chart has already drawn, the callback will fire + * immediately. + * + * This is a good place to call setAnnotation(). + * + * @param {function(!Dygraph)} callback The callback to trigger when the chart + * is ready. + */ +Dygraph.prototype.ready = function(callback) { + if (this.is_initial_draw_) { + this.readyFns_.push(callback); + } else { + callback.call(this, this); + } +}; + +/** + * @private + * Adds a default style for the annotation CSS classes to the document. This is + * only executed when annotations are actually used. It is designed to only be + * called once -- all calls after the first will return immediately. + */ +Dygraph.addAnnotationRule = function() { + // TODO(danvk): move this function into plugins/annotations.js? + if (Dygraph.addedAnnotationCSS) return; + + var rule = "border: 1px solid black; " + + "background-color: white; " + + "text-align: center;"; + + var styleSheetElement = document.createElement("style"); + styleSheetElement.type = "text/css"; + document.getElementsByTagName("head")[0].appendChild(styleSheetElement); + + // Find the first style sheet that we can access. + // We may not add a rule to a style sheet from another domain for security + // reasons. This sometimes comes up when using gviz, since the Google gviz JS + // adds its own style sheets from google.com. + for (var i = 0; i < document.styleSheets.length; i++) { + if (document.styleSheets[i].disabled) continue; + var mysheet = document.styleSheets[i]; + try { + if (mysheet.insertRule) { // Firefox + var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; + mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); + } else if (mysheet.addRule) { // IE + mysheet.addRule(".dygraphDefaultAnnotation", rule); + } + Dygraph.addedAnnotationCSS = true; + return; + } catch(err) { + // Was likely a security exception. + } + } + + console.warn("Unable to add default annotation CSS rule; display may be off."); +}; + +return Dygraph; + +})(); +/** + * @license + * Copyright 2011 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview This file contains utility functions used by dygraphs. These + * are typically static (i.e. not related to any particular dygraph). Examples + * include date/time formatting functions, basic algorithms (e.g. binary + * search) and generic DOM-manipulation functions. + */ + +(function() { + +/*global Dygraph:false, G_vmlCanvasManager:false, Node:false */ +"use strict"; + +Dygraph.LOG_SCALE = 10; +Dygraph.LN_TEN = Math.log(Dygraph.LOG_SCALE); + +/** + * @private + * @param {number} x + * @return {number} + */ +Dygraph.log10 = function(x) { + return Math.log(x) / Dygraph.LN_TEN; +}; + +/** A dotted line stroke pattern. */ +Dygraph.DOTTED_LINE = [2, 2]; +/** A dashed line stroke pattern. */ +Dygraph.DASHED_LINE = [7, 3]; +/** A dot dash stroke pattern. */ +Dygraph.DOT_DASH_LINE = [7, 2, 2, 2]; + +/** + * Return the 2d context for a dygraph canvas. + * + * This method is only exposed for the sake of replacing the function in + * automated tests, e.g. + * + * var oldFunc = Dygraph.getContext(); + * Dygraph.getContext = function(canvas) { + * var realContext = oldFunc(canvas); + * return new Proxy(realContext); + * }; + * @param {!HTMLCanvasElement} canvas + * @return {!CanvasRenderingContext2D} + * @private + */ +Dygraph.getContext = function(canvas) { + return /** @type{!CanvasRenderingContext2D}*/(canvas.getContext("2d")); +}; + +/** + * Add an event handler. This smooths a difference between IE and the rest of + * the world. + * @param {!Node} elem The element to add the event to. + * @param {string} type The type of the event, e.g. 'click' or 'mousemove'. + * @param {function(Event):(boolean|undefined)} fn The function to call + * on the event. The function takes one parameter: the event object. + * @private + */ +Dygraph.addEvent = function addEvent(elem, type, fn) { + if (elem.addEventListener) { + elem.addEventListener(type, fn, false); + } else { + elem[type+fn] = function(){fn(window.event);}; + elem.attachEvent('on'+type, elem[type+fn]); + } +}; + +/** + * Add an event handler. This event handler is kept until the graph is + * destroyed with a call to graph.destroy(). + * + * @param {!Node} elem The element to add the event to. + * @param {string} type The type of the event, e.g. 'click' or 'mousemove'. + * @param {function(Event):(boolean|undefined)} fn The function to call + * on the event. The function takes one parameter: the event object. + * @private + */ +Dygraph.prototype.addAndTrackEvent = function(elem, type, fn) { + Dygraph.addEvent(elem, type, fn); + this.registeredEvents_.push({ elem : elem, type : type, fn : fn }); +}; + +/** + * Remove an event handler. This smooths a difference between IE and the rest + * of the world. + * @param {!Node} elem The element to remove the event from. + * @param {string} type The type of the event, e.g. 'click' or 'mousemove'. + * @param {function(Event):(boolean|undefined)} fn The function to call + * on the event. The function takes one parameter: the event object. + * @private + */ +Dygraph.removeEvent = function(elem, type, fn) { + if (elem.removeEventListener) { + elem.removeEventListener(type, fn, false); + } else { + try { + elem.detachEvent('on'+type, elem[type+fn]); + } catch(e) { + // We only detach event listeners on a "best effort" basis in IE. See: + // http://stackoverflow.com/questions/2553632/detachevent-not-working-with-named-inline-functions + } + elem[type+fn] = null; + } +}; + +Dygraph.prototype.removeTrackedEvents_ = function() { + if (this.registeredEvents_) { + for (var idx = 0; idx < this.registeredEvents_.length; idx++) { + var reg = this.registeredEvents_[idx]; + Dygraph.removeEvent(reg.elem, reg.type, reg.fn); + } + } + + this.registeredEvents_ = []; +}; + +/** + * Cancels further processing of an event. This is useful to prevent default + * browser actions, e.g. highlighting text on a double-click. + * Based on the article at + * http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel + * @param {!Event} e The event whose normal behavior should be canceled. + * @private + */ +Dygraph.cancelEvent = function(e) { + e = e ? e : window.event; + if (e.stopPropagation) { + e.stopPropagation(); + } + if (e.preventDefault) { + e.preventDefault(); + } + e.cancelBubble = true; + e.cancel = true; + e.returnValue = false; + return false; +}; + +/** + * Convert hsv values to an rgb(r,g,b) string. Taken from MochiKit.Color. This + * is used to generate default series colors which are evenly spaced on the + * color wheel. + * @param { number } hue Range is 0.0-1.0. + * @param { number } saturation Range is 0.0-1.0. + * @param { number } value Range is 0.0-1.0. + * @return { string } "rgb(r,g,b)" where r, g and b range from 0-255. + * @private + */ +Dygraph.hsvToRGB = function (hue, saturation, value) { + var red; + var green; + var blue; + if (saturation === 0) { + red = value; + green = value; + blue = value; + } else { + var i = Math.floor(hue * 6); + var f = (hue * 6) - i; + var p = value * (1 - saturation); + var q = value * (1 - (saturation * f)); + var t = value * (1 - (saturation * (1 - f))); + switch (i) { + case 1: red = q; green = value; blue = p; break; + case 2: red = p; green = value; blue = t; break; + case 3: red = p; green = q; blue = value; break; + case 4: red = t; green = p; blue = value; break; + case 5: red = value; green = p; blue = q; break; + case 6: // fall through + case 0: red = value; green = t; blue = p; break; + } + } + red = Math.floor(255 * red + 0.5); + green = Math.floor(255 * green + 0.5); + blue = Math.floor(255 * blue + 0.5); + return 'rgb(' + red + ',' + green + ',' + blue + ')'; +}; + +// The following functions are from quirksmode.org with a modification for Safari from +// http://blog.firetree.net/2005/07/04/javascript-find-position/ +// http://www.quirksmode.org/js/findpos.html +// ... and modifications to support scrolling divs. + +/** + * Find the coordinates of an object relative to the top left of the page. + * + * TODO(danvk): change obj type from Node -> !Node + * @param {Node} obj + * @return {{x:number,y:number}} + * @private + */ +Dygraph.findPos = function(obj) { + var curleft = 0, curtop = 0; + if (obj.offsetParent) { + var copyObj = obj; + while (1) { + // NOTE: the if statement here is for IE8. + var borderLeft = "0", borderTop = "0"; + if (window.getComputedStyle) { + var computedStyle = window.getComputedStyle(copyObj, null); + borderLeft = computedStyle.borderLeft || "0"; + borderTop = computedStyle.borderTop || "0"; + } + curleft += parseInt(borderLeft, 10) ; + curtop += parseInt(borderTop, 10) ; + curleft += copyObj.offsetLeft; + curtop += copyObj.offsetTop; + if (!copyObj.offsetParent) { + break; + } + copyObj = copyObj.offsetParent; + } + } else { + // TODO(danvk): why would obj ever have these properties? + if (obj.x) curleft += obj.x; + if (obj.y) curtop += obj.y; + } + + // This handles the case where the object is inside a scrolled div. + while (obj && obj != document.body) { + curleft -= obj.scrollLeft; + curtop -= obj.scrollTop; + obj = obj.parentNode; + } + return {x: curleft, y: curtop}; +}; + +/** + * Returns the x-coordinate of the event in a coordinate system where the + * top-left corner of the page (not the window) is (0,0). + * Taken from MochiKit.Signal + * @param {!Event} e + * @return {number} + * @private + */ +Dygraph.pageX = function(e) { + if (e.pageX) { + return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; + } else { + var de = document.documentElement; + var b = document.body; + return e.clientX + + (de.scrollLeft || b.scrollLeft) - + (de.clientLeft || 0); + } +}; + +/** + * Returns the y-coordinate of the event in a coordinate system where the + * top-left corner of the page (not the window) is (0,0). + * Taken from MochiKit.Signal + * @param {!Event} e + * @return {number} + * @private + */ +Dygraph.pageY = function(e) { + if (e.pageY) { + return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; + } else { + var de = document.documentElement; + var b = document.body; + return e.clientY + + (de.scrollTop || b.scrollTop) - + (de.clientTop || 0); + } +}; + +/** + * Converts page the x-coordinate of the event to pixel x-coordinates on the + * canvas (i.e. DOM Coords). + * @param {!Event} e Drag event. + * @param {!DygraphInteractionContext} context Interaction context object. + * @return {number} The amount by which the drag has moved to the right. + */ +Dygraph.dragGetX_ = function(e, context) { + return Dygraph.pageX(e) - context.px; +}; + +/** + * Converts page the y-coordinate of the event to pixel y-coordinates on the + * canvas (i.e. DOM Coords). + * @param {!Event} e Drag event. + * @param {!DygraphInteractionContext} context Interaction context object. + * @return {number} The amount by which the drag has moved down. + */ +Dygraph.dragGetY_ = function(e, context) { + return Dygraph.pageY(e) - context.py; +}; + +/** + * This returns true unless the parameter is 0, null, undefined or NaN. + * TODO(danvk): rename this function to something like 'isNonZeroNan'. + * + * @param {number} x The number to consider. + * @return {boolean} Whether the number is zero or NaN. + * @private + */ +Dygraph.isOK = function(x) { + return !!x && !isNaN(x); +}; + +/** + * @param {{x:?number,y:?number,yval:?number}} p The point to consider, valid + * points are {x, y} objects + * @param {boolean=} opt_allowNaNY Treat point with y=NaN as valid + * @return {boolean} Whether the point has numeric x and y. + * @private + */ +Dygraph.isValidPoint = function(p, opt_allowNaNY) { + if (!p) return false; // null or undefined object + if (p.yval === null) return false; // missing point + if (p.x === null || p.x === undefined) return false; + if (p.y === null || p.y === undefined) return false; + if (isNaN(p.x) || (!opt_allowNaNY && isNaN(p.y))) return false; + return true; +}; + +/** + * Number formatting function which mimicks the behavior of %g in printf, i.e. + * either exponential or fixed format (without trailing 0s) is used depending on + * the length of the generated string. The advantage of this format is that + * there is a predictable upper bound on the resulting string length, + * significant figures are not dropped, and normal numbers are not displayed in + * exponential notation. + * + * NOTE: JavaScript's native toPrecision() is NOT a drop-in replacement for %g. + * It creates strings which are too long for absolute values between 10^-4 and + * 10^-6, e.g. '0.00001' instead of '1e-5'. See tests/number-format.html for + * output examples. + * + * @param {number} x The number to format + * @param {number=} opt_precision The precision to use, default 2. + * @return {string} A string formatted like %g in printf. The max generated + * string length should be precision + 6 (e.g 1.123e+300). + */ +Dygraph.floatFormat = function(x, opt_precision) { + // Avoid invalid precision values; [1, 21] is the valid range. + var p = Math.min(Math.max(1, opt_precision || 2), 21); + + // This is deceptively simple. The actual algorithm comes from: + // + // Max allowed length = p + 4 + // where 4 comes from 'e+n' and '.'. + // + // Length of fixed format = 2 + y + p + // where 2 comes from '0.' and y = # of leading zeroes. + // + // Equating the two and solving for y yields y = 2, or 0.00xxxx which is + // 1.0e-3. + // + // Since the behavior of toPrecision() is identical for larger numbers, we + // don't have to worry about the other bound. + // + // Finally, the argument for toExponential() is the number of trailing digits, + // so we take off 1 for the value before the '.'. + return (Math.abs(x) < 1.0e-3 && x !== 0.0) ? + x.toExponential(p - 1) : x.toPrecision(p); +}; + +/** + * Converts '9' to '09' (useful for dates) + * @param {number} x + * @return {string} + * @private + */ +Dygraph.zeropad = function(x) { + if (x < 10) return "0" + x; else return "" + x; +}; + +/** + * Date accessors to get the parts of a calendar date (year, month, + * day, hour, minute, second and millisecond) according to local time, + * and factory method to call the Date constructor with an array of arguments. + */ +Dygraph.DateAccessorsLocal = { + getFullYear: function(d) {return d.getFullYear();}, + getMonth: function(d) {return d.getMonth();}, + getDate: function(d) {return d.getDate();}, + getHours: function(d) {return d.getHours();}, + getMinutes: function(d) {return d.getMinutes();}, + getSeconds: function(d) {return d.getSeconds();}, + getMilliseconds: function(d) {return d.getMilliseconds();}, + getDay: function(d) {return d.getDay();}, + makeDate: function(y, m, d, hh, mm, ss, ms) { + return new Date(y, m, d, hh, mm, ss, ms); + } +}; + +/** + * Date accessors to get the parts of a calendar date (year, month, + * day of month, hour, minute, second and millisecond) according to UTC time, + * and factory method to call the Date constructor with an array of arguments. + */ +Dygraph.DateAccessorsUTC = { + getFullYear: function(d) {return d.getUTCFullYear();}, + getMonth: function(d) {return d.getUTCMonth();}, + getDate: function(d) {return d.getUTCDate();}, + getHours: function(d) {return d.getUTCHours();}, + getMinutes: function(d) {return d.getUTCMinutes();}, + getSeconds: function(d) {return d.getUTCSeconds();}, + getMilliseconds: function(d) {return d.getUTCMilliseconds();}, + getDay: function(d) {return d.getUTCDay();}, + makeDate: function(y, m, d, hh, mm, ss, ms) { + return new Date(Date.UTC(y, m, d, hh, mm, ss, ms)); + } +}; + +/** + * Return a string version of the hours, minutes and seconds portion of a date. + * @param {number} hh The hours (from 0-23) + * @param {number} mm The minutes (from 0-59) + * @param {number} ss The seconds (from 0-59) + * @return {string} A time of the form "HH:MM" or "HH:MM:SS" + * @private + */ +Dygraph.hmsString_ = function(hh, mm, ss) { + var zeropad = Dygraph.zeropad; + var ret = zeropad(hh) + ":" + zeropad(mm); + if (ss) { + ret += ":" + zeropad(ss); + } + return ret; +}; + +/** + * Convert a JS date (millis since epoch) to a formatted string. + * @param {number} time The JavaScript time value (ms since epoch) + * @param {boolean} utc Wether output UTC or local time + * @return {string} A date of one of these forms: + * "YYYY/MM/DD", "YYYY/MM/DD HH:MM" or "YYYY/MM/DD HH:MM:SS" + * @private + */ +Dygraph.dateString_ = function(time, utc) { + var zeropad = Dygraph.zeropad; + var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal; + var date = new Date(time); + var y = accessors.getFullYear(date); + var m = accessors.getMonth(date); + var d = accessors.getDate(date); + var hh = accessors.getHours(date); + var mm = accessors.getMinutes(date); + var ss = accessors.getSeconds(date); + // Get a year string: + var year = "" + y; + // Get a 0 padded month string + var month = zeropad(m + 1); //months are 0-offset, sigh + // Get a 0 padded day string + var day = zeropad(d); + var frac = hh * 3600 + mm * 60 + ss; + var ret = year + "/" + month + "/" + day; + if (frac) { + ret += " " + Dygraph.hmsString_(hh, mm, ss); + } + return ret; +}; + +/** + * Round a number to the specified number of digits past the decimal point. + * @param {number} num The number to round + * @param {number} places The number of decimals to which to round + * @return {number} The rounded number + * @private + */ +Dygraph.round_ = function(num, places) { + var shift = Math.pow(10, places); + return Math.round(num * shift)/shift; +}; + +/** + * Implementation of binary search over an array. + * Currently does not work when val is outside the range of arry's values. + * @param {number} val the value to search for + * @param {Array.<number>} arry is the value over which to search + * @param {number} abs If abs > 0, find the lowest entry greater than val + * If abs < 0, find the highest entry less than val. + * If abs == 0, find the entry that equals val. + * @param {number=} low The first index in arry to consider (optional) + * @param {number=} high The last index in arry to consider (optional) + * @return {number} Index of the element, or -1 if it isn't found. + * @private + */ +Dygraph.binarySearch = function(val, arry, abs, low, high) { + if (low === null || low === undefined || + high === null || high === undefined) { + low = 0; + high = arry.length - 1; + } + if (low > high) { + return -1; + } + if (abs === null || abs === undefined) { + abs = 0; + } + var validIndex = function(idx) { + return idx >= 0 && idx < arry.length; + }; + var mid = parseInt((low + high) / 2, 10); + var element = arry[mid]; + var idx; + if (element == val) { + return mid; + } else if (element > val) { + if (abs > 0) { + // Accept if element > val, but also if prior element < val. + idx = mid - 1; + if (validIndex(idx) && arry[idx] < val) { + return mid; + } + } + return Dygraph.binarySearch(val, arry, abs, low, mid - 1); + } else if (element < val) { + if (abs < 0) { + // Accept if element < val, but also if prior element > val. + idx = mid + 1; + if (validIndex(idx) && arry[idx] > val) { + return mid; + } + } + return Dygraph.binarySearch(val, arry, abs, mid + 1, high); + } + return -1; // can't actually happen, but makes closure compiler happy +}; + +/** + * Parses a date, returning the number of milliseconds since epoch. This can be + * passed in as an xValueParser in the Dygraph constructor. + * TODO(danvk): enumerate formats that this understands. + * + * @param {string} dateStr A date in a variety of possible string formats. + * @return {number} Milliseconds since epoch. + * @private + */ +Dygraph.dateParser = function(dateStr) { + var dateStrSlashed; + var d; + + // Let the system try the format first, with one caveat: + // YYYY-MM-DD[ HH:MM:SS] is interpreted as UTC by a variety of browsers. + // dygraphs displays dates in local time, so this will result in surprising + // inconsistencies. But if you specify "T" or "Z" (i.e. YYYY-MM-DDTHH:MM:SS), + // then you probably know what you're doing, so we'll let you go ahead. + // Issue: http://code.google.com/p/dygraphs/issues/detail?id=255 + if (dateStr.search("-") == -1 || + dateStr.search("T") != -1 || dateStr.search("Z") != -1) { + d = Dygraph.dateStrToMillis(dateStr); + if (d && !isNaN(d)) return d; + } + + if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' + dateStrSlashed = dateStr.replace("-", "/", "g"); + while (dateStrSlashed.search("-") != -1) { + dateStrSlashed = dateStrSlashed.replace("-", "/"); + } + d = Dygraph.dateStrToMillis(dateStrSlashed); + } else if (dateStr.length == 8) { // e.g. '20090712' + // TODO(danvk): remove support for this format. It's confusing. + dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) + "/" + + dateStr.substr(6,2); + d = Dygraph.dateStrToMillis(dateStrSlashed); + } else { + // Any format that Date.parse will accept, e.g. "2009/07/12" or + // "2009/07/12 12:34:56" + d = Dygraph.dateStrToMillis(dateStr); + } + + if (!d || isNaN(d)) { + console.error("Couldn't parse " + dateStr + " as a date"); + } + return d; +}; + +/** + * This is identical to JavaScript's built-in Date.parse() method, except that + * it doesn't get replaced with an incompatible method by aggressive JS + * libraries like MooTools or Joomla. + * @param {string} str The date string, e.g. "2011/05/06" + * @return {number} millis since epoch + * @private + */ +Dygraph.dateStrToMillis = function(str) { + return new Date(str).getTime(); +}; + +// These functions are all based on MochiKit. +/** + * Copies all the properties from o to self. + * + * @param {!Object} self + * @param {!Object} o + * @return {!Object} + */ +Dygraph.update = function(self, o) { + if (typeof(o) != 'undefined' && o !== null) { + for (var k in o) { + if (o.hasOwnProperty(k)) { + self[k] = o[k]; + } + } + } + return self; +}; + +/** + * Copies all the properties from o to self. + * + * @param {!Object} self + * @param {!Object} o + * @return {!Object} + * @private + */ +Dygraph.updateDeep = function (self, o) { + // Taken from http://stackoverflow.com/questions/384286/javascript-isdom-how-do-you-check-if-a-javascript-object-is-a-dom-object + function isNode(o) { + return ( + typeof Node === "object" ? o instanceof Node : + typeof o === "object" && typeof o.nodeType === "number" && typeof o.nodeName==="string" + ); + } + + if (typeof(o) != 'undefined' && o !== null) { + for (var k in o) { + if (o.hasOwnProperty(k)) { + if (o[k] === null) { + self[k] = null; + } else if (Dygraph.isArrayLike(o[k])) { + self[k] = o[k].slice(); + } else if (isNode(o[k])) { + // DOM objects are shallowly-copied. + self[k] = o[k]; + } else if (typeof(o[k]) == 'object') { + if (typeof(self[k]) != 'object' || self[k] === null) { + self[k] = {}; + } + Dygraph.updateDeep(self[k], o[k]); + } else { + self[k] = o[k]; + } + } + } + } + return self; +}; + +/** + * @param {*} o + * @return {boolean} + * @private + */ +Dygraph.isArrayLike = function(o) { + var typ = typeof(o); + if ( + (typ != 'object' && !(typ == 'function' && + typeof(o.item) == 'function')) || + o === null || + typeof(o.length) != 'number' || + o.nodeType === 3 + ) { + return false; + } + return true; +}; + +/** + * @param {Object} o + * @return {boolean} + * @private + */ +Dygraph.isDateLike = function (o) { + if (typeof(o) != "object" || o === null || + typeof(o.getTime) != 'function') { + return false; + } + return true; +}; + +/** + * Note: this only seems to work for arrays. + * @param {!Array} o + * @return {!Array} + * @private + */ +Dygraph.clone = function(o) { + // TODO(danvk): figure out how MochiKit's version works + var r = []; + for (var i = 0; i < o.length; i++) { + if (Dygraph.isArrayLike(o[i])) { + r.push(Dygraph.clone(o[i])); + } else { + r.push(o[i]); + } + } + return r; +}; + +/** + * Create a new canvas element. This is more complex than a simple + * document.createElement("canvas") because of IE and excanvas. + * + * @return {!HTMLCanvasElement} + * @private + */ +Dygraph.createCanvas = function() { + var canvas = document.createElement("canvas"); + + var isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); + if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { + canvas = G_vmlCanvasManager.initElement( + /**@type{!HTMLCanvasElement}*/(canvas)); + } + + return canvas; +}; + +/** + * Returns the context's pixel ratio, which is the ratio between the device + * pixel ratio and the backing store ratio. Typically this is 1 for conventional + * displays, and > 1 for HiDPI displays (such as the Retina MBP). + * See http://www.html5rocks.com/en/tutorials/canvas/hidpi/ for more details. + * + * @param {!CanvasRenderingContext2D} context The canvas's 2d context. + * @return {number} The ratio of the device pixel ratio and the backing store + * ratio for the specified context. + */ +Dygraph.getContextPixelRatio = function(context) { + try { + var devicePixelRatio = window.devicePixelRatio; + var backingStoreRatio = context.webkitBackingStorePixelRatio || + context.mozBackingStorePixelRatio || + context.msBackingStorePixelRatio || + context.oBackingStorePixelRatio || + context.backingStorePixelRatio || 1; + if (devicePixelRatio !== undefined) { + return devicePixelRatio / backingStoreRatio; + } else { + // At least devicePixelRatio must be defined for this ratio to make sense. + // We default backingStoreRatio to 1: this does not exist on some browsers + // (i.e. desktop Chrome). + return 1; + } + } catch (e) { + return 1; + } +}; + +/** + * Checks whether the user is on an Android browser. + * Android does not fully support the <canvas> tag, e.g. w/r/t/ clipping. + * @return {boolean} + * @private + */ +Dygraph.isAndroid = function() { + return (/Android/).test(navigator.userAgent); +}; + + +/** + * TODO(danvk): use @template here when it's better supported for classes. + * @param {!Array} array + * @param {number} start + * @param {number} length + * @param {function(!Array,?):boolean=} predicate + * @constructor + */ +Dygraph.Iterator = function(array, start, length, predicate) { + start = start || 0; + length = length || array.length; + this.hasNext = true; // Use to identify if there's another element. + this.peek = null; // Use for look-ahead + this.start_ = start; + this.array_ = array; + this.predicate_ = predicate; + this.end_ = Math.min(array.length, start + length); + this.nextIdx_ = start - 1; // use -1 so initial advance works. + this.next(); // ignoring result. +}; + +/** + * @return {Object} + */ +Dygraph.Iterator.prototype.next = function() { + if (!this.hasNext) { + return null; + } + var obj = this.peek; + + var nextIdx = this.nextIdx_ + 1; + var found = false; + while (nextIdx < this.end_) { + if (!this.predicate_ || this.predicate_(this.array_, nextIdx)) { + this.peek = this.array_[nextIdx]; + found = true; + break; + } + nextIdx++; + } + this.nextIdx_ = nextIdx; + if (!found) { + this.hasNext = false; + this.peek = null; + } + return obj; +}; + +/** + * Returns a new iterator over array, between indexes start and + * start + length, and only returns entries that pass the accept function + * + * @param {!Array} array the array to iterate over. + * @param {number} start the first index to iterate over, 0 if absent. + * @param {number} length the number of elements in the array to iterate over. + * This, along with start, defines a slice of the array, and so length + * doesn't imply the number of elements in the iterator when accept doesn't + * always accept all values. array.length when absent. + * @param {function(?):boolean=} opt_predicate a function that takes + * parameters array and idx, which returns true when the element should be + * returned. If omitted, all elements are accepted. + * @private + */ +Dygraph.createIterator = function(array, start, length, opt_predicate) { + return new Dygraph.Iterator(array, start, length, opt_predicate); +}; + +// Shim layer with setTimeout fallback. +// From: http://paulirish.com/2011/requestanimationframe-for-smart-animating/ +// Should be called with the window context: +// Dygraph.requestAnimFrame.call(window, function() {}) +Dygraph.requestAnimFrame = (function() { + return window.requestAnimationFrame || + window.webkitRequestAnimationFrame || + window.mozRequestAnimationFrame || + window.oRequestAnimationFrame || + window.msRequestAnimationFrame || + function (callback) { + window.setTimeout(callback, 1000 / 60); + }; +})(); + +/** + * Call a function at most maxFrames times at an attempted interval of + * framePeriodInMillis, then call a cleanup function once. repeatFn is called + * once immediately, then at most (maxFrames - 1) times asynchronously. If + * maxFrames==1, then cleanup_fn() is also called synchronously. This function + * is used to sequence animation. + * @param {function(number)} repeatFn Called repeatedly -- takes the frame + * number (from 0 to maxFrames-1) as an argument. + * @param {number} maxFrames The max number of times to call repeatFn + * @param {number} framePeriodInMillis Max requested time between frames. + * @param {function()} cleanupFn A function to call after all repeatFn calls. + * @private + */ +Dygraph.repeatAndCleanup = function(repeatFn, maxFrames, framePeriodInMillis, + cleanupFn) { + var frameNumber = 0; + var previousFrameNumber; + var startTime = new Date().getTime(); + repeatFn(frameNumber); + if (maxFrames == 1) { + cleanupFn(); + return; + } + var maxFrameArg = maxFrames - 1; + + (function loop() { + if (frameNumber >= maxFrames) return; + Dygraph.requestAnimFrame.call(window, function() { + // Determine which frame to draw based on the delay so far. Will skip + // frames if necessary. + var currentTime = new Date().getTime(); + var delayInMillis = currentTime - startTime; + previousFrameNumber = frameNumber; + frameNumber = Math.floor(delayInMillis / framePeriodInMillis); + var frameDelta = frameNumber - previousFrameNumber; + // If we predict that the subsequent repeatFn call will overshoot our + // total frame target, so our last call will cause a stutter, then jump to + // the last call immediately. If we're going to cause a stutter, better + // to do it faster than slower. + var predictOvershootStutter = (frameNumber + frameDelta) > maxFrameArg; + if (predictOvershootStutter || (frameNumber >= maxFrameArg)) { + repeatFn(maxFrameArg); // Ensure final call with maxFrameArg. + cleanupFn(); + } else { + if (frameDelta !== 0) { // Don't call repeatFn with duplicate frames. + repeatFn(frameNumber); + } + loop(); + } + }); + })(); +}; + +// A whitelist of options that do not change pixel positions. +var pixelSafeOptions = { + 'annotationClickHandler': true, + 'annotationDblClickHandler': true, + 'annotationMouseOutHandler': true, + 'annotationMouseOverHandler': true, + 'axisLabelColor': true, + 'axisLineColor': true, + 'axisLineWidth': true, + 'clickCallback': true, + 'drawCallback': true, + 'drawHighlightPointCallback': true, + 'drawPoints': true, + 'drawPointCallback': true, + 'drawXGrid': true, + 'drawYGrid': true, + 'fillAlpha': true, + 'gridLineColor': true, + 'gridLineWidth': true, + 'hideOverlayOnMouseOut': true, + 'highlightCallback': true, + 'highlightCircleSize': true, + 'interactionModel': true, + 'isZoomedIgnoreProgrammaticZoom': true, + 'labelsDiv': true, + 'labelsDivStyles': true, + 'labelsDivWidth': true, + 'labelsKMB': true, + 'labelsKMG2': true, + 'labelsSeparateLines': true, + 'labelsShowZeroValues': true, + 'legend': true, + 'panEdgeFraction': true, + 'pixelsPerYLabel': true, + 'pointClickCallback': true, + 'pointSize': true, + 'rangeSelectorPlotFillColor': true, + 'rangeSelectorPlotStrokeColor': true, + 'showLabelsOnHighlight': true, + 'showRoller': true, + 'strokeWidth': true, + 'underlayCallback': true, + 'unhighlightCallback': true, + 'zoomCallback': true +}; + +/** + * This function will scan the option list and determine if they + * require us to recalculate the pixel positions of each point. + * TODO: move this into dygraph-options.js + * @param {!Array.<string>} labels a list of options to check. + * @param {!Object} attrs + * @return {boolean} true if the graph needs new points else false. + * @private + */ +Dygraph.isPixelChangingOptionList = function(labels, attrs) { + // Assume that we do not require new points. + // This will change to true if we actually do need new points. + + // Create a dictionary of series names for faster lookup. + // If there are no labels, then the dictionary stays empty. + var seriesNamesDictionary = { }; + if (labels) { + for (var i = 1; i < labels.length; i++) { + seriesNamesDictionary[labels[i]] = true; + } + } + + // Scan through a flat (i.e. non-nested) object of options. + // Returns true/false depending on whether new points are needed. + var scanFlatOptions = function(options) { + for (var property in options) { + if (options.hasOwnProperty(property) && + !pixelSafeOptions[property]) { + return true; + } + } + return false; + }; + + // Iterate through the list of updated options. + for (var property in attrs) { + if (!attrs.hasOwnProperty(property)) continue; + + // Find out of this field is actually a series specific options list. + if (property == 'highlightSeriesOpts' || + (seriesNamesDictionary[property] && !attrs.series)) { + // This property value is a list of options for this series. + if (scanFlatOptions(attrs[property])) return true; + } else if (property == 'series' || property == 'axes') { + // This is twice-nested options list. + var perSeries = attrs[property]; + for (var series in perSeries) { + if (perSeries.hasOwnProperty(series) && + scanFlatOptions(perSeries[series])) { + return true; + } + } + } else { + // If this was not a series specific option list, check if it's a pixel + // changing property. + if (!pixelSafeOptions[property]) return true; + } + } + + return false; +}; + +Dygraph.Circles = { + DEFAULT : function(g, name, ctx, canvasx, canvasy, color, radius) { + ctx.beginPath(); + ctx.fillStyle = color; + ctx.arc(canvasx, canvasy, radius, 0, 2 * Math.PI, false); + ctx.fill(); + } + // For more shapes, include extras/shapes.js +}; + +/** + * To create a "drag" interaction, you typically register a mousedown event + * handler on the element where the drag begins. In that handler, you register a + * mouseup handler on the window to determine when the mouse is released, + * wherever that release happens. This works well, except when the user releases + * the mouse over an off-domain iframe. In that case, the mouseup event is + * handled by the iframe and never bubbles up to the window handler. + * + * To deal with this issue, we cover iframes with high z-index divs to make sure + * they don't capture mouseup. + * + * Usage: + * element.addEventListener('mousedown', function() { + * var tarper = new Dygraph.IFrameTarp(); + * tarper.cover(); + * var mouseUpHandler = function() { + * ... + * window.removeEventListener(mouseUpHandler); + * tarper.uncover(); + * }; + * window.addEventListener('mouseup', mouseUpHandler); + * }; + * + * @constructor + */ +Dygraph.IFrameTarp = function() { + /** @type {Array.<!HTMLDivElement>} */ + this.tarps = []; +}; + +/** + * Find all the iframes in the document and cover them with high z-index + * transparent divs. + */ +Dygraph.IFrameTarp.prototype.cover = function() { + var iframes = document.getElementsByTagName("iframe"); + for (var i = 0; i < iframes.length; i++) { + var iframe = iframes[i]; + var pos = Dygraph.findPos(iframe), + x = pos.x, + y = pos.y, + width = iframe.offsetWidth, + height = iframe.offsetHeight; + + var div = document.createElement("div"); + div.style.position = "absolute"; + div.style.left = x + 'px'; + div.style.top = y + 'px'; + div.style.width = width + 'px'; + div.style.height = height + 'px'; + div.style.zIndex = 999; + document.body.appendChild(div); + this.tarps.push(div); + } +}; + +/** + * Remove all the iframe covers. You should call this in a mouseup handler. + */ +Dygraph.IFrameTarp.prototype.uncover = function() { + for (var i = 0; i < this.tarps.length; i++) { + this.tarps[i].parentNode.removeChild(this.tarps[i]); + } + this.tarps = []; +}; + +/** + * Determine whether |data| is delimited by CR, CRLF, LF, LFCR. + * @param {string} data + * @return {?string} the delimiter that was detected (or null on failure). + */ +Dygraph.detectLineDelimiter = function(data) { + for (var i = 0; i < data.length; i++) { + var code = data.charAt(i); + if (code === '\r') { + // Might actually be "\r\n". + if (((i + 1) < data.length) && (data.charAt(i + 1) === '\n')) { + return '\r\n'; + } + return code; + } + if (code === '\n') { + // Might actually be "\n\r". + if (((i + 1) < data.length) && (data.charAt(i + 1) === '\r')) { + return '\n\r'; + } + return code; + } + } + + return null; +}; + +/** + * Is one node contained by another? + * @param {Node} containee The contained node. + * @param {Node} container The container node. + * @return {boolean} Whether containee is inside (or equal to) container. + * @private + */ +Dygraph.isNodeContainedBy = function(containee, container) { + if (container === null || containee === null) { + return false; + } + var containeeNode = /** @type {Node} */ (containee); + while (containeeNode && containeeNode !== container) { + containeeNode = containeeNode.parentNode; + } + return (containeeNode === container); +}; + + +// This masks some numeric issues in older versions of Firefox, +// where 1.0/Math.pow(10,2) != Math.pow(10,-2). +/** @type {function(number,number):number} */ +Dygraph.pow = function(base, exp) { + if (exp < 0) { + return 1.0 / Math.pow(base, -exp); + } + return Math.pow(base, exp); +}; + +/** + * Converts any valid CSS color (hex, rgb(), named color) to an RGB tuple. + * + * @param {!string} colorStr Any valid CSS color string. + * @return {{r:number,g:number,b:number}} Parsed RGB tuple. + * @private + */ +Dygraph.toRGB_ = function(colorStr) { + // TODO(danvk): cache color parses to avoid repeated DOM manipulation. + var div = document.createElement('div'); + div.style.backgroundColor = colorStr; + div.style.visibility = 'hidden'; + document.body.appendChild(div); + var rgbStr; + if (window.getComputedStyle) { + rgbStr = window.getComputedStyle(div, null).backgroundColor; + } else { + // IE8 + rgbStr = div.currentStyle.backgroundColor; + } + document.body.removeChild(div); + var bits = /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/.exec(rgbStr); + return { + r: parseInt(bits[1], 10), + g: parseInt(bits[2], 10), + b: parseInt(bits[3], 10) + }; +}; + +/** + * Checks whether the browser supports the <canvas> tag. + * @param {HTMLCanvasElement=} opt_canvasElement Pass a canvas element as an + * optimization if you have one. + * @return {boolean} Whether the browser supports canvas. + */ +Dygraph.isCanvasSupported = function(opt_canvasElement) { + var canvas; + try { + canvas = opt_canvasElement || document.createElement("canvas"); + canvas.getContext("2d"); + } + catch (e) { + var ie = navigator.appVersion.match(/MSIE (\d\.\d)/); + var opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1); + if ((!ie) || (ie[1] < 6) || (opera)) + return false; + return true; + } + return true; +}; + +/** + * Parses the value as a floating point number. This is like the parseFloat() + * built-in, but with a few differences: + * - the empty string is parsed as null, rather than NaN. + * - if the string cannot be parsed at all, an error is logged. + * If the string can't be parsed, this method returns null. + * @param {string} x The string to be parsed + * @param {number=} opt_line_no The line number from which the string comes. + * @param {string=} opt_line The text of the line from which the string comes. + */ +Dygraph.parseFloat_ = function(x, opt_line_no, opt_line) { + var val = parseFloat(x); + if (!isNaN(val)) return val; + + // Try to figure out what happeend. + // If the value is the empty string, parse it as null. + if (/^ *$/.test(x)) return null; + + // If it was actually "NaN", return it as NaN. + if (/^ *nan *$/i.test(x)) return NaN; + + // Looks like a parsing error. + var msg = "Unable to parse '" + x + "' as a number"; + if (opt_line !== undefined && opt_line_no !== undefined) { + msg += " on line " + (1+(opt_line_no||0)) + " ('" + opt_line + "') of CSV."; + } + console.error(msg); + + return null; +}; + +})(); +/** + * @license + * Copyright 2011 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview A wrapper around the Dygraph class which implements the + * interface for a GViz (aka Google Visualization API) visualization. + * It is designed to be a drop-in replacement for Google's AnnotatedTimeline, + * so the documentation at + * http://code.google.com/apis/chart/interactive/docs/gallery/annotatedtimeline.html + * translates over directly. + * + * For a full demo, see: + * - http://dygraphs.com/tests/gviz.html + * - http://dygraphs.com/tests/annotation-gviz.html + */ + +(function() { +/*global Dygraph:false */ +"use strict"; + +/** + * A wrapper around Dygraph that implements the gviz API. + * @param {!HTMLDivElement} container The DOM object the visualization should + * live in. + * @constructor + */ +Dygraph.GVizChart = function(container) { + this.container = container; +}; + +/** + * @param {GVizDataTable} data + * @param {Object.<*>} options + */ +Dygraph.GVizChart.prototype.draw = function(data, options) { + // Clear out any existing dygraph. + // TODO(danvk): would it make more sense to simply redraw using the current + // date_graph object? + this.container.innerHTML = ''; + if (typeof(this.date_graph) != 'undefined') { + this.date_graph.destroy(); + } + + this.date_graph = new Dygraph(this.container, data, options); +}; + +/** + * Google charts compatible setSelection + * Only row selection is supported, all points in the row will be highlighted + * @param {Array.<{row:number}>} selection_array array of the selected cells + * @public + */ +Dygraph.GVizChart.prototype.setSelection = function(selection_array) { + var row = false; + if (selection_array.length) { + row = selection_array[0].row; + } + this.date_graph.setSelection(row); +}; + +/** + * Google charts compatible getSelection implementation + * @return {Array.<{row:number,column:number}>} array of the selected cells + * @public + */ +Dygraph.GVizChart.prototype.getSelection = function() { + var selection = []; + + var row = this.date_graph.getSelection(); + + if (row < 0) return selection; + + var points = this.date_graph.layout_.points; + for (var setIdx = 0; setIdx < points.length; ++setIdx) { + selection.push({row: row, column: setIdx + 1}); + } + + return selection; +}; + +})(); +/** + * @license + * Copyright 2011 Robert Konigsberg (konigsberg@google.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview The default interaction model for Dygraphs. This is kept out + * of dygraph.js for better navigability. + * @author Robert Konigsberg (konigsberg@google.com) + */ + +(function() { +/*global Dygraph:false */ +"use strict"; + +/** + * You can drag this many pixels past the edge of the chart and still have it + * be considered a zoom. This makes it easier to zoom to the exact edge of the + * chart, a fairly common operation. + */ +var DRAG_EDGE_MARGIN = 100; + +/** + * A collection of functions to facilitate build custom interaction models. + * @class + */ +Dygraph.Interaction = {}; + +/** + * Checks whether the beginning & ending of an event were close enough that it + * should be considered a click. If it should, dispatch appropriate events. + * Returns true if the event was treated as a click. + * + * @param {Event} event + * @param {Dygraph} g + * @param {Object} context + */ +Dygraph.Interaction.maybeTreatMouseOpAsClick = function(event, g, context) { + context.dragEndX = Dygraph.dragGetX_(event, context); + context.dragEndY = Dygraph.dragGetY_(event, context); + var regionWidth = Math.abs(context.dragEndX - context.dragStartX); + var regionHeight = Math.abs(context.dragEndY - context.dragStartY); + + if (regionWidth < 2 && regionHeight < 2 && + g.lastx_ !== undefined && g.lastx_ != -1) { + Dygraph.Interaction.treatMouseOpAsClick(g, event, context); + } + + context.regionWidth = regionWidth; + context.regionHeight = regionHeight; +}; + +/** + * Called in response to an interaction model operation that + * should start the default panning behavior. + * + * It's used in the default callback for "mousedown" operations. + * Custom interaction model builders can use it to provide the default + * panning behavior. + * + * @param {Event} event the event object which led to the startPan call. + * @param {Dygraph} g The dygraph on which to act. + * @param {Object} context The dragging context object (with + * dragStartX/dragStartY/etc. properties). This function modifies the + * context. + */ +Dygraph.Interaction.startPan = function(event, g, context) { + var i, axis; + context.isPanning = true; + var xRange = g.xAxisRange(); + + if (g.getOptionForAxis("logscale", "x")) { + context.initialLeftmostDate = Dygraph.log10(xRange[0]); + context.dateRange = Dygraph.log10(xRange[1]) - Dygraph.log10(xRange[0]); + } else { + context.initialLeftmostDate = xRange[0]; + context.dateRange = xRange[1] - xRange[0]; + } + context.xUnitsPerPixel = context.dateRange / (g.plotter_.area.w - 1); + + if (g.getNumericOption("panEdgeFraction")) { + var maxXPixelsToDraw = g.width_ * g.getNumericOption("panEdgeFraction"); + var xExtremes = g.xAxisExtremes(); // I REALLY WANT TO CALL THIS xTremes! + + var boundedLeftX = g.toDomXCoord(xExtremes[0]) - maxXPixelsToDraw; + var boundedRightX = g.toDomXCoord(xExtremes[1]) + maxXPixelsToDraw; + + var boundedLeftDate = g.toDataXCoord(boundedLeftX); + var boundedRightDate = g.toDataXCoord(boundedRightX); + context.boundedDates = [boundedLeftDate, boundedRightDate]; + + var boundedValues = []; + var maxYPixelsToDraw = g.height_ * g.getNumericOption("panEdgeFraction"); + + for (i = 0; i < g.axes_.length; i++) { + axis = g.axes_[i]; + var yExtremes = axis.extremeRange; + + var boundedTopY = g.toDomYCoord(yExtremes[0], i) + maxYPixelsToDraw; + var boundedBottomY = g.toDomYCoord(yExtremes[1], i) - maxYPixelsToDraw; + + var boundedTopValue = g.toDataYCoord(boundedTopY, i); + var boundedBottomValue = g.toDataYCoord(boundedBottomY, i); + + boundedValues[i] = [boundedTopValue, boundedBottomValue]; + } + context.boundedValues = boundedValues; + } + + // Record the range of each y-axis at the start of the drag. + // If any axis has a valueRange or valueWindow, then we want a 2D pan. + // We can't store data directly in g.axes_, because it does not belong to us + // and could change out from under us during a pan (say if there's a data + // update). + context.is2DPan = false; + context.axes = []; + for (i = 0; i < g.axes_.length; i++) { + axis = g.axes_[i]; + var axis_data = {}; + var yRange = g.yAxisRange(i); + // TODO(konigsberg): These values should be in |context|. + // In log scale, initialTopValue, dragValueRange and unitsPerPixel are log scale. + var logscale = g.attributes_.getForAxis("logscale", i); + if (logscale) { + axis_data.initialTopValue = Dygraph.log10(yRange[1]); + axis_data.dragValueRange = Dygraph.log10(yRange[1]) - Dygraph.log10(yRange[0]); + } else { + axis_data.initialTopValue = yRange[1]; + axis_data.dragValueRange = yRange[1] - yRange[0]; + } + axis_data.unitsPerPixel = axis_data.dragValueRange / (g.plotter_.area.h - 1); + context.axes.push(axis_data); + + // While calculating axes, set 2dpan. + if (axis.valueWindow || axis.valueRange) context.is2DPan = true; + } +}; + +/** + * Called in response to an interaction model operation that + * responds to an event that pans the view. + * + * It's used in the default callback for "mousemove" operations. + * Custom interaction model builders can use it to provide the default + * panning behavior. + * + * @param {Event} event the event object which led to the movePan call. + * @param {Dygraph} g The dygraph on which to act. + * @param {Object} context The dragging context object (with + * dragStartX/dragStartY/etc. properties). This function modifies the + * context. + */ +Dygraph.Interaction.movePan = function(event, g, context) { + context.dragEndX = Dygraph.dragGetX_(event, context); + context.dragEndY = Dygraph.dragGetY_(event, context); + + var minDate = context.initialLeftmostDate - + (context.dragEndX - context.dragStartX) * context.xUnitsPerPixel; + if (context.boundedDates) { + minDate = Math.max(minDate, context.boundedDates[0]); + } + var maxDate = minDate + context.dateRange; + if (context.boundedDates) { + if (maxDate > context.boundedDates[1]) { + // Adjust minDate, and recompute maxDate. + minDate = minDate - (maxDate - context.boundedDates[1]); + maxDate = minDate + context.dateRange; + } + } + + if (g.getOptionForAxis("logscale", "x")) { + g.dateWindow_ = [ Math.pow(Dygraph.LOG_SCALE, minDate), + Math.pow(Dygraph.LOG_SCALE, maxDate) ]; + } else { + g.dateWindow_ = [minDate, maxDate]; + } + + // y-axis scaling is automatic unless this is a full 2D pan. + if (context.is2DPan) { + + var pixelsDragged = context.dragEndY - context.dragStartY; + + // Adjust each axis appropriately. + for (var i = 0; i < g.axes_.length; i++) { + var axis = g.axes_[i]; + var axis_data = context.axes[i]; + var unitsDragged = pixelsDragged * axis_data.unitsPerPixel; + + var boundedValue = context.boundedValues ? context.boundedValues[i] : null; + + // In log scale, maxValue and minValue are the logs of those values. + var maxValue = axis_data.initialTopValue + unitsDragged; + if (boundedValue) { + maxValue = Math.min(maxValue, boundedValue[1]); + } + var minValue = maxValue - axis_data.dragValueRange; + if (boundedValue) { + if (minValue < boundedValue[0]) { + // Adjust maxValue, and recompute minValue. + maxValue = maxValue - (minValue - boundedValue[0]); + minValue = maxValue - axis_data.dragValueRange; + } + } + if (g.attributes_.getForAxis("logscale", i)) { + axis.valueWindow = [ Math.pow(Dygraph.LOG_SCALE, minValue), + Math.pow(Dygraph.LOG_SCALE, maxValue) ]; + } else { + axis.valueWindow = [ minValue, maxValue ]; + } + } + } + + g.drawGraph_(false); +}; + +/** + * Called in response to an interaction model operation that + * responds to an event that ends panning. + * + * It's used in the default callback for "mouseup" operations. + * Custom interaction model builders can use it to provide the default + * panning behavior. + * + * @param {Event} event the event object which led to the endPan call. + * @param {Dygraph} g The dygraph on which to act. + * @param {Object} context The dragging context object (with + * dragStartX/dragStartY/etc. properties). This function modifies the + * context. + */ +Dygraph.Interaction.endPan = Dygraph.Interaction.maybeTreatMouseOpAsClick; + +/** + * Called in response to an interaction model operation that + * responds to an event that starts zooming. + * + * It's used in the default callback for "mousedown" operations. + * Custom interaction model builders can use it to provide the default + * zooming behavior. + * + * @param {Event} event the event object which led to the startZoom call. + * @param {Dygraph} g The dygraph on which to act. + * @param {Object} context The dragging context object (with + * dragStartX/dragStartY/etc. properties). This function modifies the + * context. + */ +Dygraph.Interaction.startZoom = function(event, g, context) { + context.isZooming = true; + context.zoomMoved = false; +}; + +/** + * Called in response to an interaction model operation that + * responds to an event that defines zoom boundaries. + * + * It's used in the default callback for "mousemove" operations. + * Custom interaction model builders can use it to provide the default + * zooming behavior. + * + * @param {Event} event the event object which led to the moveZoom call. + * @param {Dygraph} g The dygraph on which to act. + * @param {Object} context The dragging context object (with + * dragStartX/dragStartY/etc. properties). This function modifies the + * context. + */ +Dygraph.Interaction.moveZoom = function(event, g, context) { + context.zoomMoved = true; + context.dragEndX = Dygraph.dragGetX_(event, context); + context.dragEndY = Dygraph.dragGetY_(event, context); + + var xDelta = Math.abs(context.dragStartX - context.dragEndX); + var yDelta = Math.abs(context.dragStartY - context.dragEndY); + + // drag direction threshold for y axis is twice as large as x axis + context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; + + g.drawZoomRect_( + context.dragDirection, + context.dragStartX, + context.dragEndX, + context.dragStartY, + context.dragEndY, + context.prevDragDirection, + context.prevEndX, + context.prevEndY); + + context.prevEndX = context.dragEndX; + context.prevEndY = context.dragEndY; + context.prevDragDirection = context.dragDirection; +}; + +/** + * TODO(danvk): move this logic into dygraph.js + * @param {Dygraph} g + * @param {Event} event + * @param {Object} context + */ +Dygraph.Interaction.treatMouseOpAsClick = function(g, event, context) { + var clickCallback = g.getFunctionOption('clickCallback'); + var pointClickCallback = g.getFunctionOption('pointClickCallback'); + + var selectedPoint = null; + + // Find out if the click occurs on a point. + var closestIdx = -1; + var closestDistance = Number.MAX_VALUE; + + // check if the click was on a particular point. + for (var i = 0; i < g.selPoints_.length; i++) { + var p = g.selPoints_[i]; + var distance = Math.pow(p.canvasx - context.dragEndX, 2) + + Math.pow(p.canvasy - context.dragEndY, 2); + if (!isNaN(distance) && + (closestIdx == -1 || distance < closestDistance)) { + closestDistance = distance; + closestIdx = i; + } + } + + // Allow any click within two pixels of the dot. + var radius = g.getNumericOption('highlightCircleSize') + 2; + if (closestDistance <= radius * radius) { + selectedPoint = g.selPoints_[closestIdx]; + } + + if (selectedPoint) { + var e = { + cancelable: true, + point: selectedPoint, + canvasx: context.dragEndX, + canvasy: context.dragEndY + }; + var defaultPrevented = g.cascadeEvents_('pointClick', e); + if (defaultPrevented) { + // Note: this also prevents click / clickCallback from firing. + return; + } + if (pointClickCallback) { + pointClickCallback.call(g, event, selectedPoint); + } + } + + var e = { + cancelable: true, + xval: g.lastx_, // closest point by x value + pts: g.selPoints_, + canvasx: context.dragEndX, + canvasy: context.dragEndY + }; + if (!g.cascadeEvents_('click', e)) { + if (clickCallback) { + // TODO(danvk): pass along more info about the points, e.g. 'x' + clickCallback.call(g, event, g.lastx_, g.selPoints_); + } + } +}; + +/** + * Called in response to an interaction model operation that + * responds to an event that performs a zoom based on previously defined + * bounds.. + * + * It's used in the default callback for "mouseup" operations. + * Custom interaction model builders can use it to provide the default + * zooming behavior. + * + * @param {Event} event the event object which led to the endZoom call. + * @param {Dygraph} g The dygraph on which to end the zoom. + * @param {Object} context The dragging context object (with + * dragStartX/dragStartY/etc. properties). This function modifies the + * context. + */ +Dygraph.Interaction.endZoom = function(event, g, context) { + g.clearZoomRect_(); + context.isZooming = false; + Dygraph.Interaction.maybeTreatMouseOpAsClick(event, g, context); + + // The zoom rectangle is visibly clipped to the plot area, so its behavior + // should be as well. + // See http://code.google.com/p/dygraphs/issues/detail?id=280 + var plotArea = g.getArea(); + if (context.regionWidth >= 10 && + context.dragDirection == Dygraph.HORIZONTAL) { + var left = Math.min(context.dragStartX, context.dragEndX), + right = Math.max(context.dragStartX, context.dragEndX); + left = Math.max(left, plotArea.x); + right = Math.min(right, plotArea.x + plotArea.w); + if (left < right) { + g.doZoomX_(left, right); + } + context.cancelNextDblclick = true; + } else if (context.regionHeight >= 10 && + context.dragDirection == Dygraph.VERTICAL) { + var top = Math.min(context.dragStartY, context.dragEndY), + bottom = Math.max(context.dragStartY, context.dragEndY); + top = Math.max(top, plotArea.y); + bottom = Math.min(bottom, plotArea.y + plotArea.h); + if (top < bottom) { + g.doZoomY_(top, bottom); + } + context.cancelNextDblclick = true; + } + context.dragStartX = null; + context.dragStartY = null; +}; + +/** + * @private + */ +Dygraph.Interaction.startTouch = function(event, g, context) { + event.preventDefault(); // touch browsers are all nice. + if (event.touches.length > 1) { + // If the user ever puts two fingers down, it's not a double tap. + context.startTimeForDoubleTapMs = null; + } + + var touches = []; + for (var i = 0; i < event.touches.length; i++) { + var t = event.touches[i]; + // we dispense with 'dragGetX_' because all touchBrowsers support pageX + touches.push({ + pageX: t.pageX, + pageY: t.pageY, + dataX: g.toDataXCoord(t.pageX), + dataY: g.toDataYCoord(t.pageY) + // identifier: t.identifier + }); + } + context.initialTouches = touches; + + if (touches.length == 1) { + // This is just a swipe. + context.initialPinchCenter = touches[0]; + context.touchDirections = { x: true, y: true }; + } else if (touches.length >= 2) { + // It's become a pinch! + // In case there are 3+ touches, we ignore all but the "first" two. + + // only screen coordinates can be averaged (data coords could be log scale). + context.initialPinchCenter = { + pageX: 0.5 * (touches[0].pageX + touches[1].pageX), + pageY: 0.5 * (touches[0].pageY + touches[1].pageY), + + // TODO(danvk): remove + dataX: 0.5 * (touches[0].dataX + touches[1].dataX), + dataY: 0.5 * (touches[0].dataY + touches[1].dataY) + }; + + // Make pinches in a 45-degree swath around either axis 1-dimensional zooms. + var initialAngle = 180 / Math.PI * Math.atan2( + context.initialPinchCenter.pageY - touches[0].pageY, + touches[0].pageX - context.initialPinchCenter.pageX); + + // use symmetry to get it into the first quadrant. + initialAngle = Math.abs(initialAngle); + if (initialAngle > 90) initialAngle = 90 - initialAngle; + + context.touchDirections = { + x: (initialAngle < (90 - 45/2)), + y: (initialAngle > 45/2) + }; + } + + // save the full x & y ranges. + context.initialRange = { + x: g.xAxisRange(), + y: g.yAxisRange() + }; +}; + +/** + * @private + */ +Dygraph.Interaction.moveTouch = function(event, g, context) { + // If the tap moves, then it's definitely not part of a double-tap. + context.startTimeForDoubleTapMs = null; + + var i, touches = []; + for (i = 0; i < event.touches.length; i++) { + var t = event.touches[i]; + touches.push({ + pageX: t.pageX, + pageY: t.pageY + }); + } + var initialTouches = context.initialTouches; + + var c_now; + + // old and new centers. + var c_init = context.initialPinchCenter; + if (touches.length == 1) { + c_now = touches[0]; + } else { + c_now = { + pageX: 0.5 * (touches[0].pageX + touches[1].pageX), + pageY: 0.5 * (touches[0].pageY + touches[1].pageY) + }; + } + + // this is the "swipe" component + // we toss it out for now, but could use it in the future. + var swipe = { + pageX: c_now.pageX - c_init.pageX, + pageY: c_now.pageY - c_init.pageY + }; + var dataWidth = context.initialRange.x[1] - context.initialRange.x[0]; + var dataHeight = context.initialRange.y[0] - context.initialRange.y[1]; + swipe.dataX = (swipe.pageX / g.plotter_.area.w) * dataWidth; + swipe.dataY = (swipe.pageY / g.plotter_.area.h) * dataHeight; + var xScale, yScale; + + // The residual bits are usually split into scale & rotate bits, but we split + // them into x-scale and y-scale bits. + if (touches.length == 1) { + xScale = 1.0; + yScale = 1.0; + } else if (touches.length >= 2) { + var initHalfWidth = (initialTouches[1].pageX - c_init.pageX); + xScale = (touches[1].pageX - c_now.pageX) / initHalfWidth; + + var initHalfHeight = (initialTouches[1].pageY - c_init.pageY); + yScale = (touches[1].pageY - c_now.pageY) / initHalfHeight; + } + + // Clip scaling to [1/8, 8] to prevent too much blowup. + xScale = Math.min(8, Math.max(0.125, xScale)); + yScale = Math.min(8, Math.max(0.125, yScale)); + + var didZoom = false; + if (context.touchDirections.x) { + g.dateWindow_ = [ + c_init.dataX - swipe.dataX + (context.initialRange.x[0] - c_init.dataX) / xScale, + c_init.dataX - swipe.dataX + (context.initialRange.x[1] - c_init.dataX) / xScale + ]; + didZoom = true; + } + + if (context.touchDirections.y) { + for (i = 0; i < 1 /*g.axes_.length*/; i++) { + var axis = g.axes_[i]; + var logscale = g.attributes_.getForAxis("logscale", i); + if (logscale) { + // TODO(danvk): implement + } else { + axis.valueWindow = [ + c_init.dataY - swipe.dataY + (context.initialRange.y[0] - c_init.dataY) / yScale, + c_init.dataY - swipe.dataY + (context.initialRange.y[1] - c_init.dataY) / yScale + ]; + didZoom = true; + } + } + } + + g.drawGraph_(false); + + // We only call zoomCallback on zooms, not pans, to mirror desktop behavior. + if (didZoom && touches.length > 1 && g.getFunctionOption('zoomCallback')) { + var viewWindow = g.xAxisRange(); + g.getFunctionOption("zoomCallback").call(g, viewWindow[0], viewWindow[1], g.yAxisRanges()); + } +}; + +/** + * @private + */ +Dygraph.Interaction.endTouch = function(event, g, context) { + if (event.touches.length !== 0) { + // this is effectively a "reset" + Dygraph.Interaction.startTouch(event, g, context); + } else if (event.changedTouches.length == 1) { + // Could be part of a "double tap" + // The heuristic here is that it's a double-tap if the two touchend events + // occur within 500ms and within a 50x50 pixel box. + var now = new Date().getTime(); + var t = event.changedTouches[0]; + if (context.startTimeForDoubleTapMs && + now - context.startTimeForDoubleTapMs < 500 && + context.doubleTapX && Math.abs(context.doubleTapX - t.screenX) < 50 && + context.doubleTapY && Math.abs(context.doubleTapY - t.screenY) < 50) { + g.resetZoom(); + } else { + context.startTimeForDoubleTapMs = now; + context.doubleTapX = t.screenX; + context.doubleTapY = t.screenY; + } + } +}; + +// Determine the distance from x to [left, right]. +var distanceFromInterval = function(x, left, right) { + if (x < left) { + return left - x; + } else if (x > right) { + return x - right; + } else { + return 0; + } +}; + +/** + * Returns the number of pixels by which the event happens from the nearest + * edge of the chart. For events in the interior of the chart, this returns zero. + */ +var distanceFromChart = function(event, g) { + var chartPos = Dygraph.findPos(g.canvas_); + var box = { + left: chartPos.x, + right: chartPos.x + g.canvas_.offsetWidth, + top: chartPos.y, + bottom: chartPos.y + g.canvas_.offsetHeight + }; + + var pt = { + x: Dygraph.pageX(event), + y: Dygraph.pageY(event) + }; + + var dx = distanceFromInterval(pt.x, box.left, box.right), + dy = distanceFromInterval(pt.y, box.top, box.bottom); + return Math.max(dx, dy); +}; + +/** + * Default interation model for dygraphs. You can refer to specific elements of + * this when constructing your own interaction model, e.g.: + * g.updateOptions( { + * interactionModel: { + * mousedown: Dygraph.defaultInteractionModel.mousedown + * } + * } ); + */ +Dygraph.Interaction.defaultModel = { + // Track the beginning of drag events + mousedown: function(event, g, context) { + // Right-click should not initiate a zoom. + if (event.button && event.button == 2) return; + + context.initializeMouseDown(event, g, context); + + if (event.altKey || event.shiftKey) { + Dygraph.startPan(event, g, context); + } else { + Dygraph.startZoom(event, g, context); + } + + // Note: we register mousemove/mouseup on document to allow some leeway for + // events to move outside of the chart. Interaction model events get + // registered on the canvas, which is too small to allow this. + var mousemove = function(event) { + if (context.isZooming) { + // When the mouse moves >200px from the chart edge, cancel the zoom. + var d = distanceFromChart(event, g); + if (d < DRAG_EDGE_MARGIN) { + Dygraph.moveZoom(event, g, context); + } else { + if (context.dragEndX !== null) { + context.dragEndX = null; + context.dragEndY = null; + g.clearZoomRect_(); + } + } + } else if (context.isPanning) { + Dygraph.movePan(event, g, context); + } + }; + var mouseup = function(event) { + if (context.isZooming) { + if (context.dragEndX !== null) { + Dygraph.endZoom(event, g, context); + } else { + Dygraph.Interaction.maybeTreatMouseOpAsClick(event, g, context); + } + } else if (context.isPanning) { + Dygraph.endPan(event, g, context); + } + + Dygraph.removeEvent(document, 'mousemove', mousemove); + Dygraph.removeEvent(document, 'mouseup', mouseup); + context.destroy(); + }; + + g.addAndTrackEvent(document, 'mousemove', mousemove); + g.addAndTrackEvent(document, 'mouseup', mouseup); + }, + willDestroyContextMyself: true, + + touchstart: function(event, g, context) { + Dygraph.Interaction.startTouch(event, g, context); + }, + touchmove: function(event, g, context) { + Dygraph.Interaction.moveTouch(event, g, context); + }, + touchend: function(event, g, context) { + Dygraph.Interaction.endTouch(event, g, context); + }, + + // Disable zooming out if panning. + dblclick: function(event, g, context) { + if (context.cancelNextDblclick) { + context.cancelNextDblclick = false; + return; + } + + // Give plugins a chance to grab this event. + var e = { + canvasx: context.dragEndX, + canvasy: context.dragEndY + }; + if (g.cascadeEvents_('dblclick', e)) { + return; + } + + if (event.altKey || event.shiftKey) { + return; + } + g.resetZoom(); + } +}; + +Dygraph.DEFAULT_ATTRS.interactionModel = Dygraph.Interaction.defaultModel; + +// old ways of accessing these methods/properties +Dygraph.defaultInteractionModel = Dygraph.Interaction.defaultModel; +Dygraph.endZoom = Dygraph.Interaction.endZoom; +Dygraph.moveZoom = Dygraph.Interaction.moveZoom; +Dygraph.startZoom = Dygraph.Interaction.startZoom; +Dygraph.endPan = Dygraph.Interaction.endPan; +Dygraph.movePan = Dygraph.Interaction.movePan; +Dygraph.startPan = Dygraph.Interaction.startPan; + +Dygraph.Interaction.nonInteractiveModel_ = { + mousedown: function(event, g, context) { + context.initializeMouseDown(event, g, context); + }, + mouseup: Dygraph.Interaction.maybeTreatMouseOpAsClick +}; + +// Default interaction model when using the range selector. +Dygraph.Interaction.dragIsPanInteractionModel = { + mousedown: function(event, g, context) { + context.initializeMouseDown(event, g, context); + Dygraph.startPan(event, g, context); + }, + mousemove: function(event, g, context) { + if (context.isPanning) { + Dygraph.movePan(event, g, context); + } + }, + mouseup: function(event, g, context) { + if (context.isPanning) { + Dygraph.endPan(event, g, context); + } + } +}; + +})(); +/** + * @license + * Copyright 2011 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview Description of this file. + * @author danvk@google.com (Dan Vanderkam) + * + * A ticker is a function with the following interface: + * + * function(a, b, pixels, options_view, dygraph, forced_values); + * -> [ { v: tick1_v, label: tick1_label[, label_v: label_v1] }, + * { v: tick2_v, label: tick2_label[, label_v: label_v2] }, + * ... + * ] + * + * The returned value is called a "tick list". + * + * Arguments + * --------- + * + * [a, b] is the range of the axis for which ticks are being generated. For a + * numeric axis, these will simply be numbers. For a date axis, these will be + * millis since epoch (convertable to Date objects using "new Date(a)" and "new + * Date(b)"). + * + * opts provides access to chart- and axis-specific options. It can be used to + * access number/date formatting code/options, check for a log scale, etc. + * + * pixels is the length of the axis in pixels. opts('pixelsPerLabel') is the + * minimum amount of space to be allotted to each label. For instance, if + * pixels=400 and opts('pixelsPerLabel')=40 then the ticker should return + * between zero and ten (400/40) ticks. + * + * dygraph is the Dygraph object for which an axis is being constructed. + * + * forced_values is used for secondary y-axes. The tick positions are typically + * set by the primary y-axis, so the secondary y-axis has no choice in where to + * put these. It simply has to generate labels for these data values. + * + * Tick lists + * ---------- + * Typically a tick will have both a grid/tick line and a label at one end of + * that line (at the bottom for an x-axis, at left or right for the y-axis). + * + * A tick may be missing one of these two components: + * - If "label_v" is specified instead of "v", then there will be no tick or + * gridline, just a label. + * - Similarly, if "label" is not specified, then there will be a gridline + * without a label. + * + * This flexibility is useful in a few situations: + * - For log scales, some of the tick lines may be too close to all have labels. + * - For date scales where years are being displayed, it is desirable to display + * tick marks at the beginnings of years but labels (e.g. "2006") in the + * middle of the years. + */ + +/*jshint sub:true */ +/*global Dygraph:false */ +(function() { +"use strict"; + +/** @typedef {Array.<{v:number, label:string, label_v:(string|undefined)}>} */ +Dygraph.TickList = undefined; // the ' = undefined' keeps jshint happy. + +/** @typedef {function( + * number, + * number, + * number, + * function(string):*, + * Dygraph=, + * Array.<number>= + * ): Dygraph.TickList} + */ +Dygraph.Ticker = undefined; // the ' = undefined' keeps jshint happy. + +/** @type {Dygraph.Ticker} */ +Dygraph.numericLinearTicks = function(a, b, pixels, opts, dygraph, vals) { + var nonLogscaleOpts = function(opt) { + if (opt === 'logscale') return false; + return opts(opt); + }; + return Dygraph.numericTicks(a, b, pixels, nonLogscaleOpts, dygraph, vals); +}; + +/** @type {Dygraph.Ticker} */ +Dygraph.numericTicks = function(a, b, pixels, opts, dygraph, vals) { + var pixels_per_tick = /** @type{number} */(opts('pixelsPerLabel')); + var ticks = []; + var i, j, tickV, nTicks; + if (vals) { + for (i = 0; i < vals.length; i++) { + ticks.push({v: vals[i]}); + } + } else { + // TODO(danvk): factor this log-scale block out into a separate function. + if (opts("logscale")) { + nTicks = Math.floor(pixels / pixels_per_tick); + var minIdx = Dygraph.binarySearch(a, Dygraph.PREFERRED_LOG_TICK_VALUES, 1); + var maxIdx = Dygraph.binarySearch(b, Dygraph.PREFERRED_LOG_TICK_VALUES, -1); + if (minIdx == -1) { + minIdx = 0; + } + if (maxIdx == -1) { + maxIdx = Dygraph.PREFERRED_LOG_TICK_VALUES.length - 1; + } + // Count the number of tick values would appear, if we can get at least + // nTicks / 4 accept them. + var lastDisplayed = null; + if (maxIdx - minIdx >= nTicks / 4) { + for (var idx = maxIdx; idx >= minIdx; idx--) { + var tickValue = Dygraph.PREFERRED_LOG_TICK_VALUES[idx]; + var pixel_coord = Math.log(tickValue / a) / Math.log(b / a) * pixels; + var tick = { v: tickValue }; + if (lastDisplayed === null) { + lastDisplayed = { + tickValue : tickValue, + pixel_coord : pixel_coord + }; + } else { + if (Math.abs(pixel_coord - lastDisplayed.pixel_coord) >= pixels_per_tick) { + lastDisplayed = { + tickValue : tickValue, + pixel_coord : pixel_coord + }; + } else { + tick.label = ""; + } + } + ticks.push(tick); + } + // Since we went in backwards order. + ticks.reverse(); + } + } + + // ticks.length won't be 0 if the log scale function finds values to insert. + if (ticks.length === 0) { + // Basic idea: + // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. + // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). + // The first spacing greater than pixelsPerYLabel is what we use. + // TODO(danvk): version that works on a log scale. + var kmg2 = opts("labelsKMG2"); + var mults, base; + if (kmg2) { + mults = [1, 2, 4, 8, 16, 32, 64, 128, 256]; + base = 16; + } else { + mults = [1, 2, 5, 10, 20, 50, 100]; + base = 10; + } + + // Get the maximum number of permitted ticks based on the + // graph's pixel size and pixels_per_tick setting. + var max_ticks = Math.ceil(pixels / pixels_per_tick); + + // Now calculate the data unit equivalent of this tick spacing. + // Use abs() since graphs may have a reversed Y axis. + var units_per_tick = Math.abs(b - a) / max_ticks; + + // Based on this, get a starting scale which is the largest + // integer power of the chosen base (10 or 16) that still remains + // below the requested pixels_per_tick spacing. + var base_power = Math.floor(Math.log(units_per_tick) / Math.log(base)); + var base_scale = Math.pow(base, base_power); + + // Now try multiples of the starting scale until we find one + // that results in tick marks spaced sufficiently far apart. + // The "mults" array should cover the range 1 .. base^2 to + // adjust for rounding and edge effects. + var scale, low_val, high_val, spacing; + for (j = 0; j < mults.length; j++) { + scale = base_scale * mults[j]; + low_val = Math.floor(a / scale) * scale; + high_val = Math.ceil(b / scale) * scale; + nTicks = Math.abs(high_val - low_val) / scale; + spacing = pixels / nTicks; + if (spacing > pixels_per_tick) break; + } + + // Construct the set of ticks. + // Allow reverse y-axis if it's explicitly requested. + if (low_val > high_val) scale *= -1; + for (i = 0; i <= nTicks; i++) { + tickV = low_val + i * scale; + ticks.push( {v: tickV} ); + } + } + } + + var formatter = /**@type{AxisLabelFormatter}*/(opts('axisLabelFormatter')); + + // Add labels to the ticks. + for (i = 0; i < ticks.length; i++) { + if (ticks[i].label !== undefined) continue; // Use current label. + // TODO(danvk): set granularity to something appropriate here. + ticks[i].label = formatter(ticks[i].v, 0, opts, dygraph); + } + + return ticks; +}; + + +/** @type {Dygraph.Ticker} */ +Dygraph.dateTicker = function(a, b, pixels, opts, dygraph, vals) { + var chosen = Dygraph.pickDateTickGranularity(a, b, pixels, opts); + + if (chosen >= 0) { + return Dygraph.getDateAxis(a, b, chosen, opts, dygraph); + } else { + // this can happen if self.width_ is zero. + return []; + } +}; + +// Time granularity enumeration +// TODO(danvk): make this an @enum +Dygraph.SECONDLY = 0; +Dygraph.TWO_SECONDLY = 1; +Dygraph.FIVE_SECONDLY = 2; +Dygraph.TEN_SECONDLY = 3; +Dygraph.THIRTY_SECONDLY = 4; +Dygraph.MINUTELY = 5; +Dygraph.TWO_MINUTELY = 6; +Dygraph.FIVE_MINUTELY = 7; +Dygraph.TEN_MINUTELY = 8; +Dygraph.THIRTY_MINUTELY = 9; +Dygraph.HOURLY = 10; +Dygraph.TWO_HOURLY = 11; +Dygraph.SIX_HOURLY = 12; +Dygraph.DAILY = 13; +Dygraph.TWO_DAILY = 14; +Dygraph.WEEKLY = 15; +Dygraph.MONTHLY = 16; +Dygraph.QUARTERLY = 17; +Dygraph.BIANNUAL = 18; +Dygraph.ANNUAL = 19; +Dygraph.DECADAL = 20; +Dygraph.CENTENNIAL = 21; +Dygraph.NUM_GRANULARITIES = 22; + +// Date components enumeration (in the order of the arguments in Date) +// TODO: make this an @enum +Dygraph.DATEFIELD_Y = 0; +Dygraph.DATEFIELD_M = 1; +Dygraph.DATEFIELD_D = 2; +Dygraph.DATEFIELD_HH = 3; +Dygraph.DATEFIELD_MM = 4; +Dygraph.DATEFIELD_SS = 5; +Dygraph.DATEFIELD_MS = 6; +Dygraph.NUM_DATEFIELDS = 7; + + +/** + * The value of datefield will start at an even multiple of "step", i.e. + * if datefield=SS and step=5 then the first tick will be on a multiple of 5s. + * + * For granularities <= HOURLY, ticks are generated every `spacing` ms. + * + * At coarser granularities, ticks are generated by incrementing `datefield` by + * `step`. In this case, the `spacing` value is only used to estimate the + * number of ticks. It should roughly correspond to the spacing between + * adjacent ticks. + * + * @type {Array.<{datefield:number, step:number, spacing:number}>} + */ +Dygraph.TICK_PLACEMENT = []; +Dygraph.TICK_PLACEMENT[Dygraph.SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 1, spacing: 1000 * 1}; +Dygraph.TICK_PLACEMENT[Dygraph.TWO_SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 2, spacing: 1000 * 2}; +Dygraph.TICK_PLACEMENT[Dygraph.FIVE_SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 5, spacing: 1000 * 5}; +Dygraph.TICK_PLACEMENT[Dygraph.TEN_SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 10, spacing: 1000 * 10}; +Dygraph.TICK_PLACEMENT[Dygraph.THIRTY_SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 30, spacing: 1000 * 30}; +Dygraph.TICK_PLACEMENT[Dygraph.MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 1, spacing: 1000 * 60}; +Dygraph.TICK_PLACEMENT[Dygraph.TWO_MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 2, spacing: 1000 * 60 * 2}; +Dygraph.TICK_PLACEMENT[Dygraph.FIVE_MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 5, spacing: 1000 * 60 * 5}; +Dygraph.TICK_PLACEMENT[Dygraph.TEN_MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 10, spacing: 1000 * 60 * 10}; +Dygraph.TICK_PLACEMENT[Dygraph.THIRTY_MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 30, spacing: 1000 * 60 * 30}; +Dygraph.TICK_PLACEMENT[Dygraph.HOURLY] = {datefield: Dygraph.DATEFIELD_HH, step: 1, spacing: 1000 * 3600}; +Dygraph.TICK_PLACEMENT[Dygraph.TWO_HOURLY] = {datefield: Dygraph.DATEFIELD_HH, step: 2, spacing: 1000 * 3600 * 2}; +Dygraph.TICK_PLACEMENT[Dygraph.SIX_HOURLY] = {datefield: Dygraph.DATEFIELD_HH, step: 6, spacing: 1000 * 3600 * 6}; +Dygraph.TICK_PLACEMENT[Dygraph.DAILY] = {datefield: Dygraph.DATEFIELD_D, step: 1, spacing: 1000 * 86400}; +Dygraph.TICK_PLACEMENT[Dygraph.TWO_DAILY] = {datefield: Dygraph.DATEFIELD_D, step: 2, spacing: 1000 * 86400 * 2}; +Dygraph.TICK_PLACEMENT[Dygraph.WEEKLY] = {datefield: Dygraph.DATEFIELD_D, step: 7, spacing: 1000 * 604800}; +Dygraph.TICK_PLACEMENT[Dygraph.MONTHLY] = {datefield: Dygraph.DATEFIELD_M, step: 1, spacing: 1000 * 7200 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 / 12 +Dygraph.TICK_PLACEMENT[Dygraph.QUARTERLY] = {datefield: Dygraph.DATEFIELD_M, step: 3, spacing: 1000 * 21600 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 / 4 +Dygraph.TICK_PLACEMENT[Dygraph.BIANNUAL] = {datefield: Dygraph.DATEFIELD_M, step: 6, spacing: 1000 * 43200 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 / 2 +Dygraph.TICK_PLACEMENT[Dygraph.ANNUAL] = {datefield: Dygraph.DATEFIELD_Y, step: 1, spacing: 1000 * 86400 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 * 1 +Dygraph.TICK_PLACEMENT[Dygraph.DECADAL] = {datefield: Dygraph.DATEFIELD_Y, step: 10, spacing: 1000 * 864000 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 * 10 +Dygraph.TICK_PLACEMENT[Dygraph.CENTENNIAL] = {datefield: Dygraph.DATEFIELD_Y, step: 100, spacing: 1000 * 8640000 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 * 100 + + +/** + * This is a list of human-friendly values at which to show tick marks on a log + * scale. It is k * 10^n, where k=1..9 and n=-39..+39, so: + * ..., 1, 2, 3, 4, 5, ..., 9, 10, 20, 30, ..., 90, 100, 200, 300, ... + * NOTE: this assumes that Dygraph.LOG_SCALE = 10. + * @type {Array.<number>} + */ +Dygraph.PREFERRED_LOG_TICK_VALUES = (function() { + var vals = []; + for (var power = -39; power <= 39; power++) { + var range = Math.pow(10, power); + for (var mult = 1; mult <= 9; mult++) { + var val = range * mult; + vals.push(val); + } + } + return vals; +})(); + +/** + * Determine the correct granularity of ticks on a date axis. + * + * @param {number} a Left edge of the chart (ms) + * @param {number} b Right edge of the chart (ms) + * @param {number} pixels Size of the chart in the relevant dimension (width). + * @param {function(string):*} opts Function mapping from option name -> value. + * @return {number} The appropriate axis granularity for this chart. See the + * enumeration of possible values in dygraph-tickers.js. + */ +Dygraph.pickDateTickGranularity = function(a, b, pixels, opts) { + var pixels_per_tick = /** @type{number} */(opts('pixelsPerLabel')); + for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { + var num_ticks = Dygraph.numDateTicks(a, b, i); + if (pixels / num_ticks >= pixels_per_tick) { + return i; + } + } + return -1; +}; + +/** + * Compute the number of ticks on a date axis for a given granularity. + * @param {number} start_time + * @param {number} end_time + * @param {number} granularity (one of the granularities enumerated above) + * @return {number} (Approximate) number of ticks that would result. + */ +Dygraph.numDateTicks = function(start_time, end_time, granularity) { + var spacing = Dygraph.TICK_PLACEMENT[granularity].spacing; + return Math.round(1.0 * (end_time - start_time) / spacing); +}; + +/** + * Compute the positions and labels of ticks on a date axis for a given granularity. + * @param {number} start_time + * @param {number} end_time + * @param {number} granularity (one of the granularities enumerated above) + * @param {function(string):*} opts Function mapping from option name -> value. + * @param {Dygraph=} dg + * @return {!Dygraph.TickList} + */ +Dygraph.getDateAxis = function(start_time, end_time, granularity, opts, dg) { + var formatter = /** @type{AxisLabelFormatter} */( + opts("axisLabelFormatter")); + var utc = opts("labelsUTC"); + var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal; + + var datefield = Dygraph.TICK_PLACEMENT[granularity].datefield; + var step = Dygraph.TICK_PLACEMENT[granularity].step; + var spacing = Dygraph.TICK_PLACEMENT[granularity].spacing; + + // Choose a nice tick position before the initial instant. + // Currently, this code deals properly with the existent daily granularities: + // DAILY (with step of 1) and WEEKLY (with step of 7 but specially handled). + // Other daily granularities (say TWO_DAILY) should also be handled specially + // by setting the start_date_offset to 0. + var start_date = new Date(start_time); + var date_array = []; + date_array[Dygraph.DATEFIELD_Y] = accessors.getFullYear(start_date); + date_array[Dygraph.DATEFIELD_M] = accessors.getMonth(start_date); + date_array[Dygraph.DATEFIELD_D] = accessors.getDate(start_date); + date_array[Dygraph.DATEFIELD_HH] = accessors.getHours(start_date); + date_array[Dygraph.DATEFIELD_MM] = accessors.getMinutes(start_date); + date_array[Dygraph.DATEFIELD_SS] = accessors.getSeconds(start_date); + date_array[Dygraph.DATEFIELD_MS] = accessors.getMilliseconds(start_date); + + var start_date_offset = date_array[datefield] % step; + if (granularity == Dygraph.WEEKLY) { + // This will put the ticks on Sundays. + start_date_offset = accessors.getDay(start_date); + } + + date_array[datefield] -= start_date_offset; + for (var df = datefield + 1; df < Dygraph.NUM_DATEFIELDS; df++) { + // The minimum value is 1 for the day of month, and 0 for all other fields. + date_array[df] = (df === Dygraph.DATEFIELD_D) ? 1 : 0; + } + + // Generate the ticks. + // For granularities not coarser than HOURLY we use the fact that: + // the number of milliseconds between ticks is constant + // and equal to the defined spacing. + // Otherwise we rely on the 'roll over' property of the Date functions: + // when some date field is set to a value outside of its logical range, + // the excess 'rolls over' the next (more significant) field. + // However, when using local time with DST transitions, + // there are dates that do not represent any time value at all + // (those in the hour skipped at the 'spring forward'), + // and the JavaScript engines usually return an equivalent value. + // Hence we have to check that the date is properly increased at each step, + // returning a date at a nice tick position. + var ticks = []; + var tick_date = accessors.makeDate.apply(null, date_array); + var tick_time = tick_date.getTime(); + if (granularity <= Dygraph.HOURLY) { + if (tick_time < start_time) { + tick_time += spacing; + tick_date = new Date(tick_time); + } + while (tick_time <= end_time) { + ticks.push({ v: tick_time, + label: formatter(tick_date, granularity, opts, dg) + }); + tick_time += spacing; + tick_date = new Date(tick_time); + } + } else { + if (tick_time < start_time) { + date_array[datefield] += step; + tick_date = accessors.makeDate.apply(null, date_array); + tick_time = tick_date.getTime(); + } + while (tick_time <= end_time) { + if (granularity >= Dygraph.DAILY || + accessors.getHours(tick_date) % step === 0) { + ticks.push({ v: tick_time, + label: formatter(tick_date, granularity, opts, dg) + }); + } + date_array[datefield] += step; + tick_date = accessors.makeDate.apply(null, date_array); + tick_time = tick_date.getTime(); + } + } + return ticks; +}; + +// These are set here so that this file can be included after dygraph.js +// or independently. +if (Dygraph && + Dygraph.DEFAULT_ATTRS && + Dygraph.DEFAULT_ATTRS['axes'] && + Dygraph.DEFAULT_ATTRS['axes']['x'] && + Dygraph.DEFAULT_ATTRS['axes']['y'] && + Dygraph.DEFAULT_ATTRS['axes']['y2']) { + Dygraph.DEFAULT_ATTRS['axes']['x']['ticker'] = Dygraph.dateTicker; + Dygraph.DEFAULT_ATTRS['axes']['y']['ticker'] = Dygraph.numericTicks; + Dygraph.DEFAULT_ATTRS['axes']['y2']['ticker'] = Dygraph.numericTicks; +} + +})(); +/*global Dygraph:false */ + +// Namespace for plugins. Load this before plugins/*.js files. +Dygraph.Plugins = {}; +/** + * @license + * Copyright 2012 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/*global Dygraph:false */ + +Dygraph.Plugins.Annotations = (function() { + +"use strict"; + +/** +Current bits of jankiness: +- Uses dygraph.layout_ to get the parsed annotations. +- Uses dygraph.plotter_.area + +It would be nice if the plugin didn't require so much special support inside +the core dygraphs classes, but annotations involve quite a bit of parsing and +layout. + +TODO(danvk): cache DOM elements. + +*/ + +var annotations = function() { + this.annotations_ = []; +}; + +annotations.prototype.toString = function() { + return "Annotations Plugin"; +}; + +annotations.prototype.activate = function(g) { + return { + clearChart: this.clearChart, + didDrawChart: this.didDrawChart + }; +}; + +annotations.prototype.detachLabels = function() { + for (var i = 0; i < this.annotations_.length; i++) { + var a = this.annotations_[i]; + if (a.parentNode) a.parentNode.removeChild(a); + this.annotations_[i] = null; + } + this.annotations_ = []; +}; + +annotations.prototype.clearChart = function(e) { + this.detachLabels(); +}; + +annotations.prototype.didDrawChart = function(e) { + var g = e.dygraph; + + // Early out in the (common) case of zero annotations. + var points = g.layout_.annotated_points; + if (!points || points.length === 0) return; + + var containerDiv = e.canvas.parentNode; + var annotationStyle = { + "position": "absolute", + "fontSize": g.getOption('axisLabelFontSize') + "px", + "zIndex": 10, + "overflow": "hidden" + }; + + var bindEvt = function(eventName, classEventName, pt) { + return function(annotation_event) { + var a = pt.annotation; + if (a.hasOwnProperty(eventName)) { + a[eventName](a, pt, g, annotation_event); + } else if (g.getOption(classEventName)) { + g.getOption(classEventName)(a, pt, g, annotation_event ); + } + }; + }; + + // Add the annotations one-by-one. + var area = e.dygraph.plotter_.area; + + // x-coord to sum of previous annotation's heights (used for stacking). + var xToUsedHeight = {}; + + for (var i = 0; i < points.length; i++) { + var p = points[i]; + if (p.canvasx < area.x || p.canvasx > area.x + area.w || + p.canvasy < area.y || p.canvasy > area.y + area.h) { + continue; + } + + var a = p.annotation; + var tick_height = 6; + if (a.hasOwnProperty("tickHeight")) { + tick_height = a.tickHeight; + } + + var div = document.createElement("div"); + for (var name in annotationStyle) { + if (annotationStyle.hasOwnProperty(name)) { + div.style[name] = annotationStyle[name]; + } + } + if (!a.hasOwnProperty('icon')) { + div.className = "dygraphDefaultAnnotation"; + } + if (a.hasOwnProperty('cssClass')) { + div.className += " " + a.cssClass; + } + + var width = a.hasOwnProperty('width') ? a.width : 16; + var height = a.hasOwnProperty('height') ? a.height : 16; + if (a.hasOwnProperty('icon')) { + var img = document.createElement("img"); + img.src = a.icon; + img.width = width; + img.height = height; + div.appendChild(img); + } else if (p.annotation.hasOwnProperty('shortText')) { + div.appendChild(document.createTextNode(p.annotation.shortText)); + } + var left = p.canvasx - width / 2; + div.style.left = left + "px"; + var divTop = 0; + if (a.attachAtBottom) { + var y = (area.y + area.h - height - tick_height); + if (xToUsedHeight[left]) { + y -= xToUsedHeight[left]; + } else { + xToUsedHeight[left] = 0; + } + xToUsedHeight[left] += (tick_height + height); + divTop = y; + } else { + divTop = p.canvasy - height - tick_height; + } + div.style.top = divTop + "px"; + div.style.width = width + "px"; + div.style.height = height + "px"; + div.title = p.annotation.text; + div.style.color = g.colorsMap_[p.name]; + div.style.borderColor = g.colorsMap_[p.name]; + a.div = div; + + g.addAndTrackEvent(div, 'click', + bindEvt('clickHandler', 'annotationClickHandler', p, this)); + g.addAndTrackEvent(div, 'mouseover', + bindEvt('mouseOverHandler', 'annotationMouseOverHandler', p, this)); + g.addAndTrackEvent(div, 'mouseout', + bindEvt('mouseOutHandler', 'annotationMouseOutHandler', p, this)); + g.addAndTrackEvent(div, 'dblclick', + bindEvt('dblClickHandler', 'annotationDblClickHandler', p, this)); + + containerDiv.appendChild(div); + this.annotations_.push(div); + + var ctx = e.drawingContext; + ctx.save(); + ctx.strokeStyle = g.colorsMap_[p.name]; + ctx.beginPath(); + if (!a.attachAtBottom) { + ctx.moveTo(p.canvasx, p.canvasy); + ctx.lineTo(p.canvasx, p.canvasy - 2 - tick_height); + } else { + var y = divTop + height; + ctx.moveTo(p.canvasx, y); + ctx.lineTo(p.canvasx, y + tick_height); + } + ctx.closePath(); + ctx.stroke(); + ctx.restore(); + } +}; + +annotations.prototype.destroy = function() { + this.detachLabels(); +}; + +return annotations; + +})(); +/** + * @license + * Copyright 2012 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/*global Dygraph:false */ + +Dygraph.Plugins.Axes = (function() { + +'use strict'; + +/* +Bits of jankiness: +- Direct layout access +- Direct area access +- Should include calculation of ticks, not just the drawing. + +Options left to make axis-friendly. + ('drawAxesAtZero') + ('xAxisHeight') +*/ + +/** + * Draws the axes. This includes the labels on the x- and y-axes, as well + * as the tick marks on the axes. + * It does _not_ draw the grid lines which span the entire chart. + */ +var axes = function() { + this.xlabels_ = []; + this.ylabels_ = []; +}; + +axes.prototype.toString = function() { + return 'Axes Plugin'; +}; + +axes.prototype.activate = function(g) { + return { + layout: this.layout, + clearChart: this.clearChart, + willDrawChart: this.willDrawChart + }; +}; + +axes.prototype.layout = function(e) { + var g = e.dygraph; + + if (g.getOptionForAxis('drawAxis', 'y')) { + var w = g.getOptionForAxis('axisLabelWidth', 'y') + 2 * g.getOptionForAxis('axisTickSize', 'y'); + e.reserveSpaceLeft(w); + } + + if (g.getOptionForAxis('drawAxis', 'x')) { + var h; + // NOTE: I think this is probably broken now, since g.getOption() now + // hits the dictionary. (That is, g.getOption('xAxisHeight') now always + // has a value.) + if (g.getOption('xAxisHeight')) { + h = g.getOption('xAxisHeight'); + } else { + h = g.getOptionForAxis('axisLabelFontSize', 'x') + 2 * g.getOptionForAxis('axisTickSize', 'x'); + } + e.reserveSpaceBottom(h); + } + + if (g.numAxes() == 2) { + if (g.getOptionForAxis('drawAxis', 'y2')) { + var w = g.getOptionForAxis('axisLabelWidth', 'y2') + 2 * g.getOptionForAxis('axisTickSize', 'y2'); + e.reserveSpaceRight(w); + } + } else if (g.numAxes() > 2) { + g.error('Only two y-axes are supported at this time. (Trying ' + + 'to use ' + g.numAxes() + ')'); + } +}; + +axes.prototype.detachLabels = function() { + function removeArray(ary) { + for (var i = 0; i < ary.length; i++) { + var el = ary[i]; + if (el.parentNode) el.parentNode.removeChild(el); + } + } + + removeArray(this.xlabels_); + removeArray(this.ylabels_); + this.xlabels_ = []; + this.ylabels_ = []; +}; + +axes.prototype.clearChart = function(e) { + this.detachLabels(); +}; + +axes.prototype.willDrawChart = function(e) { + var g = e.dygraph; + + if (!g.getOptionForAxis('drawAxis', 'x') && + !g.getOptionForAxis('drawAxis', 'y') && + !g.getOptionForAxis('drawAxis', 'y2')) { + return; + } + + // Round pixels to half-integer boundaries for crisper drawing. + function halfUp(x) { return Math.round(x) + 0.5; } + function halfDown(y){ return Math.round(y) - 0.5; } + + var context = e.drawingContext; + var containerDiv = e.canvas.parentNode; + var canvasWidth = g.width_; // e.canvas.width is affected by pixel ratio. + var canvasHeight = g.height_; + + var label, x, y, tick, i; + + var makeLabelStyle = function(axis) { + return { + position: 'absolute', + fontSize: g.getOptionForAxis('axisLabelFontSize', axis) + 'px', + zIndex: 10, + color: g.getOptionForAxis('axisLabelColor', axis), + width: g.getOptionForAxis('axisLabelWidth', axis) + 'px', + // height: g.getOptionForAxis('axisLabelFontSize', 'x') + 2 + "px", + lineHeight: 'normal', // Something other than "normal" line-height screws up label positioning. + overflow: 'hidden' + }; + }; + + var labelStyles = { + x : makeLabelStyle('x'), + y : makeLabelStyle('y'), + y2 : makeLabelStyle('y2') + }; + + var makeDiv = function(txt, axis, prec_axis) { + /* + * This seems to be called with the following three sets of axis/prec_axis: + * x: undefined + * y: y1 + * y: y2 + */ + var div = document.createElement('div'); + var labelStyle = labelStyles[prec_axis == 'y2' ? 'y2' : axis]; + for (var name in labelStyle) { + if (labelStyle.hasOwnProperty(name)) { + div.style[name] = labelStyle[name]; + } + } + var inner_div = document.createElement('div'); + inner_div.className = 'dygraph-axis-label' + + ' dygraph-axis-label-' + axis + + (prec_axis ? ' dygraph-axis-label-' + prec_axis : ''); + inner_div.innerHTML = txt; + div.appendChild(inner_div); + return div; + }; + + // axis lines + context.save(); + + var layout = g.layout_; + var area = e.dygraph.plotter_.area; + + // Helper for repeated axis-option accesses. + var makeOptionGetter = function(axis) { + return function(option) { + return g.getOptionForAxis(option, axis); + }; + }; + + if (g.getOptionForAxis('drawAxis', 'y')) { + if (layout.yticks && layout.yticks.length > 0) { + var num_axes = g.numAxes(); + var getOptions = [makeOptionGetter('y'), makeOptionGetter('y2')]; + for (i = 0; i < layout.yticks.length; i++) { + tick = layout.yticks[i]; + if (typeof(tick) == 'function') return; // <-- when would this happen? + x = area.x; + var sgn = 1; + var prec_axis = 'y1'; + var getAxisOption = getOptions[0]; + if (tick[0] == 1) { // right-side y-axis + x = area.x + area.w; + sgn = -1; + prec_axis = 'y2'; + getAxisOption = getOptions[1]; + } + var fontSize = getAxisOption('axisLabelFontSize'); + y = area.y + tick[1] * area.h; + + /* Tick marks are currently clipped, so don't bother drawing them. + context.beginPath(); + context.moveTo(halfUp(x), halfDown(y)); + context.lineTo(halfUp(x - sgn * this.attr_('axisTickSize')), halfDown(y)); + context.closePath(); + context.stroke(); + */ + + label = makeDiv(tick[2], 'y', num_axes == 2 ? prec_axis : null); + var top = (y - fontSize / 2); + if (top < 0) top = 0; + + if (top + fontSize + 3 > canvasHeight) { + label.style.bottom = '0'; + } else { + label.style.top = top + 'px'; + } + if (tick[0] === 0) { + label.style.left = (area.x - getAxisOption('axisLabelWidth') - getAxisOption('axisTickSize')) + 'px'; + label.style.textAlign = 'right'; + } else if (tick[0] == 1) { + label.style.left = (area.x + area.w + + getAxisOption('axisTickSize')) + 'px'; + label.style.textAlign = 'left'; + } + label.style.width = getAxisOption('axisLabelWidth') + 'px'; + containerDiv.appendChild(label); + this.ylabels_.push(label); + } + + // The lowest tick on the y-axis often overlaps with the leftmost + // tick on the x-axis. Shift the bottom tick up a little bit to + // compensate if necessary. + var bottomTick = this.ylabels_[0]; + // Interested in the y2 axis also? + var fontSize = g.getOptionForAxis('axisLabelFontSize', 'y'); + var bottom = parseInt(bottomTick.style.top, 10) + fontSize; + if (bottom > canvasHeight - fontSize) { + bottomTick.style.top = (parseInt(bottomTick.style.top, 10) - + fontSize / 2) + 'px'; + } + } + + // draw a vertical line on the left to separate the chart from the labels. + var axisX; + if (g.getOption('drawAxesAtZero')) { + var r = g.toPercentXCoord(0); + if (r > 1 || r < 0 || isNaN(r)) r = 0; + axisX = halfUp(area.x + r * area.w); + } else { + axisX = halfUp(area.x); + } + + context.strokeStyle = g.getOptionForAxis('axisLineColor', 'y'); + context.lineWidth = g.getOptionForAxis('axisLineWidth', 'y'); + + context.beginPath(); + context.moveTo(axisX, halfDown(area.y)); + context.lineTo(axisX, halfDown(area.y + area.h)); + context.closePath(); + context.stroke(); + + // if there's a secondary y-axis, draw a vertical line for that, too. + if (g.numAxes() == 2) { + context.strokeStyle = g.getOptionForAxis('axisLineColor', 'y2'); + context.lineWidth = g.getOptionForAxis('axisLineWidth', 'y2'); + context.beginPath(); + context.moveTo(halfDown(area.x + area.w), halfDown(area.y)); + context.lineTo(halfDown(area.x + area.w), halfDown(area.y + area.h)); + context.closePath(); + context.stroke(); + } + } + + if (g.getOptionForAxis('drawAxis', 'x')) { + if (layout.xticks) { + var getAxisOption = makeOptionGetter('x'); + for (i = 0; i < layout.xticks.length; i++) { + tick = layout.xticks[i]; + x = area.x + tick[0] * area.w; + y = area.y + area.h; + + /* Tick marks are currently clipped, so don't bother drawing them. + context.beginPath(); + context.moveTo(halfUp(x), halfDown(y)); + context.lineTo(halfUp(x), halfDown(y + this.attr_('axisTickSize'))); + context.closePath(); + context.stroke(); + */ + + label = makeDiv(tick[1], 'x'); + label.style.textAlign = 'center'; + label.style.top = (y + getAxisOption('axisTickSize')) + 'px'; + + var left = (x - getAxisOption('axisLabelWidth')/2); + if (left + getAxisOption('axisLabelWidth') > canvasWidth) { + left = canvasWidth - getAxisOption('axisLabelWidth'); + label.style.textAlign = 'right'; + } + if (left < 0) { + left = 0; + label.style.textAlign = 'left'; + } + + label.style.left = left + 'px'; + label.style.width = getAxisOption('axisLabelWidth') + 'px'; + containerDiv.appendChild(label); + this.xlabels_.push(label); + } + } + + context.strokeStyle = g.getOptionForAxis('axisLineColor', 'x'); + context.lineWidth = g.getOptionForAxis('axisLineWidth', 'x'); + context.beginPath(); + var axisY; + if (g.getOption('drawAxesAtZero')) { + var r = g.toPercentYCoord(0, 0); + if (r > 1 || r < 0) r = 1; + axisY = halfDown(area.y + r * area.h); + } else { + axisY = halfDown(area.y + area.h); + } + context.moveTo(halfUp(area.x), axisY); + context.lineTo(halfUp(area.x + area.w), axisY); + context.closePath(); + context.stroke(); + } + + context.restore(); +}; + +return axes; +})(); +/** + * @license + * Copyright 2012 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ +/*global Dygraph:false */ + +Dygraph.Plugins.ChartLabels = (function() { + +"use strict"; + +// TODO(danvk): move chart label options out of dygraphs and into the plugin. +// TODO(danvk): only tear down & rebuild the DIVs when it's necessary. + +var chart_labels = function() { + this.title_div_ = null; + this.xlabel_div_ = null; + this.ylabel_div_ = null; + this.y2label_div_ = null; +}; + +chart_labels.prototype.toString = function() { + return "ChartLabels Plugin"; +}; + +chart_labels.prototype.activate = function(g) { + return { + layout: this.layout, + // clearChart: this.clearChart, + didDrawChart: this.didDrawChart + }; +}; + +// QUESTION: should there be a plugin-utils.js? +var createDivInRect = function(r) { + var div = document.createElement('div'); + div.style.position = 'absolute'; + div.style.left = r.x + 'px'; + div.style.top = r.y + 'px'; + div.style.width = r.w + 'px'; + div.style.height = r.h + 'px'; + return div; +}; + +// Detach and null out any existing nodes. +chart_labels.prototype.detachLabels_ = function() { + var els = [ this.title_div_, + this.xlabel_div_, + this.ylabel_div_, + this.y2label_div_ ]; + for (var i = 0; i < els.length; i++) { + var el = els[i]; + if (!el) continue; + if (el.parentNode) el.parentNode.removeChild(el); + } + + this.title_div_ = null; + this.xlabel_div_ = null; + this.ylabel_div_ = null; + this.y2label_div_ = null; +}; + +var createRotatedDiv = function(g, box, axis, classes, html) { + // TODO(danvk): is this outer div actually necessary? + var div = document.createElement("div"); + div.style.position = 'absolute'; + if (axis == 1) { + // NOTE: this is cheating. Should be positioned relative to the box. + div.style.left = '0px'; + } else { + div.style.left = box.x + 'px'; + } + div.style.top = box.y + 'px'; + div.style.width = box.w + 'px'; + div.style.height = box.h + 'px'; + div.style.fontSize = (g.getOption('yLabelWidth') - 2) + 'px'; + + var inner_div = document.createElement("div"); + inner_div.style.position = 'absolute'; + inner_div.style.width = box.h + 'px'; + inner_div.style.height = box.w + 'px'; + inner_div.style.top = (box.h / 2 - box.w / 2) + 'px'; + inner_div.style.left = (box.w / 2 - box.h / 2) + 'px'; + inner_div.style.textAlign = 'center'; + + // CSS rotation is an HTML5 feature which is not standardized. Hence every + // browser has its own name for the CSS style. + var val = 'rotate(' + (axis == 1 ? '-' : '') + '90deg)'; + inner_div.style.transform = val; // HTML5 + inner_div.style.WebkitTransform = val; // Safari/Chrome + inner_div.style.MozTransform = val; // Firefox + inner_div.style.OTransform = val; // Opera + inner_div.style.msTransform = val; // IE9 + + if (typeof(document.documentMode) !== 'undefined' && + document.documentMode < 9) { + // We're dealing w/ an old version of IE, so we have to rotate the text + // using a BasicImage transform. This uses a different origin of rotation + // than HTML5 rotation (top left of div vs. its center). + inner_div.style.filter = + 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + + (axis == 1 ? '3' : '1') + ')'; + inner_div.style.left = '0px'; + inner_div.style.top = '0px'; + } + + var class_div = document.createElement("div"); + class_div.className = classes; + class_div.innerHTML = html; + + inner_div.appendChild(class_div); + div.appendChild(inner_div); + return div; +}; + +chart_labels.prototype.layout = function(e) { + this.detachLabels_(); + + var g = e.dygraph; + var div = e.chart_div; + if (g.getOption('title')) { + // QUESTION: should this return an absolutely-positioned div instead? + var title_rect = e.reserveSpaceTop(g.getOption('titleHeight')); + this.title_div_ = createDivInRect(title_rect); + this.title_div_.style.textAlign = 'center'; + this.title_div_.style.fontSize = (g.getOption('titleHeight') - 8) + 'px'; + this.title_div_.style.fontWeight = 'bold'; + this.title_div_.style.zIndex = 10; + + var class_div = document.createElement("div"); + class_div.className = 'dygraph-label dygraph-title'; + class_div.innerHTML = g.getOption('title'); + this.title_div_.appendChild(class_div); + div.appendChild(this.title_div_); + } + + if (g.getOption('xlabel')) { + var x_rect = e.reserveSpaceBottom(g.getOption('xLabelHeight')); + this.xlabel_div_ = createDivInRect(x_rect); + this.xlabel_div_.style.textAlign = 'center'; + this.xlabel_div_.style.fontSize = (g.getOption('xLabelHeight') - 2) + 'px'; + + var class_div = document.createElement("div"); + class_div.className = 'dygraph-label dygraph-xlabel'; + class_div.innerHTML = g.getOption('xlabel'); + this.xlabel_div_.appendChild(class_div); + div.appendChild(this.xlabel_div_); + } + + if (g.getOption('ylabel')) { + // It would make sense to shift the chart here to make room for the y-axis + // label, but the default yAxisLabelWidth is large enough that this results + // in overly-padded charts. The y-axis label should fit fine. If it + // doesn't, the yAxisLabelWidth option can be increased. + var y_rect = e.reserveSpaceLeft(0); + + this.ylabel_div_ = createRotatedDiv( + g, y_rect, + 1, // primary (left) y-axis + 'dygraph-label dygraph-ylabel', + g.getOption('ylabel')); + div.appendChild(this.ylabel_div_); + } + + if (g.getOption('y2label') && g.numAxes() == 2) { + // same logic applies here as for ylabel. + var y2_rect = e.reserveSpaceRight(0); + this.y2label_div_ = createRotatedDiv( + g, y2_rect, + 2, // secondary (right) y-axis + 'dygraph-label dygraph-y2label', + g.getOption('y2label')); + div.appendChild(this.y2label_div_); + } +}; + +chart_labels.prototype.didDrawChart = function(e) { + var g = e.dygraph; + if (this.title_div_) { + this.title_div_.children[0].innerHTML = g.getOption('title'); + } + if (this.xlabel_div_) { + this.xlabel_div_.children[0].innerHTML = g.getOption('xlabel'); + } + if (this.ylabel_div_) { + this.ylabel_div_.children[0].children[0].innerHTML = g.getOption('ylabel'); + } + if (this.y2label_div_) { + this.y2label_div_.children[0].children[0].innerHTML = g.getOption('y2label'); + } +}; + +chart_labels.prototype.clearChart = function() { +}; + +chart_labels.prototype.destroy = function() { + this.detachLabels_(); +}; + + +return chart_labels; +})(); +/** + * @license + * Copyright 2012 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ +/*global Dygraph:false */ + +Dygraph.Plugins.Grid = (function() { + +/* + +Current bits of jankiness: +- Direct layout access +- Direct area access + +*/ + +"use strict"; + + +/** + * Draws the gridlines, i.e. the gray horizontal & vertical lines running the + * length of the chart. + * + * @constructor + */ +var grid = function() { +}; + +grid.prototype.toString = function() { + return "Gridline Plugin"; +}; + +grid.prototype.activate = function(g) { + return { + willDrawChart: this.willDrawChart + }; +}; + +grid.prototype.willDrawChart = function(e) { + // Draw the new X/Y grid. Lines appear crisper when pixels are rounded to + // half-integers. This prevents them from drawing in two rows/cols. + var g = e.dygraph; + var ctx = e.drawingContext; + var layout = g.layout_; + var area = e.dygraph.plotter_.area; + + function halfUp(x) { return Math.round(x) + 0.5; } + function halfDown(y){ return Math.round(y) - 0.5; } + + var x, y, i, ticks; + if (g.getOptionForAxis('drawGrid', 'y')) { + var axes = ["y", "y2"]; + var strokeStyles = [], lineWidths = [], drawGrid = [], stroking = [], strokePattern = []; + for (var i = 0; i < axes.length; i++) { + drawGrid[i] = g.getOptionForAxis('drawGrid', axes[i]); + if (drawGrid[i]) { + strokeStyles[i] = g.getOptionForAxis('gridLineColor', axes[i]); + lineWidths[i] = g.getOptionForAxis('gridLineWidth', axes[i]); + strokePattern[i] = g.getOptionForAxis('gridLinePattern', axes[i]); + stroking[i] = strokePattern[i] && (strokePattern[i].length >= 2); + } + } + ticks = layout.yticks; + ctx.save(); + // draw grids for the different y axes + for (i = 0; i < ticks.length; i++) { + var axis = ticks[i][0]; + if(drawGrid[axis]) { + if (stroking[axis]) { + ctx.installPattern(strokePattern[axis]); + } + ctx.strokeStyle = strokeStyles[axis]; + ctx.lineWidth = lineWidths[axis]; + + x = halfUp(area.x); + y = halfDown(area.y + ticks[i][1] * area.h); + ctx.beginPath(); + ctx.moveTo(x, y); + ctx.lineTo(x + area.w, y); + ctx.closePath(); + ctx.stroke(); + + if (stroking[axis]) { + ctx.uninstallPattern(); + } + } + } + ctx.restore(); + } + + // draw grid for x axis + if (g.getOptionForAxis('drawGrid', 'x')) { + ticks = layout.xticks; + ctx.save(); + var strokePattern = g.getOptionForAxis('gridLinePattern', 'x'); + var stroking = strokePattern && (strokePattern.length >= 2); + if (stroking) { + ctx.installPattern(strokePattern); + } + ctx.strokeStyle = g.getOptionForAxis('gridLineColor', 'x'); + ctx.lineWidth = g.getOptionForAxis('gridLineWidth', 'x'); + for (i = 0; i < ticks.length; i++) { + x = halfUp(area.x + ticks[i][0] * area.w); + y = halfDown(area.y + area.h); + ctx.beginPath(); + ctx.moveTo(x, y); + ctx.lineTo(x, area.y); + ctx.closePath(); + ctx.stroke(); + } + if (stroking) { + ctx.uninstallPattern(); + } + ctx.restore(); + } +}; + +grid.prototype.destroy = function() { +}; + +return grid; + +})(); +/** + * @license + * Copyright 2012 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ +/*global Dygraph:false */ + +Dygraph.Plugins.Legend = (function() { +/* +Current bits of jankiness: +- Uses two private APIs: + 1. Dygraph.optionsViewForAxis_ + 2. dygraph.plotter_.area +- Registers for a "predraw" event, which should be renamed. +- I call calculateEmWidthInDiv more often than needed. +*/ + +/*global Dygraph:false */ +"use strict"; + + +/** + * Creates the legend, which appears when the user hovers over the chart. + * The legend can be either a user-specified or generated div. + * + * @constructor + */ +var legend = function() { + this.legend_div_ = null; + this.is_generated_div_ = false; // do we own this div, or was it user-specified? +}; + +legend.prototype.toString = function() { + return "Legend Plugin"; +}; + +// (defined below) +var generateLegendDashHTML; + +/** + * This is called during the dygraph constructor, after options have been set + * but before the data is available. + * + * Proper tasks to do here include: + * - Reading your own options + * - DOM manipulation + * - Registering event listeners + * + * @param {Dygraph} g Graph instance. + * @return {object.<string, function(ev)>} Mapping of event names to callbacks. + */ +legend.prototype.activate = function(g) { + var div; + var divWidth = g.getOption('labelsDivWidth'); + + var userLabelsDiv = g.getOption('labelsDiv'); + if (userLabelsDiv && null !== userLabelsDiv) { + if (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String) { + div = document.getElementById(userLabelsDiv); + } else { + div = userLabelsDiv; + } + } else { + // Default legend styles. These can be overridden in CSS by adding + // "!important" after your rule, e.g. "left: 30px !important;" + var messagestyle = { + "position": "absolute", + "fontSize": "14px", + "zIndex": 10, + "width": divWidth + "px", + "top": "0px", + "left": (g.size().width - divWidth - 2) + "px", + "background": "white", + "lineHeight": "normal", + "textAlign": "left", + "overflow": "hidden"}; + + // TODO(danvk): get rid of labelsDivStyles? CSS is better. + Dygraph.update(messagestyle, g.getOption('labelsDivStyles')); + div = document.createElement("div"); + div.className = "dygraph-legend"; + for (var name in messagestyle) { + if (!messagestyle.hasOwnProperty(name)) continue; + + try { + div.style[name] = messagestyle[name]; + } catch (e) { + console.warn("You are using unsupported css properties for your " + + "browser in labelsDivStyles"); + } + } + + // TODO(danvk): come up with a cleaner way to expose this. + g.graphDiv.appendChild(div); + this.is_generated_div_ = true; + } + + this.legend_div_ = div; + this.one_em_width_ = 10; // just a guess, will be updated. + + return { + select: this.select, + deselect: this.deselect, + // TODO(danvk): rethink the name "predraw" before we commit to it in any API. + predraw: this.predraw, + didDrawChart: this.didDrawChart + }; +}; + +// Needed for dashed lines. +var calculateEmWidthInDiv = function(div) { + var sizeSpan = document.createElement('span'); + sizeSpan.setAttribute('style', 'margin: 0; padding: 0 0 0 1em; border: 0;'); + div.appendChild(sizeSpan); + var oneEmWidth=sizeSpan.offsetWidth; + div.removeChild(sizeSpan); + return oneEmWidth; +}; + +var escapeHTML = function(str) { + return str.replace(/&/g, "&").replace(/"/g, """).replace(/</g, "<").replace(/>/g, ">"); +}; + +legend.prototype.select = function(e) { + var xValue = e.selectedX; + var points = e.selectedPoints; + + var legendMode = e.dygraph.getOption('legend'); + if (legendMode === 'never') { + this.legend_div_.style.display = 'none'; + return; + } + + if (legendMode === 'follow') { + // create floating legend div + var area = e.dygraph.plotter_.area; + var labelsDivWidth = e.dygraph.getOption('labelsDivWidth'); + var yAxisLabelWidth = e.dygraph.getOptionForAxis('axisLabelWidth', 'y'); + // determine floating [left, top] coordinates of the legend div + // within the plotter_ area + // offset 20 px to the right and down from the first selection point + // 20 px is guess based on mouse cursor size + var leftLegend = points[0].x * area.w + 20; + var topLegend = points[0].y * area.h - 20; + + // if legend floats to end of the window area, it flips to the other + // side of the selection point + if ((leftLegend + labelsDivWidth + 1) > (window.scrollX + window.innerWidth)) { + leftLegend = leftLegend - 2 * 20 - labelsDivWidth - (yAxisLabelWidth - area.x); + } + + e.dygraph.graphDiv.appendChild(this.legend_div_); + this.legend_div_.style.left = yAxisLabelWidth + leftLegend + "px"; + this.legend_div_.style.top = topLegend + "px"; + } + + var html = legend.generateLegendHTML(e.dygraph, xValue, points, this.one_em_width_); + this.legend_div_.innerHTML = html; + this.legend_div_.style.display = ''; +}; + +legend.prototype.deselect = function(e) { + var legendMode = e.dygraph.getOption('legend'); + if (legendMode !== 'always') { + this.legend_div_.style.display = "none"; + } + + // Have to do this every time, since styles might have changed. + var oneEmWidth = calculateEmWidthInDiv(this.legend_div_); + this.one_em_width_ = oneEmWidth; + + var html = legend.generateLegendHTML(e.dygraph, undefined, undefined, oneEmWidth); + this.legend_div_.innerHTML = html; +}; + +legend.prototype.didDrawChart = function(e) { + this.deselect(e); +}; + +// Right edge should be flush with the right edge of the charting area (which +// may not be the same as the right edge of the div, if we have two y-axes. +// TODO(danvk): is any of this really necessary? Could just set "right" in "activate". +/** + * Position the labels div so that: + * - its right edge is flush with the right edge of the charting area + * - its top edge is flush with the top edge of the charting area + * @private + */ +legend.prototype.predraw = function(e) { + // Don't touch a user-specified labelsDiv. + if (!this.is_generated_div_) return; + + // TODO(danvk): only use real APIs for this. + e.dygraph.graphDiv.appendChild(this.legend_div_); + var area = e.dygraph.plotter_.area; + var labelsDivWidth = e.dygraph.getOption("labelsDivWidth"); + this.legend_div_.style.left = area.x + area.w - labelsDivWidth - 1 + "px"; + this.legend_div_.style.top = area.y + "px"; + this.legend_div_.style.width = labelsDivWidth + "px"; +}; + +/** + * Called when dygraph.destroy() is called. + * You should null out any references and detach any DOM elements. + */ +legend.prototype.destroy = function() { + this.legend_div_ = null; +}; + +/** + * @private + * Generates HTML for the legend which is displayed when hovering over the + * chart. If no selected points are specified, a default legend is returned + * (this may just be the empty string). + * @param { Number } [x] The x-value of the selected points. + * @param { [Object] } [sel_points] List of selected points for the given + * x-value. Should have properties like 'name', 'yval' and 'canvasy'. + * @param { Number } [oneEmWidth] The pixel width for 1em in the legend. Only + * relevant when displaying a legend with no selection (i.e. {legend: + * 'always'}) and with dashed lines. + */ +legend.generateLegendHTML = function(g, x, sel_points, oneEmWidth) { + // TODO(danvk): deprecate this option in place of {legend: 'never'} + if (g.getOption('showLabelsOnHighlight') !== true) return ''; + + // If no points are selected, we display a default legend. Traditionally, + // this has been blank. But a better default would be a conventional legend, + // which provides essential information for a non-interactive chart. + var html, sepLines, i, dash, strokePattern; + var labels = g.getLabels(); + + if (typeof(x) === 'undefined') { + if (g.getOption('legend') != 'always') { + return ''; + } + + sepLines = g.getOption('labelsSeparateLines'); + html = ''; + for (i = 1; i < labels.length; i++) { + var series = g.getPropertiesForSeries(labels[i]); + if (!series.visible) continue; + + if (html !== '') html += (sepLines ? '<br/>' : ' '); + strokePattern = g.getOption("strokePattern", labels[i]); + dash = generateLegendDashHTML(strokePattern, series.color, oneEmWidth); + html += "<span style='font-weight: bold; color: " + series.color + ";'>" + + dash + " " + escapeHTML(labels[i]) + "</span>"; + } + return html; + } + + // TODO(danvk): remove this use of a private API + var xOptView = g.optionsViewForAxis_('x'); + var xvf = xOptView('valueFormatter'); + html = xvf(x, xOptView, labels[0], g); + if (html !== '') { + html += ':'; + } + + var yOptViews = []; + var num_axes = g.numAxes(); + for (i = 0; i < num_axes; i++) { + // TODO(danvk): remove this use of a private API + yOptViews[i] = g.optionsViewForAxis_('y' + (i ? 1 + i : '')); + } + var showZeros = g.getOption("labelsShowZeroValues"); + sepLines = g.getOption("labelsSeparateLines"); + var highlightSeries = g.getHighlightSeries(); + for (i = 0; i < sel_points.length; i++) { + var pt = sel_points[i]; + if (pt.yval === 0 && !showZeros) continue; + if (!Dygraph.isOK(pt.canvasy)) continue; + if (sepLines) html += "<br/>"; + + var series = g.getPropertiesForSeries(pt.name); + var yOptView = yOptViews[series.axis - 1]; + var fmtFunc = yOptView('valueFormatter'); + var yval = fmtFunc(pt.yval, yOptView, pt.name, g); + + var cls = (pt.name == highlightSeries) ? " class='highlight'" : ""; + + // TODO(danvk): use a template string here and make it an attribute. + html += "<span" + cls + ">" + " <b><span style='color: " + series.color + ";'>" + + escapeHTML(pt.name) + "</span></b>: " + yval + "</span>"; + } + return html; +}; + + +/** + * Generates html for the "dash" displayed on the legend when using "legend: always". + * In particular, this works for dashed lines with any stroke pattern. It will + * try to scale the pattern to fit in 1em width. Or if small enough repeat the + * pattern for 1em width. + * + * @param strokePattern The pattern + * @param color The color of the series. + * @param oneEmWidth The width in pixels of 1em in the legend. + * @private + */ +generateLegendDashHTML = function(strokePattern, color, oneEmWidth) { + // IE 7,8 fail at these divs, so they get boring legend, have not tested 9. + var isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); + if (isIE) return "—"; + + // Easy, common case: a solid line + if (!strokePattern || strokePattern.length <= 1) { + return "<div style=\"display: inline-block; position: relative; " + + "bottom: .5ex; padding-left: 1em; height: 1px; " + + "border-bottom: 2px solid " + color + ";\"></div>"; + } + + var i, j, paddingLeft, marginRight; + var strokePixelLength = 0, segmentLoop = 0; + var normalizedPattern = []; + var loop; + + // Compute the length of the pixels including the first segment twice, + // since we repeat it. + for (i = 0; i <= strokePattern.length; i++) { + strokePixelLength += strokePattern[i%strokePattern.length]; + } + + // See if we can loop the pattern by itself at least twice. + loop = Math.floor(oneEmWidth/(strokePixelLength-strokePattern[0])); + if (loop > 1) { + // This pattern fits at least two times, no scaling just convert to em; + for (i = 0; i < strokePattern.length; i++) { + normalizedPattern[i] = strokePattern[i]/oneEmWidth; + } + // Since we are repeating the pattern, we don't worry about repeating the + // first segment in one draw. + segmentLoop = normalizedPattern.length; + } else { + // If the pattern doesn't fit in the legend we scale it to fit. + loop = 1; + for (i = 0; i < strokePattern.length; i++) { + normalizedPattern[i] = strokePattern[i]/strokePixelLength; + } + // For the scaled patterns we do redraw the first segment. + segmentLoop = normalizedPattern.length+1; + } + + // Now make the pattern. + var dash = ""; + for (j = 0; j < loop; j++) { + for (i = 0; i < segmentLoop; i+=2) { + // The padding is the drawn segment. + paddingLeft = normalizedPattern[i%normalizedPattern.length]; + if (i < strokePattern.length) { + // The margin is the space segment. + marginRight = normalizedPattern[(i+1)%normalizedPattern.length]; + } else { + // The repeated first segment has no right margin. + marginRight = 0; + } + dash += "<div style=\"display: inline-block; position: relative; " + + "bottom: .5ex; margin-right: " + marginRight + "em; padding-left: " + + paddingLeft + "em; height: 1px; border-bottom: 2px solid " + color + + ";\"></div>"; + } + } + return dash; +}; + + +return legend; +})(); +/** + * @license + * Copyright 2011 Paul Felix (paul.eric.felix@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ +/*global Dygraph:false,TouchEvent:false */ + +/** + * @fileoverview This file contains the RangeSelector plugin used to provide + * a timeline range selector widget for dygraphs. + */ + +Dygraph.Plugins.RangeSelector = (function() { + +/*global Dygraph:false */ +"use strict"; + +var rangeSelector = function() { + this.isIE_ = /MSIE/.test(navigator.userAgent) && !window.opera; + this.hasTouchInterface_ = typeof(TouchEvent) != 'undefined'; + this.isMobileDevice_ = /mobile|android/gi.test(navigator.appVersion); + this.interfaceCreated_ = false; +}; + +rangeSelector.prototype.toString = function() { + return "RangeSelector Plugin"; +}; + +rangeSelector.prototype.activate = function(dygraph) { + this.dygraph_ = dygraph; + this.isUsingExcanvas_ = dygraph.isUsingExcanvas_; + if (this.getOption_('showRangeSelector')) { + this.createInterface_(); + } + return { + layout: this.reserveSpace_, + predraw: this.renderStaticLayer_, + didDrawChart: this.renderInteractiveLayer_ + }; +}; + +rangeSelector.prototype.destroy = function() { + this.bgcanvas_ = null; + this.fgcanvas_ = null; + this.leftZoomHandle_ = null; + this.rightZoomHandle_ = null; + this.iePanOverlay_ = null; +}; + +//------------------------------------------------------------------ +// Private methods +//------------------------------------------------------------------ + +rangeSelector.prototype.getOption_ = function(name, opt_series) { + return this.dygraph_.getOption(name, opt_series); +}; + +rangeSelector.prototype.setDefaultOption_ = function(name, value) { + this.dygraph_.attrs_[name] = value; +}; + +/** + * @private + * Creates the range selector elements and adds them to the graph. + */ +rangeSelector.prototype.createInterface_ = function() { + this.createCanvases_(); + if (this.isUsingExcanvas_) { + this.createIEPanOverlay_(); + } + this.createZoomHandles_(); + this.initInteraction_(); + + // Range selector and animatedZooms have a bad interaction. See issue 359. + if (this.getOption_('animatedZooms')) { + console.warn('Animated zooms and range selector are not compatible; disabling animatedZooms.'); + this.dygraph_.updateOptions({animatedZooms: false}, true); + } + + this.interfaceCreated_ = true; + this.addToGraph_(); +}; + +/** + * @private + * Adds the range selector to the graph. + */ +rangeSelector.prototype.addToGraph_ = function() { + var graphDiv = this.graphDiv_ = this.dygraph_.graphDiv; + graphDiv.appendChild(this.bgcanvas_); + graphDiv.appendChild(this.fgcanvas_); + graphDiv.appendChild(this.leftZoomHandle_); + graphDiv.appendChild(this.rightZoomHandle_); +}; + +/** + * @private + * Removes the range selector from the graph. + */ +rangeSelector.prototype.removeFromGraph_ = function() { + var graphDiv = this.graphDiv_; + graphDiv.removeChild(this.bgcanvas_); + graphDiv.removeChild(this.fgcanvas_); + graphDiv.removeChild(this.leftZoomHandle_); + graphDiv.removeChild(this.rightZoomHandle_); + this.graphDiv_ = null; +}; + +/** + * @private + * Called by Layout to allow range selector to reserve its space. + */ +rangeSelector.prototype.reserveSpace_ = function(e) { + if (this.getOption_('showRangeSelector')) { + e.reserveSpaceBottom(this.getOption_('rangeSelectorHeight') + 4); + } +}; + +/** + * @private + * Renders the static portion of the range selector at the predraw stage. + */ +rangeSelector.prototype.renderStaticLayer_ = function() { + if (!this.updateVisibility_()) { + return; + } + this.resize_(); + this.drawStaticLayer_(); +}; + +/** + * @private + * Renders the interactive portion of the range selector after the chart has been drawn. + */ +rangeSelector.prototype.renderInteractiveLayer_ = function() { + if (!this.updateVisibility_() || this.isChangingRange_) { + return; + } + this.placeZoomHandles_(); + this.drawInteractiveLayer_(); +}; + +/** + * @private + * Check to see if the range selector is enabled/disabled and update visibility accordingly. + */ +rangeSelector.prototype.updateVisibility_ = function() { + var enabled = this.getOption_('showRangeSelector'); + if (enabled) { + if (!this.interfaceCreated_) { + this.createInterface_(); + } else if (!this.graphDiv_ || !this.graphDiv_.parentNode) { + this.addToGraph_(); + } + } else if (this.graphDiv_) { + this.removeFromGraph_(); + var dygraph = this.dygraph_; + setTimeout(function() { dygraph.width_ = 0; dygraph.resize(); }, 1); + } + return enabled; +}; + +/** + * @private + * Resizes the range selector. + */ +rangeSelector.prototype.resize_ = function() { + function setElementRect(canvas, context, rect) { + var canvasScale = Dygraph.getContextPixelRatio(context); + + canvas.style.top = rect.y + 'px'; + canvas.style.left = rect.x + 'px'; + canvas.width = rect.w * canvasScale; + canvas.height = rect.h * canvasScale; + canvas.style.width = rect.w + 'px'; + canvas.style.height = rect.h + 'px'; + + if(canvasScale != 1) { + context.scale(canvasScale, canvasScale); + } + } + + var plotArea = this.dygraph_.layout_.getPlotArea(); + + var xAxisLabelHeight = 0; + if (this.dygraph_.getOptionForAxis('drawAxis', 'x')) { + xAxisLabelHeight = this.getOption_('xAxisHeight') || (this.getOption_('axisLabelFontSize') + 2 * this.getOption_('axisTickSize')); + } + this.canvasRect_ = { + x: plotArea.x, + y: plotArea.y + plotArea.h + xAxisLabelHeight + 4, + w: plotArea.w, + h: this.getOption_('rangeSelectorHeight') + }; + + setElementRect(this.bgcanvas_, this.bgcanvas_ctx_, this.canvasRect_); + setElementRect(this.fgcanvas_, this.fgcanvas_ctx_, this.canvasRect_); +}; + +/** + * @private + * Creates the background and foreground canvases. + */ +rangeSelector.prototype.createCanvases_ = function() { + this.bgcanvas_ = Dygraph.createCanvas(); + this.bgcanvas_.className = 'dygraph-rangesel-bgcanvas'; + this.bgcanvas_.style.position = 'absolute'; + this.bgcanvas_.style.zIndex = 9; + this.bgcanvas_ctx_ = Dygraph.getContext(this.bgcanvas_); + + this.fgcanvas_ = Dygraph.createCanvas(); + this.fgcanvas_.className = 'dygraph-rangesel-fgcanvas'; + this.fgcanvas_.style.position = 'absolute'; + this.fgcanvas_.style.zIndex = 9; + this.fgcanvas_.style.cursor = 'default'; + this.fgcanvas_ctx_ = Dygraph.getContext(this.fgcanvas_); +}; + +/** + * @private + * Creates overlay divs for IE/Excanvas so that mouse events are handled properly. + */ +rangeSelector.prototype.createIEPanOverlay_ = function() { + this.iePanOverlay_ = document.createElement("div"); + this.iePanOverlay_.style.position = 'absolute'; + this.iePanOverlay_.style.backgroundColor = 'white'; + this.iePanOverlay_.style.filter = 'alpha(opacity=0)'; + this.iePanOverlay_.style.display = 'none'; + this.iePanOverlay_.style.cursor = 'move'; + this.fgcanvas_.appendChild(this.iePanOverlay_); +}; + +/** + * @private + * Creates the zoom handle elements. + */ +rangeSelector.prototype.createZoomHandles_ = function() { + var img = new Image(); + img.className = 'dygraph-rangesel-zoomhandle'; + img.style.position = 'absolute'; + img.style.zIndex = 10; + img.style.visibility = 'hidden'; // Initially hidden so they don't show up in the wrong place. + img.style.cursor = 'col-resize'; + + if (/MSIE 7/.test(navigator.userAgent)) { // IE7 doesn't support embedded src data. + img.width = 7; + img.height = 14; + img.style.backgroundColor = 'white'; + img.style.border = '1px solid #333333'; // Just show box in IE7. + } else { + img.width = 9; + img.height = 16; + img.src = 'data:image/png;base64,' + +'iVBORw0KGgoAAAANSUhEUgAAAAkAAAAQCAYAAADESFVDAAAAAXNSR0IArs4c6QAAAAZiS0dEANAA' + +'zwDP4Z7KegAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sHGw0cMqdt1UwAAAAZdEVYdENv' + +'bW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAaElEQVQoz+3SsRFAQBCF4Z9WJM8KCDVwownl' + +'6YXsTmCUsyKGkZzcl7zkz3YLkypgAnreFmDEpHkIwVOMfpdi9CEEN2nGpFdwD03yEqDtOgCaun7s' + +'qSTDH32I1pQA2Pb9sZecAxc5r3IAb21d6878xsAAAAAASUVORK5CYII='; + } + + if (this.isMobileDevice_) { + img.width *= 2; + img.height *= 2; + } + + this.leftZoomHandle_ = img; + this.rightZoomHandle_ = img.cloneNode(false); +}; + +/** + * @private + * Sets up the interaction for the range selector. + */ +rangeSelector.prototype.initInteraction_ = function() { + var self = this; + var topElem = document; + var clientXLast = 0; + var handle = null; + var isZooming = false; + var isPanning = false; + var dynamic = !this.isMobileDevice_ && !this.isUsingExcanvas_; + + // We cover iframes during mouse interactions. See comments in + // dygraph-utils.js for more info on why this is a good idea. + var tarp = new Dygraph.IFrameTarp(); + + // functions, defined below. Defining them this way (rather than with + // "function foo() {...}" makes JSHint happy. + var toXDataWindow, onZoomStart, onZoom, onZoomEnd, doZoom, isMouseInPanZone, + onPanStart, onPan, onPanEnd, doPan, onCanvasHover; + + // Touch event functions + var onZoomHandleTouchEvent, onCanvasTouchEvent, addTouchEvents; + + toXDataWindow = function(zoomHandleStatus) { + var xDataLimits = self.dygraph_.xAxisExtremes(); + var fact = (xDataLimits[1] - xDataLimits[0])/self.canvasRect_.w; + var xDataMin = xDataLimits[0] + (zoomHandleStatus.leftHandlePos - self.canvasRect_.x)*fact; + var xDataMax = xDataLimits[0] + (zoomHandleStatus.rightHandlePos - self.canvasRect_.x)*fact; + return [xDataMin, xDataMax]; + }; + + onZoomStart = function(e) { + Dygraph.cancelEvent(e); + isZooming = true; + clientXLast = e.clientX; + handle = e.target ? e.target : e.srcElement; + if (e.type === 'mousedown' || e.type === 'dragstart') { + // These events are removed manually. + Dygraph.addEvent(topElem, 'mousemove', onZoom); + Dygraph.addEvent(topElem, 'mouseup', onZoomEnd); + } + self.fgcanvas_.style.cursor = 'col-resize'; + tarp.cover(); + return true; + }; + + onZoom = function(e) { + if (!isZooming) { + return false; + } + Dygraph.cancelEvent(e); + + var delX = e.clientX - clientXLast; + if (Math.abs(delX) < 4) { + return true; + } + clientXLast = e.clientX; + + // Move handle. + var zoomHandleStatus = self.getZoomHandleStatus_(); + var newPos; + if (handle == self.leftZoomHandle_) { + newPos = zoomHandleStatus.leftHandlePos + delX; + newPos = Math.min(newPos, zoomHandleStatus.rightHandlePos - handle.width - 3); + newPos = Math.max(newPos, self.canvasRect_.x); + } else { + newPos = zoomHandleStatus.rightHandlePos + delX; + newPos = Math.min(newPos, self.canvasRect_.x + self.canvasRect_.w); + newPos = Math.max(newPos, zoomHandleStatus.leftHandlePos + handle.width + 3); + } + var halfHandleWidth = handle.width/2; + handle.style.left = (newPos - halfHandleWidth) + 'px'; + self.drawInteractiveLayer_(); + + // Zoom on the fly (if not using excanvas). + if (dynamic) { + doZoom(); + } + return true; + }; + + onZoomEnd = function(e) { + if (!isZooming) { + return false; + } + isZooming = false; + tarp.uncover(); + Dygraph.removeEvent(topElem, 'mousemove', onZoom); + Dygraph.removeEvent(topElem, 'mouseup', onZoomEnd); + self.fgcanvas_.style.cursor = 'default'; + + // If using excanvas, Zoom now. + if (!dynamic) { + doZoom(); + } + return true; + }; + + doZoom = function() { + try { + var zoomHandleStatus = self.getZoomHandleStatus_(); + self.isChangingRange_ = true; + if (!zoomHandleStatus.isZoomed) { + self.dygraph_.resetZoom(); + } else { + var xDataWindow = toXDataWindow(zoomHandleStatus); + self.dygraph_.doZoomXDates_(xDataWindow[0], xDataWindow[1]); + } + } finally { + self.isChangingRange_ = false; + } + }; + + isMouseInPanZone = function(e) { + if (self.isUsingExcanvas_) { + return e.srcElement == self.iePanOverlay_; + } else { + var rect = self.leftZoomHandle_.getBoundingClientRect(); + var leftHandleClientX = rect.left + rect.width/2; + rect = self.rightZoomHandle_.getBoundingClientRect(); + var rightHandleClientX = rect.left + rect.width/2; + return (e.clientX > leftHandleClientX && e.clientX < rightHandleClientX); + } + }; + + onPanStart = function(e) { + if (!isPanning && isMouseInPanZone(e) && self.getZoomHandleStatus_().isZoomed) { + Dygraph.cancelEvent(e); + isPanning = true; + clientXLast = e.clientX; + if (e.type === 'mousedown') { + // These events are removed manually. + Dygraph.addEvent(topElem, 'mousemove', onPan); + Dygraph.addEvent(topElem, 'mouseup', onPanEnd); + } + return true; + } + return false; + }; + + onPan = function(e) { + if (!isPanning) { + return false; + } + Dygraph.cancelEvent(e); + + var delX = e.clientX - clientXLast; + if (Math.abs(delX) < 4) { + return true; + } + clientXLast = e.clientX; + + // Move range view + var zoomHandleStatus = self.getZoomHandleStatus_(); + var leftHandlePos = zoomHandleStatus.leftHandlePos; + var rightHandlePos = zoomHandleStatus.rightHandlePos; + var rangeSize = rightHandlePos - leftHandlePos; + if (leftHandlePos + delX <= self.canvasRect_.x) { + leftHandlePos = self.canvasRect_.x; + rightHandlePos = leftHandlePos + rangeSize; + } else if (rightHandlePos + delX >= self.canvasRect_.x + self.canvasRect_.w) { + rightHandlePos = self.canvasRect_.x + self.canvasRect_.w; + leftHandlePos = rightHandlePos - rangeSize; + } else { + leftHandlePos += delX; + rightHandlePos += delX; + } + var halfHandleWidth = self.leftZoomHandle_.width/2; + self.leftZoomHandle_.style.left = (leftHandlePos - halfHandleWidth) + 'px'; + self.rightZoomHandle_.style.left = (rightHandlePos - halfHandleWidth) + 'px'; + self.drawInteractiveLayer_(); + + // Do pan on the fly (if not using excanvas). + if (dynamic) { + doPan(); + } + return true; + }; + + onPanEnd = function(e) { + if (!isPanning) { + return false; + } + isPanning = false; + Dygraph.removeEvent(topElem, 'mousemove', onPan); + Dygraph.removeEvent(topElem, 'mouseup', onPanEnd); + // If using excanvas, do pan now. + if (!dynamic) { + doPan(); + } + return true; + }; + + doPan = function() { + try { + self.isChangingRange_ = true; + self.dygraph_.dateWindow_ = toXDataWindow(self.getZoomHandleStatus_()); + self.dygraph_.drawGraph_(false); + } finally { + self.isChangingRange_ = false; + } + }; + + onCanvasHover = function(e) { + if (isZooming || isPanning) { + return; + } + var cursor = isMouseInPanZone(e) ? 'move' : 'default'; + if (cursor != self.fgcanvas_.style.cursor) { + self.fgcanvas_.style.cursor = cursor; + } + }; + + onZoomHandleTouchEvent = function(e) { + if (e.type == 'touchstart' && e.targetTouches.length == 1) { + if (onZoomStart(e.targetTouches[0])) { + Dygraph.cancelEvent(e); + } + } else if (e.type == 'touchmove' && e.targetTouches.length == 1) { + if (onZoom(e.targetTouches[0])) { + Dygraph.cancelEvent(e); + } + } else { + onZoomEnd(e); + } + }; + + onCanvasTouchEvent = function(e) { + if (e.type == 'touchstart' && e.targetTouches.length == 1) { + if (onPanStart(e.targetTouches[0])) { + Dygraph.cancelEvent(e); + } + } else if (e.type == 'touchmove' && e.targetTouches.length == 1) { + if (onPan(e.targetTouches[0])) { + Dygraph.cancelEvent(e); + } + } else { + onPanEnd(e); + } + }; + + addTouchEvents = function(elem, fn) { + var types = ['touchstart', 'touchend', 'touchmove', 'touchcancel']; + for (var i = 0; i < types.length; i++) { + self.dygraph_.addAndTrackEvent(elem, types[i], fn); + } + }; + + this.setDefaultOption_('interactionModel', Dygraph.Interaction.dragIsPanInteractionModel); + this.setDefaultOption_('panEdgeFraction', 0.0001); + + var dragStartEvent = window.opera ? 'mousedown' : 'dragstart'; + this.dygraph_.addAndTrackEvent(this.leftZoomHandle_, dragStartEvent, onZoomStart); + this.dygraph_.addAndTrackEvent(this.rightZoomHandle_, dragStartEvent, onZoomStart); + + if (this.isUsingExcanvas_) { + this.dygraph_.addAndTrackEvent(this.iePanOverlay_, 'mousedown', onPanStart); + } else { + this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousedown', onPanStart); + this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousemove', onCanvasHover); + } + + // Touch events + if (this.hasTouchInterface_) { + addTouchEvents(this.leftZoomHandle_, onZoomHandleTouchEvent); + addTouchEvents(this.rightZoomHandle_, onZoomHandleTouchEvent); + addTouchEvents(this.fgcanvas_, onCanvasTouchEvent); + } +}; + +/** + * @private + * Draws the static layer in the background canvas. + */ +rangeSelector.prototype.drawStaticLayer_ = function() { + var ctx = this.bgcanvas_ctx_; + ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h); + try { + this.drawMiniPlot_(); + } catch(ex) { + console.warn(ex); + } + + var margin = 0.5; + this.bgcanvas_ctx_.lineWidth = 1; + ctx.strokeStyle = 'gray'; + ctx.beginPath(); + ctx.moveTo(margin, margin); + ctx.lineTo(margin, this.canvasRect_.h-margin); + ctx.lineTo(this.canvasRect_.w-margin, this.canvasRect_.h-margin); + ctx.lineTo(this.canvasRect_.w-margin, margin); + ctx.stroke(); +}; + + +/** + * @private + * Draws the mini plot in the background canvas. + */ +rangeSelector.prototype.drawMiniPlot_ = function() { + var fillStyle = this.getOption_('rangeSelectorPlotFillColor'); + var strokeStyle = this.getOption_('rangeSelectorPlotStrokeColor'); + if (!fillStyle && !strokeStyle) { + return; + } + + var stepPlot = this.getOption_('stepPlot'); + + var combinedSeriesData = this.computeCombinedSeriesAndLimits_(); + var yRange = combinedSeriesData.yMax - combinedSeriesData.yMin; + + // Draw the mini plot. + var ctx = this.bgcanvas_ctx_; + var margin = 0.5; + + var xExtremes = this.dygraph_.xAxisExtremes(); + var xRange = Math.max(xExtremes[1] - xExtremes[0], 1.e-30); + var xFact = (this.canvasRect_.w - margin)/xRange; + var yFact = (this.canvasRect_.h - margin)/yRange; + var canvasWidth = this.canvasRect_.w - margin; + var canvasHeight = this.canvasRect_.h - margin; + + var prevX = null, prevY = null; + + ctx.beginPath(); + ctx.moveTo(margin, canvasHeight); + for (var i = 0; i < combinedSeriesData.data.length; i++) { + var dataPoint = combinedSeriesData.data[i]; + var x = ((dataPoint[0] !== null) ? ((dataPoint[0] - xExtremes[0])*xFact) : NaN); + var y = ((dataPoint[1] !== null) ? (canvasHeight - (dataPoint[1] - combinedSeriesData.yMin)*yFact) : NaN); + + // Skip points that don't change the x-value. Overly fine-grained points + // can cause major slowdowns with the ctx.fill() call below. + if (!stepPlot && prevX !== null && Math.round(x) == Math.round(prevX)) { + continue; + } + + if (isFinite(x) && isFinite(y)) { + if(prevX === null) { + ctx.lineTo(x, canvasHeight); + } + else if (stepPlot) { + ctx.lineTo(x, prevY); + } + ctx.lineTo(x, y); + prevX = x; + prevY = y; + } + else { + if(prevX !== null) { + if (stepPlot) { + ctx.lineTo(x, prevY); + ctx.lineTo(x, canvasHeight); + } + else { + ctx.lineTo(prevX, canvasHeight); + } + } + prevX = prevY = null; + } + } + ctx.lineTo(canvasWidth, canvasHeight); + ctx.closePath(); + + if (fillStyle) { + var lingrad = this.bgcanvas_ctx_.createLinearGradient(0, 0, 0, canvasHeight); + lingrad.addColorStop(0, 'white'); + lingrad.addColorStop(1, fillStyle); + this.bgcanvas_ctx_.fillStyle = lingrad; + ctx.fill(); + } + + if (strokeStyle) { + this.bgcanvas_ctx_.strokeStyle = strokeStyle; + this.bgcanvas_ctx_.lineWidth = 1.5; + ctx.stroke(); + } +}; + +/** + * @private + * Computes and returns the combined series data along with min/max for the mini plot. + * The combined series consists of averaged values for all series. + * When series have error bars, the error bars are ignored. + * @return {Object} An object containing combined series array, ymin, ymax. + */ +rangeSelector.prototype.computeCombinedSeriesAndLimits_ = function() { + var g = this.dygraph_; + var logscale = this.getOption_('logscale'); + var i; + + // Select series to combine. By default, all series are combined. + var numColumns = g.numColumns(); + var labels = g.getLabels(); + var includeSeries = new Array(numColumns); + var anySet = false; + for (i = 1; i < numColumns; i++) { + var include = this.getOption_('showInRangeSelector', labels[i]); + includeSeries[i] = include; + if (include !== null) anySet = true; // it's set explicitly for this series + } + if (!anySet) { + for (i = 0; i < includeSeries.length; i++) includeSeries[i] = true; + } + + // Create a combined series (average of selected series values). + // TODO(danvk): short-circuit if there's only one series. + var rolledSeries = []; + var dataHandler = g.dataHandler_; + var options = g.attributes_; + for (i = 1; i < g.numColumns(); i++) { + if (!includeSeries[i]) continue; + var series = dataHandler.extractSeries(g.rawData_, i, options); + if (g.rollPeriod() > 1) { + series = dataHandler.rollingAverage(series, g.rollPeriod(), options); + } + + rolledSeries.push(series); + } + + var combinedSeries = []; + for (i = 0; i < rolledSeries[0].length; i++) { + var sum = 0; + var count = 0; + for (var j = 0; j < rolledSeries.length; j++) { + var y = rolledSeries[j][i][1]; + if (y === null || isNaN(y)) continue; + count++; + sum += y; + } + combinedSeries.push([rolledSeries[0][i][0], sum / count]); + } + + // Compute the y range. + var yMin = Number.MAX_VALUE; + var yMax = -Number.MAX_VALUE; + for (i = 0; i < combinedSeries.length; i++) { + var yVal = combinedSeries[i][1]; + if (yVal !== null && isFinite(yVal) && (!logscale || yVal > 0)) { + yMin = Math.min(yMin, yVal); + yMax = Math.max(yMax, yVal); + } + } + + // Convert Y data to log scale if needed. + // Also, expand the Y range to compress the mini plot a little. + var extraPercent = 0.25; + if (logscale) { + yMax = Dygraph.log10(yMax); + yMax += yMax*extraPercent; + yMin = Dygraph.log10(yMin); + for (i = 0; i < combinedSeries.length; i++) { + combinedSeries[i][1] = Dygraph.log10(combinedSeries[i][1]); + } + } else { + var yExtra; + var yRange = yMax - yMin; + if (yRange <= Number.MIN_VALUE) { + yExtra = yMax*extraPercent; + } else { + yExtra = yRange*extraPercent; + } + yMax += yExtra; + yMin -= yExtra; + } + + return {data: combinedSeries, yMin: yMin, yMax: yMax}; +}; + +/** + * @private + * Places the zoom handles in the proper position based on the current X data window. + */ +rangeSelector.prototype.placeZoomHandles_ = function() { + var xExtremes = this.dygraph_.xAxisExtremes(); + var xWindowLimits = this.dygraph_.xAxisRange(); + var xRange = xExtremes[1] - xExtremes[0]; + var leftPercent = Math.max(0, (xWindowLimits[0] - xExtremes[0])/xRange); + var rightPercent = Math.max(0, (xExtremes[1] - xWindowLimits[1])/xRange); + var leftCoord = this.canvasRect_.x + this.canvasRect_.w*leftPercent; + var rightCoord = this.canvasRect_.x + this.canvasRect_.w*(1 - rightPercent); + var handleTop = Math.max(this.canvasRect_.y, this.canvasRect_.y + (this.canvasRect_.h - this.leftZoomHandle_.height)/2); + var halfHandleWidth = this.leftZoomHandle_.width/2; + this.leftZoomHandle_.style.left = (leftCoord - halfHandleWidth) + 'px'; + this.leftZoomHandle_.style.top = handleTop + 'px'; + this.rightZoomHandle_.style.left = (rightCoord - halfHandleWidth) + 'px'; + this.rightZoomHandle_.style.top = this.leftZoomHandle_.style.top; + + this.leftZoomHandle_.style.visibility = 'visible'; + this.rightZoomHandle_.style.visibility = 'visible'; +}; + +/** + * @private + * Draws the interactive layer in the foreground canvas. + */ +rangeSelector.prototype.drawInteractiveLayer_ = function() { + var ctx = this.fgcanvas_ctx_; + ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h); + var margin = 1; + var width = this.canvasRect_.w - margin; + var height = this.canvasRect_.h - margin; + var zoomHandleStatus = this.getZoomHandleStatus_(); + + ctx.strokeStyle = 'black'; + if (!zoomHandleStatus.isZoomed) { + ctx.beginPath(); + ctx.moveTo(margin, margin); + ctx.lineTo(margin, height); + ctx.lineTo(width, height); + ctx.lineTo(width, margin); + ctx.stroke(); + if (this.iePanOverlay_) { + this.iePanOverlay_.style.display = 'none'; + } + } else { + var leftHandleCanvasPos = Math.max(margin, zoomHandleStatus.leftHandlePos - this.canvasRect_.x); + var rightHandleCanvasPos = Math.min(width, zoomHandleStatus.rightHandlePos - this.canvasRect_.x); + + ctx.fillStyle = 'rgba(240, 240, 240, 0.6)'; + ctx.fillRect(0, 0, leftHandleCanvasPos, this.canvasRect_.h); + ctx.fillRect(rightHandleCanvasPos, 0, this.canvasRect_.w - rightHandleCanvasPos, this.canvasRect_.h); + + ctx.beginPath(); + ctx.moveTo(margin, margin); + ctx.lineTo(leftHandleCanvasPos, margin); + ctx.lineTo(leftHandleCanvasPos, height); + ctx.lineTo(rightHandleCanvasPos, height); + ctx.lineTo(rightHandleCanvasPos, margin); + ctx.lineTo(width, margin); + ctx.stroke(); + + if (this.isUsingExcanvas_) { + this.iePanOverlay_.style.width = (rightHandleCanvasPos - leftHandleCanvasPos) + 'px'; + this.iePanOverlay_.style.left = leftHandleCanvasPos + 'px'; + this.iePanOverlay_.style.height = height + 'px'; + this.iePanOverlay_.style.display = 'inline'; + } + } +}; + +/** + * @private + * Returns the current zoom handle position information. + * @return {Object} The zoom handle status. + */ +rangeSelector.prototype.getZoomHandleStatus_ = function() { + var halfHandleWidth = this.leftZoomHandle_.width/2; + var leftHandlePos = parseFloat(this.leftZoomHandle_.style.left) + halfHandleWidth; + var rightHandlePos = parseFloat(this.rightZoomHandle_.style.left) + halfHandleWidth; + return { + leftHandlePos: leftHandlePos, + rightHandlePos: rightHandlePos, + isZoomed: (leftHandlePos - 1 > this.canvasRect_.x || rightHandlePos + 1 < this.canvasRect_.x+this.canvasRect_.w) + }; +}; + +return rangeSelector; + +})(); +/*global Dygraph:false */ + +// This file defines the ordering of the plugins. +// +// The ordering is from most-general to most-specific. +// This means that, in an event cascade, plugins which have registered for that +// event will be called in reverse order. +// +// This is most relevant for plugins which register a layout event, e.g. +// Axes, Legend and ChartLabels. + +Dygraph.PLUGINS.push( + Dygraph.Plugins.Legend, + Dygraph.Plugins.Axes, + Dygraph.Plugins.RangeSelector, // Has to be before ChartLabels so that its callbacks are called after ChartLabels' callbacks. + Dygraph.Plugins.ChartLabels, + Dygraph.Plugins.Annotations, + Dygraph.Plugins.Grid +); +/** + * @license + * Copyright 2013 David Eberlein (david.eberlein@ch.sauter-bc.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview This file contains the managment of data handlers + * @author David Eberlein (david.eberlein@ch.sauter-bc.com) + * + * The idea is to define a common, generic data format that works for all data + * structures supported by dygraphs. To make this possible, the DataHandler + * interface is introduced. This makes it possible, that dygraph itself can work + * with the same logic for every data type independent of the actual format and + * the DataHandler takes care of the data format specific jobs. + * DataHandlers are implemented for all data types supported by Dygraphs and + * return Dygraphs compliant formats. + * By default the correct DataHandler is chosen based on the options set. + * Optionally the user may use his own DataHandler (similar to the plugin + * system). + * + * + * The unified data format returend by each handler is defined as so: + * series[n][point] = [x,y,(extras)] + * + * This format contains the common basis that is needed to draw a simple line + * series extended by optional extras for more complex graphing types. It + * contains a primitive x value as first array entry, a primitive y value as + * second array entry and an optional extras object for additional data needed. + * + * x must always be a number. + * y must always be a number, NaN of type number or null. + * extras is optional and must be interpreted by the DataHandler. It may be of + * any type. + * + * In practice this might look something like this: + * default: [x, yVal] + * errorBar / customBar: [x, yVal, [yTopVariance, yBottomVariance] ] + * + */ +/*global Dygraph:false */ +/*global DygraphLayout:false */ + +/** + * + * The data handler is responsible for all data specific operations. All of the + * series data it receives and returns is always in the unified data format. + * Initially the unified data is created by the extractSeries method + * @constructor + */ +Dygraph.DataHandler = function () { +}; + +/** + * A collection of functions to create and retrieve data handlers. + * @type {Object.<!Dygraph.DataHandler>} + */ +Dygraph.DataHandlers = {}; + +(function() { + +"use strict"; + +var handler = Dygraph.DataHandler; + +/** + * X-value array index constant for unified data samples. + * @const + * @type {number} + */ +handler.X = 0; + +/** + * Y-value array index constant for unified data samples. + * @const + * @type {number} + */ +handler.Y = 1; + +/** + * Extras-value array index constant for unified data samples. + * @const + * @type {number} + */ +handler.EXTRAS = 2; + +/** + * Extracts one series from the raw data (a 2D array) into an array of the + * unified data format. + * This is where undesirable points (i.e. negative values on log scales and + * missing values through which we wish to connect lines) are dropped. + * TODO(danvk): the "missing values" bit above doesn't seem right. + * + * @param {!Array.<Array>} rawData The raw data passed into dygraphs where + * rawData[i] = [x,ySeries1,...,ySeriesN]. + * @param {!number} seriesIndex Index of the series to extract. All other + * series should be ignored. + * @param {!DygraphOptions} options Dygraph options. + * @return {Array.<[!number,?number,?]>} The series in the unified data format + * where series[i] = [x,y,{extras}]. + */ +handler.prototype.extractSeries = function(rawData, seriesIndex, options) { +}; + +/** + * Converts a series to a Point array. The resulting point array must be + * returned in increasing order of idx property. + * + * @param {!Array.<[!number,?number,?]>} series The series in the unified + * data format where series[i] = [x,y,{extras}]. + * @param {!string} setName Name of the series. + * @param {!number} boundaryIdStart Index offset of the first point, equal to the + * number of skipped points left of the date window minimum (if any). + * @return {!Array.<Dygraph.PointType>} List of points for this series. + */ +handler.prototype.seriesToPoints = function(series, setName, boundaryIdStart) { + // TODO(bhs): these loops are a hot-spot for high-point-count charts. In + // fact, + // on chrome+linux, they are 6 times more expensive than iterating through + // the + // points and drawing the lines. The brunt of the cost comes from allocating + // the |point| structures. + var points = []; + for ( var i = 0; i < series.length; ++i) { + var item = series[i]; + var yraw = item[1]; + var yval = yraw === null ? null : handler.parseFloat(yraw); + var point = { + x : NaN, + y : NaN, + xval : handler.parseFloat(item[0]), + yval : yval, + name : setName, // TODO(danvk): is this really necessary? + idx : i + boundaryIdStart + }; + points.push(point); + } + this.onPointsCreated_(series, points); + return points; +}; + +/** + * Callback called for each series after the series points have been generated + * which will later be used by the plotters to draw the graph. + * Here data may be added to the seriesPoints which is needed by the plotters. + * The indexes of series and points are in sync meaning the original data + * sample for series[i] is points[i]. + * + * @param {!Array.<[!number,?number,?]>} series The series in the unified + * data format where series[i] = [x,y,{extras}]. + * @param {!Array.<Dygraph.PointType>} points The corresponding points passed + * to the plotter. + * @protected + */ +handler.prototype.onPointsCreated_ = function(series, points) { +}; + +/** + * Calculates the rolling average of a data set. + * + * @param {!Array.<[!number,?number,?]>} series The series in the unified + * data format where series[i] = [x,y,{extras}]. + * @param {!number} rollPeriod The number of points over which to average the data + * @param {!DygraphOptions} options The dygraph options. + * @return {!Array.<[!number,?number,?]>} the rolled series. + */ +handler.prototype.rollingAverage = function(series, rollPeriod, options) { +}; + +/** + * Computes the range of the data series (including confidence intervals). + * + * @param {!Array.<[!number,?number,?]>} series The series in the unified + * data format where series[i] = [x, y, {extras}]. + * @param {!Array.<number>} dateWindow The x-value range to display with + * the format: [min, max]. + * @param {!DygraphOptions} options The dygraph options. + * @return {Array.<number>} The low and high extremes of the series in the + * given window with the format: [low, high]. + */ +handler.prototype.getExtremeYValues = function(series, dateWindow, options) { +}; + +/** + * Callback called for each series after the layouting data has been + * calculated before the series is drawn. Here normalized positioning data + * should be calculated for the extras of each point. + * + * @param {!Array.<Dygraph.PointType>} points The points passed to + * the plotter. + * @param {!Object} axis The axis on which the series will be plotted. + * @param {!boolean} logscale Weather or not to use a logscale. + */ +handler.prototype.onLineEvaluated = function(points, axis, logscale) { +}; + +/** + * Helper method that computes the y value of a line defined by the points p1 + * and p2 and a given x value. + * + * @param {!Array.<number>} p1 left point ([x,y]). + * @param {!Array.<number>} p2 right point ([x,y]). + * @param {!number} xValue The x value to compute the y-intersection for. + * @return {number} corresponding y value to x on the line defined by p1 and p2. + * @private + */ +handler.prototype.computeYInterpolation_ = function(p1, p2, xValue) { + var deltaY = p2[1] - p1[1]; + var deltaX = p2[0] - p1[0]; + var gradient = deltaY / deltaX; + var growth = (xValue - p1[0]) * gradient; + return p1[1] + growth; +}; + +/** + * Helper method that returns the first and the last index of the given series + * that lie inside the given dateWindow. + * + * @param {!Array.<[!number,?number,?]>} series The series in the unified + * data format where series[i] = [x,y,{extras}]. + * @param {!Array.<number>} dateWindow The x-value range to display with + * the format: [min,max]. + * @return {!Array.<[!number,?number,?]>} The samples of the series that + * are in the given date window. + * @private + */ +handler.prototype.getIndexesInWindow_ = function(series, dateWindow) { + var firstIdx = 0, lastIdx = series.length - 1; + if (dateWindow) { + var idx = 0; + var low = dateWindow[0]; + var high = dateWindow[1]; + + // Start from each side of the array to minimize the performance + // needed. + while (idx < series.length - 1 && series[idx][0] < low) { + firstIdx++; + idx++; + } + idx = series.length - 1; + while (idx > 0 && series[idx][0] > high) { + lastIdx--; + idx--; + } + } + if (firstIdx <= lastIdx) { + return [ firstIdx, lastIdx ]; + } else { + return [ 0, series.length - 1 ]; + } +}; + +/** + * Optimized replacement for parseFloat, which was way too slow when almost + * all values were type number, with few edge cases, none of which were strings. + * @param {?number} val + * @return {number} + * @protected + */ +handler.parseFloat = function(val) { + // parseFloat(null) is NaN + if (val === null) { + return NaN; + } + + // Assume it's a number or NaN. If it's something else, I'll be shocked. + return val; +}; + +})(); +/** + * @license + * Copyright 2013 David Eberlein (david.eberlein@ch.sauter-bc.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview DataHandler default implementation used for simple line charts. + * @author David Eberlein (david.eberlein@ch.sauter-bc.com) + */ + +(function() { + +/*global Dygraph:false */ +"use strict"; + +/** + * @constructor + * @extends Dygraph.DataHandler + */ +Dygraph.DataHandlers.DefaultHandler = function() { +}; + +var DefaultHandler = Dygraph.DataHandlers.DefaultHandler; +DefaultHandler.prototype = new Dygraph.DataHandler(); + +/** @inheritDoc */ +DefaultHandler.prototype.extractSeries = function(rawData, i, options) { + // TODO(danvk): pre-allocate series here. + var series = []; + var logScale = options.get('logscale'); + for ( var j = 0; j < rawData.length; j++) { + var x = rawData[j][0]; + var point = rawData[j][i]; + if (logScale) { + // On the log scale, points less than zero do not exist. + // This will create a gap in the chart. + if (point <= 0) { + point = null; + } + } + series.push([ x, point ]); + } + return series; +}; + +/** @inheritDoc */ +DefaultHandler.prototype.rollingAverage = function(originalData, rollPeriod, + options) { + rollPeriod = Math.min(rollPeriod, originalData.length); + var rollingData = []; + + var i, j, y, sum, num_ok; + // Calculate the rolling average for the first rollPeriod - 1 points + // where + // there is not enough data to roll over the full number of points + if (rollPeriod == 1) { + return originalData; + } + for (i = 0; i < originalData.length; i++) { + sum = 0; + num_ok = 0; + for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { + y = originalData[j][1]; + if (y === null || isNaN(y)) + continue; + num_ok++; + sum += originalData[j][1]; + } + if (num_ok) { + rollingData[i] = [ originalData[i][0], sum / num_ok ]; + } else { + rollingData[i] = [ originalData[i][0], null ]; + } + } + + return rollingData; +}; + +/** @inheritDoc */ +DefaultHandler.prototype.getExtremeYValues = function(series, dateWindow, + options) { + var minY = null, maxY = null, y; + var firstIdx = 0, lastIdx = series.length - 1; + + for ( var j = firstIdx; j <= lastIdx; j++) { + y = series[j][1]; + if (y === null || isNaN(y)) + continue; + if (maxY === null || y > maxY) { + maxY = y; + } + if (minY === null || y < minY) { + minY = y; + } + } + return [ minY, maxY ]; +}; + +})(); +/** + * @license + * Copyright 2013 David Eberlein (david.eberlein@ch.sauter-bc.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview DataHandler implementation for the fractions option. + * @author David Eberlein (david.eberlein@ch.sauter-bc.com) + */ + +(function() { + +/*global Dygraph:false */ +"use strict"; + +/** + * @extends Dygraph.DataHandlers.DefaultHandler + * @constructor + */ +Dygraph.DataHandlers.DefaultFractionHandler = function() { +}; + +var DefaultFractionHandler = Dygraph.DataHandlers.DefaultFractionHandler; +DefaultFractionHandler.prototype = new Dygraph.DataHandlers.DefaultHandler(); + +DefaultFractionHandler.prototype.extractSeries = function(rawData, i, options) { + // TODO(danvk): pre-allocate series here. + var series = []; + var x, y, point, num, den, value; + var mult = 100.0; + var logScale = options.get('logscale'); + for ( var j = 0; j < rawData.length; j++) { + x = rawData[j][0]; + point = rawData[j][i]; + if (logScale && point !== null) { + // On the log scale, points less than zero do not exist. + // This will create a gap in the chart. + if (point[0] <= 0 || point[1] <= 0) { + point = null; + } + } + // Extract to the unified data format. + if (point !== null) { + num = point[0]; + den = point[1]; + if (num !== null && !isNaN(num)) { + value = den ? num / den : 0.0; + y = mult * value; + // preserve original values in extras for further filtering + series.push([ x, y, [ num, den ] ]); + } else { + series.push([ x, num, [ num, den ] ]); + } + } else { + series.push([ x, null, [ null, null ] ]); + } + } + return series; +}; + +DefaultFractionHandler.prototype.rollingAverage = function(originalData, rollPeriod, + options) { + rollPeriod = Math.min(rollPeriod, originalData.length); + var rollingData = []; + + var i; + var num = 0; + var den = 0; // numerator/denominator + var mult = 100.0; + for (i = 0; i < originalData.length; i++) { + num += originalData[i][2][0]; + den += originalData[i][2][1]; + if (i - rollPeriod >= 0) { + num -= originalData[i - rollPeriod][2][0]; + den -= originalData[i - rollPeriod][2][1]; + } + + var date = originalData[i][0]; + var value = den ? num / den : 0.0; + rollingData[i] = [ date, mult * value ]; + } + + return rollingData; +}; + +})(); +/** + * @license + * Copyright 2013 David Eberlein (david.eberlein@ch.sauter-bc.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview DataHandler base implementation for the "bar" + * data formats. This implementation must be extended and the + * extractSeries and rollingAverage must be implemented. + * @author David Eberlein (david.eberlein@ch.sauter-bc.com) + */ + +(function() { + +/*global Dygraph:false */ +/*global DygraphLayout:false */ +"use strict"; + +/** + * @constructor + * @extends {Dygraph.DataHandler} + */ +Dygraph.DataHandlers.BarsHandler = function() { + Dygraph.DataHandler.call(this); +}; +Dygraph.DataHandlers.BarsHandler.prototype = new Dygraph.DataHandler(); + +// alias for the rest of the implementation +var BarsHandler = Dygraph.DataHandlers.BarsHandler; + +// TODO(danvk): figure out why the jsdoc has to be copy/pasted from superclass. +// (I get closure compiler errors if this isn't here.) +/** + * @override + * @param {!Array.<Array>} rawData The raw data passed into dygraphs where + * rawData[i] = [x,ySeries1,...,ySeriesN]. + * @param {!number} seriesIndex Index of the series to extract. All other + * series should be ignored. + * @param {!DygraphOptions} options Dygraph options. + * @return {Array.<[!number,?number,?]>} The series in the unified data format + * where series[i] = [x,y,{extras}]. + */ +BarsHandler.prototype.extractSeries = function(rawData, seriesIndex, options) { + // Not implemented here must be extended +}; + +/** + * @override + * @param {!Array.<[!number,?number,?]>} series The series in the unified + * data format where series[i] = [x,y,{extras}]. + * @param {!number} rollPeriod The number of points over which to average the data + * @param {!DygraphOptions} options The dygraph options. + * TODO(danvk): be more specific than "Array" here. + * @return {!Array.<[!number,?number,?]>} the rolled series. + */ +BarsHandler.prototype.rollingAverage = + function(series, rollPeriod, options) { + // Not implemented here, must be extended. +}; + +/** @inheritDoc */ +BarsHandler.prototype.onPointsCreated_ = function(series, points) { + for (var i = 0; i < series.length; ++i) { + var item = series[i]; + var point = points[i]; + point.y_top = NaN; + point.y_bottom = NaN; + point.yval_minus = Dygraph.DataHandler.parseFloat(item[2][0]); + point.yval_plus = Dygraph.DataHandler.parseFloat(item[2][1]); + } +}; + +/** @inheritDoc */ +BarsHandler.prototype.getExtremeYValues = function(series, dateWindow, options) { + var minY = null, maxY = null, y; + + var firstIdx = 0; + var lastIdx = series.length - 1; + + for ( var j = firstIdx; j <= lastIdx; j++) { + y = series[j][1]; + if (y === null || isNaN(y)) continue; + + var low = series[j][2][0]; + var high = series[j][2][1]; + + if (low > y) low = y; // this can happen with custom bars, + if (high < y) high = y; // e.g. in tests/custom-bars.html + + if (maxY === null || high > maxY) maxY = high; + if (minY === null || low < minY) minY = low; + } + + return [ minY, maxY ]; +}; + +/** @inheritDoc */ +BarsHandler.prototype.onLineEvaluated = function(points, axis, logscale) { + var point; + for (var j = 0; j < points.length; j++) { + // Copy over the error terms + point = points[j]; + point.y_top = DygraphLayout.calcYNormal_(axis, point.yval_minus, logscale); + point.y_bottom = DygraphLayout.calcYNormal_(axis, point.yval_plus, logscale); + } +}; + +})(); +/** + * @license + * Copyright 2013 David Eberlein (david.eberlein@ch.sauter-bc.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview DataHandler implementation for the custom bars option. + * @author David Eberlein (david.eberlein@ch.sauter-bc.com) + */ + +(function() { + +/*global Dygraph:false */ +"use strict"; + +/** + * @constructor + * @extends Dygraph.DataHandlers.BarsHandler + */ +Dygraph.DataHandlers.CustomBarsHandler = function() { +}; + +var CustomBarsHandler = Dygraph.DataHandlers.CustomBarsHandler; +CustomBarsHandler.prototype = new Dygraph.DataHandlers.BarsHandler(); + +/** @inheritDoc */ +CustomBarsHandler.prototype.extractSeries = function(rawData, i, options) { + // TODO(danvk): pre-allocate series here. + var series = []; + var x, y, point; + var logScale = options.get('logscale'); + for ( var j = 0; j < rawData.length; j++) { + x = rawData[j][0]; + point = rawData[j][i]; + if (logScale && point !== null) { + // On the log scale, points less than zero do not exist. + // This will create a gap in the chart. + if (point[0] <= 0 || point[1] <= 0 || point[2] <= 0) { + point = null; + } + } + // Extract to the unified data format. + if (point !== null) { + y = point[1]; + if (y !== null && !isNaN(y)) { + series.push([ x, y, [ point[0], point[2] ] ]); + } else { + series.push([ x, y, [ y, y ] ]); + } + } else { + series.push([ x, null, [ null, null ] ]); + } + } + return series; +}; + +/** @inheritDoc */ +CustomBarsHandler.prototype.rollingAverage = + function(originalData, rollPeriod, options) { + rollPeriod = Math.min(rollPeriod, originalData.length); + var rollingData = []; + var y, low, high, mid,count, i, extremes; + + low = 0; + mid = 0; + high = 0; + count = 0; + for (i = 0; i < originalData.length; i++) { + y = originalData[i][1]; + extremes = originalData[i][2]; + rollingData[i] = originalData[i]; + + if (y !== null && !isNaN(y)) { + low += extremes[0]; + mid += y; + high += extremes[1]; + count += 1; + } + if (i - rollPeriod >= 0) { + var prev = originalData[i - rollPeriod]; + if (prev[1] !== null && !isNaN(prev[1])) { + low -= prev[2][0]; + mid -= prev[1]; + high -= prev[2][1]; + count -= 1; + } + } + if (count) { + rollingData[i] = [ + originalData[i][0], + 1.0 * mid / count, + [ 1.0 * low / count, + 1.0 * high / count ] ]; + } else { + rollingData[i] = [ originalData[i][0], null, [ null, null ] ]; + } + } + + return rollingData; +}; + +})(); +/** + * @license + * Copyright 2013 David Eberlein (david.eberlein@ch.sauter-bc.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview DataHandler implementation for the error bars option. + * @author David Eberlein (david.eberlein@ch.sauter-bc.com) + */ + +(function() { + +/*global Dygraph:false */ +"use strict"; + +/** + * @constructor + * @extends Dygraph.DataHandlers.BarsHandler + */ +Dygraph.DataHandlers.ErrorBarsHandler = function() { +}; + +var ErrorBarsHandler = Dygraph.DataHandlers.ErrorBarsHandler; +ErrorBarsHandler.prototype = new Dygraph.DataHandlers.BarsHandler(); + +/** @inheritDoc */ +ErrorBarsHandler.prototype.extractSeries = function(rawData, i, options) { + // TODO(danvk): pre-allocate series here. + var series = []; + var x, y, variance, point; + var sigma = options.get("sigma"); + var logScale = options.get('logscale'); + for ( var j = 0; j < rawData.length; j++) { + x = rawData[j][0]; + point = rawData[j][i]; + if (logScale && point !== null) { + // On the log scale, points less than zero do not exist. + // This will create a gap in the chart. + if (point[0] <= 0 || point[0] - sigma * point[1] <= 0) { + point = null; + } + } + // Extract to the unified data format. + if (point !== null) { + y = point[0]; + if (y !== null && !isNaN(y)) { + variance = sigma * point[1]; + // preserve original error value in extras for further + // filtering + series.push([ x, y, [ y - variance, y + variance, point[1] ] ]); + } else { + series.push([ x, y, [ y, y, y ] ]); + } + } else { + series.push([ x, null, [ null, null, null ] ]); + } + } + return series; +}; + +/** @inheritDoc */ +ErrorBarsHandler.prototype.rollingAverage = + function(originalData, rollPeriod, options) { + rollPeriod = Math.min(rollPeriod, originalData.length); + var rollingData = []; + var sigma = options.get("sigma"); + + var i, j, y, v, sum, num_ok, stddev, variance, value; + + // Calculate the rolling average for the first rollPeriod - 1 points + // where there is not enough data to roll over the full number of points + for (i = 0; i < originalData.length; i++) { + sum = 0; + variance = 0; + num_ok = 0; + for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { + y = originalData[j][1]; + if (y === null || isNaN(y)) + continue; + num_ok++; + sum += y; + variance += Math.pow(originalData[j][2][2], 2); + } + if (num_ok) { + stddev = Math.sqrt(variance) / num_ok; + value = sum / num_ok; + rollingData[i] = [ originalData[i][0], value, + [value - sigma * stddev, value + sigma * stddev] ]; + } else { + // This explicitly preserves NaNs to aid with "independent + // series". + // See testRollingAveragePreservesNaNs. + v = (rollPeriod == 1) ? originalData[i][1] : null; + rollingData[i] = [ originalData[i][0], v, [ v, v ] ]; + } + } + + return rollingData; +}; + +})(); +/** + * @license + * Copyright 2013 David Eberlein (david.eberlein@ch.sauter-bc.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ + +/** + * @fileoverview DataHandler implementation for the combination + * of error bars and fractions options. + * @author David Eberlein (david.eberlein@ch.sauter-bc.com) + */ + +(function() { + +/*global Dygraph:false */ +"use strict"; + +/** + * @constructor + * @extends Dygraph.DataHandlers.BarsHandler + */ +Dygraph.DataHandlers.FractionsBarsHandler = function() { +}; + +var FractionsBarsHandler = Dygraph.DataHandlers.FractionsBarsHandler; +FractionsBarsHandler.prototype = new Dygraph.DataHandlers.BarsHandler(); + +/** @inheritDoc */ +FractionsBarsHandler.prototype.extractSeries = function(rawData, i, options) { + // TODO(danvk): pre-allocate series here. + var series = []; + var x, y, point, num, den, value, stddev, variance; + var mult = 100.0; + var sigma = options.get("sigma"); + var logScale = options.get('logscale'); + for ( var j = 0; j < rawData.length; j++) { + x = rawData[j][0]; + point = rawData[j][i]; + if (logScale && point !== null) { + // On the log scale, points less than zero do not exist. + // This will create a gap in the chart. + if (point[0] <= 0 || point[1] <= 0) { + point = null; + } + } + // Extract to the unified data format. + if (point !== null) { + num = point[0]; + den = point[1]; + if (num !== null && !isNaN(num)) { + value = den ? num / den : 0.0; + stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; + variance = mult * stddev; + y = mult * value; + // preserve original values in extras for further filtering + series.push([ x, y, [ y - variance, y + variance, num, den ] ]); + } else { + series.push([ x, num, [ num, num, num, den ] ]); + } + } else { + series.push([ x, null, [ null, null, null, null ] ]); + } + } + return series; +}; + +/** @inheritDoc */ +FractionsBarsHandler.prototype.rollingAverage = + function(originalData, rollPeriod, options) { + rollPeriod = Math.min(rollPeriod, originalData.length); + var rollingData = []; + var sigma = options.get("sigma"); + var wilsonInterval = options.get("wilsonInterval"); + + var low, high, i, stddev; + var num = 0; + var den = 0; // numerator/denominator + var mult = 100.0; + for (i = 0; i < originalData.length; i++) { + num += originalData[i][2][2]; + den += originalData[i][2][3]; + if (i - rollPeriod >= 0) { + num -= originalData[i - rollPeriod][2][2]; + den -= originalData[i - rollPeriod][2][3]; + } + + var date = originalData[i][0]; + var value = den ? num / den : 0.0; + if (wilsonInterval) { + // For more details on this confidence interval, see: + // http://en.wikipedia.org/wiki/Binomial_confidence_interval + if (den) { + var p = value < 0 ? 0 : value, n = den; + var pm = sigma * Math.sqrt(p * (1 - p) / n + sigma * sigma / (4 * n * n)); + var denom = 1 + sigma * sigma / den; + low = (p + sigma * sigma / (2 * den) - pm) / denom; + high = (p + sigma * sigma / (2 * den) + pm) / denom; + rollingData[i] = [ date, p * mult, + [ low * mult, high * mult ] ]; + } else { + rollingData[i] = [ date, 0, [ 0, 0 ] ]; + } + } else { + stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; + rollingData[i] = [ date, mult * value, + [ mult * (value - stddev), mult * (value + stddev) ] ]; + } + } + + return rollingData; +}; + +})(); |