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<?php
/* Icinga Web 2 | (c) 2013 Icinga Development Team | GPLv2+ */
namespace Icinga\Chart\Graph;
use DOMElement;
use Icinga\Chart\Primitive\Drawable;
use Icinga\Chart\Primitive\Path;
use Icinga\Chart\Primitive\Circle;
use Icinga\Chart\Primitive\Styleable;
use Icinga\Chart\Render\RenderContext;
/**
* LineGraph implementation for drawing a set of datapoints as
* a connected path
*/
class LineGraph extends Styleable implements Drawable
{
/**
* The dataset to use
*
* @var array
*/
private $dataset;
/**
* True to show dots for each datapoint
*
* @var bool
*/
private $showDataPoints = false;
/**
* When true, the path will be discrete, i.e. showing hard steps instead of a direct line
*
* @var bool
*/
private $isDiscrete = false;
/**
* The tooltips
*
* @var
*/
private $tooltips;
/** @var array */
private $graphs;
/** @var int */
private $order;
/**
* The default stroke width
* @var int
*/
public $strokeWidth = 5;
/**
* The size of the displayed dots
*
* @var int
*/
public $dotWith = 0;
/**
* Create a new LineGraph displaying the given dataset
*
* @param array $dataset An array of [x, y] arrays to display
*/
public function __construct(
array $dataset,
array &$graphs,
$order,
array $tooltips = null
) {
usort($dataset, array($this, 'sortByX'));
$this->dataset = $dataset;
$this->graphs = $graphs;
$this->tooltips = $tooltips;
$ts = [];
foreach ($this->tooltips as $value) {
$ts[] = $value;
}
$this->tooltips = $ts;
$this->order = $order;
}
/**
* Set datapoints to be emphased via dots
*
* @param bool $bool True to enable datapoints, otherwise false
*/
public function setShowDataPoints($bool)
{
$this->showDataPoints = $bool;
}
/**
* Sort the daset by the xaxis
*
* @param array $v1
* @param array $v2
* @return int
*/
private function sortByX(array $v1, array $v2)
{
if ($v1[0] === $v2[0]) {
return 0;
}
return ($v1[0] < $v2[0]) ? -1 : 1;
}
/**
* Configure this style
*
* @param array $cfg The configuration as given in the drawLine call
*/
public function setStyleFromConfig(array $cfg)
{
$fill = false;
foreach ($cfg as $elem => $value) {
if ($elem === 'color') {
$this->setStrokeColor($value);
} elseif ($elem === 'width') {
$this->setStrokeWidth($value);
} elseif ($elem === 'showPoints') {
$this->setShowDataPoints($value);
} elseif ($elem === 'fill') {
$fill = $value;
} elseif ($elem === 'discrete') {
$this->isDiscrete = true;
}
}
if ($fill) {
$this->setFill($this->strokeColor);
$this->setStrokeColor('black');
}
}
/**
* Render this BarChart
*
* @param RenderContext $ctx The rendering context to use for drawing
*
* @return DOMElement $dom Element
*/
public function toSvg(RenderContext $ctx)
{
$path = new Path($this->dataset);
if ($this->isDiscrete) {
$path->setDiscrete(true);
}
$path->setStrokeColor($this->strokeColor);
$path->setStrokeWidth($this->strokeWidth);
$path->setAttribute('data-icinga-graph-type', 'line');
if ($this->fill !== 'none') {
$firstX = $this->dataset[0][0];
$lastX = $this->dataset[count($this->dataset)-1][0];
$path->prepend(array($firstX, 100))
->append(array($lastX, 100));
$path->setFill($this->fill);
}
$path->setAdditionalStyle(['clip-path' => 'url(#clip)']);
$path->setId($this->id ?? uniqid('line-graph-'));
$group = $path->toSvg($ctx);
foreach ($this->dataset as $x => $point) {
if ($this->showDataPoints === true) {
$dot = new Circle($point[0], $point[1], $this->dotWith);
$dot->setFill($this->strokeColor);
$group->appendChild($dot->toSvg($ctx));
}
// Draw invisible circle for tooltip hovering
if (isset($this->tooltips[$x])) {
$invisible = new Circle($point[0], $point[1], 20);
$invisible->setFill($this->strokeColor);
$invisible->setAdditionalStyle(['opacity' => '0.0']);
$data = array(
'label' => isset($this->graphs[$this->order]['label']) ?
strtolower($this->graphs[$this->order]['label']) : '',
'color' => isset($this->graphs[$this->order]['color']) ?
strtolower($this->graphs[$this->order]['color']) : '#fff'
);
$format = isset($this->graphs[$this->order]['tooltip'])
? $this->graphs[$this->order]['tooltip'] : null;
$title = $ctx->getDocument()->createElement('title');
$title->textContent = $this->tooltips[$x]->renderNoHtml($this->order, $data, $format);
$invisibleRendered = $invisible->toSvg($ctx);
$invisibleRendered->appendChild($title);
$group->appendChild($invisibleRendered);
}
}
return $group;
}
}
|
