1 files changed, 163 insertions, 0 deletions
diff --git a/library/Icinga/Chart/Graph/BarGraph.php b/library/Icinga/Chart/Graph/BarGraph.php
new file mode 100644
index 0000000..be142bf
--- /dev/null
+++ b/library/Icinga/Chart/Graph/BarGraph.php
@@ -0,0 +1,163 @@
+<?php
+/* Icinga Web 2 | (c) 2013 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Chart\Graph;
+
+use DOMElement;
+use Icinga\Chart\Primitive\Animation;
+use Icinga\Chart\Primitive\Drawable;
+use Icinga\Chart\Primitive\Rect;
+use Icinga\Chart\Primitive\Styleable;
+use Icinga\Chart\Render\RenderContext;
+
+/**
+ * Bar graph implementation
+ */
+class BarGraph extends Styleable implements Drawable
+{
+    /**
+     * The dataset order
+     *
+     * @var int
+     */
+    private $order = 0;
+
+    /**
+     * The width of the bars.
+     *
+     * @var int
+     */
+    private $barWidth = 3;
+
+    /**
+     * The dataset to use for this bar graph
+     *
+     * @var array
+     */
+    private $dataSet;
+
+    /**
+     * The tooltips
+     *
+     * @var
+     */
+    private $tooltips;
+
+    /**
+     * All graphs
+     *
+     * @var
+     */
+    private $graphs;
+
+    /**
+     * Create a new BarGraph with the given dataset
+     *
+     * @param array $dataSet    An array of data points
+     * @param int   $order      The graph number displayed by this BarGraph
+     * @param array $tooltips   The tooltips to display for each value
+     */
+    public function __construct(
+        array $dataSet,
+        array &$graphs,
+        $order,
+        array $tooltips = null
+    ) {
+        $this->order = $order;
+        $this->dataSet = $dataSet;
+
+        $this->tooltips = $tooltips;
+        $ts = [];
+        foreach ($this->tooltips as $value) {
+            $ts[] = $value;
+        }
+        $this->tooltips = $ts;
+
+        $this->graphs = $graphs;
+    }
+
+    /**
+     * Apply configuration styles from the $cfg
+     *
+     * @param array $cfg        The configuration as given in the drawBars call
+     */
+    public function setStyleFromConfig(array $cfg)
+    {
+        foreach ($cfg as $elem => $value) {
+            if ($elem === 'color') {
+                $this->setFill($value);
+            } elseif ($elem === 'width') {
+                $this->setStrokeWidth($value);
+            }
+        }
+    }
+
+    /**
+     * Draw a single rectangle
+     *
+     * @param array     $point          The
+     * @param string    $fill           The fill color to use
+     * @param           $strokeWidth
+     * @param ?int      $index
+     *
+     * @return Rect
+     */
+    private function drawSingleBar($point, $fill, $strokeWidth, $index = null)
+    {
+        $rect = new Rect($point[0] - ($this->barWidth / 2), $point[1], $this->barWidth, 100 - $point[1]);
+        $rect->setFill($fill);
+        $rect->setStrokeWidth($strokeWidth);
+        $rect->setStrokeColor('black');
+        if (isset($index)) {
+            $rect->setAttribute('data-icinga-graph-index', $index);
+        }
+        $rect->setAttribute('data-icinga-graph-type', 'bar');
+        $rect->setAdditionalStyle(['clip-path' => 'url(#clip)']);
+        return $rect;
+    }
+
+    /**
+     * Render this BarChart
+     *
+     * @param   RenderContext   $ctx    The rendering context to use for drawing
+     *
+     * @return  DOMElement      $dom    Element
+     */
+    public function toSvg(RenderContext $ctx)
+    {
+        $doc = $ctx->getDocument();
+        $group = $doc->createElement('g');
+        $idx = 0;
+
+        if (count($this->dataSet) > 15) {
+            $this->barWidth = 2;
+        }
+        if (count($this->dataSet) > 25) {
+            $this->barWidth = 1;
+        }
+
+        foreach ($this->dataSet as $x => $point) {
+            // add white background bar, to prevent other bars from altering transparency effects
+            $bar = $this->drawSingleBar($point, 'white', $this->strokeWidth, $idx++)->toSvg($ctx);
+            $group->appendChild($bar);
+
+            // draw actual bar
+            $bar = $this->drawSingleBar($point, $this->fill, $this->strokeWidth)->toSvg($ctx);
+            if (isset($this->tooltips[$x])) {
+                $data = array(
+                    'label' => isset($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);
+                $bar->appendChild($title);
+            }
+            $group->appendChild($bar);
+        }
+        return $group;
+    }
+}