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<?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;
}
}
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