/**
* Render the legend to an SVG object
*
* @param RenderContext $ctx The context to use for rendering this legend
*
* @return DOMElement The SVG representation of this legend
*/
public function toSvg(RenderContext $ctx)
{
$outer = new Canvas('legend', new LayoutBox(0, 0, 100, 100));
$outer->getLayout()->setPadding(2, 2, 2, 2);
$nrOfColumns = 4;
$topstep = 10 / $nrOfColumns + 2;
$top = 0;
$left = 0;
$lastLabelEndPos = -1;
foreach ($this->dataset as $color => $text) {
$leftstep = 100 / $nrOfColumns + strlen($text);
// Make sure labels don't overlap each other
while ($lastLabelEndPos >= $left) {
$left += $leftstep;
}
// When a label is longer than the available space, use the next line
if ($left + strlen($text) > 100) {
$top += $topstep;
$left = 0;
}
$colorBox = new Rect($left, $top, 2, 2);
$colorBox->setFill($color)->setStrokeWidth(2);
$colorBox->keepRatio();
$outer->addElement($colorBox);
$textBox = new Text($left + 5, $top + 2, $text);
$textBox->setFontSize('2em');
$outer->addElement($textBox);
// readjust layout
$lastLabelEndPos = $left + strlen($text);
$left += $leftstep;
}
$svg = $outer->toSvg($ctx);
return $svg;
}
/**
* Draw a single rectangle
*
* @param array $point The
* @param null $index
* @param string $fill The fill color to use
* @param $strokeWidth
*
* @return Rect
*/
private function drawSingleBar($point, $index = null, $fill, $strokeWidth)
{
$rect = new Rect($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');
$idx = 0;
foreach ($this->dataSet as $point) {
$rect = new Rect($point[0] - 1, $point[1], $this->barWidth, 100 - $point[1]);
$rect->setFill($this->fill);
$rect->setStrokeWidth($this->strokeWidth);
$rect->setStrokeColor('black');
$rect->setAttribute('data-icinga-graph-index', $idx++);
$rect->setAttribute('data-icinga-graph-type', 'bar');
$rect->setAdditionalStyle('clip-path: url(#clip);');
/*$rect->setAnimation(
new Animation(
'y',
$ctx->yToAbsolute(100),
$ctx->yToAbsolute($point[1]),
rand(1, 1.5)/2
)
);*/
$group->appendChild($rect->toSvg($ctx));
}
return $group;
}