150 lines
3.8 KiB
PHP
150 lines
3.8 KiB
PHP
<?php
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// {{{ICINGA_LICENSE_HEADER}}}
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// {{{ICINGA_LICENSE_HEADER}}}
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namespace Icinga\Chart\Graph;
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use DOMElement;
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use Icinga\Chart\Primitive\Drawable;
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use Icinga\Chart\Primitive\Path;
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use Icinga\Chart\Primitive\Circle;
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use Icinga\Chart\Primitive\Styleable;
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use Icinga\Chart\Render\RenderContext;
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/**
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* LineGraph implementation for drawing a set of datapoints as
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* a connected path
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*/
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class LineGraph extends Styleable implements Drawable
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{
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/**
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* The dataset to use
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*
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* @var array
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*/
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private $dataset;
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/**
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* True to show dots for each datapoint
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*
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* @var bool
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*/
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private $showDataPoints = false;
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/**
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* When true, the path will be discrete, i.e. showing hard steps instead of a direct line
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*
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* @var bool
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*/
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private $isDiscrete = false;
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/**
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* The default stroke width
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* @var int
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*/
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public $strokeWidth = 5;
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/**
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* Create a new LineGraph displaying the given dataset
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*
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* @param array $dataset An array of [x, y] arrays to display
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*/
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public function __construct(array $dataset)
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{
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usort($dataset, array($this, 'sortByX'));
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$this->dataset = $dataset;
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}
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/**
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* Set datapoints to be emphased via dots
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*
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* @param bool $bool True to enable datapoints, otherwise false
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*/
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public function setShowDataPoints($bool)
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{
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$this->showDataPoints = $bool;
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}
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/**
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* Sort the daset by the xaxis
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*
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* @param array $v1
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* @param array $v2
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* @return int
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*/
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private function sortByX(array $v1, array $v2)
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{
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if ($v1[0] === $v2[0]) {
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return 0;
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}
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return ($v1[0] < $v2[0]) ? -1 : 1;
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}
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/**
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* Configure this style
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*
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* @param array $cfg The configuration as given in the drawLine call
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*/
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public function setStyleFromConfig(array $cfg)
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{
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$fill = false;
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foreach ($cfg as $elem => $value) {
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if ($elem === 'color') {
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$this->setStrokeColor($value);
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} elseif ($elem === 'width') {
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$this->setStrokeWidth($value);
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} elseif ($elem === 'showPoints') {
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$this->setShowDataPoints($value);
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} elseif ($elem === 'fill') {
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$fill = $value;
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} elseif ($elem === 'discrete') {
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$this->isDiscrete = true;
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}
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}
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if ($fill) {
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$this->setFill($this->strokeColor);
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$this->setStrokeColor('black');
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}
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}
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/**
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* Render this BarChart
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*
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* @param RenderContext $ctx The rendering context to use for drawing
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*
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* @return DOMElement $dom Element
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*/
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public function toSvg(RenderContext $ctx)
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{
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$path = new Path($this->dataset);
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if ($this->isDiscrete) {
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$path->setDiscrete(true);
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}
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$path->setStrokeColor($this->strokeColor);
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$path->setStrokeWidth($this->strokeWidth);
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$path->setAttribute('data-icinga-graph-type', 'line');
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if ($this->fill !== 'none') {
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$firstX = $this->dataset[0][0];
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$lastX = $this->dataset[count($this->dataset)-1][0];
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$path->prepend(array($firstX, 100))
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->append(array($lastX, 100));
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$path->setFill($this->fill);
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}
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$path->setAdditionalStyle('clip-path: url(#clip);');
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$path->setId($this->id);
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$group = $path->toSvg($ctx);
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if ($this->showDataPoints === true) {
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foreach ($this->dataset as $point) {
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$dot = new Circle($point[0], $point[1], $this->strokeWidth*5);
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$dot->setFill('black');
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$group->appendChild($dot->toSvg($ctx));
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}
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}
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return $group;
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}
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}
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