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109 lines
2.6 KiB
109 lines
2.6 KiB
<?php
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// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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//
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// All Rights Reserved. See copyright.txt for details and a complete list of authors.
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// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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// $Id$
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require_once 'lib/graph-engine/core.php';
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/**
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* PieChartGraphic
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*
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* @uses Graphic
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*/
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class PieChartGraphic extends Graphic
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{
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public $pie_data;
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public function __construct()
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{
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parent::__construct();
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$this->pie_data = [];
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}
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public function getRequiredSeries()
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{
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return [
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'label' => false,
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'value' => true,
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'color' => false,
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'style' => false
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];
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}
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public function _handleData($data)
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{
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$elements = count($data['value']);
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if (! isset($data['color'])) {
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$data['color'] = [];
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for ($i = 0; $elements > $i; ++$i) {
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$data['color'][] = $this->_getColor();
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}
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}
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if (! isset($data['style'])) {
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for ($i = 0; $elements > $i; ++$i) {
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$data['style'][] = 'FillStroke-' . $data['color'][$i];
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}
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}
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if (isset($data['label'])) {
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foreach ($data['label'] as $key => $label) {
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$this->addLegend($data['color'][$key], $label);
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}
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}
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$total = array_sum($data['value']);
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foreach ($data['value'] as $key => $value) {
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if (is_numeric($value)) {
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$this->pie_data[] = [$data['style'][$key], $value / $total * 360];
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}
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}
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return true;
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}
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public function _drawContent(&$renderer)
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{
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$layout = $this->_layout();
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$centerX = $layout['pie-center-x'];
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$centerY = $layout['pie-center-y'];
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$radius = $layout['pie-radius'];
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$base = 0;
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foreach ($this->pie_data as $info) {
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list($style, $degree) = $info;
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$renderer->drawPie(
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$centerX,
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$centerY,
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$radius,
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$base,
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$base + $degree,
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$renderer->getStyle($style)
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);
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$base += $degree;
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}
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}
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public function _drawLegendBox(&$renderer, $color)
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{
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$renderer->drawRectangle(0, 0, 1, 1, $renderer->getStyle("FillStroke-$color"));
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}
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public function _default()
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{
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return array_merge(
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parent::_default(),
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[
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'pie-center-x' => 0.5,
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'pie-center-y' => 0.5,
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'pie-radius' => 0.4
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]
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);
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}
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}
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