154 lines
3.9 KiB
PHP
154 lines
3.9 KiB
PHP
<?php
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define('TOP', 0);
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define('RIGHT', 1);
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define('BOTTOM', 2);
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define('LEFT', 3);
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require_once 'pma_chart.php';
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include "pChart/pData.class";
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include "pChart/pChart.class";
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/*
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* Base class for every chart implemented using pChart.
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*/
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abstract class PMA_pChart_Chart extends PMA_Chart
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{
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protected $titleText;
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protected $data;
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protected $dataSet;
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protected $chart;
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protected $imageEncoded;
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public function __construct($titleText, $data, $options = null)
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{
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parent::__construct($options);
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$this->titleText = $titleText;
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$this->data = $data;
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$this->settings['fontPath'] = './libraries/chart/pChart/fonts/';
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$this->settings['scale'] = SCALE_ADDALLSTART0;
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$this->settings['labelHeight'] = 20;
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// as in CSS (top, right, bottom, left)
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$this->settings['areaMargins'] = array(20, 20, 40, 60);
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// create pChart object
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$this->chart = new pChart($this->getWidth(), $this->getHeight());
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// create pData object
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$this->dataSet = new pData;
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// initialize colors
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foreach ($this->getColors() as $key => $color) {
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$this->chart->setColorPalette(
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$key,
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hexdec(substr($color, 1, 2)),
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hexdec(substr($color, 3, 2)),
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hexdec(substr($color, 5, 2))
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);
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}
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}
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abstract protected function prepareDataSet();
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protected function prepareChart()
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{
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$this->drawBackground();
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$this->drawChart();
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}
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protected function drawBackground()
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{
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$this->drawCommon();
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$this->drawTitle();
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$this->setGraphAreaDimensions();
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$this->drawGraphArea();
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}
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protected function drawCommon()
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{
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$this->chart->setFontProperties($this->getFontPath().'tahoma.ttf', 8);
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$this->chart->drawGraphAreaGradient(132,173,131,50,TARGET_BACKGROUND);
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$this->chart->addBorder(2);
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}
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protected function drawTitle()
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{
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// Draw the title
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$this->chart->drawTextBox(0,0,$this->getWidth(),$this->getLabelHeight(),$this->titleText,0,255,255,255,ALIGN_CENTER,TRUE,0,0,0,30);
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}
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protected function setGraphAreaDimensions()
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{
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$this->chart->setGraphArea(
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$this->getAreaMargin(LEFT),
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$this->getLabelHeight() + $this->getAreaMargin(TOP),
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$this->getWidth() - $this->getAreaMargin(RIGHT),
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$this->getHeight() - $this->getAreaMargin(BOTTOM)
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);
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}
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protected function drawGraphArea()
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{
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$this->chart->drawGraphArea(213,217,221,FALSE);
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$this->chart->drawScale($this->dataSet->GetData(),$this->dataSet->GetDataDescription(),$this->getScale(),213,217,221,TRUE,0,2,TRUE);
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$this->chart->drawGraphAreaGradient(163,203,167,50);
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$this->chart->drawGrid(4,TRUE,230,230,230,20);
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}
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protected abstract function drawChart();
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protected function render()
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{
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ob_start();
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imagepng($this->chart->Picture);
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$output = ob_get_contents();
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ob_end_clean();
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$this->imageEncoded = base64_encode($output);
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}
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public function toString()
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{
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if (function_exists('gd_info')) {
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$this->prepareDataSet();
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$this->prepareChart();
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$this->render();
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return '<img id="pChartPicture1" src="data:image/png;base64,'.$this->imageEncoded.'" />';
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}
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else {
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return 'Missing GD library.';
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}
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}
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protected function getLabelHeight()
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{
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return $this->settings['labelHeight'];
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}
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protected function getAreaMargin($side)
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{
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return $this->settings['areaMargins'][$side];
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}
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protected function getFontPath()
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{
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return $this->settings['fontPath'];
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}
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protected function getScale()
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{
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return $this->settings['scale'];
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}
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}
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?>
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