libraries/chart/pma_pchart_multi_radar.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * @package phpMyAdmin
   5  */
   6
   7 /**
   8  *
   9  */
  10 require_once 'pma_pchart_multi.php';
  11
  12 /**
  13  * implements multi radar chart
  14  * @package phpMyAdmin
  15  */
  16 class PMA_pChart_multi_radar extends PMA_pChart_multi
  17 {
  18     public function __construct($data, $options = null)
  19     {
  20         parent::__construct($data, $options);
  21
  22         $this->normalizeValues();
  23     }
  24
  25     /**
  26      * Get the largest value from the data and normalize all the other values.
  27      */
  28     private function normalizeValues()
  29     {
  30         $maxValue = 0;
  31         $keys = array_keys($this->data);
  32         $valueKey = $keys[1];
  33
  34         // get the max value
  35         foreach ($this->data[$valueKey] as $values) {
  36             if (max($values) > $maxValue) {
  37                 $maxValue = max($values);
  38             }
  39         }
  40
  41         // normalize all the values according to the max value
  42         foreach ($this->data[$valueKey] as &$values) {
  43             foreach ($values as &$value) {
  44                 $value = $value / $maxValue * 10;
  45             }
  46         }
  47     }
  48
  49     /**
  50      * graph area for the radar chart does not include grid lines
  51      */
  52     protected function drawGraphArea()
  53     {
  54         $this->chart->drawGraphArea(
  55                 $this->getGraphAreaColor(RED),
  56                 $this->getGraphAreaColor(GREEN),
  57                 $this->getGraphAreaColor(BLUE),
  58                 FALSE
  59         );
  60         $this->chart->drawGraphAreaGradient(
  61                 $this->getGraphAreaGradientColor(RED),
  62                 $this->getGraphAreaGradientColor(GREEN),
  63                 $this->getGraphAreaGradientColor(BLUE),
  64                 50
  65         );
  66     }
  67
  68     /**
  69      * draw multi radar chart
  70      */
  71     protected function drawChart()
  72     {
  73         parent::drawChart();
  74
  75         // when drawing radar graph we can specify the border from the top of
  76         // graph area. We want border to be dynamic, so that either the top
  77         // or the side of the radar is some distance away from the top or the
  78         // side of the graph area.
  79         $areaWidth = $this->chart->GArea_X2 - $this->chart->GArea_X1;
  80         $areaHeight = $this->chart->GArea_Y2 - $this->chart->GArea_Y1;
  81
  82         if ($areaHeight > $areaWidth) {
  83             $borderOffset = ($areaHeight - $areaWidth) / 2;
  84         }
  85         else {
  86             $borderOffset = 0;
  87         }
  88
  89         // the least ammount that radar is away from the graph area side.
  90         $borderOffset += 40;
  91
  92         // Draw the radar chart
  93         $this->chart->drawRadarAxis($this->dataSet->GetData(), $this->dataSet->GetDataDescription(), TRUE, $borderOffset,
  94             120, 120, 120, 230, 230, 230, -1, 2);
  95         $this->chart->drawFilledRadar($this->dataSet->GetData(), $this->dataSet->GetDataDescription(), 50, $borderOffset);
  96     }
  97 }
  98
  99 ?>