libraries/chart/pma_pchart_single_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_single.php';
  11
  12 /**
  13  * implements single radar chart
  14  * @package phpMyAdmin
  15  */
  16 class PMA_pChart_single_radar extends PMA_pChart_single
  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[0];
  33         $maxValue = max($this->data[$valueKey]);
  34
  35         foreach ($this->data[$valueKey] as &$value) {
  36             $value = $value / $maxValue * 10;
  37         }
  38     }
  39
  40     /**
  41      * graph area for the radar chart does not include grid lines
  42      */
  43     protected function drawGraphArea()
  44     {
  45         $this->chart->drawGraphArea(
  46                 $this->getGraphAreaColor(RED),
  47                 $this->getGraphAreaColor(GREEN),
  48                 $this->getGraphAreaColor(BLUE),
  49                 FALSE
  50         );
  51         $this->chart->drawGraphAreaGradient(
  52                 $this->getGraphAreaGradientColor(RED),
  53                 $this->getGraphAreaGradientColor(GREEN),
  54                 $this->getGraphAreaGradientColor(BLUE),
  55                 50
  56         );
  57     }
  58
  59     /**
  60      * draws the radar chart
  61      */
  62     protected function drawChart()
  63     {
  64         // when drawing radar graph we can specify the border from the top of
  65         // graph area. We want border to be dynamic, so that either the top
  66         // or the side of the radar is some distance away from the top or the
  67         // side of the graph area.
  68         $areaWidth = $this->chart->GArea_X2 - $this->chart->GArea_X1;
  69         $areaHeight = $this->chart->GArea_Y2 - $this->chart->GArea_Y1;
  70
  71         if ($areaHeight > $areaWidth) {
  72             $borderOffset = ($areaHeight - $areaWidth) / 2;
  73         }
  74         else {
  75             $borderOffset = 0;
  76         }
  77
  78         // the least ammount that radar is away from the graph area side.
  79         $borderOffset += 40;
  80
  81         $this->chart->drawRadarAxis($this->dataSet->GetData(), $this->dataSet->GetDataDescription(),
  82             TRUE, $borderOffset, 120, 120, 120, 230, 230, 230, -1, 2);
  83         $this->chart->drawFilledRadar($this->dataSet->GetData(), $this->dataSet->GetDataDescription(), 50, $borderOffset);
  84     }
  85 }
  86
  87 ?>