GraphPie.php

   1 <?php
   2 /*=====================================================================*\
   3 || ###################################################################
   4 || # Blue Static ISSO Framework
   5 || # Copyright (c)2002-2007 Blue Static
   6 || #
   7 || # This program is free software; you can redistribute it and/or modify
   8 || # it under the terms of the GNU General Public License as published by
   9 || # the Free Software Foundation; version 2 of the License.
  10 || #
  11 || # This program is distributed in the hope that it will be useful, but
  12 || # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13 || # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  14 || # more details.
  15 || #
  16 || # You should have received a copy of the GNU General Public License along
  17 || # with this program; if not, write to the Free Software Foundation, Inc.,
  18 || # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19 || ###################################################################
  20 \*=====================================================================*/
  21
  22 /**
  23 * Graphing System: Pie Chart (GraphPie.php)
  24 *
  25 * @package      ISSO
  26 */
  27
  28 require_once('ISSO/Graph.php');
  29
  30 /**
  31 * Graphing System: Pie Chart
  32 *
  33 * This framework creates pie charts as PNG image strings. Simply add to
  34 * the data set and graph to get the byte stream returned.
  35 *
  36 * @author               Blue Static
  37 * @copyright    Copyright (c)2002 - 2007, Blue Static
  38 * @package              ISSO
  39 *
  40 */
  41 class BSGraphPie extends BSGraph
  42 {
  43         /**
  44         * Graphing data set; 2D array of
  45         * array(NAME, PERCENT, COLOR)
  46         * @var  array
  47         */
  48         protected $dataset = array();
  49
  50         // ###################################################################
  51         /**
  52         * Graphs the actual graph and returns a byte stream
  53         *
  54         * @return       string  Byte stream
  55         */
  56         public function graph()
  57         {
  58                 $colors = $this->_primeColors();
  59
  60                 $diameter = $this->dimensions['height'] - (5 * self::PADDING);
  61                 $radius = $diameter / 2;
  62                 $graphstart = self::PADDING + imagefontheight(5) + self::PADDING;
  63                 $legendbox = 10;
  64
  65                 $this->_paintCanvas();
  66
  67                 $center = array(
  68                         'x' => ($this->legend ? ($radius + self::PADDING) : ($this->dimensions['width'] / 2)),
  69                         'y' => ($this->dimensions['height'] / 2) + self::PADDING
  70                 );
  71
  72                 $legx = (2 * self::PADDING) + $diameter;
  73
  74                 $lastdeg = 0;
  75                 $boxoffset = 0;
  76                 foreach ($this->dataset AS $plot)
  77                 {
  78                         $deg = (360 / 100) * $plot[1];
  79                         imagefilledarc($this->image, $center['x'], $center['y'], $diameter, $diameter, $lastdeg, $deg + $lastdeg, $plot[2], IMG_ARC_PIE);
  80                         imagefilledarc($this->image, $center['x'], $center['y'], $diameter, $diameter, $lastdeg, $deg + $lastdeg, $colors['grey'], IMG_ARC_EDGED | IMG_ARC_NOFILL);
  81                         $lastdeg += $deg;
  82
  83                         if ($this->legend)
  84                         {
  85                                 $box = array(
  86                                         $legx + 1 + self::SPACING,                              $graphstart + 1 + self::SPACING + $boxoffset, // top left
  87                                         $legx + 1 + self::SPACING,                              $graphstart + 1 + self::SPACING + $boxoffset + $legendbox, // bottom left
  88                                         $legx + 1 + self::SPACING + $legendbox, $graphstart + 1 + self::SPACING + $boxoffset + $legendbox, // bottom right
  89                                         $legx + 1 + self::SPACING + $legendbox, $graphstart + 1 + self::SPACING + $boxoffset // top right
  90                                 );
  91                                 imagefilledpolygon($this->image, $box, 4, $plot[2]);
  92
  93                                 imagestring($this->image, 2, ($legx + 1 + self::SPACING + $legendbox + self::SPACING), ($graphstart + self::SPACING + $boxoffset), $plot[0] . " ($plot[1]%)", $colors['black']);
  94
  95                                 $boxoffset += self::SPACING + $legendbox;
  96                         }
  97                 }
  98
  99                 // draw the ellipse (do here so it cleans up the arc edges)
 100                 imageellipse($this->image, $center['x'], $center['y'], $diameter, $diameter, $colors['grey']);
 101
 102                 // do the legend
 103                 if ($this->legend)
 104                 {
 105                         imageline($this->image, $legx, $graphstart, $this->dimensions['width'] - self::PADDING, $graphstart, $colors['black']); // top
 106                         imageline($this->image, $legx, $graphstart, $legx, $legy = ($graphstart + self::SPACING + $boxoffset + 1), $colors['black']); // left
 107                         imageline($this->image, $legx, $legy, $this->dimensions['width'] - self::PADDING, $legy, $colors['black']); // bottom
 108                         imageline($this->image, $this->dimensions['width'] - self::PADDING, $graphstart, $this->dimensions['width'] - self::PADDING, $legy, $colors['black']); // right
 109                 }
 110
 111                 return $this->_imageFlush();
 112         }
 113
 114         // ###################################################################
 115         /**
 116         * Adds an entry to the data set without specifying a color to add.
 117         * This is the standard method as the color should only be overridden
 118         * if necessary.
 119         *
 120         * @param        string  Data column name
 121         * @param        integer Percentage of 100
 122         */
 123         public function addDataSet($name, $percent)
 124         {
 125                 $this->dataset[] = array($name, $percent, $this->_fetchColor());
 126         }
 127
 128         // ###################################################################
 129         /**
 130         * Adds an entry ot the data set with specifying a color. This works
 131         * the same as addDataSet() but requires an array() as the 3rd parameter
 132         * of R,G,B values
 133         *
 134         * @param        string  Data column name
 135         * @param        integer Percent of 100
 136         * @param        array   Array of R,G,B values
 137         */
 138         public function addDataSetColor($name, $percent, $color)
 139         {
 140                 $this->dataset[] = array($name, $percent, imagecolorallocate($this->image, $color[0], $color[1], $color[2]));
 141         }
 142 }
 143
 144 ?>