[Sommaire] [Imprimer]

   1  <?php
   2  
   3  /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
   4  
   5  /**
   6   * Image_Graph - PEAR PHP OO Graph Rendering Utility.
   7   *
   8   * PHP versions 4 and 5
   9   *
  10   * LICENSE: This library is free software; you can redistribute it and/or modify
  11   * it under the terms of the GNU Lesser General Public License as published by
  12   * the Free Software Foundation; either version 2.1 of the License, or (at your
  13   * option) any later version. This library is distributed in the hope that it
  14   * will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  15   * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
  16   * General Public License for more details. You should have received a copy of
  17   * the GNU Lesser General Public License along with this library; if not, write
  18   * to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19   * 02111-1307 USA
  20   *
  21   * @category   Images
  22   * @package    Image_Graph
  23   * @subpackage Grid
  24   * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
  25   * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
  26   * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
  27   * @version    CVS: $Id: Polar.php,v 1.10 2005/08/24 20:36:04 nosey Exp $
  28   * @link       http://pear.php.net/package/Image_Graph
  29   * @since      File available since Release 0.3.0dev2
  30   */
  31  
  32  /**
  33   * Include file Image/Graph/Grid.php
  34   */
  35  require_once  'Image/Graph/Grid.php';
  36  
  37  /**
  38   * Display a line grid on the plotarea.
  39   *
  40   * {@link Image_Graph_Grid}
  41   *
  42   * @category   Images
  43   * @package    Image_Graph
  44   * @subpackage Grid
  45   * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
  46   * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
  47   * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
  48   * @version    Release: 0.7.2
  49   * @link       http://pear.php.net/package/Image_Graph
  50   * @since      Class available since Release 0.3.0dev2
  51   */
  52  class Image_Graph_Grid_Polar extends Image_Graph_Grid
  53  {
  54  
  55      /**
  56       * GridLines [Constructor]
  57       */
  58      function Image_Graph_Grid_Polar()
  59      {
  60          parent::Image_Graph_Grid();
  61          $this->_lineStyle = 'lightgrey';
  62      }
  63  
  64      /**
  65       * Output the grid
  66       *
  67       * @return bool Was the output 'good' (true) or 'bad' (false).
  68       * @access private
  69       */
  70      function _done()
  71      {
  72          if (parent::_done() === false) {
  73              return false;
  74          }
  75  
  76          if (!$this->_primaryAxis) {
  77              return false;
  78          }
  79  
  80          $this->_canvas->startGroup(get_class($this));
  81          
  82          $value = false;
  83  
  84          $p0 = array ('X' => '#min#', 'Y' => '#min#');
  85          if ($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_Y) {
  86              $p1 = array ('X' => '#min#', 'Y' => '#max#');
  87              $r0 = abs($this->_pointY($p1) - $this->_pointY($p0));
  88          } else {
  89              $p1 = array ('X' => '#max#', 'Y' => '#min#');
  90              $r0 = abs($this->_pointX($p1) - $this->_pointX($p0));
  91          }
  92  
  93          $cx = $this->_pointX($p0);
  94          $cy = $this->_pointY($p0);
  95  
  96          $span = $this->_primaryAxis->_axisSpan;
  97  
  98          while (($value = $this->_primaryAxis->_getNextLabel($value)) !== false) {
  99              $r = $r0 * ($value - $this->_primaryAxis->_getMinimum()) / $span;
 100  
 101              $this->_getLineStyle();
 102              $this->_canvas->ellipse(array('x' => $cx, 'y' => $cy, 'rx' => $r, 'ry' => $r));
 103          }
 104          
 105          $this->_canvas->endGroup();
 106          
 107          return true;
 108      }
 109  
 110  }
 111  ?>