[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 Plot
  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: Line.php,v 1.15 2006/03/02 12:37:37 nosey Exp $
  28   * @link       http://pear.php.net/package/Image_Graph
  29   */
  30  
  31  /**
  32   * Include file Image/Graph/Plot.php
  33   */
  34  require_once  'Image/Graph/Plot.php';
  35  
  36  /**
  37   * Linechart.
  38   *
  39   * @category   Images
  40   * @package    Image_Graph
  41   * @subpackage Plot
  42   * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
  43   * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
  44   * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
  45   * @version    Release: 0.7.2
  46   * @link       http://pear.php.net/package/Image_Graph
  47   */
  48  class Image_Graph_Plot_Line extends Image_Graph_Plot
  49  {
  50  
  51      /**
  52       * Gets the fill style of the element
  53       *
  54       * @return int A GD filestyle representing the fill style
  55       * @see Image_Graph_Fill
  56       * @access private
  57       */
  58      function _getFillStyle($ID = false)
  59      {
  60          return IMG_COLOR_TRANSPARENT;
  61      }
  62  
  63      /**
  64       * Perform the actual drawing on the legend.
  65       *
  66       * @param int $x0 The top-left x-coordinate
  67       * @param int $y0 The top-left y-coordinate
  68       * @param int $x1 The bottom-right x-coordinate
  69       * @param int $y1 The bottom-right y-coordinate
  70       * @access private
  71       */
  72      function _drawLegendSample($x0, $y0, $x1, $y1)
  73      {
  74          $y = ($y0 + $y1) / 2;
  75          $dx = abs($x1 - $x0) / 3;
  76          $dy = abs($y1 - $y0) / 5;
  77          $this->_canvas->addVertex(array('x' => $x0, 'y' => $y));
  78          $this->_canvas->addVertex(array('x' => $x0 + $dx, 'y' => $y - $dy * 2));
  79          $this->_canvas->addVertex(array('x' => $x1 - $dx, 'y' => $y + $dy));
  80          $this->_canvas->addVertex(array('x' => $x1, 'y' => $y - $dy));
  81          $this->_canvas->polygon(array('connect' => false));
  82      }
  83  
  84      /**
  85       * Output the plot
  86       *
  87       * @return bool Was the output 'good' (true) or 'bad' (false).
  88       * @access private
  89       */
  90      function _done()
  91      {
  92          if (parent::_done() === false) {
  93              return false;
  94          }
  95  
  96          if (!is_array($this->_dataset)) {
  97              return false;
  98          }
  99          
 100          $this->_canvas->startGroup(get_class($this) . '_' . $this->_title);
 101          $this->_clip(true);
 102          reset($this->_dataset);
 103  
 104          if ($this->_multiType == 'stacked100pct') {
 105              $total = $this->_getTotals();
 106          }
 107  
 108          $p1 = false;
 109  
 110          $keys = array_keys($this->_dataset);
 111          foreach ($keys as $key) {
 112              $dataset =& $this->_dataset[$key];
 113              $dataset->_reset();
 114              $numPoints = 0;
 115              while ($point = $dataset->_next()) {
 116                  if (($this->_multiType == 'stacked') ||
 117                      ($this->_multiType == 'stacked100pct'))
 118                  {
 119                      $x = $point['X'];
 120                      if (!isset($current[$x])) {
 121                          $current[$x] = 0;
 122                      }
 123                      if ($this->_multiType == 'stacked') {
 124                          $py = $current[$x] + $point['Y'];
 125                      } else {
 126                          $py = 100 * ($current[$x] + $point['Y']) / $total['TOTAL_Y'][$x];
 127                      }
 128                      $current[$x] += $point['Y'];
 129                      $point['Y'] = $py;
 130                  }
 131  
 132                  if ($point['Y'] === null) {
 133                      if ($numPoints > 1) {
 134                          $this->_getLineStyle($key);
 135                          $this->_canvas->polygon(array('connect' => false, 'map_vertices' => true));
 136                      }
 137                      else {
 138                          $this->_canvas->reset();
 139                      }
 140                      $numPoints = 0;
 141                  } else {
 142                      $p2['X'] = $this->_pointX($point);
 143                      $p2['Y'] = $this->_pointY($point);
 144      
 145                      $this->_canvas->addVertex(
 146                          $this->_mergeData(
 147                              $point,
 148                              array('x' => $p2['X'], 'y' => $p2['Y'])
 149                          )
 150                      );
 151                      $numPoints++;
 152                  }
 153              }
 154              if ($numPoints > 1) {
 155                  $this->_getLineStyle($key);
 156                  $this->_canvas->polygon(array('connect' => false, 'map_vertices' => true));
 157              }
 158              else {
 159                  $this->_canvas->reset();
 160              }
 161          }
 162          unset($keys);
 163          $this->_drawMarker();
 164          $this->_clip(false);
 165          $this->_canvas->endGroup();
 166          return true;
 167      }
 168  
 169  }
 170  
 171  ?>