[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: Step.php,v 1.15 2005/11/27 22:21:16 nosey Exp $
  28   * @link       http://pear.php.net/package/Image_Graph
  29   */
  30  
  31  /**
  32   * Include file Image/Graph/Plot/Bar.php
  33   */
  34  require_once  'Image/Graph/Plot/Bar.php';
  35  
  36  /**
  37   * Step chart.
  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_Step extends Image_Graph_Plot
  49  {
  50  
  51      /**
  52       * Perform the actual drawing on the legend.
  53       *
  54       * @param int $x0 The top-left x-coordinate
  55       * @param int $y0 The top-left y-coordinate
  56       * @param int $x1 The bottom-right x-coordinate
  57       * @param int $y1 The bottom-right y-coordinate
  58       * @access private
  59       */
  60      function _drawLegendSample($x0, $y0, $x1, $y1)
  61      {
  62          $dx = abs($x1 - $x0) / 3;
  63          $dy = abs($y1 - $y0) / 3;
  64          $this->_canvas->addVertex(array('x' => $x0, 'y' => $y1));
  65          $this->_canvas->addVertex(array('x' => $x0, 'y' => $y0 + $dy));
  66  
  67          $this->_canvas->addVertex(array('x' => $x0 + $dx, 'y' => $y0 + $dy));
  68          $this->_canvas->addVertex(array('x' => $x0 + $dx, 'y' => $y0));
  69  
  70          $this->_canvas->addVertex(array('x' => $x0 + 2*$dx, 'y' => $y0));
  71          $this->_canvas->addVertex(array('x' => $x0 + 2*$dx, 'y' => $y0 + 2*$dy));
  72  
  73          $this->_canvas->addVertex(array('x' => $x1, 'y' => $y0 + 2*$dy));
  74          $this->_canvas->addVertex(array('x' => $x1, 'y' => $y1));
  75          $this->_canvas->polygon(array('connect' => true));
  76      }
  77  
  78      /**
  79       * PlotType [Constructor]
  80       *
  81       * A 'normal' step chart is 'stacked'
  82       *
  83       * @param Dataset $dataset The data set (value containter) to plot
  84       * @param string $multiType The type of the plot
  85       * @param string $title The title of the plot (used for legends,
  86       *   {@link Image_Graph_Legend})
  87       */
  88      function Image_Graph_Plot_Step(& $dataset, $multiType = 'stacked', $title = '')
  89      {
  90          $multiType = strtolower($multiType);
  91          if (($multiType != 'stacked') && ($multiType != 'stacked100pct')) {
  92              $multiType = 'stacked';
  93          }
  94          parent::Image_Graph_Plot($dataset, $multiType, $title);
  95      }
  96  
  97      /**
  98       * Output the plot
  99       *
 100       * @return bool Was the output 'good' (true) or 'bad' (false).
 101       * @access private
 102       */
 103      function _done()
 104      {
 105          if (Image_Graph_Plot::_done() === false) {
 106              return false;
 107          }
 108  
 109          $this->_canvas->startGroup(get_class($this) . '_' . $this->_title);
 110          $this->_clip(true);
 111          
 112          if ($this->_multiType == 'stacked100pct') {
 113              $total = $this->_getTotals();
 114          }
 115  
 116          if ($this->_parent->_horizontal) {
 117              $width = $this->height() / ($this->_maximumX() + 2) / 2;
 118          }
 119          else {
 120              $width = $this->width() / ($this->_maximumX() + 2) / 2;
 121          }
 122  
 123          reset($this->_dataset);
 124          $key = key($this->_dataset);
 125          $dataset =& $this->_dataset[$key];
 126  
 127          $first = $dataset->first();
 128          $last = $dataset->last();
 129  
 130          $point = array ('X' => $first['X'], 'Y' => '#min_pos#');
 131          $firstY = $this->_pointY($point) + ($this->_parent->_horizontal ? $width : 0);
 132          $base[] = $firstY; 
 133          $firstX = $this->_pointX($point) - ($this->_parent->_horizontal ? 0 : $width);
 134          $base[] = $firstX;
 135          
 136          $point = array ('X' => $last['X'], 'Y' => '#min_pos#');
 137          $base[] = $this->_pointY($point) - ($this->_parent->_horizontal ? $width : 0);
 138          $base[] = $this->_pointX($point) + ($this->_parent->_horizontal ? 0 : $width);
 139  
 140          $first = ($this->_parent->_horizontal ? $firstY : $firstX);
 141  
 142          $keys = array_keys($this->_dataset);
 143          foreach ($keys as $key) {
 144              $dataset =& $this->_dataset[$key];
 145              $dataset->_reset();
 146              $polygon = array_reverse($base);
 147              unset ($base);
 148              $last = $first;
 149              while ($point = $dataset->_next()) {
 150                  $x = $point['X'];
 151                  $p = $point;
 152  
 153                  if (!isset($current[$x])) {
 154                      $current[$x] = 0;
 155                  }
 156  
 157                  if ($this->_multiType == 'stacked100pct') {
 158                      $p['Y'] = 100 * ($current[$x] + $point['Y']) / $total['TOTAL_Y'][$x];
 159                  } else {
 160                      $p['Y'] += $current[$x];
 161                  }
 162                  $current[$x] += $point['Y'];
 163                  $point = $p;
 164  
 165                  if ($this->_parent->_horizontal) {
 166                      $x0 = $this->_pointX($point);
 167                      $y0 = $last;
 168                      $x1 = $this->_pointX($point);
 169                      $last = $y1 = $this->_pointY($point) - $width;
 170                  }
 171                  else {
 172                      $x0 = $last;
 173                      $y0 = $this->_pointY($point);
 174                      $last = $x1 = $this->_pointX($point) + $width;
 175                      $y1 = $this->_pointY($point);
 176                  }            
 177                  $polygon[] = $x0; $base[] = $y0;
 178                  $polygon[] = $y0; $base[] = $x0;
 179                  $polygon[] = $x1; $base[] = $y1;
 180                  $polygon[] = $y1; $base[] = $x1;
 181              }
 182  
 183              while (list(, $x) = each($polygon)) {
 184                  list(, $y) = each($polygon);
 185                  $this->_canvas->addVertex(array('x' => $x, 'y' => $y));
 186              }
 187  
 188              $this->_getFillStyle($key);
 189              $this->_getLineStyle($key);
 190              $this->_canvas->polygon(array('connect' => true));
 191          }
 192          unset($keys);
 193          $this->_drawMarker();
 194          $this->_clip(false);
 195          $this->_canvas->endGroup();
 196          return true;
 197      }
 198  }
 199  
 200  ?>