[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 Marker
  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: Pointing.php,v 1.8 2005/08/24 20:35:54 nosey Exp $
  28   * @link       http://pear.php.net/package/Image_Graph
  29   */
  30   
  31  /**
  32   * Include file Image/Graph/Marker.php
  33   */
  34  require_once  'Image/Graph/Marker.php';
  35  
  36  /**
  37   * Data marker as a 'pointing marker'.
  38   *
  39   * Points to the data using another marker (as start and/or end)
  40   *
  41   * @category   Images
  42   * @package    Image_Graph
  43   * @subpackage Marker
  44   * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
  45   * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
  46   * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
  47   * @version    Release: 0.7.2
  48   * @link       http://pear.php.net/package/Image_Graph
  49   */
  50  class Image_Graph_Marker_Pointing extends Image_Graph_Marker
  51  {
  52  
  53      /**
  54       * The starting marker
  55       * @var Marker
  56       * @access private
  57       */
  58      var $_markerStart;
  59  
  60      /**
  61       * The ending marker
  62       * @var Marker
  63       * @access private
  64       */
  65      var $_markerEnd;
  66  
  67      /**
  68       * The X offset from the 'data'
  69       * @var int
  70       * @access private
  71       */
  72      var $_deltaX = -1;
  73  
  74      /**
  75       * The Y offset from the 'data'
  76       * @var int
  77       * @access private
  78       */
  79      var $_deltaY = -1;
  80  
  81      /**
  82       * Create an pointing marker, ie a pin on a board
  83       *
  84       * @param int $deltaX The the X offset from the real 'data' point
  85       * @param int $deltaY The the Y offset from the real 'data' point
  86       * @param Marker $markerEnd The ending marker that represents 'the head of
  87       *   the pin'
  88       */
  89      function Image_Graph_Marker_Pointing($deltaX, $deltaY, & $markerEnd)
  90      {
  91          parent::Image_Graph_Marker();
  92          $this->_deltaX = $deltaX;
  93          $this->_deltaY = $deltaY;
  94          $this->_markerStart = null;
  95          $this->_markerEnd =& $markerEnd;
  96      }
  97  
  98      /**
  99       * Sets the starting marker, ie the tip of the pin on a board
 100       *
 101       * @param Marker $markerStart The starting marker that represents 'the tip
 102       *   of the pin'
 103       */
 104      function setMarkerStart(& $markerStart)
 105      {
 106          $this->_markerStart =& $markerStart;
 107          $this->_markerStart->_setParent($this);
 108      }
 109  
 110      /**
 111       * Draw the marker on the canvas
 112       *
 113       * @param int $x The X (horizontal) position (in pixels) of the marker on
 114       *   the canvas
 115       * @param int $y The Y (vertical) position (in pixels) of the marker on the
 116       *   canvas
 117       * @param array $values The values representing the data the marker 'points'
 118       *   to
 119       * @access private
 120       */
 121      function _drawMarker($x, $y, $values = false)
 122      {
 123          parent::_drawMarker($x, $y, $values);
 124          if ($this->_markerStart) {
 125              $this->_markerStart->_setParent($this);
 126              $this->_markerStart->_drawMarker($x, $y, $values);
 127          }
 128          $this->_getLineStyle();
 129          $this->_canvas->line(array('x0' => $x, 'y0' => $y, 'x1' => $x + $this->_deltaX, 'y1' => $y + $this->_deltaY));
 130          $this->_markerEnd->_setParent($this);
 131          $this->_markerEnd->_drawMarker(
 132              $x + $this->_deltaX,
 133              $y + $this->_deltaY,
 134              $values
 135          );
 136      }
 137  
 138  }
 139  
 140  ?>