[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 DataPreprocessor
  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: Function.php,v 1.7 2005/11/11 17:53:44 nosey Exp $
  28   * @link       http://pear.php.net/package/Image_Graph
  29   */
  30  
  31  /**
  32   * Include file Image/Graph/DataPreprocessor.php
  33   */
  34  require_once  'Image/Graph/DataPreprocessor.php';
  35  
  36  /**
  37   * Formatting a value using a userdefined function.
  38   *
  39   * Use this method to convert/format a value to a 'displayable' lable using a (perhaps)
  40   * more complex function. An example could be (not very applicable though) if one would
  41   * need for values to be displayed on the reverse order, i.e. 1234 would be displayed as
  42   * 4321, then this method can solve this by creating the function that converts the value
  43   * and use the FunctionData datapreprocessor to make Image_Graph use this function.
  44   *
  45   * @category   Images
  46   * @package    Image_Graph
  47   * @subpackage DataPreprocessor
  48   * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
  49   * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
  50   * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
  51   * @version    Release: 0.7.2
  52   * @link       http://pear.php.net/package/Image_Graph
  53   */
  54  class Image_Graph_DataPreprocessor_Function extends Image_Graph_DataPreprocessor
  55  {
  56  
  57      /**
  58       * The name of the PHP function
  59       * @var string
  60       * @access private
  61       */
  62      var $_dataFunction;
  63  
  64      /**
  65       * Create a FunctionData preprocessor
  66       *
  67       * @param string $function The name of the PHP function to use as
  68       *   a preprocessor, this function must take a single parameter and return a
  69       *   formatted version of this parameter
  70       */
  71      function Image_Graph_DataPreprocessor_Function($function)
  72      {
  73          parent::Image_Graph_DataPreprocessor();
  74          $this->_dataFunction = $function;
  75      }
  76  
  77      /**
  78       * Process the value
  79       *
  80       * @param var $value The value to process/format
  81       * @return string The processed value
  82       * @access private
  83       */
  84      function _process($value)
  85      {
  86          $function = $this->_dataFunction;
  87          return call_user_func($function, $value);
  88      }
  89  
  90  }
  91  
  92  ?>