# GoogleChartDataSimpleEncoding.class.php

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    00001 <?php
    00002 /***************************************************************************
    00003  *   Copyright (C) 2008 by Denis M. Gabaidulin                             *
    00004  *                                                                         *
    00005  *   This program is free software; you can redistribute it and/or modify  *
    00006  *   it under the terms of the GNU Lesser General Public License as        *
    00007  *   published by the Free Software Foundation; either version 3 of the    *
    00008  *   License, or (at your option) any later version.                       *
    00009  *                                                                         *
    00010  ***************************************************************************/
    00011
    00015     final class GoogleChartDataSimpleEncoding
    00016         extends BaseGoogleChartDataEncoding
    00017     {
    00018         protected $name = 's:';
    00019
    00020         private $encodingChars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    00021         private $length = null;
    00022
    00026         public static function create()
    00027         {
    00028             return new self;
    00029         }
    00030
    00031         public function __construct()
    00032         {
    00033             $this->length = strlen($this->encodingChars);
    00034         }
    00035
    00036         public function encode(GoogleChartDataSet $set)
    00037         {
    00038             $encodedString = null;
    00039
    00040             foreach ($set->getData() as $dataElement) {
    00041                 if ($dataElement >= 0)
    00042                      $encodedString .=
    00043                         $this->encodingChars[
    00044                             round($this->length - 1)
    00045                             * $dataElement
    00046                             / $this->maxValue
    00047                         ];
    00048                 else
    00049                     $encodedString .= '_';
    00050             }
    00051
    00052             return $encodedString;
    00053         }
    00054
    00055         public function toString()
    00056         {
    00057             return $this->name;
    00058         }
    00059     }
    00060 ?>