mods/photo_album/classes/pa_index.class.php

   1 <?php\r
   2 /*==============================================================\r
   3   Photo Album\r
   4  ==============================================================\r
   5   Copyright (c) 2006 by Dylan Cheon & Kelvin Wong\r
   6   Institute for Assistive Technology / University of Victoria\r
   7   http://www.canassist.ca/                                    \r
   8                                                                \r
   9   This program is free software. You can redistribute it and/or\r
  10   modify it under the terms of the GNU General Public License  \r
  11   as published by the Free Software Foundation.                \r
  12  ==============================================================\r
  13  */\r
  14 // $Id:\r
  15 \r
  16 /**\r
  17  * @desc        This file generates thumbnail image data for the index page - thumbnail view\r
  18  * @author      Dylan Cheon & Kelvin Wong\r
  19  * @copyright   2006, Institute for Assistive Technology / University of Victoria \r
  20  * @link        http://www.canassist.ca/                                    \r
  21  * @license GNU\r
  22  */\r
  23  \r
  24 require_once ('pa.class.php');\r
  25 \r
  26 /** \r
  27  * @desc        class Pa_index.\r
  28  * @see         class Pa\r
  29  */\r
  30 class Pa_Index extends Pa {\r
  31         var $current_page=0;\r
  32         var $show_page_left_buttons=false;\r
  33         var $show_page_right_buttons=false;\r
  34         var $image_array=Array();\r
  35         var $page_array=Array();\r
  36         var $total=NOT_SET;\r
  37         var $last_page=NOT_SET;\r
  38         \r
  39         /** \r
  40          * @desc        class constructor\r
  41          */\r
  42         function Pa_Index (){\r
  43                 parent::init();\r
  44                 $this->checkCurrentPage();\r
  45                 $this->setImages();\r
  46                 $this->setPages();\r
  47         }\r
  48         \r
  49         /**\r
  50          * @desc        this function sets the image array to display the index page\r
  51          */\r
  52         function setImages(){\r
  53                 $temp=get_image_array(STUDENT, $this->getVariable('course_id'), APPROVED, $this->getVariable('current_page'), THUMB_NUMBER_OF_IMAGE);\r
  54                 $this->image_array=&$temp;\r
  55         }\r
  56         \r
  57         /**\r
  58          * @desc        This function decides whether the left arrow and right arrow button should be displayed in the page table\r
  59          */\r
  60         function setPages(){\r
  61                 $temp=get_page_array(THUMB_NUMBER_OF_IMAGE, THUMB_NUMBER_OF_IMAGE_PAGE, $this->getVariable('current_page'), $this->getVariable('last_page'));\r
  62                 if ($temp['current'] >1 ){\r
  63                         $this->setVariable('show_page_left_buttons', true);\r
  64                 }\r
  65                 if ($temp['current'] < $temp['last_page']){\r
  66                         $this->setVariable('show_page_right_buttons', true);\r
  67                 }\r
  68                 $this->page_array=&$temp;\r
  69         }\r
  70         \r
  71         /**\r
  72          * @desc        This function sets the given string value\r
  73          * @param       String  $string         string name to be set up\r
  74          * @param       mixed   $value          string value\r
  75          */\r
  76         function setVariable($string, $value){\r
  77                 switch ($string){\r
  78                         case 'current_page':\r
  79                         case 'total':\r
  80                         case 'last_page':\r
  81                                 if (is_int($value)){\r
  82                                         $this->{$string}=$value;\r
  83                                 } else {\r
  84                                         parent::storeError("variable ".$string." is not an positive int");\r
  85                                 }\r
  86                         break;\r
  87                         case 'show_page_left_buttons':\r
  88                         case 'show_page_right_buttons':\r
  89                                 if (is_bool($value)){\r
  90                                         $this->{$string}=$value;\r
  91                                 } else {\r
  92                                         parent::storeError("variable ".$string." is not boolean");\r
  93                                 }\r
  94                         break;\r
  95                 }\r
  96         }\r
  97         \r
  98         /**\r
  99          * @desc        This function checks whether the current page value is valid.  Otherwise it sets 1 for the current page value\r
 100          */\r
 101         function checkCurrentPage(){\r
 102                 $total=get_total_image_number(STUDENT, $this->getVariable('course_id'), APPROVED);\r
 103                 $last_page=get_last_page(THUMB_NUMBER_OF_IMAGE, $total);\r
 104                 $this->setVariable('total', $total);\r
 105                 $this->setVariable('last_page', $last_page);\r
 106                 \r
 107                 if (!isset($_GET['current_page'])){\r
 108                         $this->setVariable('current_page', FIRST_PAGE);\r
 109                 } else {\r
 110                         $current_page=to_pos_int($_GET['current_page']);\r
 111                         if ($current_page > $last_page){\r
 112                                 $this->setVariable('current_page',$last_page);\r
 113                         } else {\r
 114                                 $this->setVariable('current_page', $current_page);\r
 115                         }\r
 116                 }\r
 117         }\r
 118 }