File Source for matching.class.php

<?php
/*
DOKEOS - elearning and course management software
For a full list of contributors, see documentation/credits.html
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
See "documentation/licence.html" more details.
Contact:
Dokeos
Rue des Palais 44 Paleizenstraat
B-1030 Brussels - Belgium
Tel. +32 (2) 211 34 56
*/
/**
* File containing the Matching class.
* @package dokeos.exercise
* @author Eric Marguin
* @version $Id: admin.php 10680 2007-01-11 21:26:23Z pcool $
*/
if(!class_exists('Matching')):
/**
CLASS Matching
*
* This class allows to instantiate an object of type MULTIPLE_ANSWER (MULTIPLE CHOICE, MULTIPLE ANSWER),
* extending the class question
*
* @author Eric Marguin
* @package dokeos.exercise
***/
class Matching extends Question {
static $typePicture = 'matching.gif';
static $explanationLangVar = 'Matching';
/**
* Constructor
*/
function Matching(){
parent::question();
$this -> type = MATCHING;
}
/**
* function which redifines Question::createAnswersForm
* @param the formvalidator instance
*/
function createAnswersForm ($form) {
$defaults = array();
$nb_matches = $nb_options = 2;
if($form -> isSubmitted())
{
$nb_matches = $form -> getSubmitValue('nb_matches');
$nb_options = $form -> getSubmitValue('nb_options');
if(isset($_POST['lessMatches']))
$nb_matches--;
if(isset($_POST['moreMatches']))
$nb_matches++;
if(isset($_POST['lessOptions']))
$nb_options--;
if(isset($_POST['moreOptions']))
$nb_options++;
}
else if(!empty($this -> id))
{
$answer = new Answer($this -> id);
$answer -> read();
if(count($answer->nbrAnswers)>0)
{
$a_matches = $a_options = array();
$nb_matches = $nb_options = 0;
for($i=1 ; $i<=$answer->nbrAnswers ; $i++){
if($answer -> isCorrect($i))
{
$nb_matches++;
$defaults['answer['.$nb_matches.']'] = $answer -> selectAnswer($i);
$defaults['weighting['.$nb_matches.']'] = $answer -> selectWeighting($i);
$defaults['matches['.$nb_matches.']'] = $answer -> correct[$i];
}
else
{
$nb_options++;
$defaults['option['.$nb_options.']'] = $answer -> selectAnswer($i);
}
}
}
}
else {
$defaults['answer[1]'] = get_lang('DefaultMakeCorrespond1');
$defaults['answer[2]'] = get_lang('DefaultMakeCorrespond2');
$defaults['matches[2]'] = '2';
$defaults['option[1]'] = get_lang('DefaultMatchingOptA');
$defaults['option[2]'] = get_lang('DefaultMatchingOptB');
}
$a_matches = array();
for($i=1 ; $i<=$nb_options ; ++$i)
{
$a_matches[$i] = chr(64+$i); // fill the array with A, B, C.....
}
$form -> addElement('hidden', 'nb_matches', $nb_matches);
$form -> addElement('hidden', 'nb_options', $nb_options);
////////////////////////
// DISPLAY MATCHES ////
//////////////////////
$html='
<div class="row">
<div class="label">
'.get_lang('Answers').'
</div>
<div class="formw">
'.get_lang('MakeCorrespond').'
<table class="data_table">
<tr style="text-align: center">
<th>
'.get_lang('Number').'
</th>
<th>
'.get_lang('Answer').'
</th>
<th>
'.get_lang('MatchesTo').'
</th>
<th>
'.get_lang('Weighting').'
</th>
</tr>';
$form -> addElement ('html', $html);
for($i = 1 ; $i <= $nb_matches ; ++$i)
{
$form -> addElement ('html', '<tr><td>');
$group = array();
$puce = FormValidator :: createElement ('text', null,null,'value="'.$i.'"');
$puce->freeze();
$group[] = $puce;
$group[] = FormValidator :: createElement ('text', 'answer['.$i.']',null, 'size="30" style="margin-left: 0em;"');
$group[] = FormValidator :: createElement ('select', 'matches['.$i.']',null,$a_matches);
$group[] = FormValidator :: createElement ('text', 'weighting['.$i.']',null, 'style="vertical-align:middle;margin-left: 0em;" size="2" value="10"');
$form -> addGroup($group, null, null, '</td><td width="0">');
$form -> addElement ('html', '</td></tr>');
}
$form -> addElement ('html', '</table></div></div>');
$group = array();
$group[] = FormValidator :: createElement ('submit', 'lessMatches', get_lang('DelElem'));
$group[] = FormValidator :: createElement ('submit', 'moreMatches', get_lang('AddElem'));
$form -> addGroup($group);
////////////////////////
// DISPLAY OPTIONS ////
//////////////////////
$html='
<div class="row">
<div class="label">
</div>
<div class="formw"><br /><br />
<table class="data_table">
<tr style="text-align: center;">
<th>
'.get_lang('Number').'
</th>
<th>
'.get_lang('Answer').'
</th>
</tr>';
$form -> addElement ('html', $html);
for($i = 1 ; $i <= $nb_options ; ++$i)
{
$form -> addElement ('html', '<tr><td>');
$group = array();
$puce = FormValidator :: createElement ('text', null,null,'value="'.chr(64+$i).'"');
$puce->freeze();
$group[] = $puce;
$group[] = FormValidator :: createElement ('text', 'option['.$i.']',null, 'size="30" style="margin-left: 0em;"');
$form -> addGroup($group, null, null, '</td><td width="0">');
$form -> addElement ('html', '</td></tr>');
}
$form -> addElement ('html', '</table></div></div>');
$group = array();
$group[] = FormValidator :: createElement ('submit', 'lessOptions', get_lang('DelElem'));
$group[] = FormValidator :: createElement ('submit', 'moreOptions',get_lang('AddElem'));
$form -> addGroup($group);
$form -> setDefaults($defaults);
$form->setConstants(array('nb_matches' => $nb_matches,'nb_options' => $nb_options));
}
/**
* abstract function which creates the form to create / edit the answers of the question
* @param the formvalidator instance
*/
function processAnswersCreation($form) {
$nb_matches = $form -> getSubmitValue('nb_matches');
$nb_options = $form -> getSubmitValue('nb_options');
$this -> weighting = 0;
$objAnswer = new Answer($this->id);
$position = 0;
// insert the options
for($i=1 ; $i<=$nb_options ; ++$i)
{
$position++;
$option = $form -> getSubmitValue('option['.$i.']');
$objAnswer->createAnswer($option, 0, '', 0, $position);
}
// insert the answers
for($i=1 ; $i<=$nb_matches ; ++$i)
{
$position++;
$answer = $form -> getSubmitValue('answer['.$i.']');
$matches = $form -> getSubmitValue('matches['.$i.']');
$weighting = $form -> getSubmitValue('weighting['.$i.']');
$this -> weighting += $weighting;
$objAnswer->createAnswer($answer,$matches,'',$weighting,$position);
}
$objAnswer->save();
$this->save();
}
}
endif;
?>

Source for file matching.class.php