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<?php // $Id: uniquer_answer.class.php 10234 2006-12-26
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2004 Dokeos S.A.
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Copyright (c) 2003 Ghent University (UGent)
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Copyright (c) 2001 Universite catholique de Louvain (UCL)
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Copyright (c) Olivier Brouckaert
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
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==============================================================================
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*/
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/**
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==============================================================================
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* File containing the Matching class.
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*
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* @author Eric Marguin
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* @package dokeos.exercise
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==============================================================================
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*/
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if(!class_exists('Matching')):
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/**
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CLASS Matching
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*
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* This class allows to instantiate an object of type MULTIPLE_ANSWER (MULTIPLE CHOICE, MULTIPLE ANSWER),
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* extending the class question
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*
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* @author Eric Marguin
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* @package dokeos.exercise
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**/
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class Matching extends Question {
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/**
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* Constructor
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*/
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function Matching(){
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parent::question();
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$this -> type = MATCHING;
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}
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/**
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* function which redifines Question::createAnswersForm
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* @param the formvalidator instance
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*/
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function createAnswersForm ($form) {
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$defaults = array();
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$nb_matches = $nb_options = 2;
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if($form -> isSubmitted())
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{
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$nb_matches = $form -> getSubmitValue('nb_matches');
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$nb_options = $form -> getSubmitValue('nb_options');
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if(isset($_POST['lessMatches']))
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$nb_matches--;
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if(isset($_POST['moreMatches']))
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$nb_matches++;
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if(isset($_POST['lessOptions']))
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$nb_options--;
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if(isset($_POST['moreOptions']))
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$nb_options++;
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}
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else if(!empty($this -> id))
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{
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$answer = new Answer($this -> id);
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$answer -> read();
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if(count($answer->nbrAnswers)>0)
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{
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$a_matches = $a_options = array();
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$nb_matches = $nb_options = 0;
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for($i=1 ; $i<=$answer->nbrAnswers ; $i++){
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if($answer -> isCorrect($i))
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{
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$nb_matches++;
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$defaults['answer['.$nb_matches.']'] = $answer -> selectAnswer($i);
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$defaults['weighting['.$nb_matches.']'] = $answer -> selectWeighting($i);
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$defaults['matches['.$nb_matches.']'] = $answer -> correct[$i];
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}
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else
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{
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$nb_options++;
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$defaults['option['.$nb_options.']'] = $answer -> selectAnswer($i);
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}
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}
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}
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}
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else {
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$defaults['answer[1]'] = get_lang('DefaultMakeCorrespond1');
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$defaults['answer[2]'] = get_lang('DefaultMakeCorrespond2');
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$defaults['matches[2]'] = '2';
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$defaults['option[1]'] = get_lang('DefaultMatchingOptA');
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$defaults['option[2]'] = get_lang('DefaultMatchingOptB');
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}
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$a_matches = array();
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for($i=1 ; $i<=$nb_options ; ++$i)
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{
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$a_matches[$i] = chr(64+$i); // fill the array with A, B, C.....
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}
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$form -> addElement('hidden', 'nb_matches', $nb_matches);
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$form -> addElement('hidden', 'nb_options', $nb_options);
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////////////////////////
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// DISPLAY MATCHES ////
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//////////////////////
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$html='
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<div class="row">
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<div class="label">
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'.get_lang('Answers').'
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</div>
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<div class="formw">
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'.get_lang('MakeCorrespond').'
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<table cellpadding="0" cellspacing="5">
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<tr bgcolor="#e6e6e6">
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<td>
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N<EFBFBD>
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</td>
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<td>
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'.get_lang('Answer').'
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</td>
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<td>
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'.get_lang('MatchesTo').'
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</td>
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<td>
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Weighting
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</td>
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<td width="0"></td>
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</tr>';
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$form -> addElement ('html', $html);
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for($i = 1 ; $i <= $nb_matches ; ++$i)
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{
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$form -> addElement ('html', '<tr><td>');
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$group = array();
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$puce = FormValidator :: createElement ('text', null,null,'value="'.$i.'"');
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$puce->freeze();
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$group[] = $puce;
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$group[] = FormValidator :: createElement ('text', 'answer['.$i.']',null, 'size="30"');
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$group[] = FormValidator :: createElement ('select', 'matches['.$i.']',null,$a_matches);
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$group[] = FormValidator :: createElement ('text', 'weighting['.$i.']',null, 'style="vertical-align:middle" size="2" value="1"');
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$form -> addGroup($group, null, null, '</td><td width="0">');
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$form -> addElement ('html', '</td></tr>');
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}
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$form -> addElement ('html', '</table></div></div>');
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$group = array();
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$group[] = FormValidator :: createElement ('submit', 'lessMatches', '-elem');
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$group[] = FormValidator :: createElement ('submit', 'moreMatches', '+elem');
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$form -> addGroup($group);
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////////////////////////
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// DISPLAY OPTIONS ////
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//////////////////////
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$html='
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<div class="row">
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<div class="label">
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</div>
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<div class="formw"><br /><br />
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<table cellpadding="0" cellspacing="5">
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<tr bgcolor="#e6e6e6">
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<td>
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N<EFBFBD>
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</td>
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<td>
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'.get_lang('Answer').'
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</td>
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<td width="0"></td>
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</tr>';
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$form -> addElement ('html', $html);
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for($i = 1 ; $i <= $nb_options ; ++$i)
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{
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$form -> addElement ('html', '<tr><td>');
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$group = array();
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$puce = FormValidator :: createElement ('text', null,null,'value="'.chr(64+$i).'"');
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$puce->freeze();
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$group[] = $puce;
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$group[] = FormValidator :: createElement ('text', 'option['.$i.']',null, 'size="30"');
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$form -> addGroup($group, null, null, '</td><td width="0">');
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$form -> addElement ('html', '</td></tr>');
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}
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$form -> addElement ('html', '</table></div></div>');
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$group = array();
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$group[] = FormValidator :: createElement ('submit', 'lessOptions', '-elem');
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$group[] = FormValidator :: createElement ('submit', 'moreOptions', '+elem');
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$form -> addGroup($group);
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$form -> setDefaults($defaults);
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$form->setConstants(array('nb_matches' => $nb_matches,'nb_options' => $nb_options));
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}
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/**
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* abstract function which creates the form to create / edit the answers of the question
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* @param the formvalidator instance
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*/
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function processAnswersCreation($form) {
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$nb_matches = $form -> getSubmitValue('nb_matches');
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$nb_options = $form -> getSubmitValue('nb_options');
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$this -> weighting = 0;
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$objAnswer = new Answer($this->id);
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$position = 0;
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// insert the options
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for($i=1 ; $i<=$nb_options ; ++$i)
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{
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$position++;
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$option = $form -> getSubmitValue('option['.$i.']');
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$objAnswer->createAnswer($option, 0, '', 0, $position);
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}
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// insert the answers
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for($i=1 ; $i<=$nb_matches ; ++$i)
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{
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$position++;
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$answer = $form -> getSubmitValue('answer['.$i.']');
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$matches = $form -> getSubmitValue('matches['.$i.']');
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$weighting = $form -> getSubmitValue('weighting['.$i.']');
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$this -> weighting += $weighting;
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$objAnswer->createAnswer($answer,$matches,'',$weighting,$position);
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}
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$objAnswer->save();
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$this->save();
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echo '<script type="text/javascript">window.location.href="admin.php"</script>';
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}
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}
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endif;
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?>
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