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239 lines
7.6 KiB
239 lines
7.6 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* File containing the MultipleAnswer class.
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* @package dokeos.exercise
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* @author Eric Marguin
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*/
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if(!class_exists('MultipleAnswer')):
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/**
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CLASS MultipleAnswer
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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 chamilo.exercise
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**/
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class MultipleAnswer extends Question {
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static $typePicture = 'mcma.gif';
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static $explanationLangVar = 'MultipleSelect';
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/**
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* Constructor
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*/
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function MultipleAnswer(){
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parent::question();
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$this -> type = MULTIPLE_ANSWER;
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$this -> isContent = $this-> getIsContent();
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}
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/**
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* function which redifines Question::createAnswersForm
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* @param the formvalidator instance
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* @param the answers number to display
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*/
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function createAnswersForm ($form) {
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$nb_answers = isset($_POST['nb_answers']) ? $_POST['nb_answers'] : 4; // The previous default value was 2. See task #1759.
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$nb_answers += (isset($_POST['lessAnswers']) ? -1 : (isset($_POST['moreAnswers']) ? 1 : 0));
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$obj_ex = $_SESSION['objExercise'];
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$html='
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<div class="row">
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<div class="label">
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'.get_lang('Answers').'<br /><img src="../img/fill_field.png">
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</div>
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<div class="formw">
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<table class="data_table">
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<tr style="text-align: center;">
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<th>
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'.get_lang('Number').'
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</th>
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<th>
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'.get_lang('True').'
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</th>
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<th>
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'.get_lang('Answer').'
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</th>';
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// show column comment when feedback is enable
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if ($obj_ex->selectFeedbackType() != EXERCISE_FEEDBACK_TYPE_EXAM ) {
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$html .='<th>
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'.get_lang('Comment').'
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</th>';
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}
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$html .= '<th>
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'.get_lang('Weighting').'
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</th>
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</tr>';
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$form -> addElement ('html', $html);
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$defaults = array();
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$correct = 0;
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if(!empty($this -> id)) {
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$answer = new Answer($this -> id);
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$answer -> read();
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if(count($answer->nbrAnswers)>0 && !$form->isSubmitted()) {
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$nb_answers = $answer->nbrAnswers;
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}
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}
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$form -> addElement('hidden', 'nb_answers');
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$boxes_names = array();
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if ($nb_answers < 1) {
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$nb_answers = 1;
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Display::display_normal_message(get_lang('YouHaveToCreateAtLeastOneAnswer'));
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}
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for($i = 1 ; $i <= $nb_answers ; ++$i) {
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if(is_object($answer)) {
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$defaults['answer['.$i.']'] = $answer -> answer[$i];
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$defaults['comment['.$i.']'] = $answer -> comment[$i];
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$defaults['weighting['.$i.']'] = float_format($answer -> weighting[$i], 1);
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$defaults['correct['.$i.']'] = $answer -> correct[$i];
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} else {
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$defaults['answer[1]'] = get_lang('langDefaultMultipleAnswer2');
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$defaults['comment[1]'] = get_lang('langDefaultMultipleComment2');
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$defaults['correct[1]'] = true;
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$defaults['weighting[1]'] = 10;
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$defaults['answer[2]'] = get_lang('langDefaultMultipleAnswer1');
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$defaults['comment[2]'] = get_lang('langDefaultMultipleComment1');
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$defaults['correct[2]'] = false;
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$defaults['weighting[2]'] = -5;
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}
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$renderer = & $form->defaultRenderer();
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$renderer->setElementTemplate('<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>');
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$answer_number=$form->addElement('text', null,null,'value="'.$i.'"');
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$answer_number->freeze();
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$form->addElement('checkbox', 'correct['.$i.']', null, null, 'class="checkbox" style="margin-left: 0em;"');
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$boxes_names[] = 'correct['.$i.']';
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$form->addElement('html_editor', 'answer['.$i.']',null, 'style="vertical-align:middle"', array('ToolbarSet' => 'TestProposedAnswer', 'Width' => '100%', 'Height' => '100'));
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$form->addRule('answer['.$i.']', get_lang('ThisFieldIsRequired'), 'required');
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// show comment when feedback is enable
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if ($obj_ex->selectFeedbackType() != EXERCISE_FEEDBACK_TYPE_EXAM) {
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$form->addElement('html_editor', 'comment['.$i.']',null, 'style="vertical-align:middle"', array('ToolbarSet' => 'TestProposedAnswer', 'Width' => '100%', 'Height' => '100'));
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}
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$form->addElement('text', 'weighting['.$i.']',null, 'style="vertical-align:middle;margin-left: 0em;" size="5" value="0"');
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$form -> addElement ('html', '</tr>');
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}
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$form -> addElement ('html', '</table>');
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$form -> addElement ('html', '<br />');
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$form -> add_multiple_required_rule ($boxes_names , get_lang('ChooseAtLeastOneCheckbox') , 'multiple_required');
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$navigator_info = api_get_navigator();
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global $text, $class, $show_quiz_edition;
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if ($show_quiz_edition) {
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//ie6 fix
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if ($navigator_info['name']=='Internet Explorer' && $navigator_info['version']=='6') {
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$form->addElement('submit', 'lessAnswers', get_lang('LessAnswer'),'class="minus"');
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$form->addElement('submit', 'moreAnswers', get_lang('PlusAnswer'),'class="plus"');
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$form->addElement('submit','submitQuestion',$text, 'class="'.$class.'"');
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} else {
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// setting the save button here and not in the question class.php
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$form->addElement('style_submit_button', 'lessAnswers', get_lang('LessAnswer'),'class="minus"');
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$form->addElement('style_submit_button', 'moreAnswers', get_lang('PlusAnswer'),'class="plus"');
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$form->addElement('style_submit_button','submitQuestion',$text, 'class="'.$class.'"');
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}
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}
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$renderer->setElementTemplate('{element} ','lessAnswers');
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$renderer->setElementTemplate('{element} ','submitQuestion');
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$renderer->setElementTemplate('{element}','moreAnswers');
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$form -> addElement ('html', '</div></div>');
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$defaults['correct'] = $correct;
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if (!empty($this -> id)) {
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$form -> setDefaults($defaults);
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} else {
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if ($this -> isContent == 1) {
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$form -> setDefaults($defaults);
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}
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}
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$form->setConstants(array('nb_answers' => $nb_answers));
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}
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/**
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* abstract function which creates the form to create / edit the answers of the question
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* @param the formvalidator instance
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* @param the answers number to display
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*/
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function processAnswersCreation($form) {
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$questionWeighting = $nbrGoodAnswers = 0;
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$objAnswer = new Answer($this->id);
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$nb_answers = $form->getSubmitValue('nb_answers');
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for($i=1 ; $i <= $nb_answers ; $i++) {
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$answer = trim($form -> getSubmitValue('answer['.$i.']'));
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$comment = trim($form -> getSubmitValue('comment['.$i.']'));
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$weighting = trim($form -> getSubmitValue('weighting['.$i.']'));
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$goodAnswer = trim($form -> getSubmitValue('correct['.$i.']'));
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if($goodAnswer){
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$weighting = abs($weighting);
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} else {
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$weighting = abs($weighting);
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$weighting = -$weighting;
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}
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if($weighting > 0) {
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$questionWeighting += $weighting;
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}
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$objAnswer -> createAnswer($answer,$goodAnswer,$comment,$weighting,$i);
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}
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// saves the answers into the data base
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$objAnswer -> save();
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// sets the total weighting of the question
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$this->updateWeighting($questionWeighting);
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$this->save();
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}
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function return_header($feedback_type, $counter = null) {
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parent::return_header($feedback_type, $counter);
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$header = '<table width="100%" border="0" cellspacing="3" cellpadding="3">
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<tr>
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<td> </td>
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</tr>
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<tr>
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<td><i>'.get_lang("Choice").'</i> </td>
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<td><i>'. get_lang("ExpectedChoice").'</i></td>
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<td><i>'. get_lang("Answer").'</i></td>';
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if ($feedback_type != EXERCISE_FEEDBACK_TYPE_EXAM) {
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$header .= '<td><i>'.get_lang("Comment").'</i></td>';
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} else {
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$header .= '<td> </td>';
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}
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$header .= '
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</tr>
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<tr>
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<td> </td>
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</tr>';
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return $header;
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}
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}
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endif;
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?>
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