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279 lines
11 KiB
279 lines
11 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 chamilo.exercise
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* @author Eric Marguin
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*/
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/**
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* Code
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*/
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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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{
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static $typePicture = 'mcma.gif';
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static $explanationLangVar = 'MultipleSelect';
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/**
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* Constructor
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*/
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public function MultipleAnswer($course_code = null)
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{
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parent::question($course_code);
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$this->type = MULTIPLE_ANSWER;
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$this->isContent = $this->getIsContent();
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}
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/**
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* function which redefines Question::createAnswersForm
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* @param FormValidator instance
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*/
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public function createAnswersForm($form)
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{
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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 = $this->exercise;
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$html = '<table class="data_table">
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<tr>
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<th width="10px">
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'.get_lang('Number').'
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</th>
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<th width="10px">
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'.get_lang('True').'
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</th>
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<th width="50%">
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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 (!empty($obj_ex) && $obj_ex->selectFeedbackType() != EXERCISE_FEEDBACK_TYPE_EXAM) {
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$html .= '<th>
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'.get_lang('Comment').'
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</th>';
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}
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$html .= '<th width="50px">
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'.get_lang('Weighting').'
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</th>
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</tr>';
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$form->addElement('label', get_lang('Answers').'<br />'.Display::return_icon('fill_field.png'), $html);
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$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 (isset($answer) && is_object($answer)) {
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$answer_id = $answer->getRealAnswerIdFromList($i);
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$defaults['answer['.$i.']'] = isset($answer->answer[$answer_id]) ? $answer->answer[$answer_id] : null;
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$defaults['comment['.$i.']'] = isset($answer->comment[$answer_id]) ? $answer->comment[$answer_id] : null;
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$defaults['weighting['.$i.']'] = isset($answer->weighting[$answer_id]) ? Text::float_format(
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$answer->weighting[$answer_id],
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1
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) : null;
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$defaults['correct['.$i.']'] = isset($answer->correct[$answer_id]) ? $answer->correct[$answer_id] : null;
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} else {
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$defaults['answer[1]'] = get_lang('DefaultMultipleAnswer2');
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$defaults['comment[1]'] = get_lang('DefaultMultipleComment2');
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$defaults['correct[1]'] = true;
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$defaults['weighting[1]'] = 10;
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$defaults['answer[2]'] = get_lang('DefaultMultipleAnswer1');
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$defaults['comment[2]'] = get_lang('DefaultMultipleComment1');
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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(
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'<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>',
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'correct['.$i.']'
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);
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$renderer->setElementTemplate(
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'<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>',
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'counter['.$i.']'
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);
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$renderer->setElementTemplate(
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'<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>',
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'answer['.$i.']'
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);
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$renderer->setElementTemplate(
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'<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>',
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'comment['.$i.']'
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);
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$renderer->setElementTemplate(
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'<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>',
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'weighting['.$i.']'
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);
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$answer_number = $form->addElement('text', 'counter['.$i.']', 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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if ($obj_ex->fastEdition) {
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$form->addElement(
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'textarea',
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'answer['.$i.']',
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null,
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$this->textareaSettings
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);
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} else {
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$form->addElement(
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'html_editor',
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'answer['.$i.']',
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null,
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'style="vertical-align:middle"',
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array('ToolbarSet' => 'TestProposedAnswer', 'Width' => '100%', 'Height' => '100')
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);
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}
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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 (!empty($obj_ex) && $obj_ex->selectFeedbackType() != EXERCISE_FEEDBACK_TYPE_EXAM) {
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if ($obj_ex->fastEdition) {
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$form->addElement(
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'textarea',
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'comment['.$i.']',
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null,
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$this->textareaSettings
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);
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} else {
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$form->addElement(
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'html_editor',
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'comment['.$i.']',
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null,
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'style="vertical-align:middle"',
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array('ToolbarSet' => 'TestProposedAnswer', 'Width' => '100%', 'Height' => '100')
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);
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}
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}
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$form->addElement('text', 'weighting['.$i.']', null, array('class' => "span1", 'value' => '0'));
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$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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$navigator_info = api_get_navigator();
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if ($form->isFrozen() == false) {
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if ($obj_ex->edit_exercise_in_lp == true) {
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//ie6 fix
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if ($navigator_info['name'] == 'Internet Explorer' && $navigator_info['version'] == '6') {
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$form->addElement('submit', 'lessAnswers', get_lang('LessAnswer'), 'class="btn minus"');
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$form->addElement('submit', 'moreAnswers', get_lang('PlusAnswer'), 'class="btn plus"');
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$form->addElement('submit', 'submitQuestion', $this->submitText, 'class="'.$this->submitClass.'"');
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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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$form->addElement('style_submit_button', 'lessAnswers', get_lang('LessAnswer'), 'class="btn minus"');
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$form->addElement('style_submit_button', 'moreAnswers', get_lang('PlusAnswer'), 'class="btn plus"');
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$form->addElement(
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'style_submit_button',
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'submitQuestion',
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$this->submitText,
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'class="'.$this->submitClass.'"'
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);
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}
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}
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$renderer->setElementTemplate('{element} ', 'lessAnswers');
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$renderer->setElementTemplate('{element} ', 'submitQuestion');
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$renderer->setElementTemplate('{element} ', 'moreAnswers');
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}
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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' => $nb_answers));
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}
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/**
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* abstract function which creates the form to create / edit the answers of the question
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* @param FormValidator instance
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*/
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public function processAnswersCreation($form)
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{
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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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$this->save();
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}
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/**
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* {@inheritdoc}
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*/
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public function return_header($feedback_type = null, $counter = null, $score = null, $show_media = false, $hideTitle = 0)
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{
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$header = parent::return_header($feedback_type, $counter, $score, $show_media, $hideTitle);
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$header .= '<table class="'.$this->question_table_class.'">
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<tr>
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<th>'.get_lang("Choice").'</th>
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<th>'.get_lang("ExpectedChoice").'</th>
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<th>'.get_lang("Answer").'</th>';
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if ($feedback_type != EXERCISE_FEEDBACK_TYPE_EXAM) {
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$header .= '<th>'.get_lang("Comment").'</th>';
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} else {
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$header .= '<th> </th>';
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}
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$header .= '</tr>';
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return $header;
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}
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}
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