*/
class Draggable extends Question
{
static $typePicture = 'ordering.png';
static $explanationLangVar = 'Draggable';
/**
* Class constructor
*/
public function __construct()
{
parent::__construct();
$this->type = DRAGGABLE;
$this->isContent = $this->getIsContent();
}
/**
* Function which redefines Question::createAnswersForm
* @param FormValidator $form
*/
public function createAnswersForm($form)
{
$defaults = array();
$nb_matches = $nb_options = 2;
$matches = array();
$answer = null;
if ($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) {
$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[' . $nb_matches . ']'] = float_format($answer->selectWeighting($i), 1);
$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');
$defaults['option[2]'] = get_lang('DefaultMatchingOptB');
}
for ($i = 1; $i <= $nb_matches; ++$i) {
$matches[$i] = $i;
}
$form->addElement('hidden', 'nb_matches', $nb_matches);
$form->addElement('hidden', 'nb_options', $nb_options);
// DISPLAY MATCHES
$html = '
| ' . get_lang('Answer') . ' |
' . get_lang('MatchesTo') . ' |
' . get_lang('Weighting') . ' |
';
$form->addHeader(get_lang('MakeCorrespond'));
$form->addHtml($html);
if ($nb_matches < 1) {
$nb_matches = 1;
Display::display_normal_message(get_lang('YouHaveToCreateAtLeastOneAnswer'));
}
for ($i = 1; $i <= $nb_matches; ++$i) {
$renderer = &$form->defaultRenderer();
$renderer->setElementTemplate(
'{error}{element} | ',
"answer[$i]"
);
$renderer->setElementTemplate(
'{error}{element} | ',
"matches[$i]"
);
$renderer->setElementTemplate(
'{error}{element} | ',
"weighting[$i]"
);
$form->addHtml('');
$form->addText("answer[$i]", null);
$form->addSelect("matches[$i]", null, $matches);
$form->addText("weighting[$i]", null, true, ['value' => 10]);
$form->addHtml('
');
}
$form->addHtml('
');
$renderer->setElementTemplate(
'', 'moreMatches');
global $text;
$group = [
$form->addButtonDelete(get_lang('DelElem'), 'lessMatches', true),
$form->addButtonCreate(get_lang('AddElem'), 'moreMatches', true),
$form->addButtonSave($text, 'submitQuestion', true)
];
$form->addGroup($group);
if (!empty($this->id)) {
$form->setDefaults($defaults);
} else {
if ($this->isContent == 1) {
$form->setDefaults($defaults);
}
}
$form->setConstants(
[
'nb_matches' => $nb_matches,
'nb_options' => $nb_options
]
);
}
/**
* Abstract function which creates the form to create / edit the answers of the question
* @param FormValidator $form
*/
public function processAnswersCreation($form)
{
$nb_matches = $form->getSubmitValue('nb_matches');
$this->weighting = 0;
$position = 0;
$objAnswer = new Answer($this->id);
// Insert the options
for ($i = 1; $i <= $nb_matches; ++$i) {
$position++;
$objAnswer->createAnswer($position, 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();
}
/**
* Shows question title an description
* @param string $feedback_type
* @param int $counter
* @param float $score
* @return string
*/
public function return_header($feedback_type = null, $counter = null, $score = null)
{
$header = parent::return_header($feedback_type, $counter, $score);
$header .= '
| ' . get_lang('ElementList') . ' |
' . get_lang('Status') . ' |
';
return $header;
}
}