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renderer.php
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<?php
/**
* Order question renderer class.
*
* @package qtype
* @subpackage order
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Generates the output for order questions.
*
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qtype_order_renderer extends qtype_with_combined_feedback_renderer {
protected function can_use_drag_and_drop() {
global $USER;
$ie = core_useragent::check_browser_version('MSIE', 6.0);
$ff = core_useragent::check_browser_version('Gecko', 20051106);
$op = core_useragent::check_browser_version('Opera', 9.0);
$sa = core_useragent::check_browser_version('Safari', 412);
$ch = core_useragent::check_browser_version('Chrome', 6);
if ((!$ie && !$ff && !$op && !$sa && !$ch) or !empty($USER->screenreader)) {
return false;
}
return true;
}
public function formulation_and_controls(question_attempt $qa,
question_display_options $options) {
$question = $qa->get_question();
$response = $qa->get_last_qt_data();
$o = html_writer::tag('div', $question->format_questiontext($qa),
array('class' => 'qtext'));
$o .= html_writer::start_tag('div', array('id' => 'ablock_'.$question->id, 'class' => 'ablock'));
$o .= $this->construct_ablock_select($qa, $options);
$o .= html_writer::end_tag('div');
if ($this->can_use_drag_and_drop()) $o .= html_writer::tag('div', '', array('class' => 'clearer'));
if ($qa->get_state() == question_state::$invalid) {
$o .= html_writer::nonempty_tag('div',
$question->get_validation_error($response),
array('class' => 'validationerror'));
}
if ($this->can_use_drag_and_drop()) {
$initparams = new stdClass();
$initparams->qid = $question->id;
$initparams->stemscount = count($question->get_stem_order());
$initparams->ablockcontent = $this->construct_ablock_dragable($qa, $options);
$initparams->readonly = $options->readonly;
global $PAGE;
$PAGE->requires->js_init_call('M.order.Init',
array($initparams),
FALSE,
array('name' => 'order',
'fullpath' => '/question/type/order/order.js',
'requires' => array('yui2-yahoo', 'yui2-event', 'yui2-dom', 'yui2-dragdrop', 'yui2-animation')));
}
return $o;
}
private function construct_ablock_select(question_attempt $qa,
question_display_options $options) {
$question = $qa->get_question();
$response = $qa->get_last_qt_data();
$stemorder = $question->get_stem_order();
$choices = $this->format_choices($question);
$o = html_writer::start_tag('table', array('class' => 'answer'));
$o .= html_writer::start_tag('tbody');
$parity = 0;
foreach ($stemorder as $key => $stemid) {
$o .= html_writer::start_tag('tr', array('class' => 'r' . $parity));
$o .= html_writer::tag('td', $question->format_text(
$question->stems[$stemid], $question->stemformat[$stemid],
$qa, 'qtype_order', 'subquestion', $stemid),
array('class' => 'text'));
$classes = 'control';
$feedback = $this->get_feedback_class_image($qa, $options, $key);
if ($feedback->class) $classes .= ' '.$feedback->class;
$selected = $this->get_selected($question, $response, $key);
$o .= html_writer::tag('td',
html_writer::select($choices, $qa->get_qt_field_name($question->get_field_name($key)), $selected,
array('0' => 'choose'), array('disabled' => $options->readonly)) .
' ' . $feedback->image, array('class' => $classes));
$o .= html_writer::end_tag('tr');
$parity = 1 - $parity;
}
$o .= html_writer::end_tag('tbody');
$o .= html_writer::end_tag('table');
return $o;
}
private function construct_ablock_dragable(question_attempt $qa,
question_display_options $options) {
$question = $qa->get_question();
$response = $qa->get_last_qt_data();
$o = '';
$stemorder = $question->get_stem_order();
$selectedstemorder = $this->get_selected_stemorder($qa);
foreach ($selectedstemorder as $key => $stemid) {
$stemorderkey = array_search($stemid, $stemorder);
$attributes = array(
'id' => 'li_'.$question->id.'_'.$stemorderkey,
'name' => $qa->get_qt_field_name($question->get_field_name($stemorderkey)));
$feedback = $this->get_feedback_class_image($qa, $options, $stemorderkey);
if ($feedback->class) $attributes['class'] = $feedback->class;
$stemcontent = $question->format_text(
$question->stems[$stemid], $question->stemformat[$stemid],
$qa, 'qtype_order', 'subquestion', $stemid);
$o .= html_writer::tag('li', $stemcontent.' '.$feedback->image, $attributes);
}
$classes = 'draglist';
if ($options->readonly) $classes .= ' readonly';
if ($question->horizontal) $classes .= ' inline';
$fieldname = $question->get_dontknow_field_name();
if (array_key_exists($fieldname, $response) and $response[$fieldname]) $classes .= ' deactivateddraglist';
$o .= html_writer::tag('div', '', array('class' => 'clearer'));
$o = html_writer::tag('ul', $o, array('id' => 'ul_'.$question->id, 'class' => $classes));
$attributes = array(
'id' => 'ch_'.$question->id,
'name' => $qa->get_qt_field_name($fieldname),
'type' => 'checkbox',
'onClick' => "M.order.OnClickDontKnow($question->id)");
if (array_key_exists($fieldname, $response) and $response[$fieldname]) $attributes['checked'] = 'on';
$o .= html_writer::empty_tag('input', $attributes);
$o .= ' '.get_string('defaultresponse', 'qtype_order');
foreach ($selectedstemorder as $key => $stemid) {
$stemorderkey = array_search($stemid, $stemorder);
$attributes = array(
'type' => 'hidden',
'id' => $qa->get_qt_field_name($question->get_field_name($stemorderkey)),
'name' => $qa->get_qt_field_name($question->get_field_name($stemorderkey)),
'value' => $key + 1);
$o .= html_writer::empty_tag('input', $attributes);
}
return $o;
}
private function get_selected($question, $response, $key) {
if (array_key_exists($question->get_field_name($key), $response)) {
return $response[$question->get_field_name($key)];
} else {
return 0;
}
}
private function get_feedback_class_image(question_attempt $qa,
question_display_options $options, $key) {
$question = $qa->get_question();
$response = $qa->get_last_qt_data();
$stemorder = $question->get_stem_order();
$stemid = $stemorder[$key];
$ret = new stdClass();
$ret->class = null;
$ret->image = '';
$selected = $this->get_selected($question, $response, $key);
$fraction = (int) ($selected && $selected == $question->get_right_choice_for($stemid));
if ($options->correctness && $selected) {
$ret->class = $this->feedback_class($fraction);
$ret->image = $this->feedback_image($fraction);
}
return $ret;
}
private function get_selected_stemorder($qa) {
$question = $qa->get_question();
$response = $qa->get_last_qt_data();
$selectedstemorder = array();
foreach ($question->get_stem_order() as $key => $stemid) {
$choicenum = $this->get_selected($question, $response, $key);
if ($choicenum == 0) return $question->get_stem_order();
$selectedstemorder[$choicenum - 1] = $stemid;
}
ksort($selectedstemorder);
return $selectedstemorder;
}
public function specific_feedback(question_attempt $qa) {
return $this->combined_feedback($qa);
}
public function format_choices($question) {
$choices = array();
foreach ($question->get_choice_order() as $key => $choiceid) {
$choices[$key] = htmlspecialchars($question->choices[$choiceid]);
}
return $choices;
}
public function correct_response(question_attempt $qa) {
if ($qa->get_state()->is_correct()) return '';
$question = $qa->get_question();
$choices = $question->get_choice_order();
if (count($choices)) {
$table = new html_table();
$table->attributes['class'] = 'generaltable correctanswertable';
foreach ($choices as $key => $subqid) {
$table->data[][] = $question->format_text($question->stems[$subqid],
$question->stemformat[$subqid], $qa,
'qtype_order', 'subquestion', $subqid);
}
return get_string('correctansweris', 'qtype_match', html_writer::table($table));
}
return '';
}
}