/**
* Override default behaviour so that we can use a specialised behaviour
* that caches test results returned by the call to grade_response().
*
* @param question_attempt $qa the attempt we are creating an behaviour for.
* @param string $preferredbehaviour the requested type of behaviour.
* @return question_behaviour the new behaviour object.
*/
public function make_behaviour(question_attempt $qa, $preferredbehaviour)
{
// TODO: see if there's some way or issuing a warning message when
// coderunner questions aren't being used in an adaptive mode.
if ($preferredbehaviour == 'adaptive') {
return new qbehaviour_adaptive_adapted_for_coderunner($qa, $preferredbehaviour);
} else {
return parent::make_behaviour($qa, $preferredbehaviour);
}
}
public function subquestion(question_attempt $qa, question_display_options $options,
$index, question_graded_automatically $subq) {
$fieldprefix = 'sub' . $index . '_';
$fieldname = $fieldprefix . 'answer';
$response = $qa->get_last_qt_var($fieldname);
$inputattributes = array(
'type' => 'radio',
'name' => $qa->get_qt_field_name($fieldname),
);
if ($options->readonly) {
$inputattributes['disabled'] = 'disabled';
}
$result = $this->all_choices_wrapper_start();
$fraction = null;
foreach ($subq->get_order($qa) as $value => $ansid) {
$ans = $subq->answers[$ansid];
$inputattributes['value'] = $value;
$inputattributes['id'] = $inputattributes['name'] . $value;
$isselected = $subq->is_choice_selected($response, $value);
if ($isselected) {
$inputattributes['checked'] = 'checked';
$fraction = $ans->fraction;
} else {
unset($inputattributes['checked']);
}
$class = 'r' . ($value % 2);
if ($options->correctness && $isselected) {
$feedbackimg = $this->feedback_image($ans->fraction);
$class .= ' ' . $this->feedback_class($ans->fraction);
} else {
$feedbackimg = '';
}
$result .= $this->choice_wrapper_start($class);
$result .= html_writer::empty_tag('input', $inputattributes);
$result .= html_writer::tag('label', $subq->format_text($ans->answer,
$ans->answerformat, $qa, 'question', 'answer', $ansid),
array('for' => $inputattributes['id']));
$result .= $feedbackimg;
if ($options->feedback && $isselected && trim($ans->feedback)) {
$result .= html_writer::tag('div',
$subq->format_text($ans->feedback, $ans->feedbackformat,
$qa, 'question', 'answerfeedback', $ansid),
array('class' => 'specificfeedback'));
}
$result .= $this->choice_wrapper_end();
}
$result .= $this->all_choices_wrapper_end();
$feedback = array();
if ($options->feedback && $options->marks >= question_display_options::MARK_AND_MAX &&
$subq->maxmark > 0) {
$a = new stdClass();
$a->mark = format_float($fraction * $subq->maxmark, $options->markdp);
$a->max = format_float($subq->maxmark, $options->markdp);
$feedback[] = html_writer::tag('div', get_string('markoutofmax', 'question', $a));
}
if ($options->rightanswer) {
foreach ($subq->answers as $ans) {
if (question_state::graded_state_for_fraction($ans->fraction) ==
question_state::$gradedright) {
$feedback[] = get_string('correctansweris', 'qtype_multichoice',
$subq->format_text($ans->answer, $ans->answerformat,
$qa, 'question', 'answer', $ansid));
break;
}
}
}
$result .= html_writer::nonempty_tag('div', implode('<br />', $feedback), array('class' => 'outcome'));
return $result;
}
public function check_file_access($qa, $options, $component, $filearea, $args, $forcedownload)
{
if ($component == 'question' && in_array($filearea, array('correctfeedback', 'partiallycorrectfeedback', 'incorrectfeedback'))) {
return $this->check_combined_feedback_file_access($qa, $options, $filearea);
} else {
if ($component == 'question' && $filearea == 'answer') {
$answerid = reset($args);
// Itemid is answer id.
return in_array($answerid, $this->order);
} else {
if ($component == 'question' && $filearea == 'answerfeedback') {
$answerid = reset($args);
// Itemid is answer id.
$response = $this->get_response($qa);
$isselected = false;
foreach ($this->order as $value => $ansid) {
if ($ansid == $answerid) {
$isselected = $this->is_choice_selected($response, $value);
break;
}
}
// Param $options->suppresschoicefeedback is a hack specific to the
// oumultiresponse question type. It would be good to refactor to
// avoid refering to it here.
return $options->feedback && empty($options->suppresschoicefeedback) && $isselected;
} else {
if ($component == 'question' && $filearea == 'hint') {
return $this->check_hint_file_access($qa, $options, $args);
} else {
return parent::check_file_access($qa, $options, $component, $filearea, $args, $forcedownload);
}
}
}
}
}
public function check_file_access($qa, $options, $component, $filearea, $args, $forcedownload)
{
return parent::check_file_access($qa, $options, $component, $filearea, $args, $forcedownload);
}
public function check_file_access($qa, $options, $component, $filearea, $args, $forcedownload)
{
if ($component == 'question' && $filearea == 'answerfeedback') {
$currentanswer = $qa->get_last_qt_var('answer');
if ($this->has_separate_unit_field()) {
$selectedunit = $qa->get_last_qt_var('unit');
} else {
$selectedunit = null;
}
list($value, $unit, $multiplier) = $this->ap->apply_units($currentanswer, $selectedunit);
$answer = $this->get_matching_answer($value, $multiplier);
$answerid = reset($args);
// Itemid is answer id.
return $options->feedback && $answer && $answerid == $answer->id;
} else {
if ($component == 'question' && $filearea == 'hint') {
return $this->check_hint_file_access($qa, $options, $args);
} else {
return parent::check_file_access($qa, $options, $component, $filearea, $args, $forcedownload);
}
}
}
/** @param question_grading_strategy $strategy the strategy to use for grading. */
public function __construct(question_grading_strategy $strategy) {
parent::__construct();
$this->gradingstrategy = $strategy;
}
public function check_file_access($qa, $options, $component, $filearea, $args, $forcedownload)
{
if ($component == 'question' && $filearea == 'answerfeedback') {
$answerid = reset($args);
// itemid is answer id.
$response = $qa->get_last_qt_var('answer', '');
return $options->feedback && ($answerid == $this->trueanswerid && $response || $answerid == $this->falseanswerid && $response !== '');
} else {
return parent::check_file_access($qa, $options, $component, $filearea, $args, $forcedownload);
}
}
/**
* Output the content of the subquestion.
*
* @param question_attempt $qa
* @param question_display_options $options
* @param int $index
* @param question_graded_automatically $subq
* @return string
*/
public function subquestion(question_attempt $qa, question_display_options $options,
$index, question_graded_automatically $subq) {
if (!$subq instanceof qtype_multichoice_multi_question) {
throw new coding_exception('Expecting subquestion of type qtype_multichoice_multi_question');
}
$fieldprefix = 'sub' . $index . '_';
$fieldname = $fieldprefix . 'choice';
// Extract the responses that related to this question + strip off the prefix.
$fieldprefixlen = strlen($fieldprefix);
$response = [];
foreach ($qa->get_last_qt_data() as $name => $val) {
if (substr($name, 0, $fieldprefixlen) == $fieldprefix) {
$name = substr($name, $fieldprefixlen);
$response[$name] = $val;
}
}
$basename = $qa->get_qt_field_name($fieldname);
$inputattributes = array(
'type' => 'checkbox',
'value' => 1,
);
if ($options->readonly) {
$inputattributes['disabled'] = 'disabled';
}
$result = $this->all_choices_wrapper_start();
// Calculate the total score (as we need to know if choices should be marked as 'correct' or 'partial').
$fraction = 0;
foreach ($subq->get_order($qa) as $value => $ansid) {
$ans = $subq->answers[$ansid];
if ($subq->is_choice_selected($response, $value)) {
$fraction += $ans->fraction;
}
}
// Display 'correct' answers as correct, if we are at 100%, otherwise mark them as 'partial'.
$answerfraction = ($fraction > 0.999) ? 1.0 : 0.5;
foreach ($subq->get_order($qa) as $value => $ansid) {
$ans = $subq->answers[$ansid];
$name = $basename.$value;
$inputattributes['name'] = $name;
$inputattributes['id'] = $name;
$isselected = $subq->is_choice_selected($response, $value);
if ($isselected) {
$inputattributes['checked'] = 'checked';
} else {
unset($inputattributes['checked']);
}
$class = 'r' . ($value % 2);
if ($options->correctness && $isselected) {
$thisfrac = ($ans->fraction > 0) ? $answerfraction : 0;
$feedbackimg = $this->feedback_image($thisfrac);
$class .= ' ' . $this->feedback_class($thisfrac);
} else {
$feedbackimg = '';
}
$result .= $this->choice_wrapper_start($class);
$result .= html_writer::empty_tag('input', $inputattributes);
$result .= html_writer::tag('label', $subq->format_text($ans->answer,
$ans->answerformat, $qa, 'question', 'answer', $ansid),
array('for' => $inputattributes['id']));
$result .= $feedbackimg;
if ($options->feedback && $isselected && trim($ans->feedback)) {
$result .= html_writer::tag('div',
$subq->format_text($ans->feedback, $ans->feedbackformat,
$qa, 'question', 'answerfeedback', $ansid),
array('class' => 'specificfeedback'));
}
$result .= $this->choice_wrapper_end();
}
$result .= $this->all_choices_wrapper_end();
$feedback = array();
if ($options->feedback && $options->marks >= question_display_options::MARK_AND_MAX &&
$subq->maxmark > 0) {
$a = new stdClass();
$a->mark = format_float($fraction * $subq->maxmark, $options->markdp);
$a->max = format_float($subq->maxmark, $options->markdp);
$feedback[] = html_writer::tag('div', get_string('markoutofmax', 'question', $a));
}
if ($options->rightanswer) {
$correct = [];
foreach ($subq->answers as $ans) {
if (question_state::graded_state_for_fraction($ans->fraction) != question_state::$gradedwrong) {
$correct[] = $subq->format_text($ans->answer, $ans->answerformat, $qa, 'question', 'answer', $ans->id);
}
}
$correct = '<ul><li>'.implode('</li><li>', $correct).'</li></ul>';
$feedback[] = get_string('correctansweris', 'qtype_multichoice', $correct);
}
$result .= html_writer::nonempty_tag('div', implode('<br />', $feedback), array('class' => 'outcome'));
return $result;
}
public function check_file_access($qa, $options, $component, $filearea, $args, $forcedownload) {
if ($component == 'question' && $filearea == 'answer') {
return true;
} else if ($component == 'question' && $filearea == 'answerfeedback') {
// Full logic to control which feedbacks a student can see is too complex.
// Just allow access to all images. There is a theoretical chance the
// students could see files they are not meant to see by guessing URLs,
// but it is remote.
return $options->feedback;
} else if ($component == 'question' && $filearea == 'hint') {
return $this->check_hint_file_access($qa, $options, $args);
} else {
return parent::check_file_access($qa, $options, $component, $filearea,
$args, $forcedownload);
}
}
public function check_file_access($qa, $options, $component, $filearea, $args, $forcedownload)
{
if ($component == 'question' && $filearea == 'answerfeedback') {
$currentanswer = $qa->get_last_qt_var('answer');
$answer = $qa->get_question()->get_matching_answer(array('answer' => $currentanswer));
$answerid = reset($args);
// itemid is answer id.
return $options->feedback && $answerid == $answer->id;
} else {
if ($component == 'question' && $filearea == 'hint') {
return $this->check_hint_file_access($qa, $options, $args);
} else {
return parent::check_file_access($qa, $options, $component, $filearea, $args, $forcedownload);
}
}
}