protected function definition()
{
$mform = $this->_form;
$mform->addElement('header', 'preferencespage', get_string('reportsettings', 'quiz_statistics'));
$options = array();
foreach (array_keys(quiz_get_grading_options()) as $which) {
$options[$which] = \quiz_statistics_calculator::using_attempts_lang_string($which);
}
$mform->addElement('select', 'whichattempts', get_string('calculatefrom', 'quiz_statistics'), $options);
$mform->addElement('submit', 'submitbutton', get_string('preferencessave', 'quiz_overview'));
}
/**
* @param $course
* @param $cm
* @param $quiz
* @return array to display in table or spreadsheet.
*/
public function get_formatted_quiz_info_data($course, $cm, $quiz)
{
// You can edit this array to control which statistics are displayed.
$todisplay = array('firstattemptscount' => 'number', 'allattemptscount' => 'number', 'firstattemptsavg' => 'summarks_as_percentage', 'allattemptsavg' => 'summarks_as_percentage', 'lastattemptsavg' => 'summarks_as_percentage', 'highestattemptsavg' => 'summarks_as_percentage', 'median' => 'summarks_as_percentage', 'standarddeviation' => 'summarks_as_percentage', 'skewness' => 'number_format', 'kurtosis' => 'number_format', 'cic' => 'number_format_percent', 'errorratio' => 'number_format_percent', 'standarderror' => 'summarks_as_percentage');
// General information about the quiz.
$quizinfo = array();
$quizinfo[get_string('quizname', 'quiz_statistics')] = format_string($quiz->name);
$quizinfo[get_string('coursename', 'quiz_statistics')] = format_string($course->fullname);
if ($cm->idnumber) {
$quizinfo[get_string('idnumbermod')] = $cm->idnumber;
}
if ($quiz->timeopen) {
$quizinfo[get_string('quizopen', 'quiz')] = userdate($quiz->timeopen);
}
if ($quiz->timeclose) {
$quizinfo[get_string('quizclose', 'quiz')] = userdate($quiz->timeclose);
}
if ($quiz->timeopen && $quiz->timeclose) {
$quizinfo[get_string('duration', 'quiz_statistics')] = format_time($quiz->timeclose - $quiz->timeopen);
}
// The statistics.
foreach ($todisplay as $property => $format) {
if (!isset($this->{$property}) || !$format) {
continue;
}
$value = $this->{$property};
switch ($format) {
case 'summarks_as_percentage':
$formattedvalue = quiz_report_scale_summarks_as_percentage($value, $quiz);
break;
case 'number_format_percent':
$formattedvalue = quiz_format_grade($quiz, $value) . '%';
break;
case 'number_format':
// 2 extra decimal places, since not a percentage,
// and we want the same number of sig figs.
$formattedvalue = format_float($value, $quiz->decimalpoints + 2);
break;
case 'number':
$formattedvalue = $value + 0;
break;
default:
$formattedvalue = $value;
}
$quizinfo[get_string($property, 'quiz_statistics', quiz_statistics_calculator::using_attempts_lang_string($this->whichattempts))] = $formattedvalue;
}
return $quizinfo;
}
