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1242 lines
56 KiB
PHP
1242 lines
56 KiB
PHP
<?php // $Id$
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/**
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* The default questiontype class.
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*
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* @version $Id$
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* @author Martin Dougiamas and many others. This has recently been completely
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* rewritten by Alex Smith, Julian Sedding and Gustav Delius as part of
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* the Serving Mathematics project
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* {@link http://maths.york.ac.uk/serving_maths}
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @package quiz
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*//** */
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require_once($CFG->libdir . '/questionlib.php');
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/**
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* This is the base class for Moodle question types.
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*
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* There are detailed comments on each method, explaining what the method is
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* for, and the circumstances under which you might need to override it.
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*
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* Note: the questiontype API should NOT be considered stable yet. Very few
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* question tyeps have been produced yet, so we do not yet know all the places
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* where the current API is insufficient. I would rather learn from the
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* experiences of the first few question type implementors, and improve the
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* interface to meet their needs, rather the freeze the API prematurely and
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* condem everyone to working round a clunky interface for ever afterwards.
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*/
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class default_questiontype {
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/**
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* Name of the question type
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*
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* The name returned should coincide with the name of the directory
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* in which this questiontype is located
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*
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* @return string the name of this question type.
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*/
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function name() {
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return 'default';
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}
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/**
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* The name this question should appear as in the create new question
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* dropdown.
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*
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* @return mixed the desired string, or false to hide this question type in the menu.
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*/
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function menu_name() {
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$name = $this->name();
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$menu_name = get_string($name, 'qtype_' . $name);
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if ($menu_name[0] == '[') {
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// Legacy behavior, if the string was not in the proper qtype_name
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// language file, look it up in the quiz one.
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$menu_name = get_string($this->name(), 'quiz');
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}
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return $menu_name;
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}
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/**
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* @return boolean true if this question can only be graded manually.
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*/
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function is_manual_graded() {
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return false;
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}
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/**
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* @return boolean true if this question type can be used by the random question type.
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*/
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function is_usable_by_random() {
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return true;
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}
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/**
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* Return an instance of the question editing form definition. This looks for a
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* class called edit_{$this->name()}_question_form in the file
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* {$CFG->docroot}/question/type/{$this->name()}/edit_{$this->name()}_question_form.php
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* and if it exists returns an instance of it.
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*
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* @param string $submiturl passed on to the constructor call.
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* @return object an instance of the form definition, or null if one could not be found.
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*/
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function create_editing_form($submiturl, $question) {
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global $CFG;
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require_once("{$CFG->dirroot}/question/type/edit_question_form.php");
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$definition_file = $CFG->dirroot.'/question/type/'.$this->name().'/edit_'.$this->name().'_form.php';
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if (!(is_readable($definition_file) && is_file($definition_file))) {
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return null;
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}
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require_once($definition_file);
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$classname = 'question_edit_'.$this->name().'_form';
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if (!class_exists($classname)) {
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return null;
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}
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return new $classname($submiturl, $question);
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}
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/**
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* This method should be overriden if you want to include a special heading or some other
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* html on a question editing page besides the question editing form.
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*
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* @param question_edit_form $mform a child of question_edit_form
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* @param object $question
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* @param string $wizardnow is '' for first page.
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*/
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function display_question_editing_page(&$mform, $question, $wizardnow){
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print_heading_with_help(get_string("editing".$question->qtype, "quiz"), $question->qtype, "quiz");
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$mform->display();
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}
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/**
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*
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*
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* @param $question
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*/
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function set_default_options(&$question) {
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}
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/**
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* Saves or updates a question after editing by a teacher
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*
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* Given some question info and some data about the answers
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* this function parses, organises and saves the question
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* It is used by {@link question.php} when saving new data from
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* a form, and also by {@link import.php} when importing questions
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* This function in turn calls {@link save_question_options}
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* to save question-type specific options
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* @param object $question the question object which should be updated
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* @param object $form the form submitted by the teacher
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* @param object $course the course we are in
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* @return object On success, return the new question object. On failure,
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* return an object as follows. If the error object has an errors field,
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* display that as an error message. Otherwise, the editing form will be
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* redisplayed with validation errors, from validation_errors field, which
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* is itself an object, shown next to the form fields.
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*/
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function save_question($question, $form, $course) {
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// This default implementation is suitable for most
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// question types.
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// First, save the basic question itself
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$question->name = trim($form->name);
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$question->questiontext = trim($form->questiontext);
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$question->questiontextformat = $form->questiontextformat;
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$question->parent = isset($form->parent)? $form->parent : 0;
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$question->length = $this->actual_number_of_questions($question);
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$question->penalty = isset($form->penalty) ? $form->penalty : 0;
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if (empty($form->image)) {
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$question->image = "";
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} else {
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$question->image = $form->image;
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}
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if (empty($form->generalfeedback)) {
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$question->generalfeedback = '';
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} else {
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$question->generalfeedback = trim($form->generalfeedback);
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}
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if (empty($question->name)) {
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$question->name = substr(strip_tags($question->questiontext), 0, 15);
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if (empty($question->name)) {
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$question->name = '-';
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}
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}
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if ($question->penalty > 1 or $question->penalty < 0) {
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$question->errors['penalty'] = get_string('invalidpenalty', 'quiz');
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}
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if (isset($form->defaultgrade)) {
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$question->defaultgrade = $form->defaultgrade;
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}
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if (!empty($question->id)) { // Question already exists
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// keep existing unique stamp code
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$question->stamp = get_field('question', 'stamp', 'id', $question->id);
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if (!update_record("question", $question)) {
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error("Could not update question!");
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}
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} else { // Question is a new one
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// Set the unique code
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$question->stamp = make_unique_id_code();
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if (!$question->id = insert_record("question", $question)) {
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error("Could not insert new question!");
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}
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}
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// Now to save all the answers and type-specific options
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$form->id = $question->id;
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$form->qtype = $question->qtype;
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$form->category = $question->category;
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$form->questiontext = $question->questiontext;
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$result = $this->save_question_options($form);
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if (!empty($result->error)) {
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error($result->error);
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}
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if (!empty($result->notice)) {
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notice($result->notice, "question.php?id=$question->id");
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}
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if (!empty($result->noticeyesno)) {
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notice_yesno($result->noticeyesno, "question.php?id=$question->id&courseid={$course->id}",
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"edit.php?courseid={$course->id}");
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print_footer($course);
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exit;
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}
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// Give the question a unique version stamp determined by question_hash()
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if (!set_field('question', 'version', question_hash($question), 'id', $question->id)) {
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error('Could not update question version field');
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}
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return $question;
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}
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/**
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* Saves question-type specific options
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*
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* This is called by {@link save_question()} to save the question-type specific data
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* @return object $result->error or $result->noticeyesno or $result->notice
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* @param object $question This holds the information from the editing form,
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* it is not a standard question object.
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*/
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function save_question_options($question) {
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return null;
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}
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/**
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* Changes all states for the given attempts over to a new question
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*
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* This is used by the versioning code if the teacher requests that a question
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* gets replaced by the new version. In order for the attempts to be regraded
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* properly all data in the states referring to the old question need to be
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* changed to refer to the new version instead. In particular for question types
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* that use the answers table the answers belonging to the old question have to
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* be changed to those belonging to the new version.
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*
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* @param integer $oldquestionid The id of the old question
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* @param object $newquestion The new question
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* @param array $attempts An array of all attempt objects in whose states
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* replacement should take place
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*/
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function replace_question_in_attempts($oldquestionid, $newquestion, $attemtps) {
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echo 'Not yet implemented';
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return;
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}
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/**
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* Loads the question type specific options for the question.
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*
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* This function loads any question type specific options for the
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* question from the database into the question object. This information
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* is placed in the $question->options field. A question type is
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* free, however, to decide on a internal structure of the options field.
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* @return bool Indicates success or failure.
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* @param object $question The question object for the question. This object
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* should be updated to include the question type
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* specific information (it is passed by reference).
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*/
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function get_question_options(&$question) {
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if (!isset($question->options)) {
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$question->options = new object;
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}
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// The default implementation attaches all answers for this question
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$question->options->answers = get_records('question_answers', 'question', $question->id, 'id ASC');
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return true;
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}
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/**
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* Deletes states from the question-type specific tables
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*
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* @param string $stateslist Comma separated list of state ids to be deleted
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*/
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function delete_states($stateslist) {
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/// The default question type does not have any tables of its own
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// therefore there is nothing to delete
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return true;
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}
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/**
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* Deletes a question from the question-type specific tables
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*
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* @return boolean Success/Failure
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* @param object $question The question being deleted
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*/
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function delete_question($questionid) {
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/// The default question type does not have any tables of its own
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// therefore there is nothing to delete
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return true;
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}
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/**
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* Returns the number of question numbers which are used by the question
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*
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* This function returns the number of question numbers to be assigned
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* to the question. Most question types will have length one; they will be
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* assigned one number. The 'description' type, however does not use up a
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* number and so has a length of zero. Other question types may wish to
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* handle a bundle of questions and hence return a number greater than one.
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* @return integer The number of question numbers which should be
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* assigned to the question.
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* @param object $question The question whose length is to be determined.
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* Question type specific information is included.
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*/
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function actual_number_of_questions($question) {
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// By default, each question is given one number
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return 1;
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}
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/**
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* Creates empty session and response information for the question
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*
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* This function is called to start a question session. Empty question type
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* specific session data (if any) and empty response data will be added to the
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* state object. Session data is any data which must persist throughout the
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* attempt possibly with updates as the user interacts with the
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* question. This function does NOT create new entries in the database for
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* the session; a call to the {@link save_session_and_responses} member will
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* occur to do this.
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* @return bool Indicates success or failure.
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* @param object $question The question for which the session is to be
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* created. Question type specific information is
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* included.
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* @param object $state The state to create the session for. Note that
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* this will not have been saved in the database so
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* there will be no id. This object will be updated
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* to include the question type specific information
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* (it is passed by reference). In particular, empty
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* responses will be created in the ->responses
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* field.
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* @param object $cmoptions
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* @param object $attempt The attempt for which the session is to be
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* started. Questions may wish to initialize the
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* session in different ways depending on the user id
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* or time available for the attempt.
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*/
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function create_session_and_responses(&$question, &$state, $cmoptions, $attempt) {
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// The default implementation should work for the legacy question types.
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// Most question types with only a single form field for the student's response
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// will use the empty string '' as the index for that one response. This will
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// automatically be stored in and restored from the answer field in the
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// question_states table.
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$state->responses = array(
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'' => '',
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);
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return true;
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}
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/**
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* Restores the session data and most recent responses for the given state
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*
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* This function loads any session data associated with the question
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* session in the given state from the database into the state object.
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* In particular it loads the responses that have been saved for the given
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* state into the ->responses member of the state object.
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*
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* Question types with only a single form field for the student's response
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* will not need not restore the responses; the value of the answer
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* field in the question_states table is restored to ->responses['']
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* before this function is called. Question types with more response fields
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* should override this method and set the ->responses field to an
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* associative array of responses.
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* @return bool Indicates success or failure.
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* @param object $question The question object for the question including any
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* question type specific information.
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* @param object $state The saved state to load the session for. This
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* object should be updated to include the question
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* type specific session information and responses
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* (it is passed by reference).
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*/
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function restore_session_and_responses(&$question, &$state) {
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// The default implementation does nothing (successfully)
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return true;
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}
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/**
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* Saves the session data and responses for the given question and state
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*
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* This function saves the question type specific session data from the
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* state object to the database. In particular for most question types it saves the
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* responses from the ->responses member of the state object. The question type
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* non-specific data for the state has already been saved in the question_states
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* table and the state object contains the corresponding id and
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* sequence number which may be used to index a question type specific table.
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*
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* Question types with only a single form field for the student's response
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* which is contained in ->responses[''] will not have to save this response,
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* it will already have been saved to the answer field of the question_states table.
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* Question types with more response fields should override this method and save
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* the responses in their own database tables.
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* @return bool Indicates success or failure.
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* @param object $question The question object for the question including
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* the question type specific information.
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* @param object $state The state for which the question type specific
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* data and responses should be saved.
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*/
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function save_session_and_responses(&$question, &$state) {
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// The default implementation does nothing (successfully)
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return true;
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}
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/**
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* Returns an array of values which will give full marks if graded as
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* the $state->responses field
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*
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* The correct answer to the question in the given state, or an example of
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* a correct answer if there are many, is returned. This is used by some question
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* types in the {@link grade_responses()} function but it is also used by the
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* question preview screen to fill in correct responses.
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* @return mixed A response array giving the responses corresponding
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* to the (or a) correct answer to the question. If there is
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* no correct answer that scores 100% then null is returned.
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* @param object $question The question for which the correct answer is to
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* be retrieved. Question type specific information is
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* available.
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* @param object $state The state of the question, for which a correct answer is
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* needed. Question type specific information is included.
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*/
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function get_correct_responses(&$question, &$state) {
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/* The default implementation returns the response for the first answer
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that gives full marks. */
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if ($question->options->answers) {
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foreach ($question->options->answers as $answer) {
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if (((int) $answer->fraction) === 1) {
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return array('' => $answer->answer);
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}
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}
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}
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return null;
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}
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/**
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* Return an array of values with the texts for all possible responses stored
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* for the question
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*
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* All answers are found and their text values isolated
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* @return object A mixed object
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* ->id question id. Needed to manage random questions:
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* it's the id of the actual question presented to user in a given attempt
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* ->responses An array of values giving the responses corresponding
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* to all answers to the question. Answer ids are used as keys.
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* The text and partial credit are the object components
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* @param object $question The question for which the answers are to
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* be retrieved. Question type specific information is
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* available.
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*/
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// ULPGC ecastro
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function get_all_responses(&$question, &$state) {
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if (isset($question->options->answers) && is_array($question->options->answers)) {
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$answers = array();
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foreach ($question->options->answers as $aid=>$answer) {
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$r = new stdClass;
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$r->answer = $answer->answer;
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$r->credit = $answer->fraction;
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$answers[$aid] = $r;
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}
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$result = new stdClass;
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$result->id = $question->id;
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$result->responses = $answers;
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return $result;
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} else {
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return null;
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}
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}
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/**
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* Return the actual response to the question in a given state
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* for the question
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*
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* @return mixed An array containing the response or reponses (multiple answer, match)
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* given by the user in a particular attempt.
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* @param object $question The question for which the correct answer is to
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* be retrieved. Question type specific information is
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* available.
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* @param object $state The state object that corresponds to the question,
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* for which a correct answer is needed. Question
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* type specific information is included.
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*/
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// ULPGC ecastro
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function get_actual_response($question, $state) {
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// change length to truncate responses here if you want
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$lmax = 40;
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if (!empty($state->responses)) {
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$responses[] = (strlen($state->responses['']) > $lmax) ?
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substr($state->responses[''], 0, $lmax).'...' : $state->responses[''];
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} else {
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$responses[] = '';
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}
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return $responses;
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}
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|
// ULPGC ecastro
|
|
function get_fractional_grade(&$question, &$state) {
|
|
$maxgrade = $question->maxgrade;
|
|
$grade = $state->grade;
|
|
if ($maxgrade) {
|
|
return (float)($grade/$maxgrade);
|
|
} else {
|
|
return (float)$grade;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Checks if the response given is correct and returns the id
|
|
*
|
|
* @return int The ide number for the stored answer that matches the response
|
|
* given by the user in a particular attempt.
|
|
* @param object $question The question for which the correct answer is to
|
|
* be retrieved. Question type specific information is
|
|
* available.
|
|
* @param object $state The state object that corresponds to the question,
|
|
* for which a correct answer is needed. Question
|
|
* type specific information is included.
|
|
*/
|
|
// ULPGC ecastro
|
|
function check_response(&$question, &$state){
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Prints the question including the number, grading details, content,
|
|
* feedback and interactions
|
|
*
|
|
* This function prints the question including the question number,
|
|
* grading details, content for the question, any feedback for the previously
|
|
* submitted responses and the interactions. The default implementation calls
|
|
* various other methods to print each of these parts and most question types
|
|
* will just override those methods.
|
|
* @param object $question The question to be rendered. Question type
|
|
* specific information is included. The
|
|
* maximum possible grade is in ->maxgrade. The name
|
|
* prefix for any named elements is in ->name_prefix.
|
|
* @param object $state The state to render the question in. The grading
|
|
* information is in ->grade, ->raw_grade and
|
|
* ->penalty. The current responses are in
|
|
* ->responses. This is an associative array (or the
|
|
* empty string or null in the case of no responses
|
|
* submitted). The last graded state is in
|
|
* ->last_graded (hence the most recently graded
|
|
* responses are in ->last_graded->responses). The
|
|
* question type specific information is also
|
|
* included.
|
|
* @param integer $number The number for this question.
|
|
* @param object $cmoptions
|
|
* @param object $options An object describing the rendering options.
|
|
*/
|
|
function print_question(&$question, &$state, $number, $cmoptions, $options) {
|
|
/* The default implementation should work for most question types
|
|
provided the member functions it calls are overridden where required.
|
|
The layout is determined by the template question.html */
|
|
|
|
global $CFG;
|
|
$isgraded = question_state_is_graded($state->last_graded);
|
|
|
|
// If this question is being shown in the context of a quiz
|
|
// get the context so we can determine whether some extra links
|
|
// should be shown. (Don't show these links during question preview.)
|
|
$cm = get_coursemodule_from_instance('quiz', $cmoptions->id);
|
|
if (!empty($cm->id)) {
|
|
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
|
|
} else if (!empty($cm->course)) {
|
|
$context = get_context_instance(CONTEXT_COURSE, $cm->course);
|
|
} else {
|
|
$context = get_context_instance(CONTEXT_SYSTEM, SITEID);
|
|
}
|
|
|
|
// For editing teachers print a link to an editing popup window
|
|
$editlink = '';
|
|
if ($context && has_capability('moodle/question:manage', $context)) {
|
|
$stredit = get_string('edit');
|
|
$linktext = '<img src="'.$CFG->pixpath.'/t/edit.gif" alt="'.$stredit.'" />';
|
|
$editlink = link_to_popup_window('/question/question.php?inpopup=1&id='.$question->id, 'editquestion', $linktext, 450, 550, $stredit, '', true);
|
|
}
|
|
|
|
$generalfeedback = '';
|
|
if ($isgraded && $options->generalfeedback) {
|
|
$generalfeedback = $this->format_text($question->generalfeedback,
|
|
$question->questiontextformat, $cmoptions);
|
|
}
|
|
|
|
$grade = '';
|
|
if ($question->maxgrade and $options->scores) {
|
|
if ($cmoptions->optionflags & QUESTION_ADAPTIVE) {
|
|
$grade = !$isgraded ? '--/' : round($state->last_graded->grade, $cmoptions->decimalpoints).'/';
|
|
}
|
|
$grade .= $question->maxgrade;
|
|
}
|
|
|
|
$comment = stripslashes($state->manualcomment);
|
|
$commentlink = '';
|
|
|
|
if (isset($options->questioncommentlink) && $context && has_capability('mod/quiz:grade', $context)) {
|
|
$strcomment = get_string('commentorgrade', 'quiz');
|
|
$commentlink = '<div class="commentlink">'.link_to_popup_window ($options->questioncommentlink.'?attempt='.$state->attempt.'&question='.$question->id,
|
|
'commentquestion', $strcomment, 450, 650, $strcomment, 'none', true).'</div>';
|
|
}
|
|
|
|
$history = $this->history($question, $state, $number, $cmoptions, $options);
|
|
|
|
include "$CFG->dirroot/question/type/question.html";
|
|
}
|
|
|
|
/*
|
|
* Print history of responses
|
|
*
|
|
* Used by print_question()
|
|
*/
|
|
function history($question, $state, $number, $cmoptions, $options) {
|
|
$history = '';
|
|
if(isset($options->history) and $options->history) {
|
|
if ($options->history == 'all') {
|
|
// show all states
|
|
$states = get_records_select('question_states', "attempt = '$state->attempt' AND question = '$question->id' AND event > '0'", 'seq_number ASC');
|
|
} else {
|
|
// show only graded states
|
|
$states = get_records_select('question_states', "attempt = '$state->attempt' AND question = '$question->id' AND event IN (".QUESTION_EVENTGRADE.','.QUESTION_EVENTCLOSEANDGRADE.")", 'seq_number ASC');
|
|
}
|
|
if (count($states) > 1) {
|
|
$strreviewquestion = get_string('reviewresponse', 'quiz');
|
|
$table = new stdClass;
|
|
$table->width = '100%';
|
|
if ($options->scores) {
|
|
$table->head = array (
|
|
get_string('numberabbr', 'quiz'),
|
|
get_string('action', 'quiz'),
|
|
get_string('response', 'quiz'),
|
|
get_string('time'),
|
|
get_string('score', 'quiz'),
|
|
//get_string('penalty', 'quiz'),
|
|
get_string('grade', 'quiz'),
|
|
);
|
|
} else {
|
|
$table->head = array (
|
|
get_string('numberabbr', 'quiz'),
|
|
get_string('action', 'quiz'),
|
|
get_string('response', 'quiz'),
|
|
get_string('time'),
|
|
);
|
|
}
|
|
|
|
foreach ($states as $st) {
|
|
$st->responses[''] = $st->answer;
|
|
$this->restore_session_and_responses($question, $st);
|
|
$b = ($state->id == $st->id) ? '<b>' : '';
|
|
$be = ($state->id == $st->id) ? '</b>' : '';
|
|
if ($state->id == $st->id) {
|
|
$link = '<b>'.$st->seq_number.'</b>';
|
|
} else {
|
|
if(isset($options->questionreviewlink)) {
|
|
$link = link_to_popup_window ($options->questionreviewlink.'?state='.$st->id.'&number='.$number,
|
|
'reviewquestion', $st->seq_number, 450, 650, $strreviewquestion, 'none', true);
|
|
} else {
|
|
$link = $st->seq_number;
|
|
}
|
|
}
|
|
if ($options->scores) {
|
|
$table->data[] = array (
|
|
$link,
|
|
$b.get_string('event'.$st->event, 'quiz').$be,
|
|
$b.$this->response_summary($question, $st).$be,
|
|
$b.userdate($st->timestamp, get_string('timestr', 'quiz')).$be,
|
|
$b.round($st->raw_grade, $cmoptions->decimalpoints).$be,
|
|
//$b.round($st->penalty, $cmoptions->decimalpoints).$be,
|
|
$b.round($st->grade, $cmoptions->decimalpoints).$be
|
|
);
|
|
} else {
|
|
$table->data[] = array (
|
|
$link,
|
|
$b.get_string('event'.$st->event, 'quiz').$be,
|
|
$b.$this->response_summary($question, $st).$be,
|
|
$b.userdate($st->timestamp, get_string('timestr', 'quiz')).$be,
|
|
);
|
|
}
|
|
}
|
|
$history = make_table($table);
|
|
}
|
|
}
|
|
return $history;
|
|
}
|
|
|
|
|
|
/**
|
|
* Prints the score obtained and maximum score available plus any penalty
|
|
* information
|
|
*
|
|
* This function prints a summary of the scoring in the most recently
|
|
* graded state (the question may not have been submitted for marking at
|
|
* the current state). The default implementation should be suitable for most
|
|
* question types.
|
|
* @param object $question The question for which the grading details are
|
|
* to be rendered. Question type specific information
|
|
* is included. The maximum possible grade is in
|
|
* ->maxgrade.
|
|
* @param object $state The state. In particular the grading information
|
|
* is in ->grade, ->raw_grade and ->penalty.
|
|
* @param object $cmoptions
|
|
* @param object $options An object describing the rendering options.
|
|
*/
|
|
function print_question_grading_details(&$question, &$state, $cmoptions, $options) {
|
|
/* The default implementation prints the number of marks if no attempt
|
|
has been made. Otherwise it displays the grade obtained out of the
|
|
maximum grade available and a warning if a penalty was applied for the
|
|
attempt and displays the overall grade obtained counting all previous
|
|
responses (and penalties) */
|
|
|
|
if (QUESTION_EVENTDUPLICATE == $state->event) {
|
|
echo ' ';
|
|
print_string('duplicateresponse', 'quiz');
|
|
}
|
|
if (!empty($question->maxgrade) && $options->scores) {
|
|
if (question_state_is_graded($state->last_graded)) {
|
|
// Display the grading details from the last graded state
|
|
$grade = new stdClass;
|
|
$grade->cur = round($state->last_graded->grade, $cmoptions->decimalpoints);
|
|
$grade->max = $question->maxgrade;
|
|
$grade->raw = round($state->last_graded->raw_grade, $cmoptions->decimalpoints);
|
|
|
|
// let student know wether the answer was correct
|
|
echo '<div class="correctness ';
|
|
if ($state->last_graded->raw_grade >= $question->maxgrade/1.01) { // We divide by 1.01 so that rounding errors dont matter.
|
|
echo ' correct">';
|
|
print_string('correct', 'quiz');
|
|
} else if ($state->last_graded->raw_grade > 0) {
|
|
echo ' partiallycorrect">';
|
|
print_string('partiallycorrect', 'quiz');
|
|
} else {
|
|
echo ' incorrect">';
|
|
print_string('incorrect', 'quiz');
|
|
}
|
|
echo '</div>';
|
|
|
|
echo '<div class="gradingdetails">';
|
|
// print grade for this submission
|
|
print_string('gradingdetails', 'quiz', $grade);
|
|
if ($cmoptions->penaltyscheme) {
|
|
// print details of grade adjustment due to penalties
|
|
if ($state->last_graded->raw_grade > $state->last_graded->grade){
|
|
echo ' ';
|
|
print_string('gradingdetailsadjustment', 'quiz', $grade);
|
|
}
|
|
// print info about new penalty
|
|
// penalty is relevant only if the answer is not correct and further attempts are possible
|
|
if (($state->last_graded->raw_grade < $question->maxgrade / 1.01)
|
|
and (QUESTION_EVENTCLOSEANDGRADE !== $state->event)) {
|
|
|
|
if ('' !== $state->last_graded->penalty && ((float)$state->last_graded->penalty) > 0.0) {
|
|
// A penalty was applied so display it
|
|
echo ' ';
|
|
print_string('gradingdetailspenalty', 'quiz', $state->last_graded->penalty);
|
|
} else {
|
|
/* No penalty was applied even though the answer was
|
|
not correct (eg. a syntax error) so tell the student
|
|
that they were not penalised for the attempt */
|
|
echo ' ';
|
|
print_string('gradingdetailszeropenalty', 'quiz');
|
|
}
|
|
}
|
|
}
|
|
echo '</div>';
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints the main content of the question including any interactions
|
|
*
|
|
* This function prints the main content of the question including the
|
|
* interactions for the question in the state given. The last graded responses
|
|
* are printed or indicated and the current responses are selected or filled in.
|
|
* Any names (eg. for any form elements) are prefixed with $question->name_prefix.
|
|
* This method is called from the print_question method.
|
|
* @param object $question The question to be rendered. Question type
|
|
* specific information is included. The name
|
|
* prefix for any named elements is in ->name_prefix.
|
|
* @param object $state The state to render the question in. The grading
|
|
* information is in ->grade, ->raw_grade and
|
|
* ->penalty. The current responses are in
|
|
* ->responses. This is an associative array (or the
|
|
* empty string or null in the case of no responses
|
|
* submitted). The last graded state is in
|
|
* ->last_graded (hence the most recently graded
|
|
* responses are in ->last_graded->responses). The
|
|
* question type specific information is also
|
|
* included.
|
|
* The state is passed by reference because some adaptive
|
|
* questions may want to update it during rendering
|
|
* @param object $cmoptions
|
|
* @param object $options An object describing the rendering options.
|
|
*/
|
|
function print_question_formulation_and_controls(&$question, &$state, $cmoptions, $options) {
|
|
/* This default implementation prints an error and must be overridden
|
|
by all question type implementations, unless the default implementation
|
|
of print_question has been overridden. */
|
|
|
|
notify('Error: Question formulation and input controls has not'
|
|
.' been implemented for question type '.$this->name());
|
|
}
|
|
|
|
/**
|
|
* Prints the submit button(s) for the question in the given state
|
|
*
|
|
* This function prints the submit button(s) for the question in the
|
|
* given state. The name of any button created will be prefixed with the
|
|
* unique prefix for the question in $question->name_prefix. The suffix
|
|
* 'submit' is reserved for the single question submit button and the suffix
|
|
* 'validate' is reserved for the single question validate button (for
|
|
* question types which support it). Other suffixes will result in a response
|
|
* of that name in $state->responses which the printing and grading methods
|
|
* can then use.
|
|
* @param object $question The question for which the submit button(s) are to
|
|
* be rendered. Question type specific information is
|
|
* included. The name prefix for any
|
|
* named elements is in ->name_prefix.
|
|
* @param object $state The state to render the buttons for. The
|
|
* question type specific information is also
|
|
* included.
|
|
* @param object $cmoptions
|
|
* @param object $options An object describing the rendering options.
|
|
*/
|
|
function print_question_submit_buttons(&$question, &$state, $cmoptions, $options) {
|
|
/* The default implementation should be suitable for most question
|
|
types. It prints a mark button in the case where individual marking is
|
|
allowed. */
|
|
|
|
if (($cmoptions->optionflags & QUESTION_ADAPTIVE) and !$options->readonly) {
|
|
echo '<input type="submit" name="';
|
|
echo $question->name_prefix;
|
|
echo 'submit" value="';
|
|
print_string('mark', 'quiz');
|
|
echo '" class="submit btn"';
|
|
echo ' />';
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Return a summary of the student response
|
|
*
|
|
* This function returns a short string of no more than a given length that
|
|
* summarizes the student's response in the given $state. This is used for
|
|
* example in the response history table
|
|
* @return string The summary of the student response
|
|
* @param object $question
|
|
* @param object $state The state whose responses are to be summarized
|
|
* @param int $length The maximum length of the returned string
|
|
*/
|
|
function response_summary($question, $state, $length=80) {
|
|
// This should almost certainly be overridden
|
|
$responses = $this->get_actual_response($question, $state);
|
|
if (empty($responses) || !is_array($responses)) {
|
|
$responses = array();
|
|
}
|
|
if (is_array($responses)) {
|
|
$responses = implode(',', $responses);
|
|
}
|
|
return substr($responses, 0, $length);
|
|
}
|
|
|
|
/**
|
|
* Renders the question for printing and returns the LaTeX source produced
|
|
*
|
|
* This function should render the question suitable for a printed problem
|
|
* or solution sheet in LaTeX and return the rendered output.
|
|
* @return string The LaTeX output.
|
|
* @param object $question The question to be rendered. Question type
|
|
* specific information is included.
|
|
* @param object $state The state to render the question in. The
|
|
* question type specific information is also
|
|
* included.
|
|
* @param object $cmoptions
|
|
* @param string $type Indicates if the question or the solution is to be
|
|
* rendered with the values 'question' and
|
|
* 'solution'.
|
|
*/
|
|
function get_texsource(&$question, &$state, $cmoptions, $type) {
|
|
// The default implementation simply returns a string stating that
|
|
// the question is only available online.
|
|
|
|
return get_string('onlineonly', 'texsheet');
|
|
}
|
|
|
|
/**
|
|
* Compares two question states for equivalence of the student's responses
|
|
*
|
|
* The responses for the two states must be examined to see if they represent
|
|
* equivalent answers to the question by the student. This method will be
|
|
* invoked for each of the previous states of the question before grading
|
|
* occurs. If the student is found to have already attempted the question
|
|
* with equivalent responses then the attempt at the question is ignored;
|
|
* grading does not occur and the state does not change. Thus they are not
|
|
* penalized for this case.
|
|
* @return boolean
|
|
* @param object $question The question for which the states are to be
|
|
* compared. Question type specific information is
|
|
* included.
|
|
* @param object $state The state of the question. The responses are in
|
|
* ->responses. This is the only field of $state
|
|
* that it is safe to use.
|
|
* @param object $teststate The state whose responses are to be
|
|
* compared. The state will be of the same age or
|
|
* older than $state. If possible, the method should
|
|
* only use the field $teststate->responses, however
|
|
* any field that is set up by restore_session_and_responses
|
|
* can be used.
|
|
*/
|
|
function compare_responses(&$question, $state, $teststate) {
|
|
// The default implementation performs a comparison of the response
|
|
// arrays. The ordering of the arrays does not matter.
|
|
// Question types may wish to override this (eg. to ignore trailing
|
|
// white space or to make "7.0" and "7" compare equal).
|
|
|
|
return $state->responses === $teststate->responses;
|
|
}
|
|
|
|
/**
|
|
* Checks whether a response matches a given answer
|
|
*
|
|
* This method only applies to questions that use teacher-defined answers
|
|
*
|
|
* @return boolean
|
|
*/
|
|
function test_response(&$question, &$state, $answer) {
|
|
$response = isset($state->responses['']) ? $state->responses[''] : '';
|
|
return ($response == $answer->answer);
|
|
}
|
|
|
|
/**
|
|
* Performs response processing and grading
|
|
*
|
|
* This function performs response processing and grading and updates
|
|
* the state accordingly.
|
|
* @return boolean Indicates success or failure.
|
|
* @param object $question The question to be graded. Question type
|
|
* specific information is included.
|
|
* @param object $state The state of the question to grade. The current
|
|
* responses are in ->responses. The last graded state
|
|
* is in ->last_graded (hence the most recently graded
|
|
* responses are in ->last_graded->responses). The
|
|
* question type specific information is also
|
|
* included. The ->raw_grade and ->penalty fields
|
|
* must be updated. The method is able to
|
|
* close the question session (preventing any further
|
|
* attempts at this question) by setting
|
|
* $state->event to QUESTION_EVENTCLOSEANDGRADE
|
|
* @param object $cmoptions
|
|
*/
|
|
function grade_responses(&$question, &$state, $cmoptions) {
|
|
// The default implementation uses the test_response method to
|
|
// compare what the student entered against each of the possible
|
|
// answers stored in the question, and uses the grade from the
|
|
// first one that matches. It also sets the marks and penalty.
|
|
// This should be good enought for most simple question types.
|
|
|
|
$state->raw_grade = 0;
|
|
foreach($question->options->answers as $answer) {
|
|
if($this->test_response($question, $state, $answer)) {
|
|
$state->raw_grade = $answer->fraction;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Make sure we don't assign negative or too high marks.
|
|
$state->raw_grade = min(max((float) $state->raw_grade,
|
|
0.0), 1.0) * $question->maxgrade;
|
|
|
|
// Update the penalty.
|
|
$state->penalty = $question->penalty * $question->maxgrade;
|
|
|
|
// mark the state as graded
|
|
$state->event = ($state->event == QUESTION_EVENTCLOSE) ? QUESTION_EVENTCLOSEANDGRADE : QUESTION_EVENTGRADE;
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Includes configuration settings for the question type on the quiz admin
|
|
* page
|
|
*
|
|
* TODO: It makes no sense any longer to do the admin for question types
|
|
* from the quiz admin page. This should be changed.
|
|
* Returns an array of objects describing the options for the question type
|
|
* to be included on the quiz module admin page.
|
|
* Configuration options can be included by setting the following fields in
|
|
* the object:
|
|
* ->name The name of the option within this question type.
|
|
* The full option name will be constructed as
|
|
* "quiz_{$this->name()}_$name", the human readable name
|
|
* will be displayed with get_string($name, 'quiz').
|
|
* ->code The code to display the form element, help button, etc.
|
|
* i.e. the content for the central table cell. Be sure
|
|
* to name the element "quiz_{$this->name()}_$name" and
|
|
* set the value to $CFG->{"quiz_{$this->name()}_$name"}.
|
|
* ->help Name of the string from the quiz module language file
|
|
* to be used for the help message in the third column of
|
|
* the table. An empty string (or the field not set)
|
|
* means to leave the box empty.
|
|
* Links to custom settings pages can be included by setting the following
|
|
* fields in the object:
|
|
* ->name The name of the link text string.
|
|
* get_string($name, 'quiz') will be called.
|
|
* ->link The filename part of the URL for the link. The full URL
|
|
* is contructed as
|
|
* "$CFG->wwwroot/question/type/{$this->name()}/$link?sesskey=$sesskey"
|
|
* [but with the relavant calls to the s and rawurlencode
|
|
* functions] where $sesskey is the sesskey for the user.
|
|
* @return array Array of objects describing the configuration options to
|
|
* be included on the quiz module admin page.
|
|
*/
|
|
function get_config_options() {
|
|
// No options by default
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the editing wizard is finished, false otherwise.
|
|
*
|
|
* The default implementation returns true, which is suitable for all question-
|
|
* types that only use one editing form. This function is used in
|
|
* question.php to decide whether we can regrade any states of the edited
|
|
* question and redirect to edit.php.
|
|
*
|
|
* The dataset dependent question-type, which is extended by the calculated
|
|
* question-type, overwrites this method because it uses multiple pages (i.e.
|
|
* a wizard) to set up the question and associated datasets.
|
|
*
|
|
* @param object $form The data submitted by the previous page.
|
|
*
|
|
* @return boolean Whether the wizard's last page was submitted or not.
|
|
*/
|
|
function finished_edit_wizard(&$form) {
|
|
//In the default case there is only one edit page.
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Prints a table of course modules in which the question is used
|
|
*
|
|
* TODO: This should be made quiz-independent
|
|
*
|
|
* This function is used near the end of the question edit forms in all question types
|
|
* It prints the table of quizzes in which the question is used
|
|
* containing checkboxes to allow the teacher to replace the old question version
|
|
*
|
|
* @param object $question
|
|
* @param object $course
|
|
* @param integer $cmid optional The id of the course module currently being edited
|
|
*/
|
|
function print_replacement_options($question, $course, $cmid='0') {
|
|
|
|
// Disable until the versioning code has been fixed
|
|
if (true) {
|
|
return;
|
|
}
|
|
|
|
// no need to display replacement options if the question is new
|
|
if(empty($question->id)) {
|
|
return true;
|
|
}
|
|
|
|
// get quizzes using the question (using the question_instances table)
|
|
$quizlist = array();
|
|
if(!$instances = get_records('quiz_question_instances', 'question', $question->id)) {
|
|
$instances = array();
|
|
}
|
|
foreach($instances as $instance) {
|
|
$quizlist[$instance->quiz] = $instance->quiz;
|
|
}
|
|
$quizlist = implode(',', $quizlist);
|
|
if(empty($quizlist) or !$quizzes = get_records_list('quiz', 'id', $quizlist)) {
|
|
$quizzes = array();
|
|
}
|
|
|
|
// do the printing
|
|
if(count($quizzes) > 0) {
|
|
// print the table
|
|
$strquizname = get_string('modulename', 'quiz');
|
|
$strdoreplace = get_string('replace', 'quiz');
|
|
$straffectedstudents = get_string('affectedstudents', 'quiz', $course->students);
|
|
echo "<tr valign=\"top\">\n";
|
|
echo "<td align=\"right\"><b>".get_string("replacementoptions", "quiz").":</b></td>\n";
|
|
echo "<td align=\"left\">\n";
|
|
echo "<table cellpadding=\"5\" align=\"left\" class=\"generalbox\" width=\"100%\">\n";
|
|
echo "<tr>\n";
|
|
echo "<th align=\"left\" valign=\"top\" nowrap=\"nowrap\" class=\"generaltableheader c0\" scope=\"col\">$strquizname</th>\n";
|
|
echo "<th align=\"center\" valign=\"top\" nowrap=\"nowrap\" class=\"generaltableheader c0\" scope=\"col\">$strdoreplace</th>\n";
|
|
echo "<th align=\"left\" valign=\"top\" nowrap=\"nowrap\" class=\"generaltableheader c0\" scope=\"col\">$straffectedstudents</th>\n";
|
|
echo "</tr>\n";
|
|
foreach($quizzes as $quiz) {
|
|
// work out whethere it should be checked by default
|
|
$checked = '';
|
|
if((int)$cmid === (int)$quiz->id
|
|
or empty($quiz->usercount)) {
|
|
$checked = "checked=\"checked\"";
|
|
}
|
|
|
|
// find how many different students have already attempted this quiz
|
|
$students = array();
|
|
if($attempts = get_records_select('quiz_attempts', "quiz = '$quiz->id' AND preview = '0'")) {
|
|
foreach($attempts as $attempt) {
|
|
if (record_exists('question_states', 'attempt', $attempt->uniqueid, 'question', $question->id, 'originalquestion', 0)) {
|
|
$students[$attempt->userid] = 1;
|
|
}
|
|
}
|
|
}
|
|
$studentcount = count($students);
|
|
|
|
$strstudents = $studentcount === 1 ? $course->student : $course->students;
|
|
echo "<tr>\n";
|
|
echo "<td align=\"left\" class=\"generaltablecell c0\">".format_string($quiz->name)."</td>\n";
|
|
echo "<td align=\"center\" class=\"generaltablecell c0\"><input name=\"q{$quiz->id}replace\" type=\"checkbox\" ".$checked." /></td>\n";
|
|
echo "<td align=\"left\" class=\"generaltablecell c0\">".(($studentcount) ? $studentcount.' '.$strstudents : '-')."</td>\n";
|
|
echo "</tr>\n";
|
|
}
|
|
echo "</table>\n";
|
|
}
|
|
echo "</td></tr>\n";
|
|
}
|
|
|
|
/**
|
|
* Print the start of the question editing form, including the question category,
|
|
* questionname, questiontext, image, defaultgrade, penalty and generalfeedback fields.
|
|
*
|
|
* Three of the fields, image, defaultgrade, penalty, are optional, and
|
|
* can be removed from the from using the $hidefields argument.
|
|
*
|
|
* @param object $question The question object that the form we are printing is for.
|
|
* @param array $err Array of optional error messages to display by each field.
|
|
* Used when the form is being redisplayed after validation failed.
|
|
* @param object $course The course object for the course this question belongs to.
|
|
* @param boolean $usehtmleditor Whether the html editor should be used.
|
|
* @param array $hidefields An array which may contain the strings,
|
|
* 'image', 'defaultgrade' or 'penalty' to remove the corresponding field.
|
|
*/
|
|
function print_question_form_start($question, $err, $course, $usehtmleditor, $hidefields = array()) {
|
|
global $CFG;
|
|
|
|
// If you edit this function, you also need to edit random/editquestion.html.
|
|
|
|
if (!in_array('image', $hidefields)) {
|
|
make_upload_directory("$course->id"); // Just in case
|
|
$coursefiles = get_directory_list("$CFG->dataroot/$course->id", $CFG->moddata);
|
|
foreach ($coursefiles as $filename) {
|
|
if (mimeinfo("icon", $filename) == "image.gif") {
|
|
$images["$filename"] = $filename;
|
|
}
|
|
}
|
|
}
|
|
|
|
include('editquestionstart.html');
|
|
}
|
|
|
|
/**
|
|
* Print the end of the question editing form, including the submit, copy,
|
|
* and cancel button, and the standard hidden fields like the sesskey and
|
|
* the question type.
|
|
*
|
|
* @param object $question The question object that the form we are printing is for.
|
|
* @param string $submitscript Extra attributes, for example 'onsubmit="myfunction"',
|
|
* that is added to the HTML of the submit button.
|
|
* @param string $hiddenfields Extra hidden fields (actually any HTML)
|
|
* to be added at the end of the form.
|
|
*/
|
|
function print_question_form_end($question, $submitscript = '', $hiddenfields = '') {
|
|
global $USER;
|
|
|
|
// If you edit this function, you also need to edit random/editquestion.html.
|
|
|
|
include('editquestionend.html');
|
|
}
|
|
|
|
/**
|
|
* Call format_text from weblib.php with the options appropriate to question types.
|
|
*
|
|
* @param string $text the text to format.
|
|
* @param integer $text the type of text. Normally $question->questiontextformat.
|
|
* @param object $cmoptions the context the string is being displayed in. Only $cmoptions->course is used.
|
|
* @return string the formatted text.
|
|
*/
|
|
function format_text($text, $textformat, $cmoptions) {
|
|
$formatoptions = new stdClass;
|
|
$formatoptions->noclean = true;
|
|
$formatoptions->para = false;
|
|
return format_text($text, $textformat, $formatoptions, $cmoptions->course);
|
|
}
|
|
|
|
/// BACKUP FUNCTIONS ////////////////////////////
|
|
|
|
/*
|
|
* Backup the data in the question
|
|
*
|
|
* This is used in question/backuplib.php
|
|
*/
|
|
function backup($bf,$preferences,$question,$level=6) {
|
|
// The default type has nothing to back up
|
|
return true;
|
|
}
|
|
|
|
/// RESTORE FUNCTIONS /////////////////
|
|
|
|
/*
|
|
* Restores the data in the question
|
|
*
|
|
* This is used in question/restorelib.php
|
|
*/
|
|
function restore($old_question_id,$new_question_id,$info,$restore) {
|
|
// The default question type has nothing to restore
|
|
return true;
|
|
}
|
|
|
|
function restore_map($old_question_id,$new_question_id,$info,$restore) {
|
|
// There is nothing to decode
|
|
return true;
|
|
}
|
|
|
|
function restore_recode_answer($state, $restore) {
|
|
// There is nothing to decode
|
|
return $state->answer;
|
|
}
|
|
|
|
//This function restores the question_rqp_states
|
|
function restore_state($state_id,$info,$restore) {
|
|
// The default question type does not keep its own state information
|
|
return true;
|
|
}
|
|
|
|
}
|
|
|
|
?>
|