Search moodle.org's
Developer Documentation

See Release Notes

  • Bug fixes for general core bugs in 4.0.x will end 8 May 2023 (12 months).
  • Bug fixes for security issues in 4.0.x will end 13 November 2023 (18 months).
  • PHP version: minimum PHP 7.3.0 Note: the minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is also supported.
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Drag-and-drop onto image question renderer class.
 *
 * @package    qtype_ddimageortext
 * @copyright  2010 The Open University
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */


defined('MOODLE_INTERNAL') || die();

/**
 * Generates the output for drag-and-drop onto image questions.
 *
 * @copyright  2010 The Open University
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class qtype_ddtoimage_renderer_base extends qtype_with_combined_feedback_renderer {

    public function clear_wrong(question_attempt $qa) {
        $question = $qa->get_question();
        $response = $qa->get_last_qt_data();

        if (!empty($response)) {
            $cleanresponse = $question->clear_wrong_from_response($response);
        } else {
            $cleanresponse = $response;
        }
        $cleanresponsehtml = '';
        foreach ($cleanresponse as $fieldname => $value) {
            list (, $html) = $this->hidden_field_for_qt_var($qa, $fieldname, $value);
            $cleanresponsehtml .= $html;
        }
        return $cleanresponsehtml;
    }

    public function formulation_and_controls(question_attempt $qa,
            question_display_options $options) {

        $question = $qa->get_question();
        $response = $qa->get_last_qt_data();

        $questiontext = $question->format_questiontext($qa);

        $dropareaclass = 'droparea';
        $draghomesclass = 'draghomes';
        if ($options->readonly) {
            $dropareaclass .= ' readonly';
            $draghomesclass .= ' readonly';
        }

        $output = html_writer::div($questiontext, 'qtext');

        $output .= html_writer::start_div('ddarea');
        $output .= html_writer::start_div($dropareaclass);
        $output .= html_writer::img(self::get_url_for_image($qa, 'bgimage'), get_string('dropbackground', 'qtype_ddmarker'),
                ['class' => 'dropbackground img-fluid w-100']);

        $output .= html_writer::div('', 'dropzones');
        $output .= html_writer::end_div();
        $output .= html_writer::start_div($draghomesclass);

        $dragimagehomes = '';
        foreach ($question->choices as $groupno => $group) {
            $dragimagehomesgroup = '';
            $orderedgroup = $question->get_ordered_choices($groupno);
            foreach ($orderedgroup as $choiceno => $dragimage) {
                $dragimageurl = self::get_url_for_image($qa, 'dragimage', $dragimage->id);
                $classes = [
                        'group' . $groupno,
                        'draghome',
> 'user-select-none',
'choice' . $choiceno ]; if ($dragimage->infinite) { $classes[] = 'infinite'; } if ($dragimageurl === null) { $dragimagehomesgroup .= html_writer::div($dragimage->text, join(' ', $classes), ['src' => $dragimageurl]); } else { $dragimagehomesgroup .= html_writer::img($dragimageurl, $dragimage->text, ['class' => join(' ', $classes)]); } } $dragimagehomes .= html_writer::div($dragimagehomesgroup, 'dragitemgroup' . $groupno); } $output .= $dragimagehomes; $output .= html_writer::end_div(); foreach ($question->places as $placeno => $place) { $varname = $question->field($placeno); list($fieldname, $html) = $this->hidden_field_for_qt_var($qa, $varname, null, ['placeinput', 'place' . $placeno, 'group' . $place->group]); $output .= $html; $question->places[$placeno]->fieldname = $fieldname; } $output .= html_writer::end_div(); $this->page->requires->string_for_js('blank', 'qtype_ddimageortext'); $this->page->requires->js_call_amd('qtype_ddimageortext/question', 'init', [$qa->get_outer_question_div_unique_id(), $options->readonly, $question->places]); if ($qa->get_state() == question_state::$invalid) { $output .= html_writer::div($question->get_validation_error($qa->get_last_qt_data()), 'validationerror'); } return $output; } /** * Returns the URL for an image * * @param object $qa Question attempt object * @param string $filearea File area descriptor * @param int $itemid Item id to get * @return string Output url, or null if not found */ protected static function get_url_for_image(question_attempt $qa, $filearea, $itemid = 0) { $question = $qa->get_question(); $qubaid = $qa->get_usage_id(); $slot = $qa->get_slot(); $fs = get_file_storage(); if ($filearea == 'bgimage') { $itemid = $question->id; } $componentname = $question->qtype->plugin_name(); $draftfiles = $fs->get_area_files($question->contextid, $componentname, $filearea, $itemid, 'id'); if ($draftfiles) { foreach ($draftfiles as $file) { if ($file->is_directory()) { continue; } $url = moodle_url::make_pluginfile_url($question->contextid, $componentname, $filearea, "$qubaid/$slot/{$itemid}", '/', $file->get_filename()); return $url->out(); } } return null; } /** * Returns a hidden field for a qt variable * * @param object $qa Question attempt object * @param string $varname The hidden var name * @param string $value The hidden value * @param array $classes Any additional css classes to apply * @return array Array with field name and the html of the tag */ protected function hidden_field_for_qt_var(question_attempt $qa, $varname, $value = null, $classes = null) { if ($value === null) { $value = $qa->get_last_qt_var($varname); } $fieldname = $qa->get_qt_field_name($varname); $attributes = array('type' => 'hidden', 'id' => str_replace(':', '_', $fieldname), 'name' => $fieldname, 'value' => $value); if ($classes !== null) { $attributes['class'] = join(' ', $classes); } return array($fieldname, html_writer::empty_tag('input', $attributes)."\n"); } public function specific_feedback(question_attempt $qa) { return $this->combined_feedback($qa); } public function correct_response(question_attempt $qa) { return ''; } }