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questiontype.php
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questiontype.php
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<?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/>.
/**
* Question type class for the drag-and-drop onto image question type.
*
* @package qtype_ddimageortext
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot . '/question/type/ddimageortext/questiontypebase.php');
define('QTYPE_DDIMAGEORTEXT_BGIMAGE_MAXWIDTH', 600);
define('QTYPE_DDIMAGEORTEXT_BGIMAGE_MAXHEIGHT', 400);
define('QTYPE_DDIMAGEORTEXT_DRAGIMAGE_MAXWIDTH', 150);
define('QTYPE_DDIMAGEORTEXT_DRAGIMAGE_MAXHEIGHT', 100);
/**
* The drag-and-drop onto image question type class.
*
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qtype_ddimageortext extends qtype_ddtoimage_base {
protected function make_choice($dragdata) {
return new qtype_ddimageortext_drag_item($dragdata->label, $dragdata->no,
$dragdata->draggroup, $dragdata->infinite, $dragdata->id);
}
protected function make_place($dropzonedata) {
return new qtype_ddimageortext_drop_zone($dropzonedata->label, $dropzonedata->no,
$dropzonedata->group,
$dropzonedata->xleft, $dropzonedata->ytop);
}
protected function make_hint($hint) {
return question_hint_with_parts::load_from_record($hint);
}
public function save_question_options($formdata) {
global $DB, $USER;
$context = $formdata->context;
$options = $DB->get_record('qtype_ddimageortext', array('questionid' => $formdata->id));
if (!$options) {
$options = new stdClass();
$options->questionid = $formdata->id;
$options->correctfeedback = '';
$options->partiallycorrectfeedback = '';
$options->incorrectfeedback = '';
$options->id = $DB->insert_record('qtype_ddimageortext', $options);
}
$options->shuffleanswers = !empty($formdata->shuffleanswers);
$options = $this->save_combined_feedback_helper($options, $formdata, $context, true);
$this->save_hints($formdata, true);
$DB->update_record('qtype_ddimageortext', $options);
$DB->delete_records('qtype_ddimageortext_drops', array('questionid' => $formdata->id));
foreach (array_keys($formdata->drops) as $dropno) {
if ($formdata->drops[$dropno]['choice'] == 0) {
continue;
}
$drop = new stdClass();
$drop->questionid = $formdata->id;
$drop->no = $dropno + 1;
$drop->xleft = $formdata->drops[$dropno]['xleft'];
$drop->ytop = $formdata->drops[$dropno]['ytop'];
$drop->choice = $formdata->drops[$dropno]['choice'];
$drop->label = $formdata->drops[$dropno]['droplabel'];
$DB->insert_record('qtype_ddimageortext_drops', $drop);
}
// An array of drag no -> drag id.
$olddragids = $DB->get_records_menu('qtype_ddimageortext_drags',
array('questionid' => $formdata->id),
'', 'no, id');
foreach (array_keys($formdata->drags) as $dragno) {
$info = file_get_draft_area_info($formdata->dragitem[$dragno]);
if ($info['filecount'] > 0 || (trim($formdata->draglabel[$dragno]) != '')) {
$draftitemid = $formdata->dragitem[$dragno];
$drag = new stdClass();
$drag->questionid = $formdata->id;
$drag->no = $dragno + 1;
$drag->draggroup = $formdata->drags[$dragno]['draggroup'];
$drag->infinite = empty($formdata->drags[$dragno]['infinite']) ? 0 : 1;
$drag->label = $formdata->draglabel[$dragno];
if (isset($olddragids[$dragno + 1])) {
$drag->id = $olddragids[$dragno + 1];
unset($olddragids[$dragno + 1]);
$DB->update_record('qtype_ddimageortext_drags', $drag);
} else {
$drag->id = $DB->insert_record('qtype_ddimageortext_drags', $drag);
}
if ($formdata->drags[$dragno]['dragitemtype'] == 'image') {
self::constrain_image_size_in_draft_area($draftitemid,
QTYPE_DDIMAGEORTEXT_DRAGIMAGE_MAXWIDTH,
QTYPE_DDIMAGEORTEXT_DRAGIMAGE_MAXHEIGHT);
file_save_draft_area_files($draftitemid, $formdata->context->id,
'qtype_ddimageortext', 'dragimage', $drag->id,
array('subdirs' => 0, 'maxbytes' => 0, 'maxfiles' => 1));
} else {
// Delete any existing files for draggable text item type.
$fs = get_file_storage();
$fs->delete_area_files($formdata->context->id, 'qtype_ddimageortext',
'dragimage', $drag->id);
}
}
}
if (!empty($olddragids)) {
list($sql, $params) = $DB->get_in_or_equal(array_values($olddragids));
$DB->delete_records_select('qtype_ddimageortext_drags', "id $sql", $params);
}
self::constrain_image_size_in_draft_area($formdata->bgimage,
QTYPE_DDIMAGEORTEXT_BGIMAGE_MAXWIDTH,
QTYPE_DDIMAGEORTEXT_BGIMAGE_MAXHEIGHT);
file_save_draft_area_files($formdata->bgimage, $formdata->context->id,
'qtype_ddimageortext', 'bgimage', $formdata->id,
array('subdirs' => 0, 'maxbytes' => 0, 'maxfiles' => 1));
}
public function move_files($questionid, $oldcontextid, $newcontextid) {
global $DB;
$fs = get_file_storage();
parent::move_files($questionid, $oldcontextid, $newcontextid);
$fs->move_area_files_to_new_context($oldcontextid,
$newcontextid, 'qtype_ddimageortext', 'bgimage', $questionid);
$dragids = $DB->get_records_menu('qtype_ddimageortext_drags',
array('questionid' => $questionid), 'id', 'id,1');
foreach ($dragids as $dragid => $notused) {
$fs->move_area_files_to_new_context($oldcontextid,
$newcontextid, 'qtype_ddimageortext', 'dragimage', $dragid);
}
$this->move_files_in_combined_feedback($questionid, $oldcontextid, $newcontextid);
$this->move_files_in_hints($questionid, $oldcontextid, $newcontextid);
}
/**
* Delete all the files belonging to this question.
* @param int $questionid the question being deleted.
* @param int $contextid the context the question is in.
*/
protected function delete_files($questionid, $contextid) {
global $DB;
$fs = get_file_storage();
parent::delete_files($questionid, $contextid);
$dragids = $DB->get_records_menu('qtype_ddimageortext_drags',
array('questionid' => $questionid), 'id', 'id,1');
foreach ($dragids as $dragid => $notused) {
$fs->delete_area_files($contextid, 'qtype_ddimageortext', 'dragimage', $dragid);
}
$this->delete_files_in_combined_feedback($questionid, $contextid);
$this->delete_files_in_hints($questionid, $contextid);
}
public function export_to_xml($question, qformat_xml $format, $extra = null) {
$fs = get_file_storage();
$contextid = $question->contextid;
$output = '';
if ($question->options->shuffleanswers) {
$output .= " <shuffleanswers/>\n";
}
$output .= $format->write_combined_feedback($question->options,
$question->id,
$question->contextid);
$files = $fs->get_area_files($contextid, 'qtype_ddimageortext', 'bgimage', $question->id);
$output .= " ".$this->write_files($files, 2)."\n";;
foreach ($question->options->drags as $drag) {
$files =
$fs->get_area_files($contextid, 'qtype_ddimageortext', 'dragimage', $drag->id);
$output .= " <drag>\n";
$output .= " <no>{$drag->no}</no>\n";
$output .= $format->writetext($drag->label, 3)."\n";
$output .= " <draggroup>{$drag->draggroup}</draggroup>\n";
if ($drag->infinite) {
$output .= " <infinite/>\n";
}
$output .= $this->write_files($files, 3);
$output .= " </drag>\n";
}
foreach ($question->options->drops as $drop) {
$output .= " <drop>\n";
$output .= $format->writetext($drop->label, 3);
$output .= " <no>{$drop->no}</no>\n";
$output .= " <choice>{$drop->choice}</choice>\n";
$output .= " <xleft>{$drop->xleft}</xleft>\n";
$output .= " <ytop>{$drop->ytop}</ytop>\n";
$output .= " </drop>\n";
}
return $output;
}
public function import_from_xml($data, $question, qformat_xml $format, $extra=null) {
if (!isset($data['@']['type']) || $data['@']['type'] != 'ddimageortext') {
return false;
}
$question = $format->import_headers($data);
$question->qtype = 'ddimageortext';
$question->shuffleanswers = array_key_exists('shuffleanswers',
$format->getpath($data, array('#'), array()));
$filexml = $format->getpath($data, array('#', 'file'), array());
$question->bgimage = $format->import_files_as_draft($filexml);
$drags = $data['#']['drag'];
$question->drags = array();
foreach ($drags as $dragxml) {
$dragno = $format->getpath($dragxml, array('#', 'no', 0, '#'), 0);
$dragindex = $dragno - 1;
$question->drags[$dragindex] = array();
$question->draglabel[$dragindex] =
$format->getpath($dragxml, array('#', 'text', 0, '#'), '', true);
$question->drags[$dragindex]['infinite'] = array_key_exists('infinite', $dragxml['#']);
$question->drags[$dragindex]['draggroup'] =
$format->getpath($dragxml, array('#', 'draggroup', 0, '#'), 1);
$filexml = $format->getpath($dragxml, array('#', 'file'), array());
$question->dragitem[$dragindex] = $format->import_files_as_draft($filexml);
if (count($filexml)) {
$question->drags[$dragindex]['dragitemtype'] = 'image';
} else {
$question->drags[$dragindex]['dragitemtype'] = 'word';
}
}
$drops = $data['#']['drop'];
$question->drops = array();
foreach ($drops as $dropxml) {
$dropno = $format->getpath($dropxml, array('#', 'no', 0, '#'), 0);
$dropindex = $dropno - 1;
$question->drops[$dropindex] = array();
$question->drops[$dropindex]['choice'] =
$format->getpath($dropxml, array('#', 'choice', 0, '#'), 0);
$question->drops[$dropindex]['droplabel'] =
$format->getpath($dropxml, array('#', 'text', 0, '#'), '', true);
$question->drops[$dropindex]['xleft'] =
$format->getpath($dropxml, array('#', 'xleft', 0, '#'), '');
$question->drops[$dropindex]['ytop'] =
$format->getpath($dropxml, array('#', 'ytop', 0, '#'), '');
}
$format->import_combined_feedback($question, $data, true);
$format->import_hints($question, $data, true, false,
$format->get_format($question->questiontextformat));
return $question;
}
}