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image.php
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image.php
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<?php
// This file is part of mod_offlinequiz for 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/>.
/**
* Page for viewing scanned answer forms to students
*
* @package mod
* @subpackage offlinequiz
* @author Juergen Zimmer <zimmerj7@univie.ac.at>
* @copyright 2015 Academic Moodle Cooperation {@link http://www.academic-moodle-cooperation.org}
* @since Moodle 2.2
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(dirname(__FILE__) . '/../../config.php');
require_once($CFG->dirroot . '/mod/offlinequiz/report/default.php');
require_once($CFG->dirroot . '/mod/offlinequiz/report/rimport/scanner.php');
require_once($CFG->dirroot . '/mod/offlinequiz/locallib.php');
require_once($CFG->dirroot . '/mod/offlinequiz/evallib.php');
$resultid = required_param('resultid', PARAM_INT);
$pageid = optional_param('pageid', 0, PARAM_INT);
if (!$result = $DB->get_record('offlinequiz_results', array('id' => $resultid))) {
print_error('noresult', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
if (!$scannedpage = $DB->get_record('offlinequiz_scanned_pages', array('id' => $pageid))) {
print_error('nopage', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
if (!$offlinequiz = $DB->get_record("offlinequiz", array('id' => $result->offlinequizid))) {
print_error('noofflinequiz', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
if (!$course = $DB->get_record("course", array('id' => $offlinequiz->course))) {
print_error('nocourse', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
if (!$cm = get_coursemodule_from_instance("offlinequiz", $offlinequiz->id, $course->id)) {
print_error('nocm', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
if (!$groups = $DB->get_records('offlinequiz_groups', array('offlinequizid' => $offlinequiz->id), 'number', '*', 0,
$offlinequiz->numgroups)) {
print_error('nogroups', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
require_login($course->id, false, $cm);
$context = context_module::instance($cm->id);
if (!has_capability('mod/offlinequiz:viewreports', $context) and !has_capability('mod/offlinequiz:attempt', $context)) {
print_error('noaccess', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
if (!has_capability('mod/offlinequiz:viewreports', $context) and $result->userid != $USER->id) {
print_error('noaccess', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
$options = offlinequiz_get_review_options($offlinequiz, $result, $context);
if (!$options->sheetfeedback and !$options->gradedsheetfeedback) {
print_error('noaccess', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
$url = new moodle_url('/mod/offlinequiz/image.php', array('pageid' => $scannedpage->id, 'resultid' => $result->id));
$PAGE->set_url($url);
$PAGE->set_pagelayout('popup');
echo "<style>\n";
echo "body {margin:0px; font-family:Arial,Verdana,Helvetica,sans-serif;}\n";
echo ".imagebutton {width:250px; height:24px; text-align:left; margin-bottom:10px;}\n";
echo "</style>\n";
echo '<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head>';
offlinequiz_load_useridentification();
$offlinequizconfig = get_config('offlinequiz');
$group = $groups[$result->offlinegroupid];
$offlinequiz->groupid =- $group->id;
list($maxquestions, $maxanswers, $formtype, $questionsperpage) = offlinequiz_get_question_numbers($offlinequiz, array($group));
$offlinequizconfig->papergray = $offlinequiz->papergray;
// Load corners from DB.
$dbcorners = $DB->get_records('offlinequiz_page_corners', array('scannedpageid' => $scannedpage->id));
$corners = array();
foreach ($dbcorners as $corner) {
$corners[] = new oq_point($corner->x, $corner->y);
}
// Initialize a page scanner.
$scanner = new offlinequiz_page_scanner($offlinequiz, $context->id, $maxquestions, $maxanswers);
// Load the stored picture file.
$sheetloaded = $scanner->load_stored_image($scannedpage->filename, $corners);
$pagenumber = $scannedpage->pagenumber;
// Make a first check.
$scanner->check_deleted();
$scanner->calibrate_and_get_group();
$scanner->get_usernumber();
$scanner->get_page();
// Necessary s.t. we can get the answer hotspots from the scanner.
$scanner->set_page($pagenumber);
$quba = question_engine::load_questions_usage_by_activity($result->usageid);
$slots = $quba->get_slots();
// Determine the slice of slots we are interested in.
// We start at the top of the page (e.g. 0, 96, etc).
$startindex = min(($pagenumber - 1) * $questionsperpage, count($slots));
// We end on the bottom of the page or when the questions are gone (e.g., 95, 105).
$endindex = min( $pagenumber * $questionsperpage, count($slots) );
// Load the choices made before from the database. There might not be any.
$choices = $DB->get_records('offlinequiz_choices', array('scannedpageid' => $scannedpage->id), 'slotnumber, choicenumber');
// Choicesdata contains the choices data from the DB indexed by slotnumber and choicenumber.
$choicesdata = array();
if (!empty($choices)) {
foreach ($choices as $choice) {
if (!isset($choicesdata[$choice->slotnumber]) || !is_array($choicesdata[$choice->slotnumber])) {
$choicesdata[$choice->slotnumber] = array();
}
$choicesdata[$choice->slotnumber][$choice->choicenumber] = $choice;
}
}
if ($sheetloaded) {
// Print image of the form sheet.
$fs = get_file_storage();
$imagefile = $fs->get_file($context->id, 'mod_offlinequiz', 'imagefiles', 0, '/', $scannedpage->filename);
// E.g. http://131.130.103.117/mod_offlinequiz/pluginfile.php/65/mod_offlinequiz/imagefiles/0/zimmer.png_1.
echo '<img name="formimage" src="' . $CFG->wwwroot . "/pluginfile.php/$context->id/mod_offlinequiz/imagefiles/0/" .
$imagefile->get_filename() .'" border="1" width="' . OQ_IMAGE_WIDTH .
'" style="position:absolute; top:0px; left:0px; display: block;">';
$answerspots = $scanner->export_hotspots_answer(OQ_IMAGE_WIDTH);
if ($options->gradedsheetfeedback) {
$questionids = offlinequiz_get_group_question_ids($offlinequiz, $group->id);
list($qsql, $params) = $DB->get_in_or_equal($questionids, SQL_PARAMS_NAMED, 'qid');
$params['offlinequizid'] = $offlinequiz->id;
$params['offlinegroupid'] = $group->id;
$sql = "SELECT q.*, ogq.maxmark
FROM {question} q,
{offlinequiz_group_questions} ogq
WHERE ogq.offlinequizid = :offlinequizid
AND ogq.offlinegroupid = :offlinegroupid
AND q.id = ogq.questionid
AND q.id $qsql";
// Load the questions.
if (!$questions = $DB->get_records_sql($sql, $params)) {
$viewurl = new moodle_url($CFG->wwwroot . '/mod/offlinequiz/view.php',
array('q' => $offlinequiz->id));
print_error('noquestionsfound', 'offlinequiz', $viewurl);
}
// Load the question type specific information.
if (!get_question_options($questions)) {
print_error('Could not load question options');
}
$questioncounter = 0;
for ($slotindex = $startindex; $slotindex < $endindex; $slotindex++) {
$slot = $slots[$slotindex];
$slotquestion = $quba->get_question($slot);
$attempt = $quba->get_question_attempt($slot);
$order = $slotquestion->get_order($attempt); // Order of the answers.
$answers = $slotquestion->answers;
// Go through all answers of the slot question.
foreach ($order as $key => $answerid) {
$hotspot = $answerspots['a-' . $questioncounter . '-' . $key];
$index = explode('-', $key);
$questionid = $slotquestion->id;
if ($answers[$answerid]->fraction > 0 and $choicesdata[$slot][$key]->value == 1) {
// The student crossed a correct answer.
echo "<img title=\"".get_string('question') . ' ' .
($slotindex + 1) . ' ' . get_string('answer') . ' ' . ($key + 1) .
"\" src=\"$CFG->wwwroot/mod/offlinequiz/pix/green.gif\" border=\"0\"" .
" id=\"a-$slotindex-$key\" style=\"position:absolute; top:" .
$hotspot->y."px; left:".$hotspot->x."px;\">";
} else if ($answers[$answerid]->fraction > 0 and $choicesdata[$slot][$key]->value == 0) {
// The student did not cross a correct answer.
echo "<img title=\"".get_string('question') . ' ' .
($slotindex + 1) . ' ' . get_string('answer') . ' ' . ($key + 1) .
"\" src=\"$CFG->wwwroot/mod/offlinequiz/pix/missing.png\" border=\"0\"" .
" id=\"a-$slotindex-$key\" style=\"position:absolute; top:".
($hotspot->y - 2) . "px; left:".($hotspot->x - 2)."px;\">";
} else if ($answers[$answerid]->fraction <= 0 and $choicesdata[$slot][$key]->value == 1) {
// The student crossed an answer that is wrong.
echo "<img title=\"".get_string('question') . ' ' .
($slotindex + 1) . ' ' . get_string('answer') . ' ' . ($key + 1) .
"\" src=\"$CFG->wwwroot/mod/offlinequiz/pix/wrong.png\" border=\"0\"" .
" id=\"a-$slotindex-$key\" style=\"position:absolute; top:" .
($hotspot->y - 2)."px; left:".($hotspot->x - 2)."px;\">";
}
}
$questioncounter++;
}
// Print info about markings.
echo "<div style=\"font-size:80%; position:absolute; top:10px; left:" . (OQ_IMAGE_WIDTH + 40) . "px; width:280px\">\n";
echo "<img src=\"$CFG->wwwroot/mod/offlinequiz/pix/green.gif\"" .
" style=\"vertical-align: text-bottom; width: 14px; height:14px;\" border=\"0\" id=\"legend-green\"> ";
echo get_string('greeniscross', 'offlinequiz').'<br/>';
echo "<img src=\"$CFG->wwwroot/mod/offlinequiz/pix/missing.png\"" .
" style=\"vertical-align: text-bottom; width: 14px; height:14px;\" border=\"0\" id=\"legend-green\"> ";
echo get_string('rediswrong', 'offlinequiz').'<br/>';
echo '</div>';
echo '<div style="position: absolute; top: 80px; width:280px; left: ' . (OQ_IMAGE_WIDTH + 40) . 'px;">';
echo '<table callpadding="4" border="1"><tr><td style="vertical-align: top;">'; // Outer table.
echo '<table cellpadding="3" style=" font-size: 80%;"><tr><td><strong>' .
get_string('question').' </strong></td><td><strong>' .
get_string('points', 'grades') . '</strong></td></tr>';
// Print questions and points in a two column table.
$middle = $startindex + round(($endindex - $startindex) / 2);
for ($slotindex = $startindex; $slotindex < $middle; $slotindex++) {
$slot = $slots[$slotindex];
$slotquestion = $quba->get_question($slot);
$attempt = $quba->get_question_attempt($slot);
$question = $questions[$slotquestion->id];
echo "<tr><td align=\"right\"><strong>" . ($slotindex + 1) . ": </strong></td>";
$mark = $attempt->get_mark();
if ($mark) {
$grade = round($mark, $offlinequiz->decimalpoints);
} else {
$grade = 0;
}
$maxgrade = $question->maxmark + 0;
echo "<td>$grade / $maxgrade</td></tr>";
}
echo "</table>"; // Inner table 1.
echo "</td><td style=\"vertical-align: top;\">";
echo '<table cellpadding="3" style=" font-size: 80%;"><tr><td><strong>' .
get_string('question').' </strong></td><td><strong>' .
get_string('points', 'grades').'</strong></td></tr>';
for ($slotindex = $middle; $slotindex < $endindex; $slotindex++) {
$slot = $slots[$slotindex];
$slotquestion = $quba->get_question($slot);
$attempt = $quba->get_question_attempt($slot);
$question = $questions[$slotquestion->id];
echo "<tr><td align=\"right\"><strong>" . ($slotindex + 1) . ": </strong></td>";
$mark = $attempt->get_mark();
if ($mark) {
$grade = round($mark, $offlinequiz->decimalpoints);
} else {
$grade = 0;
}
$maxgrade = $question->maxmark + 0;
echo "<td>$grade / $maxgrade</td></tr>";
}
if (($endindex - $middle) == 1) {
echo "<tr><td> </td><td> </td></tr>";
}
echo "</table>"; // Inner table 2.
echo '</td></tr></table>'; // Outer table.
echo "\n<br /></div>\n";
} else {
// Print hotspots for answers.
$questioncounter = 0;
for ($slotindex = $startindex; $slotindex < $endindex; $slotindex++) {
$slot = $slots[$slotindex];
$slotquestion = $quba->get_question($slot);
$attempt = $quba->get_question_attempt($slot);
$order = $slotquestion->get_order($attempt); // Order of the answers.
// Go through all answers of the slot question.
foreach ($order as $key => $notused) {
$hotspot = $answerspots['a-' . $questioncounter . '-' . $key];
if ($choicesdata[$slot][$key]->value == 1) {
echo "<img src=\"$CFG->wwwroot/mod/offlinequiz/pix/green.gif\" border=\"0\"" .
" id=\"a-$slot-$key\" style=\"position:absolute; top:".$hotspot->y."px; left:" .
$hotspot->x."px; cursor:pointer;\" onClick=\"set_item(this, $slot, $key)\">";
}
}
$questioncounter++;
}
}
}