MDL-55519 activities: mform element shows correct maxgrade.
[moodle.git] / lib / form / modgrade.php
CommitLineData
c65795d3 1<?php
6c1fd304
RT
2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
16
17
18/**
19 * Drop down form element to select the grade
20 *
21 * Contains HTML class for a drop down element to select the grade for an activity,
22 * used in mod update form
23 *
24 * @package core_form
25 * @copyright 2006 Jamie Pratt <me@jamiep.org>
26 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
27 */
28
c65795d3 29global $CFG;
30require_once "$CFG->libdir/form/select.php";
59766233
JM
31require_once("HTML/QuickForm/element.php");
32require_once($CFG->dirroot.'/lib/form/group.php');
33require_once($CFG->dirroot.'/lib/grade/grade_scale.php');
c65795d3 34
35/**
6c1fd304
RT
36 * Drop down form element to select the grade
37 *
c65795d3 38 * HTML class for a drop down element to select the grade for an activity,
39 * used in mod update form
40 *
6c1fd304
RT
41 * @package core_form
42 * @category form
43 * @copyright 2006 Jamie Pratt <me@jamiep.org>
44 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
c65795d3 45 */
d629c601
DW
46class MoodleQuickForm_modgrade extends MoodleQuickForm_group {
47
48 /** @var boolean $isupdate Is this an add or an update ? */
49 public $isupdate = false;
50
51 /** @var float $currentgrade The current grademax for the grade_item */
52 public $currentgrade = false;
53
54 /** @var boolean $hasgrades Has this grade_item got any real grades (with values) */
55 public $hasgrades = false;
56
57 /** @var boolean $canrescale Does this activity support rescaling grades? */
58 public $canrescale = false;
4a0e2e63 59
664d8be7
MN
60 /** @var int $currentscaleid The current scale id */
61 public $currentscaleid = null;
62
63 /** @var string $currentgradetype The current gradetype - can either be 'none', 'scale', or 'point' */
64 public $currentgradetype = 'none';
65
66 /** @var boolean $useratings Set to true if the activity is using ratings, false otherwise */
67 public $useratings = false;
68
69 /** @var MoodleQuickForm_select $gradetypeformelement */
70 private $gradetypeformelement;
71
72 /** @var MoodleQuickForm_select $scaleformelement */
73 private $scaleformelement;
74
75 /** @var MoodleQuickForm_text $maxgradeformelement */
76 private $maxgradeformelement;
77
c65795d3 78 /**
59766233 79 * Constructor
c65795d3 80 *
59766233
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81 * @param string $elementname Element's name
82 * @param mixed $elementlabel Label(s) for an element
d629c601
DW
83 * @param array $options Options to control the element's display. Required - must contain the following options:
84 * 'isupdate' - is this a new module or are we editing an existing one?
85 * 'currentgrade' - the current grademax in the database for this gradeitem
86 * 'hasgrades' - whether or not the grade_item has existing grade_grades
e7c71c18 87 * 'canrescale' - whether or not the activity supports rescaling grades
59766233 88 * @param mixed $attributes Either a typical HTML attribute string or an associative array
c65795d3 89 */
1a0df553 90 public function __construct($elementname = null, $elementlabel = null, $options = array(), $attributes = null) {
32fada5c 91 // TODO MDL-52313 Replace with the call to parent::__construct().
1a0df553 92 HTML_QuickForm_element::__construct($elementname, $elementlabel, $attributes);
59766233
JM
93 $this->_persistantFreeze = true;
94 $this->_appendName = true;
c65795d3 95 $this->_type = 'modgrade';
d629c601 96 $this->isupdate = !empty($options['isupdate']);
d629c601
DW
97 if (isset($options['currentgrade'])) {
98 $this->currentgrade = $options['currentgrade'];
99 }
664d8be7
MN
100 if (isset($options['currentgradetype'])) {
101 $gradetype = $options['currentgradetype'];
102 switch ($gradetype) {
103 case GRADE_TYPE_NONE :
104 $this->currentgradetype = 'none';
105 break;
106 case GRADE_TYPE_SCALE :
107 $this->currentgradetype = 'scale';
108 break;
109 case GRADE_TYPE_VALUE :
110 $this->currentgradetype = 'point';
111 break;
112 }
113 }
114 if (isset($options['currentscaleid'])) {
115 $this->currentscaleid = $options['currentscaleid'];
116 }
d629c601
DW
117 $this->hasgrades = !empty($options['hasgrades']);
118 $this->canrescale = !empty($options['canrescale']);
664d8be7 119 $this->useratings = !empty($options['useratings']);
59766233
JM
120 }
121
1a0df553
MG
122 /**
123 * Old syntax of class constructor. Deprecated in PHP7.
124 *
125 * @deprecated since Moodle 3.1
126 */
127 public function MoodleQuickForm_modgrade($elementname = null, $elementlabel = null, $options = array(), $attributes = null) {
128 debugging('Use of class name as constructor is deprecated', DEBUG_DEVELOPER);
129 self::__construct($elementname, $elementlabel, $options, $attributes);
130 }
131
59766233
JM
132 /**
133 * Create elements for this group.
134 */
135 public function _createElements() {
d629c601 136 global $COURSE, $CFG, $OUTPUT;
59766233
JM
137 $attributes = $this->getAttributes();
138 if (is_null($attributes)) {
139 $attributes = array();
140 }
141
142 $this->_elements = array();
143
144 // Create main elements
145 // We have to create the scale and point elements first, as we need their IDs.
146
147 // Grade scale select box.
148 $scales = get_scales_menu($COURSE->id);
149 $langscale = get_string('modgradetypescale', 'grades');
721e2def 150 $this->scaleformelement = $this->createFormElement('select', 'modgrade_scale', $langscale,
664d8be7
MN
151 $scales, $attributes);
152 $this->scaleformelement->setHiddenLabel = false;
153 $scaleformelementid = $this->generate_modgrade_subelement_id('modgrade_scale');
154 $this->scaleformelement->updateAttributes(array('id' => $scaleformelementid));
59766233
JM
155
156 // Maximum grade textbox.
157 $langmaxgrade = get_string('modgrademaxgrade', 'grades');
721e2def 158 $this->maxgradeformelement = $this->createFormElement('text', 'modgrade_point', $langmaxgrade, array());
664d8be7
MN
159 $this->maxgradeformelement->setHiddenLabel = false;
160 $maxgradeformelementid = $this->generate_modgrade_subelement_id('modgrade_point');
161 $this->maxgradeformelement->updateAttributes(array('id' => $maxgradeformelementid));
59766233
JM
162
163 // Grade type select box.
164 $gradetype = array(
165 'none' => get_string('modgradetypenone', 'grades'),
166 'scale' => get_string('modgradetypescale', 'grades'),
167 'point' => get_string('modgradetypepoint', 'grades'),
168 );
169 $langtype = get_string('modgradetype', 'grades');
721e2def 170 $this->gradetypeformelement = $this->createFormElement('select', 'modgrade_type', $langtype, $gradetype,
664d8be7
MN
171 $attributes, true);
172 $this->gradetypeformelement->setHiddenLabel = false;
173 $gradetypeformelementid = $this->generate_modgrade_subelement_id('modgrade_type');
174 $this->gradetypeformelement->updateAttributes(array('id' => $gradetypeformelementid));
175
176 if ($this->isupdate && $this->hasgrades) {
177 $this->gradetypeformelement->updateAttributes(array('disabled' => 'disabled'));
178 $this->scaleformelement->updateAttributes(array('disabled' => 'disabled'));
179
180 // Check box for options for processing existing grades.
181 if ($this->canrescale) {
182 $langrescalegrades = get_string('modgraderescalegrades', 'grades');
183 $choices = array();
184 $choices[''] = get_string('choose');
185 $choices['no'] = get_string('no');
186 $choices['yes'] = get_string('yes');
721e2def 187 $rescalegradesselect = $this->createFormElement('select',
664d8be7
MN
188 'modgrade_rescalegrades',
189 $langrescalegrades,
190 $choices);
191 $rescalegradesselect->setHiddenLabel = false;
192 $rescalegradesselectid = $this->generate_modgrade_subelement_id('modgrade_rescalegrades');
193 $rescalegradesselect->updateAttributes(array('id' => $rescalegradesselectid));
194 }
d629c601
DW
195 }
196
59766233 197 // Add elements.
664d8be7
MN
198 if ($this->isupdate && $this->hasgrades) {
199 // Set a message so the user knows why they can not alter the grade type or scale.
200 if ($this->currentgradetype == 'scale') {
201 $gradesexistmsg = get_string('modgradecantchangegradetyporscalemsg', 'grades');
202 } else {
203 $gradesexistmsg = get_string('modgradecantchangegradetypemsg', 'grades');
204 }
205
206 $gradesexisthtml = '<div class=\'alert\'>' . $gradesexistmsg . '</div>';
721e2def 207 $this->_elements[] = $this->createFormElement('static', 'gradesexistmsg', '', $gradesexisthtml);
664d8be7 208 }
59766233
JM
209
210 // Grade type select box.
664d8be7
MN
211 $label = html_writer::tag('label', $this->gradetypeformelement->getLabel(),
212 array('for' => $this->gradetypeformelement->getAttribute('id')));
721e2def 213 $this->_elements[] = $this->createFormElement('static', 'gradetypelabel', '', '&nbsp;'.$label);
664d8be7 214 $this->_elements[] = $this->gradetypeformelement;
721e2def 215 $this->_elements[] = $this->createFormElement('static', 'gradetypespacer', '', '<br />');
c65795d3 216
664d8be7
MN
217 // Only show the grade scale select box when applicable.
218 if (!$this->isupdate || !$this->hasgrades || $this->currentgradetype == 'scale') {
219 $label = html_writer::tag('label', $this->scaleformelement->getLabel(),
220 array('for' => $this->scaleformelement->getAttribute('id')));
721e2def 221 $this->_elements[] = $this->createFormElement('static', 'scalelabel', '', $label);
664d8be7 222 $this->_elements[] = $this->scaleformelement;
721e2def 223 $this->_elements[] = $this->createFormElement('static', 'scalespacer', '', '<br />');
664d8be7 224 }
d629c601 225
664d8be7 226 if ($this->isupdate && $this->hasgrades && $this->canrescale && $this->currentgradetype == 'point') {
d629c601 227 // We need to know how to apply any changes to maxgrade - ie to either update, or don't touch exising grades.
664d8be7
MN
228 $label = html_writer::tag('label', $rescalegradesselect->getLabel(),
229 array('for' => $rescalegradesselect->getAttribute('id')));
d629c601 230 $labelhelp = new help_icon('modgraderescalegrades', 'grades');
721e2def 231 $this->_elements[] = $this->createFormElement('static', 'scalelabel', '', $label . $OUTPUT->render($labelhelp));
d629c601 232 $this->_elements[] = $rescalegradesselect;
721e2def 233 $this->_elements[] = $this->createFormElement('static', 'scalespacer', '', '<br />');
d629c601 234 }
664d8be7
MN
235
236 // Only show the max points form element when applicable.
237 if (!$this->isupdate || !$this->hasgrades || $this->currentgradetype == 'point') {
238 $label = html_writer::tag('label', $this->maxgradeformelement->getLabel(),
239 array('for' => $this->maxgradeformelement->getAttribute('id')));
721e2def 240 $this->_elements[] = $this->createFormElement('static', 'pointlabel', '', $label);
664d8be7 241 $this->_elements[] = $this->maxgradeformelement;
721e2def 242 $this->_elements[] = $this->createFormElement('static', 'pointspacer', '', '<br />');
664d8be7 243 }
6c1fd304 244 }
c65795d3 245
246 /**
59766233
JM
247 * Calculate the output value for the element as a whole.
248 *
249 * @param array $submitvalues The incoming values from the form.
250 * @param bool $notused Not used.
251 * @return array Return value for the element, formatted like field name => value.
252 */
253 public function exportValue(&$submitvalues, $notused = false) {
254 global $COURSE;
255
256 // Get the values from all the child elements.
257 $vals = array();
258 foreach ($this->_elements as $element) {
259 $thisexport = $element->exportValue($submitvalues[$this->getName()], true);
260 if (!is_null($thisexport)) {
261 $vals += $thisexport;
262 }
263 }
264
265 $type = (isset($vals['modgrade_type'])) ? $vals['modgrade_type'] : 'none';
266 $point = (isset($vals['modgrade_point'])) ? $vals['modgrade_point'] : null;
267 $scale = (isset($vals['modgrade_scale'])) ? $vals['modgrade_scale'] : null;
d629c601 268 $rescalegrades = (isset($vals['modgrade_rescalegrades'])) ? $vals['modgrade_rescalegrades'] : null;
c3d4d3f7
DW
269
270 $return = $this->process_value($type, $scale, $point, $rescalegrades);
d629c601 271 return array($this->getName() => $return, $this->getName() . '_rescalegrades' => $rescalegrades);
59766233
JM
272 }
273
274 /**
275 * Process the value for the group based on the selected grade type, and the input for the scale and point elements.
276 *
277 * @param string $type The value of the grade type select box. Can be 'none', 'scale', or 'point'
278 * @param string|int $scale The value of the scale select box.
279 * @param string|int $point The value of the point grade textbox.
c3d4d3f7 280 * @param string $rescalegrades The value of the rescalegrades select.
59766233
JM
281 * @return int The resulting value
282 */
c3d4d3f7 283 protected function process_value($type='none', $scale=null, $point=null, $rescalegrades=null) {
59766233
JM
284 global $COURSE;
285 $val = 0;
c3d4d3f7
DW
286 if ($this->isupdate && $this->hasgrades && $this->canrescale && $this->currentgradetype == 'point' && empty($rescalegrades)) {
287 // If the maxgrade field is disabled with javascript, no value is sent with the form and mform assumes the default.
288 // If the user was forced to choose a rescale option - and they haven't - prevent any changes to the max grade.
bb0b39b8 289 return (string)unformat_float($this->currentgrade);
c3d4d3f7 290 }
59766233
JM
291 switch ($type) {
292 case 'point':
293 if ($this->validate_point($point) === true) {
294 $val = (int)$point;
295 }
296 break;
297
298 case 'scale':
299 if ($this->validate_scale($scale)) {
300 $val = (int)(-$scale);
301 }
302 break;
303 }
304 return $val;
305 }
306
307 /**
308 * Determines whether a given value is a valid scale selection.
309 *
310 * @param string|int $val The value to test.
311 * @return bool Valid or invalid
312 */
313 protected function validate_scale($val) {
314 global $COURSE;
315 $scales = get_scales_menu($COURSE->id);
316 return (!empty($val) && isset($scales[(int)$val])) ? true : false;
317 }
318
319 /**
320 * Determines whether a given value is a valid point selection.
321 *
322 * @param string|int $val The value to test.
323 * @return bool Valid or invalid
324 */
325 protected function validate_point($val) {
326 if (empty($val)) {
327 return false;
328 }
329 $maxgrade = (int)get_config('core', 'gradepointmax');
330 $isintlike = ((string)(int)$val === $val) ? true : false;
331 return ($isintlike === true && $val > 0 && $val <= $maxgrade) ? true : false;
332 }
333
334 /**
335 * Called by HTML_QuickForm whenever form event is made on this element.
c65795d3 336 *
6c1fd304
RT
337 * @param string $event Name of event
338 * @param mixed $arg event arguments
ed7605f4 339 * @param moodleform $caller calling object
6c1fd304 340 * @return mixed
c65795d3 341 */
59766233 342 public function onQuickFormEvent($event, $arg, &$caller) {
721e2def 343 $this->setMoodleForm($caller);
c65795d3 344 switch ($event) {
ed7605f4
SH
345 case 'createElement':
346 // The first argument is the name.
347 $name = $arg[0];
348
349 // Set disable actions.
350 $caller->disabledIf($name.'[modgrade_scale]', $name.'[modgrade_type]', 'neq', 'scale');
351 $caller->disabledIf($name.'[modgrade_point]', $name.'[modgrade_type]', 'neq', 'point');
d629c601 352 $caller->disabledIf($name.'[modgrade_rescalegrades]', $name.'[modgrade_type]', 'neq', 'point');
ed7605f4
SH
353
354 // Set validation rules for the sub-elements belonging to this element.
355 // A handy note: the parent scope of a closure is the function in which the closure was declared.
356 // Because of this using $this is safe despite the closures being called statically.
357 // A nasty magic hack!
664d8be7
MN
358 $checkgradetypechange = function($val) {
359 // Nothing is affected by changes to the grade type if there are no grades yet.
360 if (!$this->hasgrades) {
361 return true;
362 }
363 // Check if we are changing the grade type when grades are present.
364 if (isset($val['modgrade_type']) && $val['modgrade_type'] !== $this->currentgradetype) {
365 return false;
366 }
367 return true;
368 };
369 $checkscalechange = function($val) {
370 // Nothing is affected by changes to the scale if there are no grades yet.
371 if (!$this->hasgrades) {
372 return true;
373 }
374 // Check if we are changing the scale type when grades are present.
bdd4bed8
RT
375 // If modgrade_type is empty then use currentgradetype.
376 $gradetype = isset($val['modgrade_type']) ? $val['modgrade_type'] : $this->currentgradetype;
377 if ($gradetype === 'scale') {
664d8be7
MN
378 if (isset($val['modgrade_scale']) && ($val['modgrade_scale'] !== $this->currentscaleid)) {
379 return false;
380 }
381 }
382 return true;
383 };
384 $checkmaxgradechange = function($val) {
385 // Nothing is affected by changes to the max grade if there are no grades yet.
386 if (!$this->hasgrades) {
387 return true;
388 }
389 // If we are not using ratings we can change the max grade.
390 if (!$this->useratings) {
391 return true;
392 }
393 // Check if we are changing the max grade if we are using ratings and there is a grade.
bdd4bed8
RT
394 // If modgrade_type is empty then use currentgradetype.
395 $gradetype = isset($val['modgrade_type']) ? $val['modgrade_type'] : $this->currentgradetype;
396 if ($gradetype === 'point') {
664d8be7
MN
397 if (isset($val['modgrade_point']) &&
398 grade_floats_different($this->currentgrade, $val['modgrade_point'])) {
399 return false;
400 }
401 }
402 return true;
403 };
ed7605f4
SH
404 $checkmaxgrade = function($val) {
405 // Closure to validate a max points value. See the note above about scope if this confuses you.
bdd4bed8
RT
406 // If modgrade_type is empty then use currentgradetype.
407 $gradetype = isset($val['modgrade_type']) ? $val['modgrade_type'] : $this->currentgradetype;
408 if ($gradetype === 'point') {
409 if (isset($val['modgrade_point'])) {
410 return $this->validate_point($val['modgrade_point']);
ed7605f4 411 }
ed7605f4
SH
412 }
413 return true;
414 };
415 $checkvalidscale = function($val) {
416 // Closure to validate a scale value. See the note above about scope if this confuses you.
bdd4bed8
RT
417 // If modgrade_type is empty then use currentgradetype.
418 $gradetype = isset($val['modgrade_type']) ? $val['modgrade_type'] : $this->currentgradetype;
419 if ($gradetype === 'scale') {
420 if (isset($val['modgrade_scale'])) {
421 return $this->validate_scale($val['modgrade_scale']);
ed7605f4 422 }
ed7605f4
SH
423 }
424 return true;
425 };
426
e7c71c18
DW
427 $checkrescale = function($val) {
428 // Nothing is affected by changes to grademax if there are no grades yet.
429 if (!$this->isupdate || !$this->hasgrades || !$this->canrescale) {
430 return true;
431 }
432 // Closure to validate a scale value. See the note above about scope if this confuses you.
bdd4bed8
RT
433 // If modgrade_type is empty then use currentgradetype.
434 $gradetype = isset($val['modgrade_type']) ? $val['modgrade_type'] : $this->currentgradetype;
435 if ($gradetype === 'point' && isset($val['modgrade_point'])) {
e7c71c18
DW
436 // Work out if the value was actually changed in the form.
437 if (grade_floats_different($this->currentgrade, $val['modgrade_point'])) {
438 if (empty($val['modgrade_rescalegrades'])) {
439 // This was an "edit", the grademax was changed and the process existing setting was not set.
440 return false;
441 }
442 }
443 }
444 return true;
445 };
446
664d8be7
MN
447 $cantchangegradetype = get_string('modgradecantchangegradetype', 'grades');
448 $cantchangemaxgrade = get_string('modgradecantchangeratingmaxgrade', 'grades');
ed7605f4
SH
449 $maxgradeexceeded = get_string('modgradeerrorbadpoint', 'grades', get_config('core', 'gradepointmax'));
450 $invalidscale = get_string('modgradeerrorbadscale', 'grades');
664d8be7 451 $cantchangescale = get_string('modgradecantchangescale', 'grades');
e7c71c18 452 $mustchooserescale = get_string('mustchooserescaleyesorno', 'grades');
ed7605f4
SH
453 // When creating the rules the sixth arg is $force, we set it to true because otherwise the form
454 // will attempt to validate the existence of the element, we don't want this because the element
455 // is being created right now and doesn't actually exist as a registered element yet.
664d8be7
MN
456 $caller->addRule($name, $cantchangegradetype, 'callback', $checkgradetypechange, 'server', false, true);
457 $caller->addRule($name, $cantchangemaxgrade, 'callback', $checkmaxgradechange, 'server', false, true);
ed7605f4
SH
458 $caller->addRule($name, $maxgradeexceeded, 'callback', $checkmaxgrade, 'server', false, true);
459 $caller->addRule($name, $invalidscale, 'callback', $checkvalidscale, 'server', false, true);
664d8be7 460 $caller->addRule($name, $cantchangescale, 'callback', $checkscalechange, 'server', false, true);
e7c71c18 461 $caller->addRule($name, $mustchooserescale, 'callback', $checkrescale, 'server', false, true);
ed7605f4
SH
462
463 break;
464
59766233 465 case 'updateValue':
ed7605f4
SH
466 // As this is a group element with no value of its own we are only interested in situations where the
467 // default value or a constant value are being provided to the actual element.
468 // In this case we expect an int that is going to translate to a scale if negative, or to max points
469 // if positive.
470
664d8be7
MN
471 // Set the maximum points field to disabled if the rescale option has not been chosen and there are grades.
472 $caller->disabledIf($this->getName() . '[modgrade_point]', $this->getName() .
473 '[modgrade_rescalegrades]', 'eq', '');
474
ed7605f4 475 // A constant value should be given as an int.
4ca17b63 476 // The default value should be an int and be either $CFG->gradepointdefault or whatever was set in set_data().
59766233
JM
477 $value = $this->_findValue($caller->_constantValues);
478 if (null === $value) {
4ca17b63
MG
479 if ($caller->isSubmitted() && $this->_findValue($caller->_submitValues) !== null) {
480 // Submitted values are array, one value for each individual element in this group.
481 // When there is submitted data let parent::onQuickFormEvent() process it.
ed7605f4 482 break;
59766233 483 }
ed7605f4 484 $value = $this->_findValue($caller->_defaultValues);
c65795d3 485 }
59766233 486
ed7605f4
SH
487 if (!is_null($value) && !is_scalar($value)) {
488 // Something unexpected (likely an array of subelement values) has been given - this will be dealt
489 // with somewhere else - where exactly... likely the subelements.
490 debugging('An invalid value (type '.gettype($value).') has arrived at '.__METHOD__, DEBUG_DEVELOPER);
491 break;
492 }
59766233
JM
493
494 // Set element state for existing data.
ed7605f4
SH
495 // This is really a pretty hacky thing to do, when data is being set the group element is called
496 // with the data first and the subelements called afterwards.
497 // This means that the subelements data (inc const and default values) can be overridden by form code.
498 // So - when we call this code really we can't be sure that will be the end value for the element.
59766233
JM
499 if (!empty($this->_elements)) {
500 if (!empty($value)) {
501 if ($value < 0) {
664d8be7
MN
502 $this->gradetypeformelement->setValue('scale');
503 $this->scaleformelement->setValue(($value * -1));
59766233 504 } else if ($value > 0) {
664d8be7 505 $this->gradetypeformelement->setValue('point');
6965ffe0
AG
506 $maxvalue = !empty($this->currentgrade) ? (string)unformat_float($this->currentgrade) : $value;
507 $this->maxgradeformelement->setValue($maxvalue);
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508 }
509 } else {
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510 $this->gradetypeformelement->setValue('none');
511 $this->maxgradeformelement->setValue('');
59766233 512 }
c65795d3 513 }
59766233 514 break;
c65795d3 515 }
59766233 516
ed7605f4 517 // Always let the parent do its thing!
c65795d3 518 return parent::onQuickFormEvent($event, $arg, $caller);
519 }
520
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521 /**
522 * Generates the id attribute for the subelement of the modgrade group.
523 *
524 * Uses algorithm similar to what {@link HTML_QuickForm_element::_generateId()}
525 * does but takes the name of the wrapping modgrade group into account.
526 *
527 * @param string $subname the name of the HTML_QuickForm_element in this modgrade group
528 * @return string
529 */
530 protected function generate_modgrade_subelement_id($subname) {
531 $gid = str_replace(array('[', ']'), array('_', ''), $this->getName());
532 return clean_param('id_'.$gid.'_'.$subname, PARAM_ALPHANUMEXT);
533 }
c65795d3 534}