Annotation of /contrib/plugins/grade/report/stats/lib.php

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1 :	dservos	1.1	<?php
2 :	dservos	1.2	///////////////////////////////////////////////////////////////////////////
3 :			// //
4 :			// NOTICE OF COPYRIGHT //
5 :			// //
6 :			// Moodle - Modular Object-Oriented Dynamic Learning Environment //
7 :			// http://moodle.org //
8 :			// //
9 :			// Copyright (C) 1999 onwards Martin Dougiamas http://moodle.com //
10 :			// //
11 :			// This program is free software; you can redistribute it and/or modify //
12 :			// it under the terms of the GNU General Public License as published by //
13 :			// the Free Software Foundation; either version 2 of the License, or //
14 :			// (at your option) any later version. //
15 :			// //
16 :			// This program is distributed in the hope that it will be useful, //
17 :			// but WITHOUT ANY WARRANTY; without even the implied warranty of //
18 :			// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
19 :			// GNU General Public License for more details: //
20 :			// //
21 :			// http://www.gnu.org/copyleft/gpl.html //
22 :			// //
23 :			///////////////////////////////////////////////////////////////////////////
24 :	dservos	1.1
25 :			/**
26 :			* File in which the grade_report_stats class is defined.
27 :	dservos	1.2	* @package gradebook
28 :	dservos	1.1	*/
29 :
30 :			require_once($CFG->dirroot . '/grade/report/lib.php');
31 :			require_once($CFG->libdir.'/tablelib.php');
32 :	dservos	1.2
33 :			foreach (glob($CFG->dirroot . '/grade/report/stats/statistics/stat_*.php') as $filename) {
34 :			require_once($filename);
35 :			}
36 :	dservos	1.1
37 :			/**
38 :			* Class providing the API for the stats report, including harvesters,
39 :			* reports, and adaptor methods for turing grades in to statistics.
40 :			* @uses grade_report
41 :			* @package gradebook
42 :			*/
43 :			class grade_report_stats extends grade_report {
44 :			/**
45 :			* Capability to view hidden items.
46 :	dservos	1.2	* @var bool $canviewhidden
47 :	dservos	1.1	*/
48 :			private $canviewhidden;
49 :
50 :			/**
51 :			* Grade objects of users in the course
52 :			* @var array $grades
53 :			*/
54 :	dservos	1.2	private $grades = array();
55 :	dservos	1.1
56 :			/**
57 :			* Array of users final grades affter filtered based on
58 :			* settings.
59 :			* @var array $finalgrades
60 :			*/
61 :	dservos	1.2	private $finalgrades = array();
62 :	dservos	1.1
63 :			/**
64 :			* The value returned from each statistic.
65 :			* @var array $reportedstats
66 :			*/
67 :	dservos	1.2	private $reportedstats = array();
68 :	dservos	1.1
69 :			/**
70 :			* The html of the report to output.
71 :			* @var string $html
72 :			*/
73 :			public $html;
74 :
75 :			/**
76 :			* The table class used to make the html of the report.
77 :			* @var object $table
78 :			*/
79 :			private $table;
80 :	dservos	1.2
81 :			/**
82 :			* Array of clases that extend stats witch have the logic to
83 :			* generate the statstics.
84 :			* @var array $stats
85 :			*/
86 :	dservos	1.5	private static $stats = array();
87 :	dservos	1.1
88 :			/**
89 :			* Constructor. Initialises grade_tree, sets up group, baseurl
90 :			* and pbarurl.
91 :			* @param int $courseid the coures id for the report
92 :			* @param object $gpr grade plugin tracking object
93 :			* @context string $context
94 :			*/
95 :			public function __construct($courseid, $gpr, $context) {
96 :			global $CFG;
97 :			parent::__construct($courseid, $gpr, $context, null);
98 :
99 :			$this->canviewhidden = has_capability('moodle/grade:viewhidden', get_context_instance(CONTEXT_COURSE, $this->course->id));
100 :
101 :			/// Set up urls
102 :			$this->baseurl = 'index.php?id=' . $this->courseid;
103 :			$this->pbarurl = 'index.php?id=' . $this->courseid;
104 :
105 :			/// Set the position of the aggregation categorie based on pref
106 :			$switch = $this->get_pref('stats', 'aggregationposition');
107 :			if ($switch == '' && isset($CFG->grade_aggregationposition)) {
108 :			$switch = grade_get_setting($this->courseid, 'aggregationposition', $CFG->grade_aggregationposition);
109 :			}
110 :
111 :			/// Build grade tree
112 :			$this->gtree = new grade_tree($this->courseid, false, $switch);
113 :
114 :			/// Set up Groups
115 :			if ($this->get_pref('stats', 'showgroups') || is_null($this->get_pref('stats', 'showgroups'))) {
116 :	dservos	1.6	$this->setup_groups();
117 :	dservos	1.1	}
118 :	dservos	1.2
119 :	dservos	1.6	/// Load stats classes from ./statistics
120 :	dservos	1.2	$this->load_stats();
121 :	dservos	1.1	}
122 :
123 :	dservos	1.2	/**
124 :			* Load all the stats classes into $stats.
125 :			* Looks in /statistics and trys to make an instence of any
126 :			* class that is in a file that starts with stats_ and extends
127 :			* stats directly.
128 :			* @param bool $return if true return stats array, else store in $this->stats
129 :			* @returns array array of clases that extend stats
130 :			*/
131 :			private function load_stats($return=false) {
132 :			global $CFG;
133 :
134 :			$stats = array();
135 :
136 :			foreach (glob($CFG->dirroot . '/grade/report/stats/statistics/stat_*.php') as $path) {
137 :			$filename = substr(basename($path, '.php'), 5);
138 :
139 :			if(class_exists($filename) && get_parent_class($class = new $filename) == 'stats' ) {
140 :			$stats[$filename] = $class;
141 :			}
142 :			}
143 :
144 :			if($return) {
145 :			return $stats;
146 :			} else {
147 :	dservos	1.5	grade_report_stats::$stats = $stats;
148 :	dservos	1.2	}
149 :			}
150 :
151 :			/**
152 :			* Returns the current stats being used in the report or if no stats are
153 :			* set, it returns the stats as whould be loaded by load_stats.
154 :			* @returns array array of classes that extend stats
155 :			*/
156 :			public function get_stats() {
157 :	dservos	1.5	if(!isset(grade_report_stats::$stats) || is_null(grade_report_stats::$stats) || empty(grade_report_stats::$stats)) {
158 :	dservos	1.2	return grade_report_stats::load_stats(true);
159 :			} else {
160 :	dservos	1.5	return grade_report_stats::$stats;
161 :	dservos	1.2	}
162 :			}
163 :
164 :			/// Added to keep grade_report happy
165 :	dservos	1.1	public function process_data($data){}
166 :			public function process_action($target, $action){}
167 :
168 :			/**
169 :			* Based on load user function from grader report.
170 :			* Pulls out the userids of the users to be used in the stats.
171 :			* @return array array of user ids to use in stats
172 :			*/
173 :			public function load_users() {
174 :			global $CFG, $DB;
175 :
176 :			if(isset($DB) && !is_null($DB)) {
177 :			$params = array();
178 :			list($usql, $gbr_params) = $DB->get_in_or_equal(explode(',', $this->gradebookroles));
179 :
180 :			$sql = "SELECT u.id
181 :			FROM {user} u
182 :			JOIN {role_assignments} ra ON u.id = ra.userid
183 :			$this->groupsql
184 :			WHERE ra.roleid $usql
185 :			$this->groupwheresql
186 :			AND ra.contextid ".get_related_contexts_string($this->context);
187 :
188 :			$params = array_merge($gbr_params, $this->groupwheresql_params);
189 :			$this->users = $DB->get_records_sql($sql, $params);
190 :			} else {
191 :			$sql = "SELECT u.id, u.firstname, u.lastname, u.imagealt, u.picture, u.idnumber
192 :			FROM {$CFG->prefix}user u
193 :			JOIN {$CFG->prefix}role_assignments ra ON u.id = ra.userid
194 :			$this->groupsql
195 :			WHERE ra.roleid in ($this->gradebookroles)
196 :			$this->groupwheresql
197 :			AND ra.contextid ".get_related_contexts_string($this->context);
198 :
199 :			$this->users = get_records_sql($sql);
200 :			}
201 :
202 :			if (empty($this->users)) {
203 :			$this->userselect = '';
204 :			$this->users = array();
205 :	dservos	1.3	$this->userselect_params = array();
206 :	dservos	1.1	} else {
207 :			if(isset($DB) && !is_null($DB)) {
208 :			list($usql, $params) = $DB->get_in_or_equal(array_keys($this->users));
209 :			$this->userselect = "AND g.userid $usql";
210 :			$this->userselect_params = $params;
211 :			}else{
212 :			$this->userselect = 'AND g.userid in ('.implode(',', array_keys($this->users)).')';
213 :			}
214 :			}
215 :
216 :			return $this->users;
217 :			}
218 :
219 :			/**
220 :			* Encode an array of stat's data in to a stirng so it can
221 :			* be put in the get part of a url.
222 :			* @param arrray $array array of data to encode
223 :			* @param object $item grade_item to use to fromat stats
224 :			* @param object $stat stats object to use to format stats
225 :			* @return string encoded string
226 :			*/
227 :	dservos	1.2	private function encode_array(array $array, $item, $stat) {
228 :	dservos	1.1	$string = '';
229 :
230 :			/// Encode each elment by puting a delimiter and base64 encoding it.
231 :			foreach($array as $id=>$data) {
232 :			$string .= addslashes(grade_format_gradevalue($data, $item, true, $stat->displaytype, $stat->decimals)) . '"';
233 :			}
234 :			return strtr(base64_encode($string), '+/=', '-_,');
235 :			}
236 :
237 :			/**
238 :			* Harvest the grades from the data base and build the finalgrades array.
239 :			* Filters out hidden, locked and null grades based on users settings.
240 :			* Partly based on grader reports load_final_grades function.
241 :			*/
242 :			public function harvest_data() {
243 :			global $CFG, $DB;
244 :
245 :	dservos	1.2	$params = array();
246 :
247 :	dservos	1.1	if(isset($DB) && !is_null($DB)) {
248 :			$params = array_merge(array($this->courseid), $this->userselect_params);
249 :
250 :			/// please note that we must fetch all grade_grades fields if we want to contruct grade_grade object from it!
251 :			$sql = "SELECT g.*
252 :			FROM {grade_items} gi,
253 :			{grade_grades} g
254 :			WHERE g.itemid = gi.id AND gi.courseid = ? {$this->userselect}";
255 :
256 :			$grades = $DB->get_records_sql($sql, $params);
257 :			} else {
258 :			/// please note that we must fetch all grade_grades fields if we want to contruct grade_grade object from it!
259 :			$sql = "SELECT g.*
260 :			FROM {$CFG->prefix}grade_items gi,
261 :			{$CFG->prefix}grade_grades g
262 :			WHERE g.itemid = gi.id AND gi.courseid = {$this->courseid} {$this->userselect}";
263 :
264 :			$grades = get_records_sql($sql);
265 :			}
266 :
267 :			$userids = array_keys($this->users);
268 :
269 :			if ($grades) {
270 :			foreach ($grades as $graderec) {
271 :			if (in_array($graderec->userid, $userids) and array_key_exists($graderec->itemid, $this->gtree->items)) { // some items may not be present!!
272 :			$this->grades[$graderec->itemid][$graderec->userid] = new grade_grade($graderec, false);
273 :			$this->grades[$graderec->itemid][$graderec->userid]->grade_item =& $this->gtree->items[$graderec->itemid]; // db caching
274 :			}
275 :			}
276 :			}
277 :
278 :			/// prefil grades that do not exist yet
279 :			foreach ($userids as $userid) {
280 :			foreach ($this->gtree->items as $itemid=>$unused) {
281 :			if (!isset($this->grades[$itemid][$userid])) {
282 :			$this->grades[$itemid][$userid] = new grade_grade();
283 :			$this->grades[$itemid][$userid]->itemid = $itemid;
284 :			$this->grades[$itemid][$userid]->userid = $userid;
285 :			$this->grades[$itemid][$userid]->grade_item =& $this->gtree->items[$itemid]; // db caching
286 :			}
287 :			}
288 :			}
289 :
290 :			$this->finalgrades = array();
291 :
292 :			/// Build finalgrades array and filliter out unwanted grades.
293 :			foreach ($this->gtree->items as $id=>$item) {
294 :			if(($item->gradetype == GRADE_TYPE_SCALE && ($this->get_pref('stats', 'showscaleitems') || is_null($this->get_pref('stats', 'showscaleitems'))))
295 :			|| ($item->gradetype == GRADE_TYPE_VALUE && ($this->get_pref('stats', 'showvalueitems') || is_null($this->get_pref('stats', 'showvalueitems'))))) {
296 :			$this->finalgrades[$id] = array();
297 :			$i = 0;
298 :
299 :			if(isset($this->grades[$id]) && !is_null($this->grades[$id])) {
300 :			foreach ($this->grades[$id] as $grade) {
301 :	dservos	1.6	if( (($grade->is_hidden() && $this->canviewhidden && ($this->get_pref('stats', 'usehidden') || is_null($this->get_pref('stats', 'usehidden')))) || !$grade->is_hidden())
302 :	dservos	1.1	&& (($grade->is_locked() && ($this->get_pref('stats', 'uselocked') || is_null($this->get_pref('stats', 'uselocked')))) || !$grade->is_locked())) {
303 :			if($this->get_pref('stats', 'incompleasmin') && is_null($grade->finalgrade)) {
304 :			$this->finalgrades[$id][$i] = $item->grademin;
305 :			$i++;
306 :			} elseif(!is_null($grade->finalgrade)) {
307 :			$this->finalgrades[$id][$i] = $grade->finalgrade;
308 :			$i++;
309 :			}
310 :			}
311 :			}
312 :			}
313 :			}
314 :			}
315 :			}
316 :
317 :			/**
318 :			* Runs grades for each item threw the report functions
319 :			* of each stats class in $stats and stores the values in
320 :			* reportedstats.
321 :			*/
322 :			public function report_data() {
323 :			$this->reportedstats = array();
324 :
325 :	dservos	1.5	foreach(grade_report_stats::$stats as $name=>$stat) {
326 :	dservos	1.6	if(($stat->capability == null || has_capability($stat->capability, $this->context)) && ($this->get_pref('stats', $name) || is_null($this->get_pref('stats', $name)))) {
327 :	dservos	1.1	$this->reportedstats[$name] = array();
328 :
329 :			foreach($this->finalgrades as $itemid=>$item) {
330 :			sort($item);
331 :			if(count($item) > 0) {
332 :			$this->reportedstats[$name][$itemid] = $stat->report_data($item, $this->gtree->items[$itemid]);
333 :			} else {
334 :			$this->reportedstats[$name][$itemid] = null;
335 :			}
336 :			}
337 :			}
338 :			}
339 :			}
340 :
341 :			/**
342 :			* Take the reported data and adapt it in to HTML to output.
343 :			* HTML is stored in html.
344 :			* TODO: Deal with tables growing to wide.
345 :			* TODO: Make it look nice.
346 :			*/
347 :	dservos	1.3	public function adapt_data($printerversion = false) {
348 :	dservos	1.2	global $CFG;
349 :	dservos	1.1
350 :	dservos	1.3	$inverted = $this->get_pref('stats', 'showinverted');
351 :
352 :	dservos	1.1	/// Set up table arrays
353 :			$tablecolumns = array('statistic');
354 :			$tableheaders = array($this->get_lang_string('statistic', 'gradereport_stats'));
355 :
356 :			/// Loop threw items and build arrays
357 :	dservos	1.3	if ($inverted) {
358 :			if($this->get_pref('stats', 'showranges')) {
359 :			array_push($tablecolumns, 'range');
360 :			array_push($tableheaders, $this->get_lang_string('range', 'gradereport_stats'));
361 :			}
362 :
363 :			foreach($this->reportedstats as $name=>$data) {
364 :			array_push($tablecolumns, $name);
365 :	dservos	1.5	array_push($tableheaders, grade_report_stats::$stats[$name]->name);
366 :	dservos	1.3	}
367 :
368 :			if($this->get_pref('stats', 'shownumgrades')) {
369 :			array_push($tablecolumns, 'num_grades');
370 :			array_push($tableheaders, $this->get_lang_string('num_grades', 'gradereport_stats'));
371 :			}
372 :			} else {
373 :			/// Set up range column and number of grades column
374 :			$ranges = array(format_text('<strong>' . $this->get_lang_string('range', 'gradereport_stats') . '</strong>', FORMAT_HTML));
375 :			$numgrades = array(format_text('<strong>' . $this->get_lang_string('num_grades', 'gradereport_stats') . '</strong>', FORMAT_HTML));
376 :
377 :			foreach($this->finalgrades as $itemid=>$grades) {
378 :			array_push($tablecolumns, $itemid);
379 :			array_push($tableheaders, format_text($this->gtree->items[$itemid]->get_name(), FORMAT_HTML));
380 :			array_push($ranges, format_text('<strong>' . grade_format_gradevalue($this->gtree->items[$itemid]->grademin, $this->gtree->items[$itemid], true) . '-' . grade_format_gradevalue($this->gtree->items[$itemid]->grademax, $this->gtree->items[$itemid], true) . '</strong>' , FORMAT_HTML));
381 :			array_push($numgrades, format_text(count($grades), FORMAT_HTML));
382 :			}
383 :	dservos	1.1	}
384 :
385 :			/// Set up flexible table
386 :			$this->table = new flexible_table('grade-report-stats-' . $this->courseid);
387 :			$this->table->define_columns($tablecolumns);
388 :	dservos	1.3	$this->table->define_headers($tableheaders);
389 :			if ($printerversion) {
390 :			$this->table->collapsible(false);
391 :			$this->table->set_attribute('cellspacing', '1');
392 :			$this->table->set_attribute('border', '1');
393 :			} else {
394 :			$this->table->define_baseurl($this->baseurl);
395 :			$this->table->collapsible(true);
396 :			$this->table->set_attribute('cellspacing', '1');
397 :			$this->table->set_attribute('id', 'stats-grade');
398 :			$this->table->set_attribute('class', 'grade-report-stats gradestable flexible');
399 :			}
400 :	dservos	1.1	$this->table->setup();
401 :
402 :			/// If ranges are being shown add them to the table
403 :	dservos	1.3	if(!$inverted){
404 :			if ($this->get_pref('stats', 'showranges')){
405 :			$this->table->add_data($ranges);
406 :			$this->table->add_separator();
407 :			}
408 :	dservos	1.1	}
409 :
410 :			/// Loop threw all the reported data and format it in to cells
411 :			/// If stat retured an array of values display the elements or
412 :			/// make a link to a popup with the data in it.
413 :	dservos	1.3	if($inverted) {
414 :			foreach($this->finalgrades as $itemid=>$grades) {
415 :			$item = $this->gtree->items[$itemid];
416 :			$row = array(format_text('<strong>' . $item->get_name() . '</strong>' , FORMAT_HTML));
417 :
418 :			if($this->get_pref('stats', 'showranges')) {
419 :			array_push($row, format_text('<strong>' . grade_format_gradevalue($item->grademin, $item, true) . '-' . grade_format_gradevalue($item->grademax, $item, true) . '</strong>' , FORMAT_HTML));
420 :			}
421 :	dservos	1.1
422 :	dservos	1.3	foreach($this->reportedstats as $name=>$data) {
423 :			$stat = $data[$itemid];
424 :
425 :			if(!is_array($stat)) {
426 :	dservos	1.5	array_push($row, format_text(grade_format_gradevalue($stat, $item, true, grade_report_stats::$stats[$name]->displaytype, grade_report_stats::$stats[$name]->decimals), FORMAT_HTML));
427 :	dservos	1.3	} else {
428 :			$statstring = "";
429 :	dservos	1.1
430 :	dservos	1.3	for($i = 0; $i < 2; $i++) {
431 :			if($i >= count($stat)) {
432 :			break;
433 :			}
434 :	dservos	1.5	$statstring .= grade_format_gradevalue($stat[$i], $item, true, grade_report_stats::$stats[$name]->displaytype, grade_report_stats::$stats[$name]->decimals) . ', ';
435 :	dservos	1.3	}
436 :
437 :			if($i < count($stat)) {
438 :			if(!$printerversion) {
439 :	dservos	1.5	$statstring = "<a href=\"#\" onClick=\"javascript:window.open('{$CFG->wwwroot}/grade/report/stats/arrayview.php?id={$this->courseid}&data={$this->encode_array($stat, $item, grade_report_stats::$stats[$name])}','{$this->get_lang_string('moredata', 'gradereport_stats')}','width=300,height=500,menubar=no,status=no,location=no,directories=no,toolbar=no,scrollbars=yes');\">". format_text($statstring, FORMAT_HTML) . '....</a>';
440 :	dservos	1.3	} else {
441 :			$statstring .= '...';
442 :			}
443 :			} else {
444 :			$statstring = substr($statstring, 0, strlen($statstring) - 2);
445 :	dservos	1.1	}
446 :	dservos	1.3	array_push($row, $statstring);
447 :	dservos	1.1	}
448 :	dservos	1.3	}
449 :
450 :			if($this->get_pref('stats', 'shownumgrades')) {
451 :			array_push($row, format_text(count($grades), FORMAT_HTML));
452 :			}
453 :
454 :			$this->table->add_data($row);
455 :			}
456 :			} else {
457 :			foreach($this->reportedstats as $name=>$data) {
458 :	dservos	1.5	$row = array(format_text('<strong>' . grade_report_stats::$stats[$name]->name . '</strong>', FORMAT_HTML));
459 :	dservos	1.3
460 :			foreach($data as $itemid=>$stat) {
461 :			if(!is_array($stat)) {
462 :	dservos	1.5	array_push($row, format_text(grade_format_gradevalue($stat, $this->gtree->items[$itemid], true, grade_report_stats::$stats[$name]->displaytype, grade_report_stats::$stats[$name]->decimals), FORMAT_HTML));
463 :	dservos	1.3	} else {
464 :			$statstring = "";
465 :
466 :			for($i = 0; $i < 2; $i++) {
467 :			if($i >= count($stat)) {
468 :			break;
469 :			}
470 :	dservos	1.5	$statstring .= grade_format_gradevalue($stat[$i], $this->gtree->items[$itemid], true, grade_report_stats::$stats[$name]->displaytype, grade_report_stats::$stats[$name]->decimals) . ', ';
471 :	dservos	1.3	}
472 :	dservos	1.1
473 :	dservos	1.3	if($i < count($stat)) {
474 :			if(!$printerversion) {
475 :	dservos	1.5	$statstring = "<a href=\"#\" onClick=\"javascript:window.open('{$CFG->wwwroot}/grade/report/stats/arrayview.php?id={$this->courseid}&data={$this->encode_array($stat, $this->gtree->items[$itemid], grade_report_stats::$stats[$name])}','{$this->get_lang_string('moredata', 'gradereport_stats')}','width=300,height=500,menubar=no,status=no,location=no,directories=no,toolbar=no,scrollbars=yes');\">". format_text($statstring, FORMAT_HTML) . '....</a>';
476 :	dservos	1.3	} else {
477 :			$statstring .= '...';
478 :			}
479 :			} else {
480 :			$statstring = substr($statstring, 0, strlen($statstring) - 2);
481 :			}
482 :			array_push($row, $statstring);
483 :	dservos	1.1	}
484 :			}
485 :	dservos	1.3	$this->table->add_data($row);
486 :	dservos	1.1	}
487 :			}
488 :
489 :			/// If the number of grades is being shown add it to the table.
490 :	dservos	1.3	if(!$inverted) {
491 :			if ($this->get_pref('stats', 'shownumgrades')){
492 :			$this->table->add_separator();
493 :			$this->table->add_data($numgrades);
494 :			}
495 :	dservos	1.1	}
496 :
497 :			/// Build html
498 :			ob_start();
499 :			if($this->currentgroup == 0) {
500 :	dservos	1.2	echo format_text('<strong>Group:</strong> All participants', FORMAT_HTML);
501 :	dservos	1.1	} else {
502 :	dservos	1.2	echo format_text('<strong>Group:</strong> ' . groups_get_group_name($this->currentgroup), FORMAT_HTML);
503 :	dservos	1.1	}
504 :			$this->table->print_html();
505 :			$this->html = ob_get_clean();
506 :			}
507 :
508 :			/**
509 :			* Builds HTML for toggles on top of report.
510 :			* Based on grader report get_toggles_html
511 :			* @return string html code for toggles.
512 :			*/
513 :			public function get_toggles_html() {
514 :			global $CFG, $USER;
515 :
516 :			$html = '<div id="stats-report-toggles" style="vertical-align: text-top; text-align: center;">';
517 :			$html .= $this->print_toggle('numgrades', true);
518 :			$html .= $this->print_toggle('groups', true);
519 :			$html .= $this->print_toggle('ranges', true);
520 :	dservos	1.3	$html .= $this->print_toggle('inverted', true);
521 :	dservos	1.1	$html .= '</div>';
522 :
523 :			return $html;
524 :			}
525 :
526 :			/**
527 :			* Builds HTML for each individual toggle.
528 :			* Based on grader report print_toggle
529 :			* @param string $type The toggle type.
530 :			* @param bool $return Wheather ro return the HTML or print it.
531 :			*/
532 :			private function print_toggle($type, $return=false) {
533 :			global $CFG;
534 :
535 :			$icons = array('eyecons' => 't/hide.gif',
536 :			'numgrades' => 't/grades.gif',
537 :			'calculations' => 't/calc.gif',
538 :			'locks' => 't/lock.gif',
539 :			'averages' => 't/mean.gif',
540 :	dservos	1.3	'inverted' => 't/switch_whole.gif',
541 :	dservos	1.1	'nooutcomes' => 't/outcomes.gif');
542 :
543 :			$pref_name = 'grade_report_statsshow' . $type;
544 :
545 :			if (array_key_exists($pref_name, $CFG)) {
546 :			$show_pref = get_user_preferences($pref_name, $CFG->$pref_name);
547 :			} else {
548 :			$show_pref = get_user_preferences($pref_name);
549 :			}
550 :
551 :			$strshow = $this->get_lang_string('show' . $type, 'gradereport_stats');
552 :			$strhide = $this->get_lang_string('hide' . $type, 'gradereport_stats');
553 :
554 :			$show_hide = 'show';
555 :			$toggle_action = 1;
556 :
557 :			if ($show_pref) {
558 :			$show_hide = 'hide';
559 :			$toggle_action = 0;
560 :			}
561 :
562 :			if (array_key_exists($type, $icons)) {
563 :			$image_name = $icons[$type];
564 :			} else {
565 :			$image_name = "t/$type.gif";
566 :			}
567 :
568 :			$string = ${'str' . $show_hide};
569 :
570 :			$img = '<img src="'.$CFG->pixpath.'/'.$image_name.'" class="iconsmall" alt="'
571 :			.$string.'" title="'.$string.'" />'. "\n";
572 :
573 :			$retval = $img . '<a href="' . $this->baseurl . "&amp;toggle=$toggle_action&amp;toggle_type=$type\">"
574 :	dservos	1.2	. format_text($string, FORMAT_HTML) . '</a> ';
575 :	dservos	1.1
576 :			if ($return) {
577 :			return $retval;
578 :			} else {
579 :			echo $retval;
580 :			}
581 :			}
582 :			}
583 :			?>

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