mirror of
https://github.com/moodle/moodle.git
synced 2025-03-09 18:30:03 +01:00
93 lines
3.3 KiB
PHP
93 lines
3.3 KiB
PHP
<?php // $Id$
|
|
include '../../../../config.php';
|
|
include $CFG->dirroot."/lib/graphlib.php";
|
|
include $CFG->dirroot."/mod/quiz/report/reportlib.php";
|
|
|
|
$quizid = required_param('id', PARAM_INT);
|
|
|
|
$quiz = get_record('quiz', 'id', $quizid);
|
|
$course = get_record('course', 'id', $quiz->course);
|
|
require_login($course);
|
|
$cm = get_coursemodule_from_instance('quiz', $quizid);
|
|
$currentgroup = groups_get_activity_group($cm);
|
|
|
|
$modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
|
|
require_capability('mod/quiz:viewreports', $modcontext);
|
|
|
|
$line = new graph(640,480);
|
|
$line->parameter['title'] = '';
|
|
$line->parameter['y_label_left'] = $course->students;
|
|
$line->parameter['x_label'] = get_string('grade');
|
|
$line->parameter['y_label_angle'] = 90;
|
|
$line->parameter['x_label_angle'] = 0;
|
|
$line->parameter['x_axis_angle'] = 60;
|
|
|
|
//following two lines seem to silence notice warnings from graphlib.php
|
|
$line->y_tick_labels = null;
|
|
$line->offset_relation = null;
|
|
|
|
$line->parameter['bar_size'] = 1.5; // make size > 1 to get overlap effect
|
|
$line->parameter['bar_spacing'] = 30; // don't forget to increase spacing so that graph doesn't become one big block of colour
|
|
|
|
//pick a sensible number of bands depending on quiz maximum grade.
|
|
$bands = $quiz->grade;
|
|
while ($bands >= 20 || $bands < 10){
|
|
if ($bands >= 50){
|
|
$bands = $bands /5;
|
|
} else if ($bands >= 20) {
|
|
$bands = $bands /2;
|
|
}
|
|
if ($bands < 4){
|
|
$bands = $bands * 5;
|
|
} else if ($bands < 10){
|
|
$bands = $bands * 2;
|
|
}
|
|
}
|
|
|
|
$bandwidth = $quiz->grade / $bands;
|
|
$bandlabels = array();
|
|
for ($i=0;$i < $quiz->grade;$i += $bandwidth){
|
|
$bandlabels[] = number_format($i, $quiz->decimalpoints).' - '.number_format($i+$bandwidth, $quiz->decimalpoints);
|
|
}
|
|
$line->x_data = $bandlabels;
|
|
|
|
$useridlist = join(',',array_keys(get_users_by_capability($modcontext, 'mod/quiz:attempt','','','','','','',false)));
|
|
$line->y_data['allusers'] = quiz_report_grade_bands($bands, $quizid, $useridlist);
|
|
if ($currentgroup){
|
|
//only turn on legends if there is more than one set of bars
|
|
$line->parameter['legend'] = 'outside-top';
|
|
$line->parameter['legend_border'] = 'black';
|
|
$line->parameter['legend_offset'] = 4;
|
|
$useridingrouplist = join(',',array_keys(get_users_by_capability($modcontext, 'mod/quiz:attempt','','','','',$currentgroup,'',false)));
|
|
$line->y_data['groupusers'] = quiz_report_grade_bands($bands, $quizid, $useridingrouplist);
|
|
$line->y_format['groupusers'] =
|
|
array('colour' => 'green', 'bar' => 'fill', 'shadow_offset' => 1, 'legend' => groups_get_group_name($currentgroup));
|
|
$line->y_order = array('allusers', 'groupusers');
|
|
} else {
|
|
$line->y_order = array('allusers');
|
|
}
|
|
|
|
|
|
$line->y_format['allusers'] =
|
|
array('colour' => 'red', 'bar' => 'fill', 'shadow_offset' => 1, 'legend' => get_string('allparticipants'));
|
|
|
|
|
|
$line->parameter['y_min_left'] = 0; // start at 0
|
|
$line->parameter['y_max_left'] = max($line->y_data['allusers']);
|
|
$line->parameter['y_decimal_left'] = 0; // 2 decimal places for y axis.
|
|
|
|
|
|
//pick a sensible number of gridlines depending on max value on graph.
|
|
$gridlines = max($line->y_data['allusers']);
|
|
while ($gridlines >= 10){
|
|
if ($gridlines >= 50){
|
|
$gridlines = $gridlines /5;
|
|
} else {
|
|
$gridlines = $gridlines /2;
|
|
}
|
|
}
|
|
|
|
$line->parameter['y_axis_gridlines'] = $gridlines+1;
|
|
$line->draw();
|
|
?>
|