nicolasconnault
164 lines
6.7 KiB
PHP
164 lines
6.7 KiB
PHP
<?php
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///////////////////////////////////////////////////////////////////////////
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// //
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// NOTICE OF COPYRIGHT //
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// //
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// Moodle - Modular Object-Oriented Dynamic Learning Environment //
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// http://moodle.org //
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// //
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// Copyright (C) 1999 onwards Martin Dougiamas http://moodle.com //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation; either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details: //
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// //
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// http://www.gnu.org/copyleft/gpl.html //
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// //
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///////////////////////////////////////////////////////////////////////////
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require_once $CFG->dirroot . '/grade/report/visual/visualizations/visualization.php';
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class grade_distribution_bar extends visualization {
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const RANGE = 10;
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public $percent = true;
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public $colorencoder;
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public $selector;
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public $itemlegend;
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public function __construct() {
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global $DB;
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parent::__construct(get_string('gradedistributionbar', 'gradereport_visual'));
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$this->layout = visualization::LAYOUT_AXIS;
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$this->layoutsettings = null; //array('false', 'true');
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$this->nodeshape = visualization::SHAPE_VERTICAL_BAR;
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$this->xaxis = 'grade';
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$this->yaxis = 'students';
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$this->xaxislabelformat = '0\\%';
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//$this->xaxismax = 100 + grade_distribution::RANGE;
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//$this->xaxismin = grade_distribution::RANGE;
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$this->xaxisxoffset = -27;
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$this->xaxislabel = get_string('grade', 'gradereport_visual');
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if($this->percent) {
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$this->yaxislabelformat = '0\\%';
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$this->yaxislabel = get_string('percentstudents', 'gradereport_visual');
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} else {
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$this->yaxislabel = get_string('numberstudents', 'gradereport_visual');
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}
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$this->title = get_string('gradedistribution:title', 'gradereport_visual');
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$this->capability = 'gradereport/visual:vis:grade_distribution_bar';
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$this->usegroups = true;
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$options = array();
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foreach(groups_get_all_groups(required_param('id')) as $groupkey=>$group) {
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$options[$groupkey] = grade_report_visual::truncate($group->name);
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}
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$options[0] = 'All Groups';
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if(isset($DB) && !is_null($DB)) {
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$course = $DB->get_record('course', array('id' => required_param('id')));
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} else {
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$course = get_record('course', 'id', required_param('id'));
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}
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if (!$course) {
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print_error('nocourseid');
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}
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$active = groups_get_course_group($course, true);
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if(!$active) {
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$active = 0;
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}
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$this->selector = new selector('group', $options, $active);
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$this->selectors = array($this->selector);
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$this->colorencoder = new encoder(encoder::ENCODER_COLOR, 'item');
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$this->encoders = array($this->colorencoder);
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$this->itemlegend = new legend($this->colorencoder, array(get_string('coursetotal', 'grades')));
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$this->legends = array($this->itemlegend);
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}
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public function report_data($visualreport) {
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$data = array();
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$data['header'] = array();
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$data['header']['students'] = 'students';
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$data['header']['grade'] = 'grade';
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$data['header']['item'] = 'item';
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$rawdata = array();
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$counters = array();
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$rangesize = round(100 / grade_distribution::RANGE);
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foreach($visualreport->grades as $itemkey=>$itemgrades) {
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foreach($itemgrades as $studentkey=>$studentdata) {
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if($studentdata != null && $studentdata->finalgrade != null) {
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$gradelevel = floor(round($studentdata->standardise_score($studentdata->finalgrade, $visualreport->gtree->items[$itemkey]->grademin, $visualreport->gtree->items[$itemkey]->grademax, 0, 100)) / grade_distribution::RANGE);
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//if($gradelevel == $rangesize) {
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// $gradelevel = $rangesize - 1;
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//}
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if(isset($rawdata[$gradelevel][$itemkey])) {
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$rawdata[$gradelevel][$itemkey] += 1;
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} else {
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$rawdata[$gradelevel][$itemkey] = 1;
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}
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if(isset($counters[$itemkey])) {
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$counters[$itemkey] += 1;
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} else {
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$counters[$itemkey] = 1;
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}
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}
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}
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for($i = 0; $i <= $rangesize; $i++) {
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if(!isset($rawdata[$i][$itemkey])) {
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$rawdata[$i][$itemkey] = 0;
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}
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}
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}
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$i = 0;
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foreach($rawdata as $gradelevel=>$items) {
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foreach($items as $itemkey=>$students) {
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$index = $gradelevel * 10000 + $i;
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if($this->percent) {
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$data[$index]['students'] = ($students / $counters[$itemkey]) * 100;
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} else {
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$data[$index]['students'] = $students;
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}
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//$data[$index]['students'] = $students;
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$data[$index]['grade'] = $gradelevel * grade_distribution::RANGE; //($gradelevel * grade_distribution::RANGE) . '% - ' . (($gradelevel + 1) * grade_distribution::RANGE - 1) . '%';
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$data[$index]['item'] = $visualreport->gtree->items[$itemkey]->get_name();
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$i++;
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}
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}
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return $data;
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}
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}
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?>
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