/**
* This method return a graph containing informations about students evaluation, it's used inside get_block method for showing it inside dashboard interface
* @return string img html
*/
public function get_students_attendance_graph()
{
$students = $this->students;
$attendance = new Attendance();
// get data
$attendances_faults_avg = array();
if (is_array($students) && count($students) > 0) {
foreach ($students as $student) {
$student_id = $student['user_id'];
//$student_info = api_get_user_info($student_id);
// get average of faults in attendances by student
$results_faults_avg = $attendance->get_faults_average_inside_courses($student_id);
if (!empty($results_faults_avg)) {
$attendances_faults_avg[$student['lastname']] = $results_faults_avg['porcent'];
} else {
$attendances_faults_avg[$student['lastname']] = 0;
}
}
}
arsort($attendances_faults_avg);
$usernames = array_keys($attendances_faults_avg);
$faults = array();
foreach ($usernames as $username) {
$faults[] = $attendances_faults_avg[$username];
}
$graph = '';
$img_file = '';
if (is_array($usernames) && count($usernames) > 0) {
// Defining data
$data_set = new pData();
$data_set->AddPoint($faults, "Promedio");
$data_set->AddPoint($usernames, "Usuario");
$data_set->AddAllSeries();
$data_set->SetAbsciseLabelSerie("Usuario");
// prepare cache for saving image
$graph_id = $this->user_id . 'StudentEvaluationGraph';
// the graph id
$cache = new pCache(api_get_path(SYS_ARCHIVE_PATH));
$data = $data_set->GetData();
// return $this->DataDescription
if ($cache->IsInCache($graph_id, $data_set->GetData())) {
//if (0) {
//if we already created the img
$img_file = $cache->GetHash($graph_id, $data_set->GetData());
// image file with hash
} else {
if (count($usernames) < 5) {
$height = 200;
} else {
$height = count($usernames) * 40;
}
// Initialise the graph
$test = new MyHorBar(400, $height + 30);
$test->setFontProperties(api_get_path(LIBRARY_PATH) . 'pchart/fonts/tahoma.ttf', 8);
$test->setGraphArea(100, 30, 370, $height);
$test->drawFilledRoundedRectangle(7, 7, 393, $height, 5, 240, 240, 240);
$test->drawRoundedRectangle(5, 5, 395, $height, 5, 230, 230, 230);
$test->drawGraphArea(255, 255, 255, TRUE);
//X axis
$test->setFixedScale(0, 100, 10);
//var_dump($data_set->GetDataDescription());
$test->drawHorScale($data_set->GetData(), $data_set->GetDataDescription(), SCALE_ADDALL, 150, 150, 150, TRUE, 0, 0, TRUE);
$test->setColorPalette(0, 255, 0, 0);
$test->drawHorGrid(10, TRUE, 230, 230, 230, 50);
// Draw the 0 line
$test->setFontProperties(api_get_path(LIBRARY_PATH) . 'pchart/fonts/tahoma.ttf', 6);
$test->drawTreshold(0, 143, 55, 72, TRUE, TRUE);
// Draw the bar graph
$test->drawHorBarGraph($data_set->GetData(), $data_set->GetDataDescription(), TRUE, 50);
$cache->WriteToCache($graph_id, $data_set->GetData(), $test);
ob_start();
$test->Stroke();
ob_end_clean();
$img_file = $cache->GetHash($graph_id, $data_set->GetData());
}
if (!empty($img_file)) {
$graph = '<img src="' . api_get_path(WEB_ARCHIVE_PATH) . $img_file . '">';
}
} else {
$graph = '<p>' . api_convert_encoding(get_lang('GraphicNotAvailable'), 'UTF-8') . '</p>';
}
return $graph;
}
/**
* Create graph (a .png file)
*
* @param string $file
*/
public function generateGraph($file)
{
$patientValues = Storage::getInstance()->getPatientsData($file);
/*
* pGraph work
*/
$dataSet = new pData();
if (!empty($patientValues)) {
$dataSet->AddPoint(array_keys($patientValues[$file]), 'label');
$dataSet->SetAbsciseLabelSerie('label');
$serie1 = array_values($patientValues[$file]);
$average = round(array_sum($serie1) / count($serie1), 2);
$dataSet->AddPoint($serie1, "Serie1");
$dataSet->AddSerie("Serie1");
// Initialise the graph
$graph = new MyHorBar(450, 600);
$graph->setFontProperties($this->fontsPath . '/tahoma.ttf', 8);
$graph->setGraphArea(120, 60, 410, 550);
$graph->drawFilledRoundedRectangle(7, 7, 443, 593, 5, 240, 240, 240);
$graph->drawRoundedRectangle(5, 5, 443, 595, 5, 230, 230, 230);
$graph->drawGraphArea(255, 255, 255, true);
$graph->drawHorScale($dataSet->GetData(), $dataSet->GetDataDescription(), SCALE_START0, 150, 150, 150, true, 0, 2, true);
$graph->drawHorGrid(10, true, 230, 230, 230, 50);
// Draw the 0 line
$graph->setFontProperties($this->fontsPath . '/tahoma.ttf', 6);
$graph->drawTreshold($average, 143, 55, 72, true, false, 2, null, 90);
// Draw the bar graph
$graph->drawHorBarGraph($dataSet->GetData(), $dataSet->GetDataDescription(), false);
// Finish the graph
$graph->setFontProperties($this->fontsPath . '/tahoma.ttf', 10);
$graph->drawLegend(15, 15, $dataSet->GetDataDescription(), 255, 255, 255);
$graph->setFontProperties($this->fontsPath . '/tahoma.ttf', 10);
$graph->drawTitle(170, 27, $file, 50, 50, 50, -1);
} else {
$graph = new pChart(450, 150);
$graph->setGraphArea(120, 60, 410, 100);
$graph->drawFilledRoundedRectangle(7, 7, 443, 143, 5, 240, 240, 240);
$graph->drawRoundedRectangle(5, 5, 443, 145, 5, 230, 230, 230);
$graph->setFontProperties($this->fontsPath . '/tahoma.ttf', 10);
$graph->drawTitle(170, 27, $file, 50, 50, 50, -1);
$graph->setFontProperties($this->fontsPath . '/tahoma.ttf', 36);
$graph->drawTitle(125, 90, 'No data!', 245, 50, 50, -1);
}
$graph->Render(WWW_DIR . '/images/graphs/' . $file . '.png');
}