/** * This method return a graph containing information about evaluations * inside courses in sessions, it's used inside get_block method for * showing it inside dashboard interface * @return string img html */ public function get_evaluations_courses_in_sessions_graph() { $graphs = array(); if (!empty($this->sessions)) { $session_ids = array_keys($this->sessions); foreach ($session_ids as $session_id) { $courses_code = array_keys(Tracking::get_courses_list_from_session($session_id)); $courses_graph = array(); foreach ($courses_code as $course_code) { $cats = Category::load(null, null, $course_code, null, null, $session_id); if (isset($cats) && isset($cats[0])) { $alleval = $cats[0]->get_evaluations(null, true, $course_code); $alllinks = $cats[0]->get_links(null, true); $users = get_all_users($alleval, $alllinks); $datagen = new FlatViewDataGenerator ($users, $alleval, $alllinks); $evaluation_sumary = $datagen->get_evaluation_sumary_results(); if (!empty($evaluation_sumary)) { $items = array_keys($evaluation_sumary); $max = $min = $avg = array(); foreach ($evaluation_sumary as $evaluation) { $max[] = $evaluation['max']; $min[] = $evaluation['min']; $avg[] = $evaluation['avg']; } // Dataset definition $data_set = new pData; $data_set->AddPoint($max, "Max"); $data_set->AddPoint($avg, "Avg"); $data_set->AddPoint($min, "Min"); $data_set->AddPoint($items, "Items"); $data_set->SetXAxisName(get_lang('EvaluationName')); $data_set->SetYAxisName(get_lang('Percentage')); $data_set->AddAllSeries(); $data_set->RemoveSerie("Items"); $data_set->SetAbsciseLabelSerie("Items"); $graph_id = $this->user_id.'StudentEvaluationGraph'; $cache = new pCache(); // the graph id $data = $data_set->GetData(); if ($cache->IsInCache($graph_id, $data)) { //if we already created the img $img_file = $cache->GetHash($graph_id, $data); } else { // Initialise the graph $angle = -30; $test = new pChart($this->bg_width, $this->bg_height); $test->setFontProperties(api_get_path(LIBRARY_PATH) . 'pchart/fonts/tahoma.ttf', 8); $test->fixHeightByRotation( $data_set->GetData(), $data_set->GetDataDescription(), $angle ); $test->setGraphArea(50, 30, $this->bg_width - 75, $this->bg_height - 75); $test->drawFilledRoundedRectangle( 7, 7, $this->bg_width - 20, $test->YSize - 20, 5, 240, 240, 240 ); $test->drawRoundedRectangle( 5, 5, $this->bg_width - 18, $test->YSize - 18, 5, 230, 230, 230 ); $test->drawGraphArea(255,255,255,TRUE); $test->setFixedScale(0,100,5); $test->drawScale( $data_set->GetData(), $data_set->GetDataDescription(), SCALE_ADDALL, 150, 150, 150, TRUE, $angle, 2, TRUE ); $test->setColorPalette(0,105,221,34); $test->setColorPalette(1,255,135,30); $test->setColorPalette(2,255,0,0); $test->drawGrid(4,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 $test->drawOverlayBarGraph($data_set->GetData(),$data_set->GetDataDescription(), 100); // Finish the graph $test->setFontProperties(api_get_path(LIBRARY_PATH).'pchart/fonts/tahoma.ttf',8); $test->drawLegend($this->bg_width-80,20,$data_set->GetDataDescription(),255,255,255); $test->setFontProperties(api_get_path(LIBRARY_PATH).'pchart/fonts/tahoma.ttf',10); $test->setColorPalette(0,50,50,50); $test->setColorPalette(1,50,50,50); $test->setColorPalette(2,50,50,50); $test->writeValues($data_set->GetData(),$data_set->GetDataDescription(),array("Min", "Max", "Avg")); $cache->WriteToCache($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)) { $courses_graph[$course_code] = '<img src="'.api_get_path(WEB_ARCHIVE_PATH).$img_file.'">'; } } } } if (!empty($courses_graph)) { $graphs[$session_id] = $courses_graph; } } } return $graphs; }