/**
* Build chart for active sessions
*
* @param array $a_data
* @param string $a_title
* @param int $a_scale
* @param array $a_measure
* @return string
*/
protected function getChart($a_data, $a_title, $a_scale = self::SCALE_DAY, $a_measure = null)
{
global $lng;
include_once "Services/Chart/classes/class.ilChart.php";
$chart = new ilChart("objstacc", 700, 500);
$chart->setYAxisToInteger(true);
$legend = new ilChartLegend();
$chart->setLegend($legend);
if (!$a_measure) {
$a_measure = array("min", "avg", "max");
} else {
if (!is_array($a_measure)) {
$a_measure = array($a_measure);
}
}
$colors_map = array("min" => "#00cc00", "avg" => "#0000cc", "max" => "#cc00cc");
$colors = $act_line = array();
foreach ($a_measure as $measure) {
$act_line[$measure] = new ilChartData("lines");
$act_line[$measure]->setLineSteps(true);
$act_line[$measure]->setLabel($lng->txt("trac_session_active_" . $measure));
$colors[] = $colors_map[$measure];
}
if ($a_scale != self::SCALE_PERIODIC_WEEK) {
$max_line = new ilChartData("lines");
$max_line->setLabel($lng->txt("session_max_count"));
$colors[] = "#cc0000";
}
$chart->setColors($colors);
$chart_data = $this->adaptDataToScale($a_scale, $a_data, 700);
unset($a_data);
$scale = ceil(sizeof($chart_data) / 5);
$labels = array();
foreach ($chart_data as $idx => $item) {
$date = $item["slot_begin"];
if ($a_scale == self::SCALE_PERIODIC_WEEK || !($idx % ceil($scale))) {
switch ($a_scale) {
case self::SCALE_DAY:
$labels[$date] = date("H:i", $date);
break;
case self::SCALE_WEEK:
$labels[$date] = date("d.m. H", $date) . "h";
break;
case self::SCALE_MONTH:
$labels[$date] = date("d.m.", $date);
break;
case self::SCALE_YEAR:
$labels[$date] = date("Y-m", $date);
break;
case self::SCALE_PERIODIC_WEEK:
$day = substr($date, 0, 1);
$hour = substr($date, 1, 2);
$min = substr($date, 3, 2);
// build ascending scale from day values
$day_value = ($day - 1) * 60 * 60 * 24;
$date = $day_value + $hour * 60 * 60 + $min * 60;
// 6-hour interval labels
if ($hour != $old_hour && $hour && $hour % 6 == 0) {
$labels[$date] = $hour;
$old_hour = $hour;
}
// day label
if ($day != $old_day) {
$labels[$date] = ilCalendarUtil::_numericDayToString($day, false);
$old_day = $day;
}
break;
}
}
foreach ($a_measure as $measure) {
$value = (int) $item["active_" . $measure];
$act_line[$measure]->addPoint($date, $value);
}
if ($a_scale != self::SCALE_PERIODIC_WEEK) {
$max_line->addPoint($date, (int) $item["max_sessions"]);
}
}
foreach ($act_line as $line) {
$chart->addData($line);
}
if ($a_scale != self::SCALE_PERIODIC_WEEK) {
$chart->addData($max_line);
}
$chart->setTicks($labels, null, true);
return $chart->getHTML();
}
protected function renderChart($a_id, $a_variables)
{
include_once "Services/Chart/classes/class.ilChart.php";
$chart = new ilChart($a_id, 700, 400);
$legend = new ilChartLegend();
$chart->setLegend($legend);
$chart->setYAxisToInteger(true);
$data = new ilChartData("bars");
$data->setLabel($this->lng->txt("users_answered"));
$data->setBarOptions(0.5, "center");
$max = 5;
if (sizeof($a_variables) <= $max) {
if ($a_variables) {
$labels = array();
foreach ($a_variables as $idx => $points) {
$data->addPoint($idx, $points["selected"]);
$labels[$idx] = $idx + 1 . ". " . ilUtil::prepareFormOutput($points["title"]);
}
$chart->addData($data);
$chart->setTicks($labels, false, true);
}
return "<div style=\"margin:10px\">" . $chart->getHTML() . "</div>";
} else {
$chart_legend = array();
$labels = array();
foreach ($a_variables as $idx => $points) {
$data->addPoint($idx, $points["selected"]);
$labels[$idx] = $idx + 1 . ".";
$chart_legend[$idx + 1] = ilUtil::prepareFormOutput($points["title"]);
}
$chart->addData($data);
$chart->setTicks($labels, false, true);
$legend = "<table>";
foreach ($chart_legend as $number => $caption) {
$legend .= "<tr valign=\"top\"><td>" . $number . ".</td><td>" . $caption . "</td></tr>";
}
$legend .= "</table>";
return "<div style=\"margin:10px\"><table><tr valign=\"bottom\"><td>" . $chart->getHTML() . "</td><td class=\"small\" style=\"padding-left:15px\">" . $legend . "</td></tr></table></div>";
}
}
