public function CalendarFilterForm()
{
if ($date = CalendarUtil::getDateFromURL()) {
$date_obj = new sfDate($date);
} elseif ($date = DataObject::get_one($this->getDateTimeClass(), "EventID = {$this->ID}", "StartDate ASC")) {
$date_obj = new sfDate($date->StartDate);
} else {
return false;
}
$controller_name = $this->Parent()->class . "_Controller";
if (class_exists($controller_name)) {
$controller = new $controller_name($this->Parent());
$controller->parseURL();
return $controller->CalendarFilterForm($date_obj);
}
}