public function data_preprocessing(&$defaultvalues)
{
global $DB;
parent::data_preprocessing($defaultvalues);
if ($this->_instance) {
$markers = $DB->get_records('emarking_markers', array('emarking' => $this->_instance));
foreach ($markers as $marker) {
$defaultvalues['marker-' . $marker->marker] = 1;
}
}
$defaultvalues["id"] = $this->_customdata["id"];
}