/**
* in widget form update hook
* @param unknown $instance
* @param unknown $new_instance
* @param unknown $old_instance
*/
public static function _hwbtw_in_widget_form_update($instance, $new_instance, $old_instance)
{
global $wp_registered_widgets;
$widget_obj = $wp_registered_widgets[$new_instance['hwbtw-widget-id']];
//re-create this class assign to current widget
$hwbtw = new self($widget_obj['callback'][0], $new_instance);
//this not work if has more than one button toggle, just only save for first toggle
$expandoptions_field = $hwbtw->generate_name('expandoptions', true);
session_start();
$_SESSION['a1'] = $widget_obj['callback'];
if (isset($new_instance[$expandoptions_field])) {
$instance[$expandoptions_field] = $new_instance[$expandoptions_field];
//save expand options
}
return $instance;
}
