protected function _onOwnRowUpdateNotVisible(Kwf_Component_Data $c, Kwf_Events_Event_Row_Abstract $event)
    {
        parent::_onOwnRowUpdateNotVisible($c, $event);
        if ($event->isDirty(array('kwf_upload_id', 'width', 'height',
                'dimension', 'crop_x', 'crop_y',
                'crop_width', 'crop_height'))
        ) {
            $this->_fireMediaChanged($c);
        }
    }