protected function _getFormField()
 {
     $ret = new Kwf_Form_Field_File($this->getData()->componentId);
     $ret->setFieldLabel($this->getRow()->field_label);
     if ($this->getRow()->label_width) {
         $ret->setLabelWidth($this->getRow()->label_width);
     }
     $ret->setAllowBlank(!$this->getRow()->required);
     $ret->setHideLabel($this->getRow()->hide_label);
     if ($this->getRow()->label_position_above) {
         $ret->setLabelPosition('above');
     }
     return $ret;
 }