public function openFilterForm($usePost = false) {
		$this->_setFlagUsePost($usePost);
		$type = 'get';
		$dataToggle = 'pjax-form';
		if ($this->_getFlagUsePost()) {
			$type = 'post';
			$dataToggle = 'ajax-form';
		} else {
			$filterData = $this->getFilterData();
			if (!empty($filterData)) {
				$this->setFilterInputData($filterData);
			}
			$conditions = $this->getFilterConditions();
			if (!empty($conditions)) {
				$this->setFilterInputConditions($conditions);
			}
		}

		$options = [
			'data-toggle' => $dataToggle,
			'type' => $type,
		];
		$optionsDefault = $this->_getOptionsForElem('openFilterForm');
		$result = $this->ExtBs3Form->create(null, $options + $optionsDefault);

		return $result;
	}