public function getListType()
    {
        if ($this->_sListType == null) {
            if ($listType = \OxidEsales\Eshop\Core\Registry::getConfig()->getRequestParameter('listtype')) {
                $this->_sListType = $listType;
            } elseif ($listType = \OxidEsales\Eshop\Core\Registry::getConfig()->getGlobalParameter('listtype')) {
                $this->_sListType = $listType;
            }
        }

        return $this->_sListType;
    }