public function getListOffset($page = 1, $default = 0)
    {

        $limit = $this->getListLimit();
        $offset = $this->getState("limitoffset", intval($default));

        $offset = empty($offset) ? (empty($page) || (int)$page <= 1) ? intval($default) : intval($page - 1) * $limit : $offset;

        return $offset;
    }