datagrid加入键盘监听事件

(function ($) {
    $.fn.ggrid = function (options) {
        $(this).datagrid(options);

        var grid = this;

        //键盘监听
        $(window).keydown(function (event) {
            var currentRowIndex = $(grid).datagrid("getRowIndex", $(grid).datagrid("getSelected"));
            switch (event.keyCode) {
                case 38:
                    $(grid).datagrid("unselectAll");
                    var allLins = $(grid).datagrid("getRows").length;
                    currentRowIndex = currentRowIndex == 0 ? allLins : currentRowIndex-1;
                    $(grid).datagrid("selectRow", currentRowIndex );
                    break;
                case 40:
                    $(grid).datagrid("unselectAll");
                    var allLins = $(grid).datagrid("getRows").length;
                    currentRowIndex = currentRowIndex == allLins ? 0 : currentRowIndex+1;
                    $(grid).datagrid("selectRow", currentRowIndex );
                    break;
            }
        });
        return grid;
    }
})(jQuery);