extjs tree

treePanel.on({
            //目录树单击事件
            'itemclick' : function(view, rcd, item, idx, event, eOpts) {
                var dirid = rcd.get('id'); //节点id
                var dirtype = rcd.raw.dirtype; //自定义数据
        },
        //目录树双击击事件
            'itemdblclick' : function(view, rcd, item, idx, event, eOpts) {
                var dirid = rcd.get('id'); //节点id
                var dirtype = rcd.raw.dirtype; //自定义数据
        },
            //目录数右键事件
            'itemcontextmenu' : function(view, rcd, item, idx, event, eOpts) {
                event.preventDefault();
                this.showTreeItemMenu(rcd, event); //自定义处理函数
            },
            scope : this
        });