新手求救！EXTJS5的tree菜单如何实现右键菜单的问题

Question

EXTJS5的tree菜单右键点击节点时显示右键菜单，添加，删除，修改的操作

Answer 1

        var selectedRow;
        var menu = Ext.create('Ext.menu.Menu', {
            floating: true,
            items: [{ text: '新建', handler: function () { console.log(selectedRow) ;/*....*/} }, { text: '删除', handler: function () { } }],
            renderTo:document.body
        })
        Ext.define('Ext.tree.Panel', {
            listeners: {
                beforecellcontextmenu: function (pl, td, cellIndex, record, tr, rowIndex, e, eOpts) {
                    selectedRow = record;
                    var xy = Ext.get(td).getXY();
                    menu.showAt(xy[0] + 100, xy[1]);
                }
            },