Demo.Func = BI.inherit(BI.Widget, {
    props: {
        baseCls: "demo-func"
    },

    render: function () {
        var tree = BI.createWidget({
            type: "bi.display_tree",
            element: this
        });

        tree.initTree([{
            id: 1,
            text: "第一项",
            open: true
        }, {
            id: 2,
            text: "第二项"
        }, {
            id: 11,
            pId: 1,
            text: "子项1(共2个)",
            open: true
        }, {
            id: 111,
            pId: 11,
            text: "子子项1"
        }, {
            id: 112,
            pId: 11,
            text: "子子项2"
        }, {
            id: 12,
            pId: 1,
            text: "子项2"
        }, {
            id: 13,
            pId: 1,
            text: "子项3"
        }]);
    }
});
BI.shortcut("demo.display_tree", Demo.Func);