fineui-custom-tutorials/examples/single_tree/single_tree.js

var mockData = [
    {
        id: "无锡",
        text: "无锡",
        isParent: true,
    }, {
        id: "锡山区",
        text: "锡山区",
        pId: "无锡",
        isParent: true,
    }, {
        id: "安镇街道",
        text: "安镇街道",
        pId: "锡山区",
    }, {
        id: "滨湖区",
        text: "滨湖区",
        pId: "无锡",
    }, {
        id: "南京",
        text: "南京",
        isParent: true,
    }, {
        id: "建邺区",
        text: "建邺区",
        pId: "南京",
    }
];


var Tree = BI.inherit(BI.Widget, {

    render: function () {
        return {
            type: "bi.custom_tree",
            expander: {
                type: "bi.expander",
                isDefaultInit: false,
                el: {},
                popup: {
                    type: "bi.custom_tree",
                },
            },
            el: {
                type: "bi.button_tree",
                chooseType: 0,
                layouts: [
                    {
                        type: "bi.vertical",
                    },
                ],
            },
            items: this._formatItems(mockData)
        }
    },

    _formatItems: function (items) {

        var nodes = BI.map(items, function (index, item) {
            return BI.extend({
                type: item.isParent ? "bi.example.single_custom_tree.node" : "bi.example.single_custom_tree.item"
            }, item)
        })

        return this.traversalLayers(BI.Tree.transformToTreeFormat(nodes), 0);
    },


    traversalLayers: function (items, layer) {
        var self = this;
        BI.each(items, function (index, item) {
            item.layer = layer;
            if (item.children) {
                self.traversalLayers(item.children, layer + 1)
            }
        })
        return items;
    }
});

BI.shortcut("bi.example.single_custom_tree", Tree);

BI.createWidget({
    type: "bi.example.single_custom_tree",
    element: "#wrapper"
})