【Egret】中tree组件使用案例

Egret中tree组件使用案例，包含（文本过多时，自动换行功能）

下面代码结合http://bbs.egret.com/forum.php?mod=viewthread&tid=19028&page=1#pid133680这篇文章，修改exml；

private creatTree(): void {
        var dp: egret.gui.ObjectCollection = new egret.gui.ObjectCollection();
        dp.source = { children: [{ dir: true,name: "TreeItem0",children: [{ name: "TreeItem00大娃娃吾问无为谓\r呜呜呜呜呜呜dawd" },
            { dir: true,name: "TreeItem01",children: [{ name: "TreeItem010" }] }] },
            { dir: true,name: "TreeItem1",children: [{ name: "TreeItem10" },{ name: "TreeItem11" }] },{ name: "TreeItem2" }] };

        //设置数据源的父子关系，这样才会缩进
        egret.gui.ObjectCollection.assignParent(dp.source,"children","parent");

        //创建树
        var tree: egret.gui.Tree = new egret.gui.Tree();
        tree.labelField = "name";
        tree.top = 20;
        tree.left = 20;
        tree.right = 20;
        tree.height = 300;
        tree.dataProvider = dp;
        tree.expandItem(dp.getItemAt(0),true);
        this.addChild(tree);

        // 还可以通过iconFunction，设置每一项前面显示的小图标：
        //           tree.iconFunction = this.iconFunc;
        /*呈现项的icon筛选*/
    }

    private iconFunc(item: any): any {
        if(item.dir) return "tree_icon_dir_png";
        else return "tree_icon_file_png";
    } 

完整的项目案例：https://github.com/arvin0/EgretExamples/tree/master/GUI%20Tree