flex 学习笔记 tree的各个子级的颜色

代码：

<?xml version="1.0" encoding="utf-8"?> 
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"   
               xmlns:s="library://ns.adobe.com/flex/spark"   
               xmlns:mx="library://ns.adobe.com/flex/mx"   
               minWidth="955" minHeight="600" xmlns:logic="contr.*"> 
    <fx:Declarations> 
        <!-- 将非可视元素（例如服务、值对象）放在此处 --> 
        <fx:XMLList id="treeData"> 
            <node label="选择数据集"> 
                <node label="hsql"> 
                    <node label="tabels"> 
                          <node label="订单" head="p_w_picpaths/install.jpg"/> 
                          <node label="订单明细" head="p_w_picpaths/install.jpg"/> 
                          <node label="雇员" head="p_w_picpaths/install.jpg"/> 
                    </node>   
                </node> 
                <node label="mysql"> 
                    <node label="tabels"> 
                          <node label="demo_salesday" head="p_w_picpaths/install.jpg"/> 
                          <node label="Personal" head="p_w_picpaths/install.jpg"/> 
                    </node>   
                </node> 
            </node> 
        </fx:XMLList> 
    </fx:Declarations> 
    <mx:VBox backgroundColor="#CCCCCC" width="100%" height="100%" verticalAlign="middle" horizontalAlign="center"> 
        <mx:Tree dataProvider="{treeData}" width="200" height="200" labelField="@label"  depthColors="[#CCCCCC,#f60f0f,#1c47e8,#31eb18]"/> 
    </mx:VBox> 
</s:Application> 

效果：