树结构控件实例 TreeControl

树结构控件实例

书：157

<?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">
    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
        <fx:XMLList id="treedata" xmlns="">
            <node label="我的邮箱" >
                <node label="收件箱" >
                    <node label="家书" />
                    <node label="朋友" />
                    <node label="商务" />
                </node>
                <node label="发件箱" >
                    <node label="公务" />
                    <node label="私人" />
                </node>
                <node label="垃圾邮件" />
            </node>
        </fx:XMLList>
    </fx:Declarations>
 
    <fx:Script>
        <![CDATA[
            import mx.events.ListEvent;
            [Bindable]public var selectNode:Object;
            protected function mytree_changeHandler(event:Event):void
            {
                // TODO Auto-generated method stub
                selectNode=Tree(event.target).selectedItem;
            }
 
        ]]>
    </fx:Script>
 
    <mx:Panel title="树结构控件实例" height="75%" width="75%" paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10" >
        <mx:HDividedBox width="100%" height="100%">
            <mx:Tree id="mytree" width="50%" height="100%" labelField="@label" showRoot="false" dataProvider="{treedata}" change="mytree_changeHandler(event)">
 
            </mx:Tree>
            <mx:TextArea height="100%" width="50" text="所选项目：{selectNode.@label}" />
        </mx:HDividedBox>
    </mx:Panel>
</s:Application>