<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical">
<mx:Script>
<![CDATA[
private function expandTree(expand:Boolean):void {
tree.validateNow();
tree.expandChildrenOf(treeData, expand);
}
]]>
</mx:Script>
<mx:XML id="treeData" xmlns="">
<root label="root">
<menu label="node1">
<menu label="node1.1"/>
<menu label="node1.2"/>
<menu label="node1.3"/>
</menu>
<menu label="node2">
<menu label="node2.1"/>
<menu label="node2.2"/>
<menu label="node2.3"/>
</menu>
</root>
</mx:XML>
<mx:Tree id="tree" dataProvider="{treeData}"
width="200" height="300"
labelField="@label"/>
<mx:Button label="全部展开" click="expandTree(true)"/>
<mx:Button label="全部收起" click="expandTree(false)"/>
</mx:Application>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical">
<mx:Script>
<![CDATA[
private function expandTree(expand:Boolean):void {
tree.validateNow();
tree.expandChildrenOf(treeData, expand);
}
]]>
</mx:Script>
<mx:XML id="treeData" xmlns="">
<root label="root">
<menu label="node1">
<menu label="node1.1"/>
<menu label="node1.2"/>
<menu label="node1.3"/>
</menu>
<menu label="node2">
<menu label="node2.1"/>
<menu label="node2.2"/>
<menu label="node2.3"/>
</menu>
</root>
</mx:XML>
<mx:Tree id="tree" dataProvider="{treeData}"
width="200" height="300"
labelField="@label"/>
<mx:Button label="全部展开" click="expandTree(true)"/>
<mx:Button label="全部收起" click="expandTree(false)"/>
</mx:Application>