Flex Tree 自定义Icon

 

Flex Tree自定义Icon 有几种方法，相信网上说的也比较多了，但是还是总结下来，查询起来比较方便。

1.设置Tree的一些默认属性。文件夹和文件都是通过 folderOpenIcon, folderClosedIcon, and defaultLeafIcon ,disclosureClosedIcon,disclosureOpenIcon 来执行的。

 

 

<mx:Tree id="myTree" width="50%" height="100%" labelField="@label"
			 folderOpenIcon="@Embed(source='open.jpg')"folderClosedIcon="@Embed(source='closed.jpg')"defaultLeafIcon="@Embed(source='def.jpg')"
			 showRoot="false" dataProvider="{treeData}"/>

 2.在数据源中设置icon。

 

 

[Embed(source='view/icon_xls.png')]
[Bindable]public var icon1:Class;
		<fx:Declarations>

		<fx:XMLList id="treeData">
			<node label="Mail Box" >
				<node label="Inbox" >
					<node label="Marketing" icon="icon1"/>
					<node label="Product Management" icon="icon1"/>
					<node label="Personal" icon="icon1"/>
				</node>
				<node label="Outbox" >
					<node label="Professional" icon="icon1"/>
					<node label="Personal" icon="icon1"/>
				</node>
				<node label="Spam" />
				<node label="Sent" />
			</node>
		</fx:XMLList>
	</fx:Declarations>
 <mx:Tree id="myTree" width="50%" height="100%" labelField="@label"
			 iconField="@icon"
			 showRoot="false" dataProvider="{treeData}"/>

 

3.通过设置函数 setItemItcon

 

 

protected function button_clickHandler(event:MouseEvent):void
			{
				for each(var item:XML in treeData)
				{
					iteratorItemList(item);
				}
			}
			
			private function iteratorItemList(xmllist:XML):void
			{
				for each(var item:XML in xmllist.children())
				{
					if(item.children() && item.children().length() > 0)
					{
						iteratorItemList(item);
					}
					else
					{
						myTree.setItemIcon(item,icon1,icon2);
					}
				}
			}

 

4.用iconFunction

 

 

private function tree_iconFunc(item:Object):Class {
				var iconClass:Class;
				switch ((item as XML)[e-mail]()) {
					case "Marketing":
						iconClass = icon1;
						break;
					case "Personal":
						iconClass = icon2;
						break;
					case "Professional":
						iconClass = icon3;
						break;
				}
				return iconClass;
			}