Flex 基于数据源的Menu Tree实现代码

157 阅读 0 评论 104 点赞

我是靠谱客的博主含糊鸭子，最近开发中收集的这篇文章主要介绍Flex 基于数据源的Menu Tree实现代码，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

实现功能:
1.由外部参数flashvars指定数据源的文件位置或render链接.
2.在源数据上加href和target属性来控制打开窗口.
3.可自定义父节点和子节点图标,不设置采用系统默认.
直接上源码:

复制代码代码如下:

 
<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
fontFamily="simsun" fontSize="12" 
layout="absolute" creationComplete="menu.send();" width="242" height="442" initialize="init()"> 
<mx:Script> 
<![CDATA[ 
import mx.controls.Alert; 
import mx.events.ListEvent; 
import mx.collections.ArrayCollection; 
import mx.rpc.events.ResultEvent; 
[Bindable] 
private var strUrl:String = "TreeMenus.xml"; 
[Bindable] 
private var menus:XML; 
[Bindable] 
[Embed("open.gif")] 
public var openicon:Class; 
[Bindable] 
[Embed("close.gif")] 
public var closeicon:Class; 
[Bindable] 
[Embed("leaf.gif")] 
public var leaficon:Class; 
private function init():void 
{ 
this.strUrl = this.parameters.url; 
} 
private function LoadMenu(event:ResultEvent):void 
{ 
menus = XML(event.result); 
var results:XMLList = menus.node; 
tree1.dataProvider = results; 
} 
//菜单图标设置 
private function treeIcon(item:Object):Class 
{ 
var node:XML = XML(item); 
trace('icon:' + node.@icon); 
var str : String = node.@icon; 
//已经设置图标 
if(node.hasOwnProperty("@icon")) 
{ 
if(node.@icon == 'openicon') 
{ 
return openicon; 
} 
if(node.@icon == 'closeicon') 
{ 
return closeicon; 
} 
if(node.@icon == 'leaficon') 
{ 
return leaficon; 
} 
} 
else 
{ 
//如果没定义icon就直接用默认的　 
if(!tree1.dataDescriptor.isBranch(item)) 
{ 
return tree1.getStyle("defaultLeafIcon"); 
} 
if(tree1.isItemOpen(item)) 
{ 
return tree1.getStyle("folderOpenIcon"); 
} 
else 
{ 
return tree1.getStyle("folderClosedIcon"); 
} 
} 
return null; 
} 
/** 
* 菜单树单项点击事件 
* */ 
private function itemClickHandler(evt:ListEvent):void 
{ 
var item:Object = Tree(evt.currentTarget).selectedItem; 
if (tree1.dataDescriptor.isBranch(item)) 
{ 
//tree1.expandItem(item, !groupTree.isItemOpen(item), true); 
} 
else 
{ 
//得到节点对象 
var node:XML = XML(item); 
//如果有属性href 
if(node.hasOwnProperty("@href") && node.hasOwnProperty("@target")) 
{ 
openURL(node.@href,node.@target); 
} 
if(node.hasOwnProperty("@href") && (node.hasOwnProperty("@target") == false)) 
{ 
//没有指定target默认在新窗口中打开 
openURL(node.@href,"_blank"); 
} 
} 
} 
//页面跳转的方法　 
private function openURL(url:String ,target:String):void 
{ 
var request:URLRequest = new URLRequest(url); 
navigateToURL(request,target); 
} 
]]> 
</mx:Script> 
<mx:HTTPService url="{strUrl}" id="menu" useProxy="false" 
showBusyCursor="true" result="LoadMenu(event)" resultFormat="xml"/> 
<mx:Tree iconFunction="treeIcon" id="tree1" width="100%" height="100%" labelField="@label" itemClick="itemClickHandler(event)"/> 
</mx:Application> 

调用的时候在flashvars里面加上url=xxx

复制代码代码如下:

 
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" 
id="tree" width="242" height="442" 
codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab"> 
<param name="movie" value="${ctx}/js/as/menu.swf" /> 
<param name="quality" value="high" /> 
<param name="bgcolor" value="#869ca7" /> 
<param name="allowScriptAccess" value="sameDomain" /> 
<!-- 指定菜单的数据源 --> 
<param name="flashvars" value="url=${ctx}/user/user!renderMenu.do?id=${user.usid}" /> 
<embed src="tree.swf" quality="high" bgcolor="#869ca7" 
width="242" height="442" name="tree" align="middle" 
play="true" 
loop="false" 
quality="high" 
allowScriptAccess="sameDomain" 
type="application/x-shockwave-flash" 
pluginspage="http://www.adobe.com/go/getflashplayer"> 
</embed> 
</object> 
其中url可以指定xml文件的位置或者render的链接 
示例文件xml: 
<?xml version='1.0' encoding='utf-8'?> 
<menus> 
<node label='系统管理' icon="openicon"> 
<node label='用户管理' icon="closeicon" 
href='/main/user/user-list.jsp' target='mainFrame' /> 
<node label='权限管理' href='/main/user/action-list.jsp' 
target='mainFrame' /> 
<node label='角色管理' href='/main/user/role-list.jsp' 
target='mainFrame' /> 
<node label='域管理' href='/main/user/user-list.jsp' 
target='mainFrame' /> 
<node label='测试'> 
<node label='sub folder' href='' target='mainFrame' /> 
</node> 
</node> 
<node label='客服'> 
<node label='终端信息查询' href='' target='mainFrame' /> 
<node label='客服问题-解答记录' href='' target='mainFrame' /> 
</node> 
</menus> 