Flex中嵌入网页(IFrame)

转自：http://alvinqq.javaeye.com/blog/539618

 

这段时间一直在苦心研究Flex，今天突然想，我们平时都是把swf放到网页中，怎么才能把网页嵌入到Flex中呢？我查了一些资料，然后经过自己的不懈努力，终于搞定。
为了方便，写了个嵌入HTML页面的代理IFrame组件，该组件封装了所有需要的Flex端代码，后面只要通过标签调用就OK了。
IFrame.mxml文件如下：

Java代码

1. <?xml version="1.0" encoding="utf-8"?>   
2. <mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" resize="callLater(moveIFrame)" move="callLater(moveIFrame)" initialize="init();">   
3.         <mx:Script>   
4.         <![CDATA[   
5.             import mx.controls.Alert;   
6.             import flash.external.ExternalInterface;     
7.             import flash.geom.Point;     
8.             import flash.net.navigateToURL;     
9.             private var __source: String;   
10.                
11.             //Flash场景0,0坐标 var localPt:Point = new Point(0, 0);    
12.             //转换为浏览器页面坐标 var globalPt:Point = this.localToGlobal(localPt);     
13.             //这样就可以在Flex页面中嵌入任意的HTML页面了，为了方便，   
14.                         public function moveIFrame():void  
15.             {   
16.                 var localPoint:Point = new Point(0, 0);     
17.                 var globalPoint:Point = this.localToGlobal(localPoint);     
18.                 ExternalInterface.call("moveIFrame", globalPoint.x, globalPoint.y, this.width, this.height);     
19.             }   
20.                
21.             //调用javaScript的loadIFrame方法，设置IFrame的src(URL)   
22.             public function set source(source: String): void {     
23.                 if (source)    
24.                 {     
25.                     if (!ExternalInterface.available)     
26.                     {     
27.                        Alert.show("The ExternalInterface is not available in this container. Internet Explorer ActiveX, " +    
28.                             "Firefox, Mozilla 1.7.5 and greater, or other browsers that support NPRuntime are required.");     
29.                     }     
30.                     __source = source;    
31.                     //Alert.show(source);    
32.                     ExternalInterface.call("loadIFrame",source);     
33.                 }     
34.             }    
35.                
36.             //初始化时注册供javaScript调用的方法   
37.             public function init():void  
38.             {   
39.                 ExternalInterface.addCallback("IFrameOnBulr",showIFrameAgain);   
40.             }   
41.                
42.             //javaScript调用IFrameOnBlur方法时的处理方法   
43.             public function showIFrameAgain():void  
44.             {   
45.                 this.source=this.__source;   
46.                 this.showIFrame=true;   
47.                 this.moveIFrame();   
48.             }   
49.                
50.             //调用javaScript的IFrameShow方法，设置IFrame的可见状态   
51.             public function set showIFrame(display:Boolean):void  
52.             {   
53.                 ExternalInterface.call("IFrameShow",display);   
54.             }   
55.                
56.             public function get source(): String {     
57.                 return __source;     
58.             }     
59.             //重载了Canvas的visible属性，以便在Canvas隐藏HTML页面中的IFrame   
60.             override public function set visible(visible: Boolean): void    
61.             {   
62.                 super.visible=visible;   
63.                 if (visible)     
64.                 {     
65.                     ExternalInterface.call("showIFrame");     
66.                 }     
67.                 else     
68.                 {     
69.                     ExternalInterface.call("hideIFrame");     
70.                 }     
71.             }    
72.         ]]>   
73.     </mx:Script>   
74. </mx:Canvas>  

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" resize="callLater(moveIFrame)" move="callLater(moveIFrame)" initialize="init();">
		<mx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import flash.external.ExternalInterface;  
			import flash.geom.Point;  
			import flash.net.navigateToURL;  
			private var __source: String;
			
			//Flash场景0,0坐标 var localPt:Point = new Point(0, 0); 
			//转换为浏览器页面坐标 var globalPt:Point = this.localToGlobal(localPt);  
			//这样就可以在Flex页面中嵌入任意的HTML页面了，为了方便，
						public function moveIFrame():void
			{
				var localPoint:Point = new Point(0, 0);  
			    var globalPoint:Point = this.localToGlobal(localPoint);  
			    ExternalInterface.call("moveIFrame", globalPoint.x, globalPoint.y, this.width, this.height);  
			}
			
			//调用javaScript的loadIFrame方法，设置IFrame的src(URL)
			public function set source(source: String): void {  
			    if (source) 
			    {  
			        if (!ExternalInterface.available)  
			        {  
			           Alert.show("The ExternalInterface is not available in this container. Internet Explorer ActiveX, " + 
			           		"Firefox, Mozilla 1.7.5 and greater, or other browsers that support NPRuntime are required.");  
			       	}  
			       	__source = source; 
			       	//Alert.show(source); 
			       	ExternalInterface.call("loadIFrame",source);  
			   	}  
			} 
			
			//初始化时注册供javaScript调用的方法
			public function init():void
			{
				ExternalInterface.addCallback("IFrameOnBulr",showIFrameAgain);
			}
			
			//javaScript调用IFrameOnBlur方法时的处理方法
			public function showIFrameAgain():void
			{
				this.source=this.__source;
				this.showIFrame=true;
				this.moveIFrame();
			}
			
			//调用javaScript的IFrameShow方法，设置IFrame的可见状态
			public function set showIFrame(display:Boolean):void
			{
				ExternalInterface.call("IFrameShow",display);
			}
			
			public function get source(): String {  
            	return __source;  
       		}  
       		//重载了Canvas的visible属性，以便在Canvas隐藏HTML页面中的IFrame
			override public function set visible(visible: Boolean): void 
			{
	            super.visible=visible;
	            if (visible)  
	            {  
	                ExternalInterface.call("showIFrame");  
	            }  
	            else  
	            {  
	                ExternalInterface.call("hideIFrame");  
	            }  
	        } 
		]]>
	</mx:Script>
</mx:Canvas>

IFremaDemo.mxml文件如下：

Java代码

1. <?xml version="1.0" encoding="utf-8"?>   
2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:zq="*">   
3. <zq:IFrame mouseUp="Iframe.showIFrame=true;Iframe.moveIFrame();Iframe.source=Iframe.source" id="Iframe" source="http://weather.news.qq.com/inc/ss258.htm" x="240" y="23"  width="190" height="190"/>   
4. </mx:Application>  

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:zq="*">
<zq:IFrame mouseUp="Iframe.showIFrame=true;Iframe.moveIFrame();Iframe.source=Iframe.source" id="Iframe" source="http://weather.news.qq.com/inc/ss258.htm" x="240" y="23"  width="190" height="190"/>
</mx:Application>

当然少不了js代码，IFremaDemo.html网页是Flex Builder3自动生成的，然后需要加上以下代码：

Java代码

1. <script>   
2.     function moveIFrame(x,y,w,h) {     
3.        var frameRef=document.getElementById("myFrame");     
4.        frameRef.style.left=x;     
5.        frameRef.style.top=y;     
6.         }    
7.     function loadIFrame(url){     
8.          document.getElementById("myFrame").src=url;   
9.     }    
10.        
11.     function IFrameShow(display){   
12.     document.getElementById("myFrame").style.visibility=display?"visible":"hidden";        
13.     }   
14.        
15.     function IFrameOnBulr()   
16.     {   
17.         //根据id获取flash实例，ListDemo，可以从Embed   
18.         var flash = (navigator.appName.indexOf ("Microsoft") !=-1)?window["IFremaDemo"]:document["IFremaDemo"];   
19.         //调用ActionScript注册的回调方法   
20.         flash.IFrameOnBulr();   
21.     }   
22. </script>   
23. <iframe id="myFrame" name="myFrame" onblur="this.style.visibility='visible';IFrameOnBulr();" width="189" height="190" marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="no" style="position:absolute;"></iframe>