DragManager拖拉控制

讨厌的DragManager

 

在一个容器上覆盖了层，透明png，然后容器里面就接受不到drag的任何事件了。翻看flex框架代码发现是在DragProxy里面做的判断，还是没有对drag忽略的代码。

 

没辙了，只好用MouseMove来做了：

1. <?xml version="1.0"?>   
2. <!-- Simple example to demonstrate the ComboBox control. -->   
3. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:local="*"    
4.     applicationComplete="applicationCompleteHandler()">   
5.     <mx:Canvas id="ppp" width="440" height="267"  backgroundColor="#FFFFFF"  
6.         blendMode="{BlendMode.LAYER}">   
7.       <mx:Image  source="Creek.jpg"    
8.         maintainAspectRatio="false"  
9.          mouseEnabled="false" mouseChildren="false" width="100%" height="100%"/>   
10.      <mx:Canvas id="c" width="80%" height="80%"  
11.          horizontalCenter="0" verticalCenter="0" borderStyle="solid" borderThickness="20"    
12.          borderColor="#33003E" backgroundColor="#E8E8E8"/>   
13.      <local:DragIgnoreImage   
14.          mouseEnabled="false" mouseChildren="false" width="100%" height="100%"/>        
15.     </mx:Canvas>   
16.     <mx:Image id="p" width="100" height="100" source="Desert Landscape.jpg" mouseDown="imageMouseDownHandler(event)"/>   
17.         <mx:List dragEnabled="true">    
18.         <mx:dataProvider>   
19.             <mx:String>AK</mx:String>   
20.             <mx:String>AL</mx:String>   
21.             <mx:String>AR</mx:String>   
22.         </mx:dataProvider>   
23.     </mx:List>   
24.     <mx:Script>   
25.         <![CDATA[   
26.             import mx.core.IFlexDisplayObject;   
27.             import mx.core.DragSource;   
28.             import mx.core.UIComponent;   
29.             import mx.events.DragEvent;   
30.             import mx.managers.DragManager;   
31.             private function applicationCompleteHandler():void {   
32.                 stage.addEventListener(MouseEvent.MOUSE_DOWN,stageMousedownhandler);   
33.             }   
34.                
35.             private function stageMousedownhandler(e:MouseEvent):void {   
36.                 stage.addEventListener(MouseEvent.MOUSE_MOVE,stageMouseMovehandler);   
37.                 stage.addEventListener(MouseEvent.MOUSE_UP,stageMouseUpHandler);   
38.             }   
39.                
40.             private function stageMouseMovehandler(e:MouseEvent):void {   
41.                 var p:Point = new Point(e.stageX,e.stageY);   
42.                 p = c.globalToLocal(p);   
43.                    
44.                 if(DragManager.isDragging) {   
45.                     if(c.getBounds(c).containsPoint(p)) {   
46.                         c.setStyle("backgroundColor",0xFFFFF000);   
47.                     }   
48.                     else {   
49.                          c.setStyle("backgroundColor",0xFF00F000);   
50.                     }   
51.                 }   
52.             }   
53.                
54.             private function stageMouseUpHandler(e:MouseEvent):void {   
55.                 stage.removeEventListener(MouseEvent.MOUSE_MOVE,stageMouseMovehandler);   
56.                 stage.removeEventListener(MouseEvent.MOUSE_UP,stageMouseUpHandler);   
57.             }   
58.                
59.             private function imageMouseDownHandler(e:MouseEvent):void {   
60.                 var dragInitiator:Image=p;   
61.                 var ds:DragSource = new DragSource();   
62.                 ds.addData(dragInitiator, "img");                  
63.                    
64.                 var d:Image = new Image();   
65.                 d.width = d.height = 100;   
66.                 d.source = p.source;   
67.                 DragManager.doDrag(dragInitiator, ds, e,d);   
68.             }   
69.         ]]>   
70.     </mx:Script>