flex3 开门效果

<?xml version="1.0" encoding="utf-8"?>  
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"  
    xmlns:eff="com.adobe.ac.mxeffects.*"    
    paddingBottom="0" paddingLeft="0" paddingTop="0" paddingRight="0"  
    horizontalAlign="center" verticalAlign="middle" xmlns="*" viewSourceURL="srcview/index.html">  
  
  <mx:Script>  
       <![CDATA[  
           import com.adobe.ac.mxeffects.Gate;  
           import com.adobe.ac.mxeffects.Flip;  
           import mx.effects.Sequence;  
           import mx.effects.Parallel;  
           import mx.effects.Resize;  
           import mx.effects.Fade;  
           import mx.effects.Iris;  
           import com.adobe.ac.mxeffects.DistortionConstants;  
             
           private const min_width:int = 350;  
           private const min_height:int = 200;  
 
           public function gotoChatRoom() : void {  
              var mySequence:Sequence = new Sequence();  
 
              var gate:Gate = new Gate(login);  
              gate.siblings = [ chatRoom ];  
              gate.direction = DistortionConstants.LEFT;      
              gate.smooth = true;  
              gate.distortion = 10;  
              gate.mode = Gate.OPEN;  
              gate.duration = 1000;  
              mySequence.addChild(gate);  
              
              var parallel:Parallel = new Parallel();  
              var resize:Resize = new Resize();  
              resize.target = loginStack;  
              resize.widthTo = this.width-20;  
              resize.heightTo = this.height-20;  
              resize.duration = 1000;  
              parallel.addChild(resize);  
                
              resize = new Resize();  
              resize.target = chatRoom;  
              resize.widthTo = this.width-20;  
              resize.heightTo = this.height-20;  
              resize.duration = 1000;  
              parallel.addChild(resize);               
              mySequence.addChild(parallel);  
                
              mySequence.play();  
           }  
             
           public function gotoLogin() : void {  
              var mySequence:Sequence = new Sequence();  
 
              var gate:Gate = new Gate(chatRoom);  
              gate.siblings = [ login ];  
              gate.direction = DistortionConstants.LEFT;      
              gate.smooth = true;  
              gate.distortion = 10;  
              gate.mode = Gate.CLOSE;  
              gate.duration = 1000;  
              mySequence.addChild(gate);  
              
              var parallel:Parallel = new Parallel();  
              var resize:Resize = new Resize();  
              resize.target = loginStack;  
              resize.widthTo = min_width;  
              resize.heightTo = min_height;  
              resize.duration = 1000;  
              parallel.addChild(resize);  
                
              resize = new Resize();  
              resize.target = chatRoom;  
              resize.widthTo = min_width;  
              resize.heightTo = min_height;  
              resize.duration = 1000;  
              parallel.addChild(resize);               
              mySequence.addChild(parallel);  
                
              mySequence.play();  
           }  
       ]]>  
  
    </mx:Script>  
       
    <mx:Style source="/assets/OSX.css"/>  
  
    <mx:VBox>  
    <mx:ViewStack id="loginStack" width="350" height="200">  
      <mx:Panel id="login" title="Login" horizontalAlign="center"    
        verticalAlign="middle" backgroundColor="0xAAAAAA" >         
        <mx:Form >           
            <mx:FormItem label="Username">  
                <mx:TextInput id="userName" />  
            </mx:FormItem>               
            <mx:FormItem label="Password">  
                <mx:TextInput displayAsPassword="true" id="password"    
                  enter="gotoChatRoom();"/>  
            </mx:FormItem>         
            <mx:FormItem>  
                <mx:Button label="Login" click="gotoChatRoom();" />  
            </mx:FormItem>           
        </mx:Form>           
      </mx:Panel>  
         
      <mx:Panel id="chatRoom" title="Chat Room" >             
        <mx:VBox width="100%" height="100%">  
          <mx:TextArea id="log" fontSize="12" width="100%" height="100%"    
            editable="false" />  
        </mx:VBox>  
        <mx:ControlBar>  
          <mx:TextInput id="msg" width="100%" fontSize="12" enter=""/>  
            <mx:Button label="Send" click="" />    
            <mx:Button label="Logout" click="gotoLogin()" />    
        </mx:ControlBar>         
      </mx:Panel>  
    </mx:ViewStack>  
    </mx:VBox>  
  
</mx:Application>