Flex实现动态线条绘制与交互

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
        <![CDATA[
            import mx.effects.Move;
            import mx.controls.*;
            import mx.core.*;
            import mx.effects.*;
            public var lines :Sprite =  new Sprite ();
            public var lines1 :flash.display.Sprite =  new Sprite ();
            

            
            public function TestPaint():void
            {
                //Alert.show("Hello World!");
                lines.graphics.lineStyle(2,0x0099ff,1);
                DrawLine(lines,lbl,btn1);
                DrawLine(lines,lbl,btn2);
                DrawLine(lines,lbl,btn3);
                   var comp: UIComponent = new UIComponent();
                   comp.addChild(lines);
                   addChild(comp);
            }
            
            public function DrawLine(lines:Sprite,uFrom:UIComponent,uTo:UIComponent):void
            {
                lines.graphics.moveTo(uFrom.x+uFrom.width/2,uFrom.y+uFrom.height/2);
                lines.graphics.lineTo(uTo.x+uTo.width/2,uTo.y+uTo.height/2);
            }