用AS3做最简单的绘图版

步骤：

画板->图形

var 画板:Sprite;

画板.drawRect;//画背景

var 图形:Shape;

画板.addChild(图形);

画板监听鼠标事件

在事件监听器里让图形去绘制

图形.graphics.moveTo(this.mouseX, this.mouseY);

code:

 1 package
 2 {
 3     import flash.display.Shape;
 4     import flash.display.Sprite;
 5     import flash.events.MouseEvent;
 6     /**
 7      * ...
 8      * @author sange
 9      */
10     public class DrawingBoard extends Sprite
11     {
12         private var mySprite:Sprite;
13         private var myShape:Shape;
14         public function DrawingBoard() 
15         {
16             init();
17         }
18         
19         private function init():void
20         {
21             this.mySprite = new Sprite();            
22             addChild(this.mySprite);
23             this.mySprite.graphics.beginFill(0x336699);
24             this.mySprite.graphics.drawRect(0, 0, 550, 400);
25             this.mySprite.graphics.endFill();
26             this.mySprite.addEventListener(MouseEvent.MOUSE_DOWN, mySpriteMouseDownHandler);
27             this.mySprite.addEventListener(MouseEvent.MOUSE_UP, mySpriteMouseUpHandler);
28             
29             this.myShape = new Shape();
30             mySprite.addChild(myShape);
31         }
32         // 鼠标按下事件
33         private function mySpriteMouseDownHandler(event:MouseEvent):void
34         {
35             this.myShape.graphics.lineStyle(1, 0x00FF00, 1);
36             this.myShape.graphics.moveTo(this.mouseX, this.mouseY);            
37             this.mySprite.addEventListener(MouseEvent.MOUSE_MOVE, mySpriteMouseMoveHandler);
38         }
39  
40         // 鼠标离开事件
41         private function mySpriteMouseUpHandler(event:MouseEvent):void
42         {
43             this.mySprite.removeEventListener(MouseEvent.MOUSE_MOVE, mySpriteMouseMoveHandler);
44         }
45          
46         // 移动事件
47         private function  mySpriteMouseMoveHandler(event:MouseEvent):void
48         {
49             this.myShape.graphics.lineTo(mouseX, mouseY);
50         }
51     }
52 }