[AS3]as3画笔实例实现橡皮擦功能源代码

[AS3]as3画笔实例实现橡皮擦功能源代码

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//主容器 var main:Sprite = new Sprite(); main.mouseEnabled = false; addChild(main) //临时容器(所有操作都将先画在临时容器里,再进行"画"或"擦") var mc:Sprite = new Sprite() main.addChild(mc) //保存最终画出来的内容的bitmapdata var content:BitmapData = new BitmapData(550,400,true,0x00FFFFFF); //把content显示出来 var show:Bitmap = new Bitmap(content) main.addChildAt(show,0)    //默认选中画笔 var action:Number = 0 txt.text = "当前选中:画笔"       mc_move.addEventListener(MouseEvent.MOUSE_DOWN,startDraw) a.addEventListener(MouseEvent.CLICK,changeAction) b.addEventListener(MouseEvent.CLICK,changeAction) function changeAction(e:MouseEvent):void {     if(e.target.name == "a")     {         action = 0         txt.text = "当前选中:画笔"         mc.visible = true     }else     {         action = 1         txt.text = "当前选中:橡皮"         mc.visible = false     } } function startDraw(e:MouseEvent):void {     mc.graphics.lineStyle(20,cp.selectedColor);     mc.graphics.moveTo(mouseX,mouseY);     mc_move.addEventListener(MouseEvent.MOUSE_MOVE,drawing);     stage.addEventListener(MouseEvent.MOUSE_UP,stopDraw); } function stopDraw(e:MouseEvent):void {     if(action!=1)content.draw(mc,new Matrix(),new ColorTransform(),BlendMode.NORMAL,new Rectangle(0,0,550,400))     mc.graphics.clear()     mc_move.removeEventListener(MouseEvent.MOUSE_MOVE,drawing);     stage.removeEventListener(MouseEvent.MOUSE_UP,stopDraw); } function drawing(e:MouseEvent):void {     mc.graphics.lineTo(mouseX,mouseY)     if(action==1)content.draw(mc,new Matrix(),new ColorTransform(),BlendMode.ERASE)     e.updateAfterEvent() }

 

[AS3]as3画笔实例实现橡皮擦功能源代码