添加鼠标事件 ----简单画图程序

package {
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	[SWF(width="800",height="600",backgroundColor="#ffffff",frameRate="56")]
	public class example extends Sprite
	{
		private var _sprite:Sprite;
		
		public function example()
		{
			_sprite = new Sprite();
			addChild(_sprite);
			_sprite.graphics.beginFill(0xffffff);
			_sprite.graphics.drawRect(0,0,400,400);
			_sprite.graphics.endFill();
			
			_sprite.addEventListener(MouseEvent.MOUSE_DOWN,onMouseDown);
			_sprite.addEventListener(MouseEvent.MOUSE_UP,onMouseUp);
			
		}
		
		private function onMouseDown(event:MouseEvent):void{
			_sprite.graphics.lineStyle(1,0,1);
			_sprite.graphics.moveTo(mouseX,mouseY);
			_sprite.addEventListener(MouseEvent.MOUSE_MOVE,onMouseMove);
		}
		
		private function onMouseUp(event:MouseEvent):void{
			_sprite.removeEventListener(MouseEvent.MOUSE_OVER,onMouseMove);
		}
		
		private function onMouseMove(event:MouseEvent):void{
			_sprite.graphics.lineTo(mouseX,mouseY);
		}
	}
}

资源来自cookbook文档