flash on 2010-2-11

/**
 * Copyright peacelife_wonder ( http://wonderfl.net/user/peacelife_wonder )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/wZJd
 */

package {
    import flash.display.Sprite;    
    public class FlashTest extends Sprite {
    	        public function FlashTest() {
    	        	            var ball:Sprite= new BallSprite(0xFF9933);
    	        	                        ball.x = 50;
    	        	                        ball.y = 50            addChild( ball );
    	        	                       var moveBall:Sprite= new MoveBallSprite (0x000066);
    	        	                                   moveBall.x = 100;
    	        	                                   moveBall.y = 50            addChild( moveBall );                        var dropBall:Sprite= new DropBallSprite(0x006600);            dropBall.x = 150;            dropBall.y = 50            addChild( dropBall );                        var mouseTraceBall:Sprite= new MouseTracerBallSprite ( 0xFF3300 );            mouseTraceBall.x = 200;            mouseTraceBall.y = 50;            addChild( mouseTraceBall );                    }    }}
	import flash.display.*;
	import flash.events.*;
	class BallSprite extends Sprite {
		public function BallSprite( color:uint ){
			super();
			
			graphics.beginFill(color);
			graphics.drawCircle( 0, 0, 20 );
		}
	}
	class MoveBallSprite extends BallSprite {
		private var velocityX:Number = 8;
		private var velocityY:Number = 6;
		public function MoveBallSprite( color:uint ){
			super( color );
			addEventListener( Event.ENTER_FRAME,updatePosition );
		}
		private function updatePosition( e:Event ):void {
			x += velocityX;
			y += velocityY;
		}
	}
	class DropBallSprite extends MoveBallSprite{
		public var gravity:Number = 0,6;
		public function DropBallSprite ( color:uint ){
			super( color );
			addEventListener( Event.ENTER_FRAME, updateVelocity );
		}
		private function updateVelocity ( e:Event ):void {
			velocityY += gravity;
		}
	}
	class MouseTraceBallSprite extends MoveBallSprite{
		public function MouseTraceBallSprite ( color:unit ){
			super ( color );
			addEventListener( Event.ENTER_FRAME,updateVelocity );
		}
		private function updateVelocity ( e:Event ):void {
			velocityX = ( root.mouseX - x ) * 0.1;
			velocityY = ( rott.mouseY - y ) * 0.1;
		}
	}