package
  {
          import flash.display.Sprite;
          import flash.events.MouseEvent;
          
          public class @ax-animation-ch07-MouseMoveDrag extends Sprite
          {
                  private var ball:animation_ch07_Ball;
                  
                  public function @ax-animation-ch07-MouseMoveDrag()
                  {
                          init();
                  }
                  
                  private function init():void
                  {
                          ball = new animation_ch07_Ball();
                          ball.x = 100;
                          ball.y = 100;
                          addChild(ball);
                          ball.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
                  }
                  
                  private function onMouseDown(event:MouseEvent):void
                  {
                          stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp);
                          stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
                  }
                  
                  private function onMouseUp(event:MouseEvent):void
                  {
                          stage.removeEventListener(MouseEvent.MOUSE_UP, onMouseUp);
                          stage.removeEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
                  }
                  
                  private function onMouseMove(event:MouseEvent):void
                  {
                          ball.x = mouseX;
                          ball.y = mouseY;
                  }
          }
  }