package
{
 import flash.display.Sprite;
 import flash.events.MouseEvent;
 
 public class animation_ch04_DrawingApp extends Sprite
 {
  public function animation_ch04_DrawingApp()
  {
   init();
  }
  
//@ init(s)
  private function init():void
  {
   graphics.lineStyle(1);
   stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
   stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp);
  }
 //@ mouse(s) 
  private function onMouseDown(event:MouseEvent):void
  {
   graphics.moveTo(mouseX, mouseY);
   stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
  }
  
  private function onMouseUp(event:MouseEvent):void
  {
   stage.removeEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
  }
//@ move(s)  
  private function onMouseMove(event:MouseEvent):void
  {
   graphics.lineTo(mouseX, mouseY);
  }
 }
}