Waiting on a Swing Timer To Finish

Question

This is my first post so if I've done something wrong I am very sorry. I am Trying to move a sprite across the screen when the user pushes a JButton. To accomplish this I am using a swing timer the problem is I need to execute some method after the animation is finished, but since both the animation and the other code run on the EDT the code I place after the animation executes first. I've tried using threads, but that did not help. I have included an example below, thanks in advance.
// called by the JButton's ActionListener
public void actionPerformed(ActionEvent e)
     methodToBeCalledBeforeAnimation();
     animateSprite(x_start, y_start, x_end, y_end, mySprite);
     methodToBeCalledAfterAnimation();
public void animateSprite(x_start, y_start, x_end, y_end, Sprite sprite)
     int delay= 10;
     if (getTimer()!= null) return;
          class Animator implements ActionListener
               int maxFrames= 50;
               int frames= 0;
               int x_start;
               int y_start;
               int x_end;
               int y_end;
               int width;
               int height;
                  Sprite sprite
               double x_curr;
               double y_curr;
               public Animator(int x_start, int y_start, int x_end, int y_end, int width,
                                  int height, Sprite sprite)
                    this.x_start= x_start;
                    this.y_start= y_start;
                    this.x_end= x_end;
                    this.y_end= y_end;
                    this.width= width;
                    this.height= height;
                    this.sprite= sprite;
                    sprite.setHeight(height);
                    sprite.setWidth(width);
                    x_curr= x_start;
                    y_curr= y_start;
               public void actionPerformed(ActionEvent evt)
                    x_curr= (double)sprite.getX()+(double)x_end/(double)maxFrames;
                    y_curr= (double)sprite.getY()+(double)y_end/(double)maxFrames;
                    sprite.setX((int)x_curr);
                    sprite.setY((int)y_curr);
                                // sprite is drawn in paintComponent
                    repaint();
                    frames++;
                    if (frames==maxFrames)
                         getTimer().stop();
                         setTimer(null);
                         repaint();
          setTimer(new Timer(delay, new Animator(x_start, y_start, x_end, y_end, width,
                                            height, card)));
          getTimer().start();
          return;
}Edited by: Pherpq on Jul 18, 2008 5:53 PM

Answer 1

Hi,
try to change the method from
// FROM:
     public void actionPerformed(ActionEvent e)
          methodToBeCalledBeforeAnimation();
                    animateSprite(x_start, y_start, x_end, y_end, mySprite);
                    methodToBeCalledAfterAnimation();
// TO:
  //      called by the JButton's ActionListener
     public void actionPerformed(ActionEvent e)
          methodToBeCalledBeforeAnimation();
          animateSprite(x_start, y_start, x_end, y_end, mySprite);
                       TimerQueue is a thread so wait for this thread to die before you
                      continue
          if(getTimer()!= null) {
               getTimer().timerQueue().join();
          methodToBeCalledAfterAnimation();
     }I will not comment on the design approach for the method animateSprite(x_start, y_start, x_end, y_end, mySprite); since this is out of scope for this post.
I hope this could help.
Regards,
Alan Mehio
London, UK
Edited by: alan_mehio on 21-Jul-2008 11:34