/**
* Plays the animation once.
*
* @param forward whether the animation should be played forward.
*/
private void playOnce(boolean forward) throws InterruptedException {
int n = animation.getFrameCount();
for (int i = 0; i < n; i++) {
int frame = forward ? i : n - i - 1;
animation.showFrame(frame);
if (Thread.interrupted()) {
throw new InterruptedException("Play job interrupted.");
}
Thread.sleep(animation.getFrameDisplayTime(frame));
}
}
