@Override
public void update(GameContainer gc, float delta) {
if (transitionOut != null) {
transitionOut.update(gc, delta);
if (transitionOut.isFinished()) {
if (currentScreen != null) {
currentScreen.postTransitionOut(transitionOut);
}
GameScreen oldScreen = currentScreen;
currentScreen = nextScreen;
nextScreen = null;
transitionOut = null;
if (transitionIn != null) {
currentScreen.preTransitionIn(transitionIn);
}
} else {
return;
}
}
if (transitionIn != null) {
transitionIn.update(gc, delta);
if (transitionIn.isFinished()) {
currentScreen.postTransitionIn(transitionIn);
transitionIn = null;
} else {
return;
}
}
currentScreen.update(gc, this, delta);
}
@Override
public void enterGameScreen(int id, Transition transitionOut, Transition transitionIn) {
if (transitionOut == null) {
transitionOut = new NullTransition();
}
if (transitionIn == null) {
transitionIn = new NullTransition();
}
this.transitionIn = transitionIn;
this.transitionOut = transitionOut;
this.nextScreen = gameScreens.get(id);
this.transitionOut.initialise(currentScreen, nextScreen);
if (currentScreen != null) {
currentScreen.preTransitionOut(transitionOut);
}
}
@Override
public void render(GameContainer gc, Graphics g) {
if (transitionOut != null) {
transitionOut.preRender(gc, g);
} else if (transitionIn != null) {
transitionIn.preRender(gc, g);
}
if (currentScreen != null) {
currentScreen.render(gc, g);
}
if (transitionOut != null) {
transitionOut.postRender(gc, g);
} else if (transitionIn != null) {
transitionIn.postRender(gc, g);
}
}
@Override
public void removeEntity(GameScreenEntity entity) {
gameScreens.remove(entity.getId());
}
@Override
public void addEntity(GameScreenEntity entity) {
gameScreens.put(entity.getId(), entity);
}
@Override
public void interpolate(GameContainer gc, float alpha) {
if (currentScreen != null) {
currentScreen.interpolate(gc, alpha);
}
}