// Push a gamescreen on top of the stack
public void PushGameScreen(GameScreen gameScreen)
{
//Throw exception if the GameScreen is already in use
if (gameScreen.Engine != null)
{
throw new Exception ("This GameScreen already exists on the stack of another " +
"Engine instance");
}
if (!gameScreens.Contains(gameScreen))
{
gameScreens.Add(gameScreen);
gameScreen.engine = this;
gameScreen.LoadGameScreen();
if (OnScreenChange != null)
OnScreenChange(this, new ScreenEventArgs(gameScreen));
}
}
// less code with this :)
public void ChangeGameScreen(GameScreen screen)
{
PopGameScreen();
PushGameScreen(screen);
}