/// <summary>
/// Removes a screen from the screen manager. You should normally
/// use GameScreen.ExitScreen instead of calling this directly, so
/// the screen can gradually transition off rather than just being
/// instantly removed.
/// </summary>
/// <param name="screen">The added screen.</param>
public void RemoveScreen(GameScreen screen)
{
// If we have a graphics device, tell the screen to unload content.
if (isInitialized)
{
screen.UnloadContent();
}
screens.Remove(screen);
screensToUpdate.Remove(screen);
}
/// <summary>
/// Adds a new screen to the screen manager.
/// </summary>
/// <param name="screen">The screen.</param>
/// <exception cref="ArgumentNullException">screen parameter was null</exception>
public void AddScreen(GameScreen screen)
{
if (screen == null)
{
throw new ArgumentNullException("screen");
}
screen.ScreenManager = this;
screen.IsExiting = false;
// If we have a graphics device, tell the screen to load content.
if (isInitialized)
{
screen.LoadContent();
}
screens.Add(screen);
}
