@Override
	public void onKeyUp(int key)
	{
		if (currentScreen == null)
			return;

		if (currentScreen instanceof IReceiveKeyUpEvent)
			((IReceiveKeyUpEvent) currentScreen).onKeyUp(key);

		for (IRenderable renderable : currentScreen.getComponents())
			if (renderable instanceof IReceiveKeyUpEvent)
				((IReceiveKeyUpEvent) renderable).onKeyUp(key);
	}