private boolean isModifierKey(int key) {
		switch(key) {
		case Keyboard.KEY_LSHIFT:
		case Keyboard.KEY_RSHIFT:
		case Keyboard.KEY_RIGHT:
		case Keyboard.KEY_LEFT:
		case Keyboard.KEY_DOWN:
		case Keyboard.KEY_UP:
		case Keyboard.KEY_LCONTROL:
		case Keyboard.KEY_RCONTROL:
			return true;
		default:
			return false;
		}
	}