/// <summary>
        /// The constructor is private: loading screens should
        /// be activated via the static Load method instead.
        /// </summary>
        private LoadingScreen(ScreenManager screenManager, bool loadingIsSlow,
                              GameScreen[] screensToLoad)
        {
            _loadingIsSlow = loadingIsSlow;
            _screensToLoad = screensToLoad;

            // we don't serialize loading screens. if the user exits while the
            // game is at a loading screen, the game will resume at the screen
            // before the loading screen.
            IsSerializable = false;

            TransitionOnTime = TimeSpan.FromSeconds(0.5);
        }
        /// <summary>
        /// Activates the loading screen.
        /// </summary>
        public static void Load(ScreenManager screenManager, bool loadingIsSlow,
                                PlayerIndex? controllingPlayer,
                                params GameScreen[] screensToLoad)
        {
            // Tell all the current screens to transition off.
            foreach (GameScreen screen in screenManager.GetScreens())
                screen.ExitScreen();

            // Create and activate the loading screen.
            LoadingScreen loadingScreen = new LoadingScreen(screenManager,
                                                            loadingIsSlow,
                                                            screensToLoad);

            screenManager.AddScreen(loadingScreen, controllingPlayer);
        }
        /// <summary>
        /// The main game constructor.
        /// </summary>
        public NathanielGame()
        {
            _graphics = new GraphicsDeviceManager(this) {IsFullScreen = true};
            if (Services != null) StaticContent = new ContentManager(Services);
            TargetElapsedTime = TimeSpan.FromTicks(333333);
            // configure the content manager
            Content.RootDirectory = "Content";
            StaticContent.RootDirectory = "Content";

             InitializeLandscapeGraphics();
            //InitializePortraitGraphics();

            // Create the screen manager component.
            _screenManager = new ScreenManager(this);

            Components.Add(_screenManager);

            // attempt to deserialize the screen manager from disk. if that
            // fails, we add our default screens.
            if (_screenManager.DeserializeState()) return;
            // Activate the first screens.
            _screenManager.AddScreen(new BackgroundScreen(), null);
            _screenManager.AddScreen(new MainMenuScreen(), null);
        }