/// <summary>
        /// Constructor fills in the menu contents.
        /// </summary>
        public OptionsMenuScreen()
            : base("Options Menu")
        {
            // Create our menu entries.
            //MenuEntry donwloadMenuEntry = new MenuEntry("Download now");
            MenuEntry exitMenuEntry = new MenuEntry("Back");

            // Hook up menu event handlers.
            //donwloadMenuEntry.Selected += OnDownload;
            exitMenuEntry.Selected += OnCancel;

            // Add entries to the menu.
            //MenuEntries.Add(donwloadMenuEntry);
            MenuEntries.Add(exitMenuEntry);
        }
        /// <summary>
        /// Constructor.
        /// </summary>
        public PauseMenuScreen()
            : base("Paused")
        {
            // Flag that there is no need for the game to transition
            // off when the pause menu is on top of it.
            IsPopup = true;

            // Create our menu entries.
            MenuEntry resumeGameMenuEntry = new MenuEntry("Resume Game");
            MenuEntry quitGameMenuEntry = new MenuEntry("Quit Game");

            // Hook up menu event handlers.
            resumeGameMenuEntry.Selected += OnCancel;
            quitGameMenuEntry.Selected += QuitGameMenuEntrySelected;

            // Add entries to the menu.
            MenuEntries.Add(resumeGameMenuEntry);
            MenuEntries.Add(quitGameMenuEntry);
        }
        /// <summary>
        /// Constructor fills in the menu contents.
        /// </summary>
        public TestEnginesMenuScreen()
            : base("Test Engines Menu")
        {
            // Create our menu entries.
            MenuEntry battleEngineMenuEntry = new MenuEntry("Battle Engine");
            MenuEntry platformerEngineMenuEntry = new MenuEntry("Platformer Style Engine");
            MenuEntry clickEngineMenuEntry = new MenuEntry("Point and Click Engine");
            MenuEntry exitMenuEntry = new MenuEntry("Back");

            // Hook up menu event handlers.
            battleEngineMenuEntry.Selected += OnBattleEngine;
            platformerEngineMenuEntry.Selected += OnPlatformerEngine;
            clickEngineMenuEntry.Selected += OnClickEngine;
            exitMenuEntry.Selected += OnCancel;

            // Add entries to the menu.
            MenuEntries.Add(battleEngineMenuEntry);
            MenuEntries.Add(platformerEngineMenuEntry);
            MenuEntries.Add(clickEngineMenuEntry);
            MenuEntries.Add(exitMenuEntry);
        }
        /// <summary>
        /// Constructor fills in the menu contents.
        /// </summary>
        public MainMenuScreen()
            : base("Main Menu")
        {
            // Create our menu entries.
            MenuEntry playGameMenuEntry = new MenuEntry("Play Game");
            MenuEntry testEnginesMenuEntry = new MenuEntry("Test Engines");
            MenuEntry optionsMenuEntry = new MenuEntry("Options");
            MenuEntry exitMenuEntry = new MenuEntry("Exit");

            // Hook up menu event handlers.
            playGameMenuEntry.Selected += PlayGameMenuEntrySelected;
            testEnginesMenuEntry.Selected += TestEnginesMenuEntrySelected;
            optionsMenuEntry.Selected += OptionsMenuEntrySelected;
            exitMenuEntry.Selected += OnCancel;

            // Add entries to the menu.
            MenuEntries.Add(playGameMenuEntry);
            MenuEntries.Add(testEnginesMenuEntry);
            MenuEntries.Add(optionsMenuEntry);
            MenuEntries.Add(exitMenuEntry);
        }