/// <summary>
        /// Event handler for when the Quit Game menu entry is selected.
        /// </summary>
        void QuitGameMenuEntrySelected(object sender, PlayerIndexEventArgs e)
        {
            const string message = "Are you sure you want to quit?";

            MessageBoxScreen confirmQuitMessageBox = new MessageBoxScreen(message);

            confirmQuitMessageBox.Accepted += ConfirmQuitMessageBoxAccepted;

            ScreenManager.AddScreen(confirmQuitMessageBox, ControllingPlayer);
        }
 /// <summary>
 /// Event handler for when the Sound menu entry is selected.
 /// </summary>
 void SoundMenuEntrySelected(object sender, PlayerIndexEventArgs e)
 {
     playSound = !playSound;
     SetMenuEntryText();
 }
 /// <summary>
 /// Event handler for when the Screen menu entry is selected.
 /// </summary>
 void ScreenMenuEntrySelected(object sender, PlayerIndexEventArgs e)
 {
     fullScreen = !fullScreen;
     SetMenuEntryText();
 }
 /// <summary>
 /// Event handler for when the Control menu entry is selected.
 /// </summary>
 void ControlsMenuEntrySelected(object sender, PlayerIndexEventArgs e)
 {
     controlsInvert = !controlsInvert;
     SetMenuEntryText();
 }
 /// <summary>
 /// Event handler for when the Play Game menu entry is selected.
 /// </summary>
 void PlayGameMenuEntrySelected(object sender, PlayerIndexEventArgs e)
 {
     LoadingScreen.Load(ScreenManager, true, e.PlayerIndex,
                        new GameplayScreen());
 }
 /// <summary>
 /// Event handler for when the Options menu entry is selected.
 /// </summary>
 void OptionsMenuEntrySelected(object sender, PlayerIndexEventArgs e)
 {
     ScreenManager.AddScreen(new OptionsMenuScreen(), e.PlayerIndex);
 }
 /// <summary>
 /// Event handler for when the user selects ok on the "are you sure
 /// you want to exit" message box.
 /// </summary>
 void ConfirmExitMessageBoxAccepted(object sender, PlayerIndexEventArgs e)
 {
     ScreenManager.Game.Exit();
 }
 /// <summary>
 /// Helper overload makes it easy to use OnCancel as a MenuEntry event handler.
 /// </summary>
 protected void OnCancel(object sender, PlayerIndexEventArgs e)
 {
     OnCancel(e.PlayerIndex);
 }
 /// <summary>
 /// Event handler for when the user selects ok on the "are you sure
 /// you want to quit" message box. This uses the loading screen to
 /// transition from the game back to the main menu screen.
 /// </summary>
 void ConfirmQuitMessageBoxAccepted(object sender, PlayerIndexEventArgs e)
 {
     LoadingScreen.Load(ScreenManager, false, null, new BackgroundScreen(),
                                                    new MainMenuScreen());
 }