A screen is a single layer that has update and draw logic, and which can be combined with other layers to build up a complex menu system. For instance the main menu, the options menu, the "are you sure you want to quit" message box, and the main game itself are all implemented as screens.
This public class is similar to one in the GameStateManagement sample.
GameScreen Class Documentation
Exemple #1
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        /// <summary>
        /// Removes a screen from the screen manager. You should normally
        /// use GameScreen.ExitScreen instead of calling this directly, so
        /// the screen can gradually transition off rather than just being
        /// instantly removed.
        /// </summary>
        public void RemoveScreen(GameScreen screen)
        {
            // If we have a graphics device, tell the screen to unload content.
            if ((graphicsDeviceService != null) &&
                (graphicsDeviceService.GraphicsDevice != null))
            {
                screen.UnloadContent();
            }

            screens.Remove(screen);
            screensToUpdate.Remove(screen);
        }
Exemple #2
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        /// <summary>
        /// Adds a new screen to the screen manager.
        /// </summary>
        public void AddScreen(GameScreen screen)
        {
            screen.ScreenManager = this;

            // If we have a graphics device, tell the screen to load content.
            if ((graphicsDeviceService != null) &&
                (graphicsDeviceService.GraphicsDevice != null))
            {
                screen.LoadContent();
            }

            screens.Add(screen);
        }