/// <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)
{
this.loadingIsSlow = loadingIsSlow;
this.screensToLoad = screensToLoad;
this.addNewScreen = false;
TransitionOnTime = TimeSpan.FromSeconds(0.5);
// If this is going to be a slow load operation, create a background
// thread that will update the network session and draw the load screen
// animation while the load is taking place.
if (loadingIsSlow)
{
backgroundThread = new Thread(BackgroundWorkerThread);
backgroundThreadExit = new ManualResetEvent(false);
graphicsDevice = screenManager.GraphicsDevice;
// Look up some services that will be used by the background thread.
IServiceProvider services = screenManager.Game.Services;
networkSession = (NetworkSession)services.GetService(
typeof(NetworkSession));
messageDisplay = (IMessageDisplay)services.GetService(
typeof(IMessageDisplay));
}
}
/// <summary>
/// Adds a new screen to the screen manager.
/// </summary>
public void AddScreen(GameScreen screen)
{
screen.ScreenManager = this;
screen.IsExiting = false;
// If we have a graphics device, tell the screen to load content.
if (isInitialized)
{
screen.LoadContent();
}
screens.Add(screen);
}
/// <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 (isInitialized)
{
screen.UnloadContent();
}
screens.Remove(screen);
screensToUpdate.Remove(screen);
}