/// <summary>
/// Begins the asynchronous process of joining a game from an invitation.
/// </summary>
void NetworkSession_InviteAccepted(object sender, InviteAcceptedEventArgs e)
{
if (Guide.IsTrialMode)
{
screenManager.invited = e.Gamer;
string message = "Need to unlock full version before you can accept this invite.";
MessageBoxScreen messageBox = new MessageBoxScreen(message);
screenManager.AddScreen(messageBox);
System.Console.WriteLine("Cannot accept invite yet because we're in trial mode");
return;
}
// We will join the game from a method in this screen.
MainMenuScreen mainMenu = null;
// Keep the background screen and main menu screen but remove all others
// to prepare for joining the game we were invited to.
foreach (GameScreen screen in screenManager.GetScreens())
{
if (screen is BackgroundScreen)
{
continue;
}
else if (screen is MainMenuScreen)
{
mainMenu = screen as MainMenuScreen;
}
else
{
// If there's an active network session, we'll need to end it
// before attempting to join a new one.
MethodInfo method = screen.GetType().GetMethod("EndSession");
if (method != null)
{
method.Invoke(screen, null);
}
// Now exit and remove this screen.
screen.ExitScreen();
screenManager.RemoveScreen(screen);
}
}
// Now attempt to join the game to which we were invited!
if (mainMenu != null)
{
mainMenu.JoinInvitedGame();
}
}
/// <summary>
/// Activates the loading screen.
/// </summary>
public static void Load(ScreenManager screenManager,
EventHandler<EventArgs> loadNextScreen,
bool loadingIsSlow)
{
// 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();
loadingScreen.loadingIsSlow = loadingIsSlow;
loadingScreen.loadNextScreen = loadNextScreen;
screenManager.AddScreen(loadingScreen);
}
/// <summary>
/// Activates the loading screen.
/// </summary>
public static void Load(ScreenManager screenManager,
EventHandler <EventArgs> loadNextScreen,
bool loadingIsSlow)
{
// 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();
loadingScreen.loadingIsSlow = loadingIsSlow;
loadingScreen.loadNextScreen = loadNextScreen;
screenManager.AddScreen(loadingScreen);
}
/// <summary>
/// Draws the loading screen.
/// </summary>
public override void Draw(GameTime gameTime)
{
// If we are the only active screen, that means all the previous screens
// must have finished transitioning off. We check for this in the Draw
// method, rather than in Update, because it isn't enough just for the
// screens to be gone: in order for the transition to look good we must
// have actually drawn a frame without them before we perform the load.
if ((ScreenState == ScreenState.Active) &&
(ScreenManager.GetScreens().Length == 1))
{
otherScreensAreGone = true;
}
// The gameplay screen takes a while to load, so we display a loading
// message while that is going on, but the menus load very quickly, and
// it would look silly if we flashed this up for just a fraction of a
// second while returning from the game to the menus. This parameter
// tells us how long the loading is going to take, so we know whether
// to bother drawing the message.
if (loadingIsSlow)
{
const string message = "Loading...";
// Center the text in the viewport.
Viewport viewport = ScreenManager.GraphicsDevice.Viewport;
Vector2 viewportSize = new Vector2(viewport.Width, viewport.Height);
Vector2 textSize = ScreenManager.Font.MeasureString(message);
Vector2 textPosition = (viewportSize - textSize) / 2;
Color color = new Color(255, 255, 255, TransitionAlpha);
// Draw the text.
ScreenManager.SpriteBatch.Begin();
ScreenManager.SpriteBatch.DrawString(ScreenManager.Font, message,
textPosition, color);
ScreenManager.SpriteBatch.End();
}
}
