/// <summary>
/// Activates the loading screen.
/// </summary>
public static void Load(ScreenManager screenManager, bool loadingIsSlow,
params GameScreen[] screensToLoad)
{
// 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(screenManager,
loadingIsSlow,
screensToLoad);
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)
{
SpriteBatch spriteBatch = ScreenManager.SpriteBatch;
SpriteFont font = ScreenManager.Font;
string message = Resources.Loading;
// Center the text in the viewport.
Viewport viewport = ScreenManager.GraphicsDevice.Viewport;
Vector2 viewportSize = new Vector2(viewport.Width, viewport.Height);
Vector2 textSize = font.MeasureString(message);
Vector2 textPosition = (viewportSize - textSize) / 2;
Color color = new Color(255, 255, 255, TransitionAlpha);
// Animate the number of dots after our "Loading..." message.
loadAnimationTimer += gameTime.ElapsedGameTime;
int dotCount = (int)(loadAnimationTimer.TotalSeconds * 5) % 10;
message += new string('.', dotCount);
// Draw the text.
spriteBatch.Begin();
spriteBatch.DrawString(font, message, textPosition, color);
spriteBatch.End();
}
}
/// <summary>
/// Activates the loading screen.
/// </summary>
public static void Load(ScreenManager screenManager, bool loadingIsSlow,
params GameScreen[] screensToLoad)
{
// 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(screenManager,
loadingIsSlow,
screensToLoad);
screenManager.AddScreen(loadingScreen);
}
void LeaveSessionFromGame(AudioManager audioManager)//Audio audioHelper)
{
// Remove the NetworkSessionComponent.
Game.Components.Remove(this);
// Remove the NetworkSession service.
Game.Services.RemoveService(typeof(NetworkSession));
// Dispose the NetworkSession.
networkSession.Dispose();
networkSession = null;
// If we have a sessionEndMessage string explaining why the session has
// ended (maybe this was a network disconnect, or perhaps the host kicked
// us out?) create a message box to display this reason to the user.
MessageBoxScreen messageBox;
if (!string.IsNullOrEmpty(sessionEndMessage))
{
messageBox = new MessageBoxScreen(sessionEndMessage, false);
}
else
{
messageBox = null;
}
// At this point we normally want to return the user all the way to the
// main menu screen. But what if they just joined a session? In that case
// they went through this flow of screens:
//
// - MainMenuScreen
// - CreateOrFindSessionsScreen
// - JoinSessionScreen (if joining, skipped if creating a new session)
// - LobbyScreeen
//
// If we have these previous screens on the history stack, and the user
// backs out of the LobbyScreen, the right thing is just to pop off the
// LobbyScreen and JoinSessionScreen, returning them to the
// CreateOrFindSessionsScreen (we cannot just back up to the
// JoinSessionScreen, because it contains search results that will no
// longer be valid). But if the user is in gameplay, or has been in
// gameplay and then returned to the lobby, the screen stack will have
// been emptied.
//
// To do the right thing in both cases, we scan through the screen history
// stack looking for a CreateOrFindSessionScreen. If we find one, we pop
// any subsequent screens so as to return back to it, while if we don't
// find it, we just reset everything and go back to the main menu.
GameScreen[] screens = screenManager.GetScreens();
// Look for the CreateOrFindSessionsScreen.
for (int i = 0; i < screens.Length; i++)
{
if (screens[i] is CreateOrFindSessionScreen)
{
// If we found one, pop everything since then to return back to it.
for (int j = i + 1; j < screens.Length; j++)
{
screens[j].ExitScreen();
}
// Display the why-did-the-session-end message box.
if (messageBox != null)
{
screenManager.AddScreen(messageBox);
}
return;
}
}
// If we didn't find a CreateOrFindSessionsScreen, reset everything and
// go back to the main menu. The why-did-the-session-end message box
// will be displayed after the loading screen has completed.
LoadingScreen.Load(screenManager, false, new BackgroundScreen(NetworkSessionComponent.Level.shipMap),
new MainMenuScreen(),
messageBox);
}