/// <summary>
/// Public method called when the user wants to leave the network session.
/// Displays a confirmation message box, then disposes the session, removes
/// the NetworkSessionComponent, and returns them to the main menu screen.
/// </summary>
public static void LeaveSession(ScreenManager screenManager)
{
// Search through Game.Components to find the NetworkSessionComponent.
foreach (IGameComponent component in screenManager.Game.Components)
{
NetworkSessionComponent self = component as NetworkSessionComponent;
if (self != null)
{
// Display a message box to confirm the user really wants to leave.
string message;
if (self.networkSession.IsHost)
{
message = Resources.ConfirmEndSession;
}
else
{
message = Resources.ConfirmLeaveSession;
}
MessageBoxScreen confirmMessageBox = new MessageBoxScreen(message);
// Hook the messge box ok event to actually leave the session.
confirmMessageBox.Accepted += delegate
{
self.LeaveSession();
};
screenManager.AddScreen(confirmMessageBox);
break;
}
}
}
/// <summary>
/// Event handler for when the Quit Game menu entry is selected.
/// </summary>
void QuitGameMenuEntrySelected(object sender, EventArgs e)
{
MessageBoxScreen confirmQuitMessageBox =
new MessageBoxScreen(Resources.ConfirmQuitGame);
confirmQuitMessageBox.Accepted += ConfirmQuitMessageBoxAccepted;
ScreenManager.AddScreen(confirmQuitMessageBox);
}
/// <summary>
/// When the user cancels the main menu, ask if they want to exit the sample.
/// </summary>
protected override void OnCancel()
{
MessageBoxScreen confirmExitMessageBox =
new MessageBoxScreen(Resources.ConfirmExitSample);
confirmExitMessageBox.Accepted += ConfirmExitMessageBoxAccepted;
ScreenManager.AddScreen(confirmExitMessageBox);
}
/// <summary>
/// Handle MenuSelect inputs by marking ourselves as ready.
/// </summary>
void HandleMenuSelect(LocalNetworkGamer gamer)
{
if (!gamer.IsReady)
{
gamer.IsReady = true;
}
else if (gamer.IsHost)
{
// The host has an option to force starting the game, even if not
// everyone has marked themselves ready. If they press select twice
// in a row, the first time marks the host ready, then the second
// time we ask if they want to force start.
MessageBoxScreen messageBox = new MessageBoxScreen(
Resources.ConfirmForceStartGame);
messageBox.Accepted += ConfirmStartGameMessageBoxAccepted;
ScreenManager.AddScreen(messageBox);
}
}
/// <summary>
/// Internal method for leaving the network session. This disposes the
/// session, removes the NetworkSessionComponent, and returns the user
/// to the main menu screen.
/// </summary>
void LeaveSession()
{
// 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(),
new MainMenuScreen(),
messageBox);
}