/// <summary>
/// Handle the end of the session.
/// </summary>
void networkSession_SessionEnded(object sender, NetworkSessionEndedEventArgs e)
{
if ((world != null) && !world.GameExited)
{
world.GameExited = true;
world = null;
}
if (!IsExiting)
{
ExitScreen();
}
networkSession = null;
}
/// <summary>
/// Event handler for when the user selects "yes" on the "are you sure
/// you want to exit" message box.
/// </summary>
private void ExitMessageBoxAccepted(object sender, EventArgs e)
{
world.GameExited = true;
world = null;
}
/// <summary>
/// Handle the end of the game session.
/// </summary>
void networkSession_GameEnded(object sender, GameEndedEventArgs e)
{
if ((world != null) && !world.GameWon && !world.GameExited)
{
world.GameExited = true;
}
if (!IsExiting && ((world == null) || world.GameExited))
{
world = null;
ExitScreen();
networkSession = null;
}
}
/// <summary>
/// Construct a new GameplayScreen object.
/// </summary>
/// <param name="networkSession">The network session for this game.</param>
/// <param name="world">The primary gameplay object.</param>
public GameplayScreen(NetworkSession networkSession, World world)
{
// safety-check the parameters
if (networkSession == null)
{
throw new ArgumentNullException("networkSession");
}
if (world == null)
{
throw new ArgumentNullException("world");
}
// apply the parameters
this.networkSession = networkSession;
this.world = world;
// set up the network events
sessionEndedHandler = new EventHandler<NetworkSessionEndedEventArgs>(
networkSession_SessionEnded);
networkSession.SessionEnded += sessionEndedHandler;
gameEndedHandler = new EventHandler<GameEndedEventArgs>(
networkSession_GameEnded);
networkSession.GameEnded += gameEndedHandler;
gamerLeftHandler = new EventHandler<GamerLeftEventArgs>(
networkSession_GamerLeft);
networkSession.GamerLeft += gamerLeftHandler;
// cache the local player's ship object
if (networkSession.LocalGamers.Count > 0)
{
PlayerData playerData = networkSession.LocalGamers[0].Tag as PlayerData;
if (playerData != null)
{
localShip = playerData.Ship;
}
}
// set the transition times
TransitionOnTime = TimeSpan.FromSeconds(1.0);
TransitionOffTime = TimeSpan.FromSeconds(1.0);
}
/// <summary>
/// Lets the game respond to player input. Unlike the Update method,
/// this will only be called when the gameplay screen is active.
/// </summary>
public override void HandleInput(InputState input)
{
if (input == null)
throw new ArgumentNullException("input");
if (!IsExiting)
{
if ((world != null) && !world.GameExited)
{
if (input.PauseGame && !world.GameWon)
{
// If they pressed pause, bring up the pause menu screen.
const string message = "Exit the game?";
MessageBoxScreen messageBox = new MessageBoxScreen(message,
false);
messageBox.Accepted += ExitMessageBoxAccepted;
ScreenManager.AddScreen(messageBox);
}
if (input.MenuSelect && world.GameWon)
{
world.GameExited = true;
world = null;
if (!IsExiting)
{
ExitScreen();
}
networkSession = null;
}
}
}
}
/// <summary>
/// Disposes this object.
/// </summary>
/// <param name="disposing">
/// True if this method was called as part of the Dispose method.
/// </param>
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
lock (this)
{
if (world != null)
{
world.Dispose();
world = null;
}
if (packetWriter != null)
{
packetWriter.Close();
packetWriter = null;
}
}
}
}
/// <summary>
/// Handle the end of the network session.
/// </summary>
void networkSession_SessionEnded(object sender, NetworkSessionEndedEventArgs e)
{
if (!IsExiting)
{
ExitScreen();
}
if (world != null)
{
world.Dispose();
world = null;
}
if (networkSession != null)
{
networkSession.Dispose();
networkSession = null;
}
}
/// <summary>
/// When the user cancels the main menu, ask if they want to exit the sample.
/// </summary>
protected override void OnCancel()
{
if (!IsExiting)
{
ExitScreen();
}
if (world != null)
{
world.Dispose();
world = null;
}
if (networkSession != null)
{
networkSession.Dispose();
networkSession = null;
}
}
/// <summary>
/// Updates the lobby. This method checks the GameScreen.IsActive
/// property, so the game will stop updating when the pause menu is active,
/// or if you tab away to a different application.
/// </summary>
public override void Update(Microsoft.Xna.Framework.GameTime gameTime,
bool otherScreenHasFocus, bool coveredByOtherScreen)
{
if (networkSession != null)
{
// update the network session
try
{
networkSession.Update();
}
catch (NetworkException ne)
{
System.Console.WriteLine(
"Network failed to update: " + ne.ToString());
if (networkSession != null)
{
networkSession.Dispose();
networkSession = null;
}
}
}
// update the world
if ((world != null) && !otherScreenHasFocus && !coveredByOtherScreen)
{
if (world.GameWon)
{
// unload the existing world
world.Dispose();
world = null;
// make sure that all of the ships have cleaned up
foreach (NetworkGamer networkGamer in networkSession.AllGamers)
{
PlayerData playerData = networkGamer.Tag as PlayerData;
if ((playerData != null) && (playerData.Ship != null))
{
playerData.Ship.Die(null, true);
}
}
// make sure the collision manager is up-to-date
CollisionManager.Collection.ApplyPendingRemovals();
// create a new world
world = new World(ScreenManager.GraphicsDevice,
ScreenManager.Content, networkSession);
}
else if (world.GameExited)
{
if (!IsExiting)
{
ExitScreen();
}
if (world != null)
{
world.Dispose();
world = null;
}
if (networkSession != null)
{
networkSession.Dispose();
networkSession = null;
}
base.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen);
return;
}
else
{
world.Update((float)gameTime.ElapsedGameTime.TotalSeconds, true);
}
}
// update the menu entry text
if (otherScreenHasFocus == false)
{
if ((networkSession.LocalGamers.Count > 0) &&
(networkSession.SessionState == NetworkSessionState.Lobby))
{
if (!networkSession.LocalGamers[0].IsReady)
{
MenuEntries[0] = "Press X to Mark as Ready";
}
else if (!networkSession.IsEveryoneReady)
{
MenuEntries[0] = "Waiting for all players to mark as ready...";
}
else if (!networkSession.IsHost)
{
MenuEntries[0] = "Waiting for the host to start game...";
}
else
{
MenuEntries[0] = "Starting the game...";
networkSession.StartGame();
}
}
else if (networkSession.SessionState == NetworkSessionState.Playing)
{
MenuEntries[0] = "Game starting...";
}
// if the game is playing and the world is initialized, then start up
if ((networkSession.SessionState == NetworkSessionState.Playing) &&
(world != null) && world.Initialized)
{
GameplayScreen gameplayScreen =
new GameplayScreen(networkSession, world);
gameplayScreen.ScreenManager = this.ScreenManager;
ScreenManager.AddScreen(gameplayScreen);
}
}
base.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen);
}
/// <summary>
/// Load graphics content for the game.
/// </summary>
public override void LoadContent()
{
base.LoadContent();
// create the world object
world = new World(ScreenManager.GraphicsDevice, ScreenManager.Content,
networkSession);
// set the networking events
networkSession.GamerJoined += gamerJoinedHandler;
networkSession.GameStarted += gameStartedHandler;
networkSession.SessionEnded += sessionEndedHandler;
}
