/// <summary>
/// Adds a new screen to the screen manager.
/// </summary>
public void AddScreen(GameScreen screen, PlayerIndex?controllingPlayer)
{
screen.ControllingPlayer = controllingPlayer;
screen.ScreenManager = this;
screen.IsExiting = false;
// If we have a graphics device, tell the screen to load content.
if (isInitialized)
{
screen.Activate(false);
}
screens.Add(screen);
// update the TouchPanel to respond to gestures this screen is interested in
TouchPanel.EnabledGestures = screen.EnabledGestures;
}
public bool Activate(bool instancePreserved)
{
#if !WINDOWS_PHONE
return(false);
#else
// If the game instance was preserved, the game wasn't dehydrated so our screens still exist.
// We just need to activate them and we're ready to go.
if (instancePreserved)
{
// Make a copy of the master screen list, to avoid confusion if
// the process of activating one screen adds or removes others.
tempScreensList.Clear();
foreach (GameScreen screen in screens)
{
tempScreensList.Add(screen);
}
foreach (GameScreen screen in tempScreensList)
{
screen.Activate(true);
}
}
// Otherwise we need to refer to our saved file and reconstruct the screens that were present
// when the game was deactivated.
else
{
// Try to get the screen factory from the services, which is required to recreate the screens
IScreenFactory screenFactory = Game.Services.GetService(typeof(IScreenFactory)) as IScreenFactory;
if (screenFactory == null)
{
throw new InvalidOperationException(
"Game.Services must contain an IScreenFactory in order to activate the ScreenManager.");
}
// Open up isolated storage
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
{
// Check for the file; if it doesn't exist we can't restore state
if (!storage.FileExists(StateFilename))
{
return(false);
}
// Read the state file so we can build up our screens
using (IsolatedStorageFileStream stream = storage.OpenFile(StateFilename, FileMode.Open))
{
XDocument doc = XDocument.Load(stream);
// Iterate the document to recreate the screen stack
foreach (XElement screenElem in doc.Root.Elements("GameScreen"))
{
// Use the factory to create the screen
Type screenType = Type.GetType(screenElem.Attribute("Type").Value);
GameScreen screen = screenFactory.CreateScreen(screenType);
// Rehydrate the controlling player for the screen
PlayerIndex?controllingPlayer = screenElem.Attribute("ControllingPlayer").Value != ""
? (PlayerIndex)Enum.Parse(typeof(PlayerIndex), screenElem.Attribute("ControllingPlayer").Value, true)
: (PlayerIndex?)null;
screen.ControllingPlayer = controllingPlayer;
// Add the screen to the screens list and activate the screen
screen.ScreenManager = this;
screens.Add(screen);
screen.Activate(false);
// update the TouchPanel to respond to gestures this screen is interested in
TouchPanel.EnabledGestures = screen.EnabledGestures;
}
}
}
}
return(true);
#endif
}
/// <summary>
/// Adds a new screen to the screen manager.
/// </summary>
public void AddScreen(GameScreen screen, PlayerIndex? controllingPlayer)
{
screen.ControllingPlayer = controllingPlayer;
screen.ScreenManager = this;
screen.IsExiting = false;
// If we have a graphics device, tell the screen to load content.
if (isInitialized)
{
screen.Activate(false);
}
screens.Add(screen);
// update the TouchPanel to respond to gestures this screen is interested in
TouchPanel.EnabledGestures = screen.EnabledGestures;
}
