/// <summary>
/// Allows each screen to run logic.
/// </summary>
/// <param name="gameTime"></param>
public override void Update(GameTime gameTime)
{
// Copy the master screen list to avoid confusion if the process of updating one screen adds or removes others
screensToUpdate.Clear();
foreach (GameScreen screen in screens)
{
screensToUpdate.Add(screen);
}
bool otherScreenHasFocus = !Game.IsActive;
bool coveredByOtherScreen = false;
while (screensToUpdate.Count > 0)
{
// Pop the topmost screen off the waiting list
GameScreen screen = screensToUpdate[screensToUpdate.Count - 1];
screensToUpdate.RemoveAt(screensToUpdate.Count - 1);
// Update the screen
screen.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen);
if (screen.ScreenState == ScreenState.TransitionOn ||
screen.ScreenState == ScreenState.Active)
{
// If this screen is active or becoming active and has the focus, let it handle input
if (!otherScreenHasFocus)
{
screen.HandleInput();
// Since this screen now has the focus, other screens updated subsequently in this loop do not.
otherScreenHasFocus = true;
}
// If this is not a pop-up, inform any subsequent screens that they are covered by it
if (!screen.IsPopup)
{
coveredByOtherScreen = true;
}
}
}
}
