Update() public method

Allows the screen to run logic, such as updating the transition position. Unlike HandleInput, this method is called regardless of whether the screen is active, hidden, or in the middle of a transition.
public Update ( GameTime gameTime, bool otherScreenHasFocus, bool coveredByOtherScreen ) : void
gameTime Microsoft.Xna.Framework.GameTime
otherScreenHasFocus bool
coveredByOtherScreen bool
return void
GameScreen Class Documentation
Esempio n. 1
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        /// <summary>
        /// Allows each screen to run logic.
        /// </summary>
        public override void Update(GameTime gameTime)
        {
            // Make a copy of the master screen list, to avoid confusion if
            // the process of updating one screen adds or removes others.
            _screensToUpdate.Clear();

            for (int i = 0; i < _screens.Count; i++)
            {
                _screensToUpdate.Add(_screens[i]);
            }

            bool otherScreenHasFocus  = !Game.IsActive;
            bool coveredByOtherScreen = false;

            // Loop as long as there are _screens waiting to be updated.
            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 is the first active screen we came across,
                    // give it a chance to handle _input.
                    if (!otherScreenHasFocus)
                    {
                        screen.HandleInput(_input);

                        otherScreenHasFocus = true;
                    }

                    // If this is an active non-popup, inform any subsequent
                    // _screens that they are covered by it.
                    if (!screen.IsPopup)
                    {
                        coveredByOtherScreen = true;
                    }
                }
            }

            //Process Input
            _input.Update(gameTime);
        }