GameStateManagement.GameScreen.HandleInput C# (CSharp) Method

        public virtual void HandleInput(InputState input)
        {
        }

        /// <summary>
        /// Allows each screen to run logic.
        /// </summary>
        public void Update(GameTime gameTime)
        {
            // Read the keyboard and gamepad.
            Input.Update();

            ScaledMousePos = new Point(Input.CurrentMouseState.X / Game.DisplayScale, Input.CurrentMouseState.Y / Game.DisplayScale);

            // Make a copy of 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;

            // 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;
                    }
                }
            }

            // Print debug trace?
            if (traceEnabled)
            {
                TraceScreens();
            }
        }