예제 #1
0
 /// <summary>
 /// Tells the screen to go away. Unlike ScreenManager.RemoveScreen, which
 /// instantly kills the screen, this method respects the transition timings
 /// and will give the screen a chance to gradually transition off.
 /// </summary>
 public void ExitScreen()
 {
     if (TransitionOffTime == TimeSpan.Zero)
     {
         // If the screen has a zero transition time, remove it immediately.
         ScreenManager.RemoveScreen(this);
     }
     else
     {
         // Otherwise flag that it should transition off and then exit.
         isExiting = true;
     }
 }
예제 #2
0
        /// <summary>
        /// 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.
        /// </summary>
        public virtual void Update(GameTime gameTime, bool otherScreenHasFocus,
                                   bool coveredByOtherScreen)
        {
            this.otherScreenHasFocus = otherScreenHasFocus;

            if (isExiting)
            {
                // If the screen is going away to die, it should transition off.
                screenState = ScreenState.TransitionOff;

                if (!UpdateTransition(gameTime, transitionOffTime, 1))
                {
                    // When the transition finishes, remove the screen.
                    ScreenManager.RemoveScreen(this);
                }
            }
            else if (coveredByOtherScreen)
            {
                // If the screen is covered by another, it should transition off.
                if (UpdateTransition(gameTime, transitionOffTime, 1))
                {
                    // Still busy transitioning.
                    screenState = ScreenState.TransitionOff;
                }
                else
                {
                    // Transition finished!
                    screenState = ScreenState.Hidden;
                }
            }
            else
            {
                // Otherwise the screen should transition on and become active.
                if (UpdateTransition(gameTime, transitionOnTime, -1))
                {
                    // Still busy transitioning.
                    screenState = ScreenState.TransitionOn;
                }
                else
                {
                    // Transition finished!
                    screenState = ScreenState.Active;
                }
            }
        }