public void Update(GameTime gameTime)
{
float elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;
if (state == FadeState.In)
{
fadeAlpha = MathHelper.Clamp(fadeAlpha - (elapsed * fadeSpeed), 0, 1);
fadeImage.Alpha = fadeAlpha;
fadeImage.Color = Color.White * fadeImage.Alpha;
if (fadeAlpha <= 0)
{
state = FadeState.Idle;
}
}
else if (state == FadeState.Out)
{
fadeAlpha = MathHelper.Clamp(fadeAlpha + (elapsed * fadeSpeed), 0, 1);
fadeImage.Alpha = fadeAlpha;
fadeImage.Color = Color.White * fadeImage.Alpha;
if (fadeAlpha >= 1) //Done fading to black, now set new screen and fade into it
{
//Destory objects from the first screen
if (Current != null)
{
Current.Remove();
}
Current = fadeTo;
Current.Add(this);
state = FadeState.In;
fadeImage.BringToFront();
}
}
}
/// <summary>
/// Transitions from the current screen to the next
/// </summary>
public void SwitchScreen(IScreen newScreen)
{
//Do not fade if setting the login screen (first screen)
if ((newScreen is LoginScreen) && Current == null)
{
//Destory objects from the first screen
if (Current != null)
{
Current.Remove();
}
Current = newScreen;
Current.Add(this);
}
else
{
//Set the current screen and add it's objects
fadeTo = newScreen;
state = FadeState.Out;
}
fadeImage.BringToFront();
}
/// <summary>
/// Transitions from the current screen to the next
/// </summary>
public void SwitchScreen(IScreen newScreen)
{
//Do not fade if setting the login screen (first screen)
if ((newScreen is LoginScreen) && Current == null)
{
//Destory objects from the first screen
if (Current != null)
{
Current.Remove();
}
Current = newScreen;
Current.Add(this);
}
else
{
//Set the current screen and add it's objects
fadeTo = newScreen;
state = FadeState.Out;
}
fadeImage.BringToFront();
}