/// <summary>
/// Unload your graphics content.
/// </summary>
protected override void UnloadContent()
{
ScreenStack.UnloadContent();
DrawHelper?.Dispose();
DrawHelper = null;
}
/// <summary>
/// Load your graphics content.
/// </summary>
protected override void LoadContent()
{
SpriteBatch = new SpriteBatch(GraphicsDevice);
DrawHelper = new DrawHelper(GraphicsDevice, SpriteBatch);
ScreenStack.LoadContent();
}
public void RemoveScreens <T>() where T : IScreen
{
var screens = ScreenStack.FindScreens <T>().ToList();
foreach (var screen in screens)
{
RemoveScreen(screen);
}
}
/// <summary>
/// Tells each screen to draw itself.
/// </summary>
public override void Draw(GameTime gameTime)
{
try
{
ScreenStack.Draw(gameTime);
}
catch (Exception ex)
{
ErrorScreen(ex);
}
}
/// <summary>
/// Removes a screen from the screen manager. You should normally
/// use GameScreen.ExitScreen instead of calling this directly, so
/// the screen can gradually transition off rather than just being
/// instantly removed.
/// </summary>
public virtual void RemoveScreen(IScreen screen)
{
// If we have a graphics device, tell the screen to unload content.
if (Initialized)
{
screen.UnloadContent();
}
ScreenStack.RemoveScreen(screen);
//reset the times of all the rest of teh screens
var widgetScreens = ScreenStack.Screens.OfType <WidgetScreen>();
foreach (var curScreen in widgetScreens)
{
curScreen.ResetInputTimer();
}
}
/// <summary>
/// Constructs a new screen manager component.
/// </summary>
public ScreenManager(Game game, ScreenStackDelegate mainMenuStack)
: base(game)
{
Initialized = false;
MainMenuStack = mainMenuStack;
ScreenStack = new ScreenStack();
ClearColor = new Color(0.0f, 0.1f, 0.2f);
//get the touch service
Input = game.Services.GetService <IInputHandler>();
if (null == Input)
{
throw new Exception("Cannot initialize ScreenManager without first adding IInputHandler service");
}
game.Components.Add(this);
game.Services.AddService(typeof(IScreenManager), this);
//When using render targets, don't clear the screen!!!
GraphicsDevice.PresentationParameters.RenderTargetUsage = RenderTargetUsage.PreserveContents;
}
public List <T> FindScreens <T>() where T : IScreen
{
return(ScreenStack.FindScreens <T>().ToList());
}
public override void Update(GameTime gameTime)
{
ScreenStack.Update(gameTime, Input, !Game.IsActive);
}