/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
{
Exit();
}
MouseState currentMouseState = Mouse.GetState();
if (lastMouseState.LeftButton == ButtonState.Released &&
currentMouseState.LeftButton == ButtonState.Pressed &&
currentMouseState.X >= 0 &&
graphics.PreferredBackBufferWidth > currentMouseState.X &&
currentMouseState.Y >= 0 &&
graphics.PreferredBackBufferHeight > currentMouseState.Y)
{
screen.Click(currentMouseState.X, currentMouseState.Y);
}
GameStatus currentGameStatus = screen.Update();
if (lastGameStatus != currentGameStatus)
{
switch (currentGameStatus)
{
case GameStatus.StartScreen:
screen = new StartScreen(spriteBatch, font);
break;
case GameStatus.GameScreen:
screen = new GameScreen(spriteBatch, font);
break;
case GameStatus.GameOverScreen:
screen = new GameOverScreen(spriteBatch, font);
break;
}
}
lastGameStatus = currentGameStatus;
lastMouseState = currentMouseState;
base.Update(gameTime);
}