/// <summary>
/// The constructor is private: loading screens should
/// be activated via the static Load method instead.
/// </summary>
private LoadingScreen(ScreenManager screenManager, bool loadingIsSlow,
GameScreen[] screensToLoad)
{
this.loadingIsSlow = loadingIsSlow;
this.screensToLoad = screensToLoad;
TransitionOnTime = TimeSpan.FromSeconds(0.5);
}
/// <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 void RemoveScreen(GameScreen screen)
{
// If we have a graphics device, tell the screen to unload content.
if (isInitialized)
{
screen.UnloadContent();
}
screens.Remove(screen);
screensToUpdate.Remove(screen);
// if there is a screen still in the manager, update TouchPanel
// to respond to gestures that screen is interested in.
if (screens.Count > 0)
{
TouchPanel.EnabledGestures = screens[screens.Count - 1].EnabledGestures;
}
}
/// <summary>
/// Adds a new screen to the screen manager.
/// </summary>
public void AddScreen(GameScreen screen, PlayerIndex? controllingPlayer)
{
screen.ControllingPlayer = controllingPlayer;
screen.ScreenManager = this;
screen.IsExiting = false;
// If we have a graphics device, tell the screen to load content.
if (isInitialized)
{
screen.LoadContent();
}
screens.Add(screen);
// update the TouchPanel to respond to gestures this screen is interested in
TouchPanel.EnabledGestures = screen.EnabledGestures;
}
/// <summary>
/// Draws the button
/// </summary>
/// <param name="screen">The screen drawing the button</param>
public void Draw(GameScreen screen)
{
// Grab some common items from the ScreenManager
SpriteBatch spriteBatch = screen.ScreenManager.SpriteBatch;
SpriteFont font = screen.ScreenManager.Font;
Texture2D blank = screen.ScreenManager.BlankTexture;
// Compute the button's rectangle
Rectangle r = new Rectangle(
(int)Position.X,
(int)Position.Y,
(int)Size.X,
(int)Size.Y);
// Fill the button
spriteBatch.Draw(blank, r, FillColor * Alpha);
// Draw the border
spriteBatch.Draw(
blank,
new Rectangle(r.Left, r.Top, r.Width, BorderThickness),
BorderColor * Alpha);
spriteBatch.Draw(
blank,
new Rectangle(r.Left, r.Top, BorderThickness, r.Height),
BorderColor * Alpha);
spriteBatch.Draw(
blank,
new Rectangle(r.Right - BorderThickness, r.Top, BorderThickness, r.Height),
BorderColor * Alpha);
spriteBatch.Draw(
blank,
new Rectangle(r.Left, r.Bottom - BorderThickness, r.Width, BorderThickness),
BorderColor * Alpha);
// Draw the text centered in the button
Vector2 textSize = font.MeasureString(Text);
Vector2 textPosition = new Vector2(r.Center.X, r.Center.Y) - textSize / 2f;
textPosition.X = (int)textPosition.X;
textPosition.Y = (int)textPosition.Y;
spriteBatch.DrawString(font, Text, textPosition, TextColor * Alpha);
}