/// <summary>
/// Draws the menu entry. This can be overridden to customize the appearance.
/// </summary>
public virtual void Draw( MenuScreen screen, Vector2 position,
bool isSelected, GameTime gameTime)
{
// Draw the selected entry in yellow, otherwise white.
Color color = isSelected ? Color.Yellow : Color.White;
// Pulsate the size of the selected menu entry.
double time = gameTime.TotalGameTime.TotalSeconds;
float pulsate = (float)Math.Sin( time * 6 ) + 1;
float scale = 1 + pulsate * 0.05f * selectionFade;
// Modify the alpha to fade text out during transitions.
color = new Color( color.R, color.G, color.B, screen.TransitionAlpha );
// Draw text, centered on the middle of each line.
ScreenManager screenManager = screen.ScreenManager;
SpriteBatch spriteBatch = screenManager.SpriteBatch;
SpriteFont font = screenManager.Font;
Vector2 origin = new Vector2( 0, font.LineSpacing / 2 );
spriteBatch.DrawString( font, text, position, color, 0,
origin, scale, SpriteEffects.None, 0 );
}
/// <summary>
/// Updates the menu entry.
/// </summary>
public virtual void Update( MenuScreen screen, bool isSelected,
GameTime gameTime)
{
// When the menu selection changes, entries gradually fade between
// their selected and deselected appearance, rather than instantly
// popping to the new state.
float fadeSpeed = (float)gameTime.ElapsedGameTime.TotalSeconds * 4;
if ( isSelected )
selectionFade = Math.Min( selectionFade + fadeSpeed, 1 );
else
selectionFade = Math.Max( selectionFade - fadeSpeed, 0 );
}
/// <summary>
/// Queries how much space this menu entry requires.
/// </summary>
public virtual int GetHeight( MenuScreen screen )
{
return screen.ScreenManager.Font.LineSpacing;
}