/// <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 buttonColor = isSelected ? Color.OrangeRed : Color.WhiteSmoke;
Color textColor = isSelected ? Color.Blue : Color.White;
// Pulsate the size of the selected menu entry.
double time = gameTime.TotalGameTime.TotalSeconds;
float pulsate = (float)Math.Cos(time * 6) + 1;
float scale = 1 + pulsate * 0.02f * selectionFade;
// Modify the alpha to fade text out during transitions.
textColor = new Color(textColor.R, textColor.G, textColor.B, screen.TransitionAlpha);
buttonColor = new Color(buttonColor.R, buttonColor.G, buttonColor.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);
switch (text)
{
case "New Game":
spriteBatch.Draw(MainMenuScreen.textNG, position, null, buttonColor, 0, origin, scale, SpriteEffects.None, 0);
break;
case "Load Game":
spriteBatch.Draw(MainMenuScreen.textLG, position, null, buttonColor, 0, origin, scale, SpriteEffects.None, 0);
break;
case "Options":
spriteBatch.Draw(MainMenuScreen.textOp, position, null, buttonColor, 0, origin, scale, SpriteEffects.None, 0);;
break;
case "Credits":
spriteBatch.Draw(MainMenuScreen.textCr, position, null, buttonColor, 0, origin, scale, SpriteEffects.None, 0);
break;
case "Exit":
spriteBatch.Draw(MainMenuScreen.textEx, position, null, buttonColor, 0, origin, scale, SpriteEffects.None, 0);
break;
default:
break;
}
}
/// <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;
}
