/// <summary>
/// Draws game states
/// </summary>
public void Draw()
{
// No screen to draw
if (Screens.Count == 0)
{
return;
}
Stack <GameScreenBase> screensToUpdate = new Stack <GameScreenBase>();
foreach (GameScreenBase scr in Screens)
{
screensToUpdate.Push(scr);
}
GameScreenBase screen = screensToUpdate.Pop();
screen.Draw();
return;
/*
* foreach (GameScreen screen in Screens)
* {
* if (screen.State == ScreenState.Hidden)
* continue;
*
* screen.Draw();
* }
*/
}
/// <summary>
/// Removes the a screen
/// </summary>
/// <param name="screen">Screen to remove</param>
public void RemoveScreen(GameScreenBase screen)
{
if (screen == null)
{
return;
}
screen.OnLeave();
screen.UnloadContent();
Screens.Remove(screen);
if (Screens.Count > 0)
{
Screens[Screens.Count - 1].OnEnter();
}
}
/// <summary>
/// Update game states
/// </summary>
/// <param name="time">Elapsed game time</param>
public void Update_OLD(GameTime time)
{
// Make a copy of the master screen list, to avoid confusion if
// the process of updating one screen adds or removes others.
List <GameScreenBase> screensToUpdate = new List <GameScreenBase>();
foreach (GameScreenBase screen in Screens)
{
screensToUpdate.Add(screen);
}
bool hasFocus = true;
bool isCovered = false;
// Update each screens
while (screensToUpdate.Count > 0)
{
// Pop the topmost screen off the waiting list.
GameScreenBase screen = screensToUpdate[screensToUpdate.Count - 1];
screensToUpdate.RemoveAt(screensToUpdate.Count - 1);
// Update screen logic
screen.Update(time, hasFocus, isCovered);
if (screen.ScreenState == ScreenState.Entering || screen.ScreenState == ScreenState.Active)
{
// If this is the first active screen we came across,
// give it a chance to handle input.
if (hasFocus)
{
screen.HandleInput();
hasFocus = false;
}
// If this is an active non-popup, inform any subsequent
// screens that they are covered by it.
if (!screen.IsPopupScreen)
{
isCovered = true;
}
}
}
}
/// <summary>
/// Pushes a GameScreen over the current game state
/// </summary>
/// <param name="screen">Screen handle</param>
public void AddScreen(GameScreenBase screen)
{
if (screen == null)
{
return;
}
if (Screens.Count > 0)
{
GameScreenBase current = Screens[Screens.Count - 1];
current.OnLeave();
}
Screens.Add(screen);
screen.ScreenManager = this;
screen.IsExiting = false;
screen.LoadContent();
screen.OnEnter();
}
/// <summary>
/// Update game states
/// </summary>
/// <param name="time">Elapsed game time</param>
public void Update(GameTime time)
{
// No screen to update
if (Screens.Count == 0)
{
return;
}
// Make a copy of the master screen list, to avoid confusion if
// the process of updating one screen adds or removes others.
Stack <GameScreenBase> screensToUpdate = new Stack <GameScreenBase>();
foreach (GameScreenBase scr in Screens)
{
screensToUpdate.Push(scr);
}
GameScreenBase screen = screensToUpdate.Pop();
screen.Update(time, true, false);
}
