/// <summary>
/// Add as screen to the screen list
/// </summary>
/// <param name="screen">Screen to add</param>
/// <returns>If operation was successful</returns>
public bool AddScreen(Screen screen)
{
if (screen == null)
return false;
screen.ScreenManager = this;
screen.LoadContent();
screens.Add(screen);
return true;
}
/// <summary>
/// Remove an existing screen
/// </summary>
/// <param name="screen">Screen object to remove</param>
/// <returns>If operation was successful</returns>
public bool RemoveScreen(Screen screen)
{
if (screen != null && screens.Count > 1)
{
screen.UnloadContent();
screens.Remove(screen);
screens[screens.Count - 1].Reload();
screens[screens.Count - 1].SetStatus(ScreenStatus.Visible);
return true;
}
return false;
}
/// <summary>
/// Show a screen
/// </summary>
/// <param name="screen">Screen to show</param>
/// <returns>If operation was successful</returns>
public bool ShowScreen(Screen screen)
{
//Find if screen exists. If not, add it
if (!screens.Contains(screen))
AddScreen(screen);
//Find out where the screen exists in the array
int foundAtIndex = -1;
for (int i = 0; i < screens.Count; i++)
{
if (screens[i] == screen)
{
screens[i].Reload();
foundAtIndex = i;
break;
}
}
//if screen isn't found, error out
if (foundAtIndex == -1)
return false;
//disable all non-relevant screens
for (int i = 0; i < foundAtIndex; i++)
{
if (screens[foundAtIndex].Status == ScreenStatus.Overlay && i == foundAtIndex - 1)
//overlay screens can have 1 screen visible underneath them
screens[i].SetStatus(ScreenStatus.Visible);
else
screens[i].SetStatus(ScreenStatus.Disabled);
}
if (screens[foundAtIndex].Status != ScreenStatus.Overlay)
screens[foundAtIndex].SetStatus(ScreenStatus.Visible);
return true;
}