public void StartAsyncLoad(string screenType, Action afterLoaded = null)
{
if (AsyncLoadingState == AsyncLoadingState.LoadingScreen)
{
#if DEBUG
throw new InvalidOperationException("This Screen is already loading a Screen of type " + asyncScreenTypeToLoad + ". This is a DEBUG-only exception");
#endif
}
else if (AsyncLoadingState == AsyncLoadingState.Done)
{
#if DEBUG
throw new InvalidOperationException("This Screen has already loaded a Screen of type " + asyncScreenTypeToLoad + ". This is a DEBUG-only exception");
#endif
}
else
{
AsyncLoadingState = AsyncLoadingState.LoadingScreen;
asyncScreenTypeToLoad = ScreenManager.MainAssembly.GetType(screenType);
if (asyncScreenTypeToLoad == null)
{
throw new Exception("Could not find the type " + screenType);
}
#if REQUIRES_PRIMARY_THREAD_LOADING
// We're going to do the "async" loading on the primary thread
// since we can't actually do it async.
PerformAsyncLoad();
if (afterLoaded != null)
{
afterLoaded();
}
#else
mNumberOfThreadsBeforeAsync = FlatRedBallServices.GetNumberOfThreadsToUse();
FlatRedBallServices.SetNumberOfThreadsToUse(1);
Action action;
if (afterLoaded == null)
{
action = (Action)PerformAsyncLoad;
}
else
{
action = () =>
{
PerformAsyncLoad();
// We're going to add this to the instruction manager so it executes on the main thread:
InstructionManager.AddSafe(new DelegateInstruction(afterLoaded));
};
}
#if WINDOWS_8 || UWP
System.Threading.Tasks.Task.Run(action);
#else
ThreadStart threadStart = new ThreadStart(action);
Thread thread = new Thread(threadStart);
thread.Start();
#endif
#endif
}
}