SplashScreen and MAUI window flickering

[bdovaz]

@dotMorten I'm trying to make it work but I can't get it to work 100%.

I am following this tutorial but it is not for MAUI so I have to translate the MAUI equivalent: https://dotmorten.github.io/WinUIEx/concepts/Splashscreen.html

In these 2 classes you see the MAUI message flow:

https://github.com/dotnet/maui/blob/8.0.90/src/Core/src/Platform/Windows/MauiWinUIApplication.cs

https://github.com/dotnet/maui/blob/8.0.90/src/Core/src/Platform/Windows/ApplicationExtensions.cs

With the following code I get it to work well except that I have the problem that during a microsecond the main window is seen by the fact that after launching "OnWindowCreated" it does a "window.Activate()" as seen in the link above. Is there any way to prevent this problem?

Thanks!

builder.ConfigureLifecycleEvents(
    events => events.AddWindows(windowsLifecycleBuilder =>
    {
        windowsLifecycleBuilder.OnWindowCreated(window =>
        {
            static void OnActivated(object sender, WindowActivatedEventArgs _)
            {
                Window window = (sender as Window)!;

                window.Activated -= OnActivated;
                window.Hide();
            }

            window.Activated += OnActivated;
        });
        windowsLifecycleBuilder.OnLaunched((_, _) =>
            {
                Window? window = Controls.Application.Current?.Windows[0].Handler?
                    .PlatformView as MauiWinUIWindow;

                SplashScreen splashScreen = new(window!);
            });
    }));