[regression/8.0.0] [Windows]Shell flyout menu missing 😨 when full screen

[BaY1251]

Description

I cannot hide the title bar under any circumstances, it was possible before MAUI8.0. There are no elements except for the Shell flyout menu

I tried appWindow.SetPresenter(AppWindowPresenterKind.FullScreen);

AND #17041

presenter.SetBorderAndTitleBar(false, false);
presenter.Maximize();;

AND #15142

presenter.IsMaximizable = false;
presenter.IsResizable = false;
presenter.IsMinimizable = false;
presenter.SetBorderAndTitleBar(true, false);

ALL CAN NOT completely hide the TitleBar

Steps to Reproduce

Download https://github.com/BaY1251/MauiDebug.git Open /ANR/ANR.sln to compile and generate a project Run

Link to public reproduction project repository

https://github.com/BaY1251/MauiDebug.git

Version with bug

8.0.0-rc.2.9530

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

Windows10-22H2 net8.0-windows10.0.19041.0

Did you find any workaround?

No response

Relevant log output

No response

[Foda]

Hello! After testing locally a bit I've got a work-around for you. You'll just need to make sure the window is loaded first before setting it to be fullscreen. It seems to be caused by the NavigationView style in WinUI setting the top-margin to 32 when the titlebar is hidden (???)

In your example, add the following to CreateMauiApp in MauiProgram.cs before builder.Build():

#if WINDOWS
        builder.ConfigureLifecycleEvents(events =>
        {
            events.AddWindows(windows =>
                windows.OnWindowCreated(window =>
                {
                    var presenter = window?.AppWindow.Presenter;
                    switch (presenter)
                    {
                        case Microsoft.UI.Windowing.OverlappedPresenter overlappedPresenter:
                            overlappedPresenter.SetBorderAndTitleBar(false, false);
                            overlappedPresenter.Maximize();
                            break;
                    }
                }));
        });
#endif

Then, just remove the Microsoft.Maui.Handlers.WindowHandler.Mapper.AppendToMapping code in Windows/App.xaml.cs.

[BaY1251]

@Foda TitleBar is indeed hidden, but the Shell flyout menu is also missing 😨. Then how to Open flyout?

[BaY1251]

Shell.flyout.menu can show in Shell.TitleView? style may like Android

[RoiChen001]

I can't repro this issue on the latest 17.10 Preview1.

[BaY1251]

Have you confirmed "Shell flyout menu missing, when full screen"?
Unable to open the flyout when full screen

[BaY1251]

Have you confirmed "Shell flyout menu missing, when full screen"?
Unable to open the flyout when full screen

[RoiChen001]

@BaY1251 Sorry for the mistake. I can repro it now.