default transparent tite bar, when create a new window

Question

I am using depency injection, to create the man window

  public partial class App : Application {

        private IHost _host;

        public App() {
            InitializeComponent();

        }

        protected override void OnLaunched(LaunchActivatedEventArgs args) {
            _host = Host.CreateDefaultBuilder()
                .ConfigureServices(ConfigureServices)
                .Build();

            // Start the host
            _host.Start();

            // Resolve and activate the main window using dependency injection
            var mainWindow = _host.Services.GetRequiredService<NavWindow>();
            mainWindow.Activate();

        }

        private void ConfigureServices(IServiceCollection services) {
            // Register your dependencies here
            services.AddSingleton<NavWindowViewModel>();
            services.AddSingleton(provider => new NavWindow(provider.GetRequiredService<NavWindowViewModel>()));

            services.AddSingleton<SubjectsPageViewModel>();

            // Add other services as needed
        }
    }
}

What I want to do is that every time I create a new Wndows, it will have a tranparent tiitle bar.

I found this

https://learn.microsoft.com/en-us/windows/apps/develop/title-bar?msclkid=e23d7633cf9311eca704e47ee540cf97&tabs=wasdk#simple-customization

and I implemented it but I get

I want something like

I dont want to do this in every window

     private AppWindow m_AppWindow;

        public NavWindowViewModel ViewModel { get; set; }

        public NavWindow(NavWindowViewModel viewModel) {
            InitializeComponent();
            ViewModel = viewModel;
            ExtendsContentIntoTitleBar = true;
            SetTitleBarColors();

            // Subscribe to the message
            WeakReferenceMessenger.Default.Register<NavigationViewItem>(this,
                HandleSelectedItemMessage);
        }

        private void HandleSelectedItemMessage(object recipient, NavigationViewItem message) {
            if (message != null) {

                var tag = message.Tag.ToString();
                NavFrame.Navigate(PageTypeMapper.PageTypeDictionary[tag]);
            }
        }

        private bool SetTitleBarColors() {
            // Check to see if customization is supported.
            // The method returns true on Windows 10 since Windows App SDK 1.2, and on all versions of
            // Windows App SDK on Windows 11.
            if (AppWindowTitleBar.IsCustomizationSupported()) {
                if (m_AppWindow is null) {
                    m_AppWindow = GetAppWindowForCurrentWindow();
                }
                var titleBar = m_AppWindow.TitleBar;

                // Set active window colors
                // Note: No effect when app is running on Windows 10 since color customization is not
                // supported.
                titleBar.ForegroundColor = Colors.Transparent;
                titleBar.ButtonForegroundColor = Colors.Transparent;
                titleBar.ButtonBackgroundColor = Colors.Transparent;
                titleBar.ButtonHoverForegroundColor = Colors.Transparent;
                titleBar.ButtonHoverBackgroundColor = Colors.DarkSeaGreen;
                titleBar.ButtonPressedForegroundColor = Colors.Gray;
                titleBar.ButtonPressedBackgroundColor = Colors.LightGreen;

                // Set inactive window colors
                // Note: No effect when app is running on Windows 10 since color customization is not
                // supported.
                titleBar.InactiveForegroundColor = Colors.Gainsboro;
                titleBar.InactiveBackgroundColor = Colors.SeaGreen;
                titleBar.ButtonInactiveForegroundColor = Colors.Gainsboro;
                titleBar.ButtonInactiveBackgroundColor = Colors.SeaGreen;
                return true;
            }
            return false;
        }

        private AppWindow GetAppWindowForCurrentWindow() {
            IntPtr hWnd = WindowNative.GetWindowHandle(this);
            WindowId wndId = Win32Interop.GetWindowIdFromWindow(hWnd);
            return AppWindow.GetFromWindowId(wndId);
        }
    }
}

The problem with this approach is that is for a specific Window, what happends if I create a new one?

Also it overlaps my navView

Code: https://github.com/eduardoagr/Demy-AI/tree/master/Demy

Answer 1

Hello,

Welcome to Microsoft Q&A!

There is no way to make every window have a transparent title bar. You must set the transparent title bar separately for every window.

Thank you.

Jeanine

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