WIn_RustTools/RustTools/Views/ShellPage.xaml.cs

using Microsoft.UI.Input;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Input;

using RustTools.Contracts.Services;
using RustTools.Helpers;
using RustTools.muqing;
using RustTools.ViewModels;
using Windows.Foundation;
using Windows.System;

namespace RustTools.Views;

// TODO: Update NavigationViewItem titles and icons in ShellPage.xaml.
public sealed partial class ShellPage : Page
{
    public ShellViewModel ViewModel
    {
        get;
    }

    public ShellPage(ShellViewModel viewModel)
    {
        ViewModel = viewModel;
        InitializeComponent();

        ViewModel.NavigationService.Frame = NavigationFrame;
        //ViewModel.NavigationService.UnregisterFrameEvents();
        ViewModel.NavigationViewService.Initialize(NavigationViewControl);

        // TODO: Set the title bar icon by updating /Assets/WindowIcon.ico.
        // A custom title bar is required for full window theme and Mica support.
        // https://docs.microsoft.com/windows/apps/develop/title-bar?tabs=winui3#full-customization
        if (App.MainWindow != null)
        {
            App.MainWindow.SetTitleBar(AppTitleBar);
            App.MainWindow.Activated += MainWindow_Activated;
        }
        AppTitleBarText.Text = "app_name".GetLocalized() + " PC";//+ "app_version".GetLocalized();
    }
    private void OnLoaded(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (App.MainWindow?.ExtendsContentIntoTitleBar == true)
        {
            // Update interactive regions if the size of the window changes.
            SetRegionsForCustomTitleBar();
        }
        //TitleBarHelper.UpdateTitleBar(RequestedTheme);

        //KeyboardAccelerators.Add(BuildKeyboardAccelerator(VirtualKey.Left, VirtualKeyModifiers.Menu));
        //KeyboardAccelerators.Add(BuildKeyboardAccelerator(VirtualKey.GoBack));
    }

    private void SetRegionsForCustomTitleBar()
    {
        // Specify the interactive regions of the title bar.
        var m_AppWindow = App.MainWindow?.AppWindow;
        if (m_AppWindow == null) { return; }
        var scaleAdjustment = AppTitleBar.XamlRoot.RasterizationScale;
        var transform = TitleBarSearchBox.TransformToVisual(null);
        var bounds = transform.TransformBounds(new Rect(0, 0,
                                                         TitleBarSearchBox.ActualWidth,
                                                         TitleBarSearchBox.ActualHeight));
        Windows.Graphics.RectInt32 SearchBoxRect = GetRect(bounds, scaleAdjustment);

        var rectArray = new Windows.Graphics.RectInt32[] { SearchBoxRect };

        InputNonClientPointerSource nonClientInputSrc =
            InputNonClientPointerSource.GetForWindowId(m_AppWindow.Id);
        nonClientInputSrc.SetRegionRects(NonClientRegionKind.Passthrough, rectArray);
    }

    private Windows.Graphics.RectInt32 GetRect(Rect bounds, double scale)
    {
        return new Windows.Graphics.RectInt32(
            _X: (int)Math.Round(bounds.X * scale),
            _Y: (int)Math.Round(bounds.Y * scale),
            _Width: (int)Math.Round(bounds.Width * scale),
            _Height: (int)Math.Round(bounds.Height * scale)
        );
    }

    private void MainWindow_Activated(object sender, WindowActivatedEventArgs args)
    {
        App.AppTitlebar = AppTitleBarText;
    }

    //DisplayModeChanged="NavigationViewControl_DisplayModeChanged"
    private void NavigationViewControl_DisplayModeChanged(NavigationView sender, NavigationViewDisplayModeChangedEventArgs args)
    {
        AppTitleBar.Margin = new Thickness()
        {
            Left = sender.CompactPaneLength * (sender.DisplayMode == NavigationViewDisplayMode.Minimal ? 2 : 1),
            //Left = sender.CompactPaneLength,
            Top = AppTitleBar.Margin.Top,
            Right = AppTitleBar.Margin.Right,
            Bottom = AppTitleBar.Margin.Bottom
        };
    }

    private static KeyboardAccelerator BuildKeyboardAccelerator(VirtualKey key, VirtualKeyModifiers? modifiers = null)
    {
        var keyboardAccelerator = new KeyboardAccelerator() { Key = key };

        if (modifiers.HasValue)
        {
            keyboardAccelerator.Modifiers = modifiers.Value;
        }

        keyboardAccelerator.Invoked += OnKeyboardAcceleratorInvoked;

        return keyboardAccelerator;
    }

    private static void OnKeyboardAcceleratorInvoked(KeyboardAccelerator sender, KeyboardAcceleratorInvokedEventArgs args)
    {
        var navigationService = App.GetService<INavigationService>();

        var result = navigationService.GoBack();

        args.Handled = result;
    }

    private void Page_SizeChanged(object sender, SizeChangedEventArgs e)
    {
        if (App.MainWindow?.ExtendsContentIntoTitleBar == true)
        {
            // Update interactive regions if the size of the window changes.
            SetRegionsForCustomTitleBar();
        }

    }

    private void TitleBarSearchBox_QuerySubmitted(AutoSuggestBox sender, AutoSuggestBoxQuerySubmittedEventArgs args)
    {
        var text = sender.Text;
        NavigationFrame.Navigate(typeof(SearchModPage),text);
        NavigationFrame.BackStack.Clear();
        //ViewModel.NavigationService.Frame.Visibility= Visibility.Collapsed;
    }
}