ryujinx/src/Ryujinx/UI/Windows/StyleableWindow.cs

using Avalonia.Controls;
using Avalonia.Controls.Primitives;
using Avalonia.Media;
using Avalonia.Platform;
using FluentAvalonia.UI.Windowing;
using Ryujinx.Ava.Common.Locale;
using Ryujinx.Ava.UI.ViewModels;

namespace Ryujinx.Ava.UI.Windows
{
    public abstract class StyleableAppWindow : AppWindow
    {
        protected StyleableAppWindow()
        {
            WindowStartupLocation = WindowStartupLocation.CenterOwner;
            TransparencyLevelHint = [WindowTransparencyLevel.None];

            LocaleManager.Instance.LocaleChanged += LocaleChanged;
            LocaleChanged();
            
            Icon = MainWindowViewModel.IconBitmap;
        }

        private void LocaleChanged()
        {
            FlowDirection = LocaleManager.Instance.IsRTL() ? FlowDirection.RightToLeft : FlowDirection.LeftToRight;
        }

        protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
        {
            base.OnApplyTemplate(e);

            ExtendClientAreaChromeHints = ExtendClientAreaChromeHints.SystemChrome | ExtendClientAreaChromeHints.OSXThickTitleBar;
        }
    }

    public abstract class StyleableWindow : Window
    {
        protected StyleableWindow()
        {
            WindowStartupLocation = WindowStartupLocation.CenterOwner;
            TransparencyLevelHint = [WindowTransparencyLevel.None];

            LocaleManager.Instance.LocaleChanged += LocaleChanged;
            LocaleChanged();

            Icon = new WindowIcon(MainWindowViewModel.IconBitmap);
        }

        private void LocaleChanged()
        {
            FlowDirection = LocaleManager.Instance.IsRTL() ? FlowDirection.RightToLeft : FlowDirection.LeftToRight;
        }

        protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
        {
            base.OnApplyTemplate(e);

            ExtendClientAreaChromeHints = ExtendClientAreaChromeHints.SystemChrome | ExtendClientAreaChromeHints.OSXThickTitleBar;
        }
    }
}