Improve WPF dark titlebar handling

TwitchDownloaderWPF/App.xaml

@@ -41,7 +41,7 @@
             <SolidColorBrush x:Key="StatusBarText" Color="#212121" />
             <SolidColorBrush x:Key="ProgressBarForeground" Color="#326CF3" />
 
-            <Style TargetType="{x:Type Window}">
+            <Style TargetType="{x:Type local:MainWindow}">
                 <Setter Property="behave:WindowIntegrityCheckBehavior.IntegrityCheck" Value="True"></Setter>
             </Style>
         </ResourceDictionary>

TwitchDownloaderWPF/App.xaml.cs

@@ -54,8 +54,8 @@ private static void CurrentDomain_UnhandledException(object sender, UnhandledExc
             Current?.Shutdown();
         }
 
-        public static void RequestAppThemeChange()
-            => ThemeServiceSingleton.ChangeAppTheme();
+        public static void RequestAppThemeChange(bool forceRepaint = false)
+            => ThemeServiceSingleton.ChangeAppTheme(forceRepaint);
 
         public static void RequestTitleBarChange()
             => ThemeServiceSingleton.SetTitleBarTheme(Current.Windows);

TwitchDownloaderWPF/MainWindow.xaml

@@ -9,7 +9,7 @@
         lex:ResxLocalizationProvider.DefaultAssembly="TwitchDownloaderWPF"
         lex:ResxLocalizationProvider.DefaultDictionary="Strings"
         mc:Ignorable="d"
-        Title="Twitch Downloader" MinHeight="440" Height="500" MinWidth="700" Width="850" Loaded="Window_Loaded">
+        Title="Twitch Downloader" MinHeight="440" Height="500" MinWidth="700" Width="850" Loaded="Window_Loaded" SourceInitialized="Window_OnSourceInitialized">
     <Grid Background="{DynamicResource AppBackground}">
         <Grid.RowDefinitions>
             <RowDefinition Height="2" />

TwitchDownloaderWPF/MainWindow.xaml.cs

@@ -63,10 +63,13 @@ private void btnQueue_Click(object sender, RoutedEventArgs e)
             Main.Content = pageQueue;
         }
 
-        private async void Window_Loaded(object sender, RoutedEventArgs e)
+        private void Window_OnSourceInitialized(object sender, EventArgs e)
         {
             App.RequestAppThemeChange();
+        }
 
+        private async void Window_Loaded(object sender, RoutedEventArgs e)
+        {
             Main.Content = pageVodDownload;
             if (Settings.Default.UpgradeRequired)
             {

TwitchDownloaderWPF/Services/ThemeService.cs

@@ -66,11 +66,11 @@ private void WindowsThemeChanged(object sender, string newWindowsTheme)
 
             if (Settings.Default.GuiTheme.Equals("System", StringComparison.OrdinalIgnoreCase))
             {
-                ChangeAppTheme();
+                ChangeAppTheme(true);
             }
         }
 
-        public void ChangeAppTheme()
+        public void ChangeAppTheme(bool forceRepaint = false)
         {
             var newTheme = Settings.Default.GuiTheme;
             if (newTheme.Equals("System", StringComparison.OrdinalIgnoreCase))
@@ -87,6 +87,20 @@ public void ChangeAppTheme()
             {
                 SetTitleBarTheme(_wpfApplication.Windows);
             }
+
+            if (forceRepaint)
+            {
+                // Cause an NC repaint by changing focus
+                var wnd = new Window
+                {
+                    SizeToContent = SizeToContent.WidthAndHeight,
+                    Top = int.MinValue + 1,
+                    WindowStyle = WindowStyle.None,
+                    ShowInTaskbar = false
+                };
+                wnd.Show();
+                wnd.Close();
+            }
         }
 
         [SupportedOSPlatform("windows")]
@@ -111,19 +125,6 @@ public void SetTitleBarTheme(WindowCollection windows)
                     _ = NativeFunctions.SetWindowAttribute(windowHandle, darkTitleBarAttribute, &shouldUseDarkTitleBar, sizeof(int));
                 }
             }
-
-            Window wnd = new()
-            {
-                SizeToContent = SizeToContent.WidthAndHeight,
-                Top = int.MinValue + 1,
-                WindowStyle = WindowStyle.None,
-                ShowInTaskbar = false
-            };
-            wnd.Show();
-            wnd.Close();
-            // Dark title bar is a bit buggy, requires window redraw (focus change, resize, transparency change) to fully apply.
-            // We *could* send a repaint message to win32.dll, but this solution works and is way easier.
-            // Win11 might not have this issue but Win10 does so please leave this
         }
 
         private void ChangeThemePath(string newTheme)

TwitchDownloaderWPF/WindowMassDownload.xaml

@@ -13,7 +13,7 @@
         xmlns:emoji="clr-namespace:Emoji.Wpf;assembly=Emoji.Wpf"
         xmlns:gif="http://wpfanimatedgif.codeplex.com"
         mc:Ignorable="d"
-        Title="Mass Downloader" MinHeight="250" Height="700" MinWidth="775" Width="1100" Loaded="Window_Loaded">
+        Title="Mass Downloader" MinHeight="250" Height="700" MinWidth="775" Width="1100" Loaded="Window_Loaded" SourceInitialized="Window_OnSourceInitialized">
     <Window.Resources>
         <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}">
             <Setter Property="behave:TextBoxTripleClickBehavior.TripleClickSelectLine" Value="True" />

TwitchDownloaderWPF/WindowMassDownload.xaml.cs

@@ -254,12 +254,16 @@ private void btnSelectAll_Click(object sender, RoutedEventArgs e)
             textCount.Text = selectedItems.Count.ToString();
         }
 
+        private void Window_OnSourceInitialized(object sender, EventArgs e)
+        {
+            App.RequestTitleBarChange();
+        }
+
         private void Window_Loaded(object sender, RoutedEventArgs e)
         {
             Title = downloaderType == DownloadType.Video
                 ? Translations.Strings.TitleVideoMassDownloader
                 : Translations.Strings.TitleClipMassDownloader;
-            App.RequestTitleBarChange();
         }
 
         private async void TextChannel_OnKeyDown(object sender, KeyEventArgs e)

TwitchDownloaderWPF/WindowOldVideoCacheManager.xaml

@@ -11,7 +11,7 @@
         lex:ResxLocalizationProvider.DefaultAssembly="TwitchDownloaderWPF"
         lex:ResxLocalizationProvider.DefaultDictionary="Strings"
         mc:Ignorable="d"
-        Title="{lex:Loc TitleWindowOldVideoCacheManager}" MinHeight="350" MinWidth="500" Height="450" Width="800" Loaded="OnLoaded" Closing="OnClosing" d:DataContext="{d:DesignInstance local:WindowOldVideoCacheManager}">
+        Title="{lex:Loc TitleWindowOldVideoCacheManager}" MinHeight="350" MinWidth="500" Height="450" Width="800" Loaded="OnLoaded" SourceInitialized="OnSourceInitialized" Closing="OnClosing" d:DataContext="{d:DesignInstance local:WindowOldVideoCacheManager}">
     <Window.Resources>
         <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}">
             <Setter Property="behave:TextBoxTripleClickBehavior.TripleClickSelectLine" Value="True" />

TwitchDownloaderWPF/WindowOldVideoCacheManager.xaml.cs

@@ -37,16 +37,17 @@ public WindowOldVideoCacheManager(IEnumerable<DirectoryInfo> directories)
             InitializeComponent();
         }
 
-        private void OnLoaded(object sender, RoutedEventArgs e)
+        private void OnSourceInitialized(object sender, EventArgs e)
         {
             App.RequestTitleBarChange();
+        }
 
-            // For some stupid reason, this does not work unless I manually set it, even though its a binding
-            DataGrid.ItemsSource = GridItems;
-
+        private void OnLoaded(object sender, RoutedEventArgs e)
+        {
             // Do this the dumb way because bindings are annoying without view models
             var sizeString = VideoSizeEstimator.StringifyByteCount(_totalSize);
             TextTotalSize.Text = string.IsNullOrEmpty(sizeString) ? "0B" : sizeString;
+            DataGrid.ItemsSource = GridItems;
         }
 
         private void OnClosing(object sender, CancelEventArgs e)

TwitchDownloaderWPF/WindowQueueOptions.xaml

@@ -10,7 +10,7 @@
         lex:ResxLocalizationProvider.DefaultAssembly="TwitchDownloaderWPF"
         lex:ResxLocalizationProvider.DefaultDictionary="Strings"
         mc:Ignorable="d"
-        Title="{lex:Loc TitleEnqueueOptions}" MinHeight="280" Height="280" MinWidth="500" Width="500" SizeToContent="WidthAndHeight" Loaded="Window_loaded" Background="{DynamicResource AppBackground}">
+        Title="{lex:Loc TitleEnqueueOptions}" MinHeight="280" Height="280" MinWidth="500" Width="500" SizeToContent="WidthAndHeight" SourceInitialized="Window_OnSourceInitialized" Background="{DynamicResource AppBackground}">
     <Window.Resources>
         <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}">
             <Setter Property="behave:TextBoxTripleClickBehavior.TripleClickSelectLine" Value="True" />

TwitchDownloaderWPF/WindowQueueOptions.xaml.cs

@@ -682,7 +682,7 @@ private void radioHTML_Checked(object sender, RoutedEventArgs e)
             }
         }
 
-        private void Window_loaded(object sender, RoutedEventArgs e)
+        private void Window_OnSourceInitialized(object sender, EventArgs e)
         {
             App.RequestTitleBarChange();
         }

TwitchDownloaderWPF/WindowRangeSelect.xaml

@@ -10,7 +10,7 @@
         lex:ResxLocalizationProvider.DefaultAssembly="TwitchDownloaderWPF"
         lex:ResxLocalizationProvider.DefaultDictionary="Strings"
         mc:Ignorable="d"
-        Title="{lex:Loc TitleRenderRange}" Height="150" Width="400" Background="#FFEFEFEF" Initialized="Window_Initialized" Loaded="Window_Loaded">
+        Title="{lex:Loc TitleRenderRange}" Height="150" Width="400" Background="#FFEFEFEF" Initialized="Window_Initialized" SourceInitialized="Window_OnSourceInitialized">
     <Window.Resources>
         <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}">
             <Setter Property="behave:TextBoxTripleClickBehavior.TripleClickSelectLine" Value="True" />

TwitchDownloaderWPF/WindowRangeSelect.xaml.cs

@@ -75,7 +75,7 @@ private void numEnd_TextChanged(object sender, TextChangedEventArgs e)
             catch (OverflowException) { }
         }
 
-        private void Window_Loaded(object sender, RoutedEventArgs e)
+        private void Window_OnSourceInitialized(object sender, EventArgs e)
         {
             App.RequestTitleBarChange();
         }

TwitchDownloaderWPF/WindowSettings.xaml

@@ -12,7 +12,7 @@
         xmlns:hc="https://handyorg.github.io/handycontrol"
         xmlns:fa="http://schemas.fontawesome.com/icons/"
         mc:Ignorable="d"
-        Title="{lex:Loc TitleGlobalSettings}" MinWidth="400" MinHeight="500" Width="500" Height="592" SizeToContent="Height" Initialized="Window_Initialized" Closing="Window_Closing" Loaded="Window_Loaded" Background="{DynamicResource AppBackground}">
+        Title="{lex:Loc TitleGlobalSettings}" MinWidth="400" MinHeight="500" Width="500" Height="592" SizeToContent="Height" Initialized="Window_Initialized" Closing="Window_Closing" SourceInitialized="Window_OnSourceInitialized" Background="{DynamicResource AppBackground}">
     <Window.Resources>
         <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}">
             <Setter Property="behave:TextBoxTripleClickBehavior.TripleClickSelectLine" Value="True" />

TwitchDownloaderWPF/WindowSettings.xaml.cs

@@ -118,7 +118,7 @@ private void BtnClearCache_Click(object sender, RoutedEventArgs e)
             }
         }
 
-        private void Window_Loaded(object sender, RoutedEventArgs e)
+        private void Window_OnSourceInitialized(object sender, EventArgs e)
         {
             App.RequestTitleBarChange();
         }
@@ -162,7 +162,7 @@ private void ComboTheme_OnSelectionChanged(object sender, SelectionChangedEventA
             {
                 _refreshThemeOnCancel = true;
                 Settings.Default.GuiTheme = (string)ComboTheme.SelectedItem;
-                App.RequestAppThemeChange();
+                App.RequestAppThemeChange(true);
             }
         }
 

TwitchDownloaderWPF/WindowUrlList.xaml

@@ -10,7 +10,7 @@
         lex:ResxLocalizationProvider.DefaultAssembly="TwitchDownloaderWPF"
         lex:ResxLocalizationProvider.DefaultDictionary="Strings"
         mc:Ignorable="d"
-        Title="{lex:Loc TitleUrlList}" MinHeight="590" Height="600" MinWidth="485" Width="500" Loaded="Window_Loaded">
+        Title="{lex:Loc TitleUrlList}" MinHeight="590" Height="600" MinWidth="485" Width="500" SourceInitialized="Window_OnSourceInitialized">
     <Window.Resources>
         <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}">
             <Setter Property="behave:TextBoxTripleClickBehavior.TripleClickSelectLine" Value="True" />

TwitchDownloaderWPF/WindowUrlList.xaml.cs

@@ -167,7 +167,7 @@ private async void btnQueue_Click(object sender, RoutedEventArgs e)
             btnQueue.IsEnabled = true;
         }
 
-        private void Window_Loaded(object sender, RoutedEventArgs e)
+        private void Window_OnSourceInitialized(object sender, EventArgs e)
         {
             App.RequestTitleBarChange();
         }