Feature/language flyout

FluentFlyoutWPF/Classes/NativeMethods.cs

@@ -253,6 +253,15 @@ internal struct WindowCompositionAttributeData
     [LibraryImport("user32.dll", SetLastError = true)]
     internal static partial uint GetWindowThreadProcessId(IntPtr hWnd, IntPtr lpdwProcessId);
 
+    [LibraryImport("user32.dll", SetLastError = true)]
+    internal static partial uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
+
+    [LibraryImport("user32.dll")]
+    internal static partial IntPtr GetKeyboardLayout(uint idThread);
+
+    [DllImport("user32.dll", CharSet = CharSet.Auto)]
+    internal static extern bool GetKeyboardLayoutName([Out] StringBuilder pwszKLID);
+
     [LibraryImport("user32.dll", EntryPoint = "SetWindowLongW")]
     internal static partial int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
 

FluentFlyoutWPF/Classes/WindowBlurHelper.cs

@@ -1,4 +1,4 @@
-// Copyright � 2024-2026 The FluentFlyout Authors
+// Copyright � 2024-2026 The FluentFlyout Authors
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 using FluentFlyout.Classes.Settings;
@@ -141,6 +141,7 @@ private static bool ShouldHaveAcrylicBlur(Window window)
             "NextUpWindow" => SettingsManager.Current.NextUpAcrylicWindowEnabled,
             "LockWindow" => SettingsManager.Current.LockKeysAcrylicWindowEnabled,
             "VolumeMixerWindow" => SettingsManager.Current.VolumeMixerAcrylicWindowEnabled,
+            "LanguageWindow" => SettingsManager.Current.LockKeysAcrylicWindowEnabled,
             _ => false
         };
     }

FluentFlyoutWPF/Classes/WindowHelper.cs

@@ -39,16 +39,16 @@ public static void SetVisibility(Window window, bool visible) // workaround to s
         SetWindowPos(handle, 0, 0, 0, 0, 0, (uint)(SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | (visible ? SWP_SHOWWINDOW : SWP_HIDEWINDOW)));
     }
 
-    public static Rect GetPlacement(Window window) // get the window position, ignoring WPF
+    public static Rect GetPlacement(Window window) // get the window position in screen coordinates, ignoring WPF
     {
-        var wp = new NativeMethods.WINDOWPLACEMENT { length = Marshal.SizeOf<NativeMethods.WINDOWPLACEMENT>() };
-
         var handle = new WindowInteropHelper(window).Handle;
-        GetWindowPlacement(handle, ref wp);
-
-        return new Rect(wp.rcNormalPosition.Left, wp.rcNormalPosition.Top, 
-            wp.rcNormalPosition.Right - wp.rcNormalPosition.Left, 
-            wp.rcNormalPosition.Bottom - wp.rcNormalPosition.Top);
+        if (GetWindowRect(handle, out NativeMethods.RECT rect))
+        {
+            return new Rect(rect.Left, rect.Top, rect.Right - rect.Left, rect.Bottom - rect.Top);
+        }
+
+        // Fallback (should not happen for valid windows)
+        return new Rect(window.Left, window.Top, window.Width, window.Height);
     }
 
     public static void SetPosition(Window window, double x, double y, bool async = false) // set the position of the window, ignoring WPF
@@ -66,6 +66,21 @@ public static void SetPosition(Window window, double x, double y, bool async = f
         return;
     }
 
+    public static void SetPositionAndSize(Window window, double x, double y, double width, double height, bool async = false) // set the position and size of the window, ignoring WPF
+    {
+        var handle = new WindowInteropHelper(window).Handle;
+        uint flags = SWP_NOZORDER | (async ? SWP_ASYNCWINDOWPOS : (uint)0);
+        bool result = SetWindowPos(handle, 0, (int)x, (int)y, (int)width, (int)height, flags);
+
+        if (!result)
+        {
+            int error = Marshal.GetLastWin32Error();
+            Logger.Warn($"SetPositionAndSize failed for '{window.GetType().Name}' (HWND=0x{handle.ToInt64():X}, X={x}, Y={y}, W={width}, H={height}, Flags=0x{flags:X}), Win32Error={error}");
+        }
+
+        return;
+    }
+
     public static void SetNoActivate(Window window) // prevent window from stealing focus
     {
         window.SourceInitialized += (sender, e) =>

FluentFlyoutWPF/MainWindow.xaml.cs

@@ -70,6 +70,9 @@ public partial class MainWindow : MicaWindow
     private bool _isHiding = true;
 
     private LockWindow? lockWindow;
+    private LanguageWindow? languageWindow;
+    private IntPtr _lastLanguageLayout = IntPtr.Zero;
+    private DispatcherTimer? _languagePollingTimer;
     private DateTime _lastSelfUpdateTimestamp = DateTime.MinValue;
 
     internal TaskbarWindow? taskbarWindow;
@@ -172,6 +175,14 @@ public MainWindow()
         RegisterShellHookWindow(new WindowInteropHelper(this).Handle);
 
         _positionTimer = new Timer(SeekbarUpdateUi, null, Timeout.Infinite, Timeout.Infinite);
+
+        _languagePollingTimer = new DispatcherTimer
+        {
+            Interval = TimeSpan.FromMilliseconds(75)
+        };
+        _languagePollingTimer.Tick += LanguagePollingTimer_Tick;
+        _languagePollingTimer.Start();
+
         if (_seekBarEnabled && mediaManager.GetFocusedSession() is { } session)
         {
             UpdateSeekbarCurrentDuration(session.ControlSession.GetTimelineProperties().Position);
@@ -314,11 +325,18 @@ public void OpenAnimation(MicaWindow window, bool alwaysBottom = false, MonitorI
         var workArea = monitor.workArea;
 
         // prevent flickering
-        WindowHelper.SetVisibility(window, false); // window.Visibility = Visibility.Hidden works with some delay
+        bool alreadyVisible = window.IsVisible;
+        if (!alreadyVisible) WindowHelper.SetVisibility(window, false); 
 
-        // Update the DPI by moving the window to the target workArea, ignoring WPF scaling
-        WindowHelper.SetPosition(window, workArea.Left, workArea.Top);
-        var windowRect = WindowHelper.GetPlacement(window); // here we take the updated window size in raw coordinates.
+        window.UpdateLayout(); // Ensure layout is computed before querying size
+
+        // Calculate the window size in raw pixels manually to avoid the "jump to top-left".
+        // We use the monitor's DPI directly to scale WPF units.
+        double currentWidth = double.IsNaN(window.Width) ? window.ActualWidth : window.Width;
+        double currentHeight = double.IsNaN(window.Height) ? window.ActualHeight : window.Height;
+        double rawWidth = Math.Ceiling(currentWidth * monitor.dpiX / 96.0);
+        double rawHeight = Math.Ceiling(currentHeight * monitor.dpiY / 96.0);
+        var windowRect = new Rect(0, 0, rawWidth, rawHeight);
 
         double window_left = 0;
 
@@ -417,7 +435,8 @@ public void OpenAnimation(MicaWindow window, bool alwaysBottom = false, MonitorI
         }
 
         // Set the initial position in raw coordinates.
-        WindowHelper.SetPosition(window, window_left, moveAnimation.From!.Value);
+        if (moveAnimation.From != null)
+            WindowHelper.SetPosition(window, window_left, moveAnimation.From.Value);
 
         // Next coordinates will be used to set Window.Top, which takes DPI into account,
         // so we need to convert the coordinates to DPI scale.
@@ -762,6 +781,13 @@ private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
                     lockWindow.ShowLockFlyout("Insert", Keyboard.IsKeyToggled(Key.Insert));
                 }
             }
+
+            // Trigger Language Flyout on Win + Space instantly
+            if (vkCode == 0x20 && (Keyboard.Modifiers & ModifierKeys.Windows) != 0 && wParam == WM_KEYDOWN)
+            {
+                languageWindow ??= new LanguageWindow();
+                languageWindow.ShowLanguageFlyout();
+            }
         }
         return CallNextHookEx(_hookId, nCode, wParam, lParam);
     }
@@ -1401,6 +1427,30 @@ private void NotifyIconQuit_Click(object sender, RoutedEventArgs e)
         }
     }
 
+    private void LanguagePollingTimer_Tick(object? sender, EventArgs e)
+    {
+        if (!SettingsManager.Current.LanguageFlyoutEnabled) return;
+
+        IntPtr foregroundWindow = NativeMethods.GetForegroundWindow();
+        if (foregroundWindow == IntPtr.Zero) return;
+
+        uint threadId = NativeMethods.GetWindowThreadProcessId(foregroundWindow, IntPtr.Zero);
+        IntPtr hkl = NativeMethods.GetKeyboardLayout(threadId);
+
+        if (_lastLanguageLayout == IntPtr.Zero)
+        {
+            _lastLanguageLayout = hkl;
+            return;
+        }
+
+        if (hkl != _lastLanguageLayout)
+        {
+            _lastLanguageLayout = hkl;
+            languageWindow ??= new LanguageWindow();
+            languageWindow.ShowLanguageFlyout();
+        }
+    }
+
     private async Task<bool> WaitForExplorerReadyAsync(int timeoutMs = 60000)
     {
         var sw = Stopwatch.StartNew();

FluentFlyoutWPF/Pages/LockKeysPage.xaml

@@ -25,8 +25,14 @@
                 <RowDefinition Height="Auto" />
                 <RowDefinition Height="Auto" />
                 <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
             </Grid.RowDefinitions>
-            <StackPanel Orientation="Horizontal" Margin="0,0,0,24">
+            <StackPanel Grid.Row="0" Orientation="Horizontal" Margin="0,0,0,24">
                 <Border CornerRadius="10" ClipToBounds="True" Width="164" Height="98">
                     <Border.Background>
                         <ImageBrush ImageSource="/Resources/FluentFlyoutDemo5.1.png" Stretch="UniformToFill" />
@@ -98,7 +104,7 @@
                     <ComboBoxItem Content="{DynamicResource MonitorWithCursor}" />
                 </ComboBox>
             </ui:CardControl>
-            <ui:CardControl Grid.Row="7" Icon="{ui:SymbolIcon Info24}" Margin="0,0,0,76">
+            <ui:CardControl Grid.Row="7" Icon="{ui:SymbolIcon Info24}" Margin="0,0,0,3">
                 <ui:CardControl.Header>
                     <StackPanel Orientation="Vertical">
                         <TextBlock Text="{DynamicResource EnableInsertKeyTitle}" FontSize="14" FontWeight="Regular" VerticalAlignment="Center" />
@@ -107,6 +113,53 @@
                 </ui:CardControl.Header>
                 <controls:ToggleSwitch Name="LockKeysEnableInsertSwitch" IsChecked="{Binding LockKeysInsertEnabled, Mode=TwoWay}" />
             </ui:CardControl>
+
+            <ui:CardControl Grid.Row="8" Icon="{ui:SymbolIcon LocalLanguage24}" Margin="0,24,0,3">
+                <ui:CardControl.Header>
+                    <StackPanel Orientation="Vertical">
+                        <TextBlock Text="{DynamicResource LanguageFlyoutTitle}" FontSize="14" FontWeight="Regular" VerticalAlignment="Center" />
+                        <TextBlock Text="{DynamicResource LanguageFlyoutDescription}" FontSize="12" Opacity="0.5" />
+                    </StackPanel>
+                </ui:CardControl.Header>
+                <controls:ToggleSwitch Name="LanguageFlyoutSwitch" IsChecked="{Binding LanguageFlyoutEnabled, Mode=TwoWay}" />
+            </ui:CardControl>
+
+            <ui:CardControl Grid.Row="9" Icon="{ui:SymbolIcon Info24}" Margin="0,0,0,3">
+                <ui:CardControl.Header>
+                    <StackPanel Orientation="Vertical">
+                        <TextBlock Text="{DynamicResource LanguageFlyoutShowRegionTitle}" FontSize="14" FontWeight="Regular" VerticalAlignment="Center" />
+                        <TextBlock Text="{DynamicResource LanguageFlyoutShowRegionDescription}" FontSize="12" Opacity="0.5" />
+                    </StackPanel>
+                </ui:CardControl.Header>
+                <controls:ToggleSwitch Name="LanguageFlyoutShowRegionSwitch" IsChecked="{Binding LanguageFlyoutShowRegion, Mode=TwoWay}" />
+            </ui:CardControl>
+
+            <ui:CardControl Grid.Row="10" Icon="{ui:SymbolIcon Color24}" Margin="0,0,0,3">
+                <ui:CardControl.Header>
+                    <StackPanel Orientation="Vertical">
+                        <TextBlock Text="{DynamicResource LanguageFlyoutColorModeTitle}" FontSize="14" FontWeight="Regular" VerticalAlignment="Center" />
+                        <TextBlock Text="{DynamicResource LanguageFlyoutColorModeDescription}" FontSize="12" Opacity="0.5" />
+                    </StackPanel>
+                </ui:CardControl.Header>
+                <ComboBox SelectedIndex="{Binding LanguageFlyoutColorMode, Mode=TwoWay}" Width="150">
+                    <ComboBoxItem Content="{DynamicResource LanguageColorModeOption1}" />
+                    <ComboBoxItem Content="{DynamicResource LanguageColorModeOption2}" />
+                    <ComboBoxItem Content="{DynamicResource LanguageColorModeOption3}" />
+                </ComboBox>
+            </ui:CardControl>
+
+            <ui:CardControl Grid.Row="11" Icon="{ui:SymbolIcon Timer24}" Margin="0,0,0,76">
+                <ui:CardControl.Header>
+                    <StackPanel Orientation="Vertical">
+                        <TextBlock Text="{DynamicResource LanguageFlyoutDurationTitle}" FontSize="14" FontWeight="Regular" VerticalAlignment="Center" />
+                        <TextBlock Text="{DynamicResource LanguageFlyoutDurationDescription}" FontSize="12" Opacity="0.5" />
+                    </StackPanel>
+                </ui:CardControl.Header>
+                <StackPanel Orientation="Horizontal">
+                    <ui:TextBox Width="60" ClearButtonEnabled="False" Text="{Binding LanguageFlyoutDurationText, Mode=TwoWay}" />
+                    <TextBlock Text="{DynamicResource MillisecondsUnit}" FontSize="14" FontWeight="Regular" Margin="10,0,0,0" VerticalAlignment="Center" />
+                </StackPanel>
+            </ui:CardControl>
         </Grid>
     </StackPanel>
 </Page>

FluentFlyoutWPF/Resources/Localization/Dictionary-en-US.xaml

@@ -131,6 +131,19 @@ Note: As an open-source project, these features are also available for free via
     <System:String x:Key="MonitorWithCursor">Monitor with cursor</System:String>
     <System:String x:Key="EnableInsertKeyTitle">Enable Insert Key Popup</System:String>
     <System:String x:Key="EnableInsertKeyDescription">Determines whether pressing insert/overwrite will show the flyout</System:String>
+    <System:String x:Key="LanguageFlyoutTitle">Enable Language flyout</System:String>
+    <System:String x:Key="LanguageFlyoutDescription">Show a flyout when the input language (keyboard layout) is changed</System:String>
+    <System:String x:Key="LanguageFlyoutAcrylicTitle">Language Flyout Acrylic</System:String>
+    <System:String x:Key="LanguageFlyoutAcrylicDescription">Apply transparent acrylic blur effect to the language flyout (off reverts to Mica)</System:String>
+    <System:String x:Key="LanguageFlyoutDurationTitle">Language flyout stay duration</System:String>
+    <System:String x:Key="LanguageFlyoutDurationDescription">How long the language flyout stays on the screen</System:String>
+    <System:String x:Key="LanguageFlyoutShowRegionTitle">Show language region</System:String>
+    <System:String x:Key="LanguageFlyoutShowRegionDescription">Show the country/region in parentheses (e.g. Russian (Russia))</System:String>
+    <System:String x:Key="LanguageFlyoutColorModeTitle">Flyout Color Mode</System:String>
+    <System:String x:Key="LanguageFlyoutColorModeDescription">Choose how the flyout accent color is determined</System:String>
+    <System:String x:Key="LanguageColorModeOption1">Automatic</System:String>
+    <System:String x:Key="LanguageColorModeOption2">System Accent</System:String>
+    <System:String x:Key="LanguageColorModeOption3">Unique per Language</System:String>
     <System:String x:Key="LockKeysAnimatedTitle">Indicator Animations</System:String>
     <System:String x:Key="LockKeysAnimatedDescription">Enable subtle animations for the lock key indicator</System:String>
     <System:String x:Key="SystemSettingsTitle">System</System:String>

FluentFlyoutWPF/Resources/Localization/Dictionary-ru.xaml

@@ -231,6 +231,19 @@
     <system:String x:Key="LegacyTaskbarWidthDescription">Используйте классическую систему ширины панели задач для виджетов</system:String>
     <system:String x:Key="TaskbarWidgetAutoHideDescription">Автоматически скрывает виджет при остановке медиа</system:String>
     <system:String x:Key="TaskbarWidgetAutoHideTitle">Автоскрытие виджета</system:String>
+    <system:String x:Key="LanguageFlyoutTitle">Включить уведомление о смене языка</system:String>
+    <system:String x:Key="LanguageFlyoutDescription">Отображать окно при смене раскладки клавиатуры</system:String>
+    <system:String x:Key="LanguageFlyoutAcrylicTitle">Эффект акрилового окна для языка</system:String>
+    <system:String x:Key="LanguageFlyoutAcrylicDescription">Применяет к окну переключения языка эффект акрилового размытия (отключение вернёт эффект Міса)</system:String>
+    <system:String x:Key="LanguageFlyoutDurationTitle">Длительность отображения окна языка</system:String>
+    <system:String x:Key="LanguageFlyoutDurationDescription">Как долго окно выбора языка остается на экране</system:String>
+    <system:String x:Key="LanguageFlyoutShowRegionTitle">Показывать регион языка</system:String>
+    <system:String x:Key="LanguageFlyoutShowRegionDescription">Отображать страну/регион в скобках (например, Русский (Россия))</system:String>
+    <system:String x:Key="LanguageFlyoutColorModeTitle">Цветовой режим окна</system:String>
+    <system:String x:Key="LanguageFlyoutColorModeDescription">Выберите, как определяется цвет акцента окна</system:String>
+    <system:String x:Key="LanguageColorModeOption1">Автоматически</system:String>
+    <system:String x:Key="LanguageColorModeOption2">Системный акцент</system:String>
+    <system:String x:Key="LanguageColorModeOption3">Уникальный для каждого языка</system:String>
     <system:String x:Key="LockKeysAnimatedTitle">Анимация индикаторов</system:String>
     <system:String x:Key="LockKeysAnimatedDescription">Включает ненавязчивую анимацию для индикатора клавиш-переключателей</system:String>
     <system:String x:Key="TaskbarWidgetShowPauseOverlayTitle">Показывать значок паузы (наложение)</system:String>