Add BackdropType in setting

Author: onesounds

Flow.Launcher.Infrastructure/UserSettings/Settings.cs

@@ -76,6 +76,8 @@ public string Theme
         }
         public bool UseDropShadowEffect { get; set; } = true;
 
+        public BackdropTypes BackdropType{ get; set; } = BackdropTypes.None;
+
         /* Appearance Settings. It should be separated from the setting later.*/
         public double WindowHeightSize { get; set; } = 42;
         public double ItemHeightSize { get; set; } = 58;
@@ -426,4 +428,12 @@ public enum AnimationSpeeds
         Fast,
         Custom
     }
+
+    public enum BackdropTypes
+    {
+        None,    
+        Acrylic,
+        Mica,
+        MicaAlt
+    }
 }

Flow.Launcher/SettingPages/ViewModels/SettingsPaneThemeViewModel.cs

@@ -15,6 +15,8 @@
 using ModernWpf;
 using ThemeManager = Flow.Launcher.Core.Resource.ThemeManager;
 using ThemeManagerForColorSchemeSwitch = ModernWpf.ThemeManager;
+using static Flow.Launcher.Core.Resource.Theme;
+using System.Windows.Interop;
 
 namespace Flow.Launcher.SettingPages.ViewModels;
 
@@ -177,6 +179,54 @@ public bool UseAnimation
     public class AnimationSpeedData : DropdownDataGeneric<AnimationSpeeds> { }
     public List<AnimationSpeedData> AnimationSpeeds { get; } = DropdownDataGeneric<AnimationSpeeds>.GetValues<AnimationSpeedData>("AnimationSpeed");
 
+    public class BackdropTypeData : DropdownDataGeneric<BackdropTypes>
+    {
+        public void ApplyBackdrop()
+        {
+            IntPtr hWnd = new WindowInteropHelper(Application.Current.MainWindow).Handle;
+            if (hWnd == IntPtr.Zero)
+                return;
+
+            int backdropValue = Value switch
+            {
+                BackdropTypes.Acrylic => 3, // ✅ Acrylic (DWM_SYSTEMBACKDROP_TYPE = 3)
+                BackdropTypes.Mica => 2,    // ✅ Mica (DWM_SYSTEMBACKDROP_TYPE = 2)
+                BackdropTypes.MicaAlt => 4, // ✅ MicaAlt (DWM_SYSTEMBACKDROP_TYPE = 4)
+                _ => 0                      // ✅ None (DWM_SYSTEMBACKDROP_TYPE = 0)
+            };
+
+            Methods.SetWindowAttribute(hWnd, ParameterTypes.DWMWINDOWATTRIBUTE.DWMWA_SYSTEMBACKDROP_TYPE, backdropValue);
+        }
+    }
+
+    // ✅ BackdropTypeData 리스트 (Dropdown과 연동)
+    public List<BackdropTypeData> BackdropTypesList { get; } =
+        DropdownDataGeneric<BackdropTypes>.GetValues<BackdropTypeData>("BackdropTypes");
+
+    // ✅ BackdropType 속성 (값 저장 + 자동 적용)
+    public BackdropTypes BackdropType
+    {
+        get => Enum.IsDefined(typeof(BackdropTypes), Settings.BackdropType)
+               ? (BackdropTypes)Settings.BackdropType
+               : BackdropTypes.None;
+
+        set
+        {
+            if (!Enum.IsDefined(typeof(BackdropTypes), value))
+            {
+                value = BackdropTypes.None;
+            }
+
+            Settings.BackdropType = value;
+
+            // ✅ BackdropTypeData 리스트에서 해당하는 값 찾기
+            var backdropData = BackdropTypesList.FirstOrDefault(b => b.Value == value);
+            backdropData?.ApplyBackdrop();
+        }
+    }
+
+
+
     public bool UseSound
     {
         get => Settings.UseSound;

Flow.Launcher/SettingPages/Views/SettingsPaneTheme.xaml

@@ -370,6 +370,25 @@
                     </DockPanel>
                 </Border>
             </Grid>
+
+            <!--  Drop shadow effect  -->
+            <cc:Card
+                Title="Backdrop Type"
+                Margin="0 8 0 0"
+                Icon="&#xeb91;"
+                Sub="{DynamicResource shadowEffectRestart}">
+
+                <ComboBox
+                    MinWidth="160"
+                    VerticalAlignment="Center"
+                    DisplayMemberPath="Display"
+                    FontSize="14"
+                    ItemsSource="{Binding BackdropTypesList}"
+                    SelectedValue="{Binding BackdropType, Mode=TwoWay}"
+                    SelectedValuePath="Value" />
+            </cc:Card>
+
+
             <!--  Drop shadow effect  -->
             <cc:Card
                 Title="{DynamicResource queryWindowShadowEffect}"