Import Theme Size / Select Default Font / Small Design Fixes

Flow.Launcher.Core/Resource/Theme.cs

@@ -325,7 +325,7 @@ private ResourceDictionary GetResourceDictionary(string theme)
             return dict;
         }
 
-        private ResourceDictionary GetCurrentResourceDictionary()
+        public ResourceDictionary GetCurrentResourceDictionary()
         {
             return GetResourceDictionary(_settings.Theme);
         }
@@ -772,22 +772,18 @@ private void ApplyPreviewBackground(Color? bgColor = null)
         {
             if (bgColor == null) return;
 
-            // Copy the existing WindowBorderStyle
+            // Create a new Style for the preview
             var previewStyle = new Style(typeof(Border));
-            if (Application.Current.Resources.Contains("WindowBorderStyle"))
+
+            // Get the original WindowBorderStyle
+            if (Application.Current.Resources.Contains("WindowBorderStyle") &&
+                Application.Current.Resources["WindowBorderStyle"] is Style originalStyle)
             {
-                if (Application.Current.Resources["WindowBorderStyle"] is Style originalStyle)
-                {
-                    foreach (var setter in originalStyle.Setters.OfType<Setter>())
-                    {
-                        previewStyle.Setters.Add(new Setter(setter.Property, setter.Value));
-                    }
-                }
+                // Copy the original style, including the base style if it exists
+                CopyStyle(originalStyle, previewStyle);
             }
 
             // Apply background color (remove transparency in color)
-            // WPF does not allow the use of an acrylic brush within the window's internal area,
-            // so transparency effects are not applied to the preview.
             Color backgroundColor = Color.FromRgb(bgColor.Value.R, bgColor.Value.G, bgColor.Value.B);
             previewStyle.Setters.Add(new Setter(Border.BackgroundProperty, new SolidColorBrush(backgroundColor)));
 
@@ -798,9 +794,26 @@ private void ApplyPreviewBackground(Color? bgColor = null)
                 previewStyle.Setters.Add(new Setter(Border.CornerRadiusProperty, new CornerRadius(5)));
                 previewStyle.Setters.Add(new Setter(Border.BorderThicknessProperty, new Thickness(1)));
             }
+
+            // Set the new style to the resource
             Application.Current.Resources["PreviewWindowBorderStyle"] = previewStyle;
         }
 
+        private void CopyStyle(Style originalStyle, Style targetStyle)
+        {
+            // If the style is based on another style, copy the base style first
+            if (originalStyle.BasedOn != null)
+            {
+                CopyStyle(originalStyle.BasedOn, targetStyle);
+            }
+
+            // Copy the setters from the original style
+            foreach (var setter in originalStyle.Setters.OfType<Setter>())
+            {
+                targetStyle.Setters.Add(new Setter(setter.Property, setter.Value));
+            }
+        }
+
         private void ColorizeWindow(string theme, BackdropTypes backdropType)
         {
             var dict = GetThemeResourceDictionary(theme);

Flow.Launcher.Infrastructure/UserSettings/Settings.cs

@@ -1,15 +1,20 @@
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Diagnostics;
 using System.Drawing;
+using System.Globalization;
+using System.Linq;
 using System.Text.Json.Serialization;
 using System.Windows;
+using System.Windows.Media;
 using CommunityToolkit.Mvvm.DependencyInjection;
 using Flow.Launcher.Infrastructure.Hotkey;
 using Flow.Launcher.Infrastructure.Logger;
 using Flow.Launcher.Infrastructure.Storage;
 using Flow.Launcher.Plugin;
 using Flow.Launcher.Plugin.SharedModels;
 using Flow.Launcher.ViewModel;
+using SystemFonts = System.Windows.SystemFonts;
 
 namespace Flow.Launcher.Infrastructure.UserSettings
 {
@@ -34,6 +39,66 @@ public void Save()
         }
 
         private string language = Constant.SystemLanguageCode;
+        private static readonly Dictionary<string, string> LanguageToNotoSans = new()
+        {
+            { "ko", "Noto Sans KR" },
+            { "ja", "Noto Sans JP" },
+            { "zh-CN", "Noto Sans SC" },
+            { "zh-SG", "Noto Sans SC" },
+            { "zh-Hans", "Noto Sans SC" },
+            { "zh-TW", "Noto Sans TC" },
+            { "zh-HK", "Noto Sans TC" },
+            { "zh-MO", "Noto Sans TC" },
+            { "zh-Hant", "Noto Sans TC" },
+            { "th", "Noto Sans Thai" },
+            { "ar", "Noto Sans Arabic" },
+            { "he", "Noto Sans Hebrew" },
+            { "hi", "Noto Sans Devanagari" },
+            { "bn", "Noto Sans Bengali" },
+            { "ta", "Noto Sans Tamil" },
+            { "el", "Noto Sans Greek" },
+            { "ru", "Noto Sans" },
+            { "en", "Noto Sans" },
+            { "fr", "Noto Sans" },
+            { "de", "Noto Sans" },
+            { "es", "Noto Sans" },
+            { "pt", "Noto Sans" }
+        };
+
+        public static string GetSystemDefaultFont()
+        {
+            try
+            {
+                var culture = CultureInfo.CurrentCulture;
+                var language = culture.Name; // e.g., "zh-TW"
+                var langPrefix = language.Split('-')[0]; // e.g., "zh"
+
+                // First, try to find by full name, and if not found, fallback to prefix
+                if (TryGetNotoFont(language, out var notoFont) || TryGetNotoFont(langPrefix, out notoFont))
+                {
+                    if (Fonts.SystemFontFamilies.Any(f => f.Source.Equals(notoFont)))
+                        return notoFont;
+                }
+
+                var font = SystemFonts.MessageFontFamily;
+                if (font.FamilyNames.TryGetValue(System.Windows.Markup.XmlLanguage.GetLanguage("en-US"), out var englishName))
+                {
+                    return englishName;
+                }
+
+                return font.Source ?? "Segoe UI";
+            }
+            catch
+            {
+                return "Segoe UI";
+            }
+        }
+
+        private static bool TryGetNotoFont(string langKey, out string notoFont)
+        {
+            return LanguageToNotoSans.TryGetValue(langKey, out notoFont);
+        }
+
         private string _theme = Constant.DefaultTheme;
         public string Hotkey { get; set; } = $"{KeyConstant.Alt} + {KeyConstant.Space}";
         public string OpenResultModifiers { get; set; } = KeyConstant.Alt;
@@ -82,18 +147,18 @@ public string Theme
         /* Appearance Settings. It should be separated from the setting later.*/
         public double WindowHeightSize { get; set; } = 42;
         public double ItemHeightSize { get; set; } = 58;
-        public double QueryBoxFontSize { get; set; } = 20;
+        public double QueryBoxFontSize { get; set; } = 16;
         public double ResultItemFontSize { get; set; } = 16;
         public double ResultSubItemFontSize { get; set; } = 13;
-        public string QueryBoxFont { get; set; } = FontFamily.GenericSansSerif.Name;
+        public string QueryBoxFont { get; set; } = GetSystemDefaultFont();
         public string QueryBoxFontStyle { get; set; }
         public string QueryBoxFontWeight { get; set; }
         public string QueryBoxFontStretch { get; set; }
-        public string ResultFont { get; set; } = FontFamily.GenericSansSerif.Name;
+        public string ResultFont { get; set; } = GetSystemDefaultFont();
         public string ResultFontStyle { get; set; }
         public string ResultFontWeight { get; set; }
         public string ResultFontStretch { get; set; }
-        public string ResultSubFont { get; set; } = FontFamily.GenericSansSerif.Name;
+        public string ResultSubFont { get; set; } = GetSystemDefaultFont();
         public string ResultSubFontStyle { get; set; }
         public string ResultSubFontWeight { get; set; }
         public string ResultSubFontStretch { get; set; }
@@ -116,7 +181,7 @@ public string Theme
         public double? SettingWindowLeft { get; set; } = null;
         public WindowState SettingWindowState { get; set; } = WindowState.Normal;
 
-        bool _showPlaceholder { get; set; } = false;
+        bool _showPlaceholder { get; set; } = true;
         public bool ShowPlaceholder
         {
             get => _showPlaceholder;
@@ -142,7 +207,6 @@ public string PlaceholderText
                 }
             }
         }
-
         public int CustomExplorerIndex { get; set; } = 0;
 
         [JsonIgnore]
@@ -487,4 +551,5 @@ public enum BackdropTypes
         Mica,
         MicaAlt
     }
+
 }

Flow.Launcher/Languages/en.xaml

@@ -199,6 +199,9 @@
     <system:String x:Key="resultItemFont">Result Title Font</system:String>
     <system:String x:Key="resultSubItemFont">Result Subtitle Font</system:String>
     <system:String x:Key="resetCustomize">Reset</system:String>
+    <system:String x:Key="resetCustomizeToolTip">Reset to the recommended font and size settings.</system:String>
+    <system:String x:Key="ImportThemeSize">Import Theme Size</system:String>
+    <system:String x:Key="ImportThemeSizeToolTip">If a size value intended by the theme designer is available, it will be retrieved and applied.</system:String>
     <system:String x:Key="CustomizeToolTip">Customize</system:String>
     <system:String x:Key="windowMode">Window Mode</system:String>
     <system:String x:Key="opacity">Opacity</system:String>
@@ -226,6 +229,7 @@
     <system:String x:Key="Clock">Clock</system:String>
     <system:String x:Key="Date">Date</system:String>
     <system:String x:Key="BackdropType">Backdrop Type</system:String>
+    <system:String x:Key="BackdropInfo">The backdrop effect is not applied in the preview.</system:String>
     <system:String x:Key="BackdropTypeDisabledToolTip">Backdrop supported starting from Windows 11 build 22000 and above</system:String>
     <system:String x:Key="BackdropTypesNone">None</system:String>
     <system:String x:Key="BackdropTypesAcrylic">Acrylic</system:String>

Flow.Launcher/Resources/CustomControlTemplate.xaml

@@ -755,25 +755,41 @@
                 <ControlTemplate TargetType="ComboBoxItem">
                     <Border
                         x:Name="LayoutRoot"
+                        Margin="0 2 0 2"
                         Background="{TemplateBinding Background}"
                         BorderBrush="{TemplateBinding BorderBrush}"
                         BorderThickness="{TemplateBinding BorderThickness}"
+                        CornerRadius="4"
                         SnapsToDevicePixels="True">
-                        <ContentPresenter
-                            x:Name="ContentPresenter"
-                            Margin="{TemplateBinding Padding}"
-                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
-                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
-                            SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
-                            TextElement.Foreground="{TemplateBinding Foreground}" />
+                        <Grid>
+                            <Grid.ColumnDefinitions>
+                                <ColumnDefinition Width="Auto" />
+                                <ColumnDefinition />
+                            </Grid.ColumnDefinitions>
+                            <Border
+                                x:Name="ComboBullet"
+                                Grid.Column="0"
+                                Width="3"
+                                Height="14"
+                                Background="Transparent"
+                                CornerRadius="2" />
+                            <ContentPresenter
+                                x:Name="ContentPresenter"
+                                Grid.Column="1"
+                                Margin="{TemplateBinding Padding}"
+                                HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                                VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                                SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
+                                TextElement.Foreground="{TemplateBinding Foreground}" />
+                        </Grid>
                     </Border>
                     <ControlTemplate.Triggers>
                         <MultiTrigger>
                             <MultiTrigger.Conditions>
                                 <Condition Property="IsSelected" Value="False" />
                                 <Condition Property="IsMouseOver" Value="True" />
                             </MultiTrigger.Conditions>
-                            <Setter TargetName="LayoutRoot" Property="Background" Value="{DynamicResource ComboBoxItemBackgroundPointerOver}" />
+                            <Setter TargetName="LayoutRoot" Property="Background" Value="{DynamicResource CustomComboItemHoverBG}" />
                             <Setter TargetName="LayoutRoot" Property="BorderBrush" Value="{DynamicResource ComboBoxItemBorderBrushPointerOver}" />
                             <Setter TargetName="ContentPresenter" Property="TextElement.Foreground" Value="{DynamicResource ComboBoxItemForegroundPointerOver}" />
                         </MultiTrigger>
@@ -792,7 +808,8 @@
                                 <Condition Property="IsSelected" Value="True" />
                                 <Condition Property="IsFocused" Value="True" />
                             </MultiTrigger.Conditions>
-                            <Setter TargetName="LayoutRoot" Property="Background" Value="{DynamicResource ComboBoxItemBackgroundSelected}" />
+                            <Setter TargetName="ComboBullet" Property="Background" Value="{StaticResource SystemControlBackgroundAccentBrush}" />
+                            <Setter TargetName="LayoutRoot" Property="Background" Value="{DynamicResource CustomComboItemHoverBG}" />
                             <Setter TargetName="LayoutRoot" Property="BorderBrush" Value="{DynamicResource ComboBoxItemBorderBrushSelected}" />
                             <Setter TargetName="ContentPresenter" Property="TextElement.Foreground" Value="{DynamicResource ComboBoxItemForegroundSelected}" />
                         </MultiTrigger>
@@ -802,7 +819,8 @@
                                 <Condition Property="IsSelected" Value="True" />
                                 <Condition Property="IsFocused" Value="False" />
                             </MultiTrigger.Conditions>
-                            <Setter TargetName="LayoutRoot" Property="Background" Value="{DynamicResource ComboBoxItemBackgroundSelectedUnfocused}" />
+                            <Setter TargetName="ComboBullet" Property="Background" Value="{StaticResource SystemControlBackgroundAccentBrush}" />
+                            <Setter TargetName="LayoutRoot" Property="Background" Value="{DynamicResource CustomComboItemHoverBG}" />
                             <Setter TargetName="LayoutRoot" Property="BorderBrush" Value="{DynamicResource ComboBoxItemBorderBrushSelectedUnfocused}" />
                             <Setter TargetName="ContentPresenter" Property="TextElement.Foreground" Value="{DynamicResource ComboBoxItemForegroundSelectedUnfocused}" />
                         </MultiTrigger>
@@ -822,7 +840,7 @@
                                 <Condition Property="IsSelected" Value="True" />
                                 <Condition Property="IsMouseOver" Value="True" />
                             </MultiTrigger.Conditions>
-                            <Setter TargetName="LayoutRoot" Property="Background" Value="{DynamicResource ComboBoxItemBackgroundSelectedPointerOver}" />
+                            <Setter TargetName="LayoutRoot" Property="Background" Value="{DynamicResource CustomComboItemSelectedHoverBG}" />
                             <Setter TargetName="LayoutRoot" Property="BorderBrush" Value="{DynamicResource ComboBoxItemBorderBrushSelectedPointerOver}" />
                             <Setter TargetName="ContentPresenter" Property="TextElement.Foreground" Value="{DynamicResource ComboBoxItemForegroundSelectedPointerOver}" />
                         </MultiTrigger>
@@ -1103,7 +1121,8 @@
                             IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}"
                             Placement="Bottom"
                             PlacementTarget="{Binding ElementName=Background}"
-                            PopupAnimation="None">
+                            PopupAnimation="None"
+                            VerticalOffset="-1">
                             <Popup.PlacementRectangle>
                                 <MultiBinding>
                                     <MultiBinding.Converter>
@@ -1123,11 +1142,11 @@
                                 <Border
                                     x:Name="PopupBorder"
                                     HorizontalAlignment="Stretch"
-                                    Background="{DynamicResource PopUpBorderBG}"
-                                    CornerRadius="{DynamicResource OverlayCornerRadius}">
+                                    Background="{DynamicResource CustomPopUpBorderBG}"
+                                    CornerRadius="5">
                                     <Border
-                                        Padding="{DynamicResource ComboBoxDropdownBorderPadding}"
-                                        BorderBrush="{DynamicResource ComboBoxDropDownBorderBrush}"
+                                        Padding="5"
+                                        BorderBrush="{DynamicResource CustomComboBorder}"
                                         BorderThickness="{DynamicResource ComboBoxDropdownBorderThickness}"
                                         CornerRadius="{Binding ElementName=PopupBorder, Path=CornerRadius}">
                                         <ScrollViewer
@@ -1137,7 +1156,7 @@
                                             IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}"
                                             VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
                                             <ItemsPresenter
-                                                Margin="{DynamicResource ComboBoxDropdownContentMargin}"
+                                                Margin="0"
                                                 KeyboardNavigation.DirectionalNavigation="Contained"
                                                 SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                                         </ScrollViewer>
@@ -1157,8 +1176,8 @@
                         <!--  Pressed  -->
                         <Trigger SourceName="ToggleButton" Property="IsPressed" Value="True">
                             <Setter TargetName="Background" Property="Background" Value="{DynamicResource CustomComboPressedBG}" />
-                            <Setter TargetName="Background" Property="BorderThickness" Value="0" />
-                            <Setter TargetName="Background" Property="BorderBrush" Value="{DynamicResource ComboBoxBorderBrushPressed}" />
+                            <Setter TargetName="Background" Property="BorderThickness" Value="0 0 0 1" />
+                            <Setter TargetName="Background" Property="BorderBrush" Value="{DynamicResource CustomComboPressedOutLine}" />
                             <Setter TargetName="OutLine" Property="BorderBrush" Value="{DynamicResource CustomComboPressedOutLine}" />
                             <Setter TargetName="OutLine" Property="BorderThickness" Value="{DynamicResource PressedCustomComboOutlineThickness}" />
                             <Setter TargetName="ContentPresenter" Property="TextElement.Foreground" Value="{DynamicResource CustomComboPressedText}" />