Added theming system

GUI/AppSettings.cs

@@ -0,0 +1,50 @@
+using System;
+using System.IO;
+using System.Text.Json;
+
+namespace GUI
+{
+    public static class AppSettings
+    {
+        private static readonly string SettingsPath = Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+            "MeiBrowser", "settings.json");
+
+        public static string SelectedTheme { get; set; } = "Dark";
+
+        public static void Load()
+        {
+            try
+            {
+                if (File.Exists(SettingsPath))
+                {
+                    var json = File.ReadAllText(SettingsPath);
+                    var data = JsonSerializer.Deserialize<SettingsData>(json);
+                    if (data != null)
+                        SelectedTheme = data.SelectedTheme ?? "Dark";
+                }
+            }
+            catch { }
+        }
+
+        public static void Save()
+        {
+            try
+            {
+                var dir = Path.GetDirectoryName(SettingsPath);
+                if (!Directory.Exists(dir))
+                    Directory.CreateDirectory(dir!);
+
+                var data = new SettingsData { SelectedTheme = SelectedTheme };
+                var json = JsonSerializer.Serialize(data);
+                File.WriteAllText(SettingsPath, json);
+            }
+            catch { }
+        }
+
+        private class SettingsData
+        {
+            public string? SelectedTheme { get; set; }
+        }
+    }
+}

GUI/MainWindow.xaml

@@ -6,7 +6,7 @@
         xmlns:local="clr-namespace:GUI"
         mc:Ignorable="d"
         Loaded="Window_Loaded"
-        Background="#1E1E1E"
+        Background="{DynamicResource WindowBackgroundBrush}"
         Title="MainWindow" Height="450" Width="800">
 
     <Grid>
@@ -30,9 +30,19 @@
                 Width="150" Height="30" Margin="10,0,0,10"
                 HorizontalAlignment="Center"
                 Click="ResetButton_Click" />
+
+                <ComboBox Grid.Row="0" Grid.Column="2" x:Name="ThemeSelector" 
+                          Width="150" Height="30" Margin="10,0,0,10"
+                          SelectionChanged="Theme_SelectionChanged"
+                          VerticalContentAlignment="Center">
+                    <ComboBoxItem Content="Dark" IsSelected="True"/>
+                    <ComboBoxItem Content="Light"/>
+                    <ComboBoxItem Content="Brown"/>
+                    <ComboBoxItem Content="Custom..."/>
+                </ComboBox>
             </StackPanel>
 
-            <TreeView Background="#2A2A2A" Name="FileTree" Grid.Row="1" Grid.ColumnSpan="2" ItemsSource="{Binding RootItems}">
+            <TreeView Background="{DynamicResource ControlBackgroundBrush}" Name="FileTree" Grid.Row="1" Grid.ColumnSpan="2" ItemsSource="{Binding RootItems}">
                 <TreeView.Resources>
                     <HierarchicalDataTemplate DataType="{x:Type local:FileItem}" ItemsSource="{Binding Children}">
                         <StackPanel Orientation="Horizontal" Margin="2">

GUI/MainWindow.xaml.cs

@@ -11,6 +11,8 @@
 using System.Windows.Shapes;
 using Core;
 using Dark.Net;
+using Microsoft.Win32;
+using System.IO;
 
 namespace GUI
 {
@@ -32,6 +34,7 @@ public partial class MainWindow : Window
         private string downloadUrl = "";
 
         private string appVersion = "1.1";
+        private bool isInitializing = true;
 
         public MainWindow()
         {
@@ -56,6 +59,19 @@ public MainWindow()
         #region package selection
         private async void Window_Loaded(object sender, RoutedEventArgs e)
         {
+            AppSettings.Load();
+            ApplyTheme(AppSettings.SelectedTheme);
+
+            for (int i = 0; i < ThemeSelector.Items.Count; i++)
+            {
+                if (ThemeSelector.Items[i] is ComboBoxItem item && item.Content.ToString() == AppSettings.SelectedTheme)
+                {
+                    ThemeSelector.SelectedIndex = i;
+                    break;
+                }
+            }
+
+            isInitializing = false;
             await ShowPopup();
         }
 
@@ -283,6 +299,105 @@ private async Task StartDownload(string savePath)
             DownloadingOverlay.Visibility = Visibility.Collapsed;
         }
         #endregion
+
+        private void Theme_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            if (isInitializing) return;
+
+            if (ThemeSelector.SelectedItem is ComboBoxItem item)
+            {
+                string choice = item.Content.ToString();
+
+                if (choice == "Custom...")
+                {
+                    var dialog = new OpenFileDialog();
+                    dialog.Filter = "XAML Theme Files (*.xaml)|*.xaml";
+                    if (dialog.ShowDialog() == true)
+                    {
+                        try
+                        {
+                            var customDict = new ResourceDictionary { Source = new Uri(dialog.FileName) };
+                            if (!customDict.Contains("WindowBackgroundColor"))
+                            {
+                                MessageBox.Show("Invalid theme file: Missing 'WindowBackgroundColor'.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+                                return;
+                            }
+
+                            Application.Current.Resources.MergedDictionaries.Clear();
+                            Application.Current.Resources.MergedDictionaries.Add(customDict);
+
+                            if (customDict["WindowBackgroundColor"] is Color bgColor)
+                            {
+                                double luminance = (0.299 * bgColor.R + 0.587 * bgColor.G + 0.114 * bgColor.B) / 255;
+                                DarkNet.Instance.SetWindowThemeWpf(this, luminance > 0.5 ? Theme.Light : Theme.Dark);
+                            }
+
+                            AppSettings.SelectedTheme = dialog.FileName;
+                            AppSettings.Save();
+                            return;
+                        }
+                        catch (Exception ex)
+                        {
+                            MessageBox.Show($"Failed to load theme: {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+                            return;
+                        }
+                    }
+                    else
+                    {
+                        return;
+                    }
+                }
+
+                ApplyTheme(choice);
+                AppSettings.SelectedTheme = choice;
+                AppSettings.Save();
+            }
+        }
+
+        private void ApplyTheme(string themeName)
+        {
+            Uri themeUri = null;
+            Theme darkNetTheme = Theme.Dark;
+
+            if (themeName == "Dark")
+            {
+                themeUri = new Uri("Themes/Dark.xaml", UriKind.Relative);
+                darkNetTheme = Theme.Dark;
+            }
+            else if (themeName == "Light")
+            {
+                themeUri = new Uri("Themes/Light.xaml", UriKind.Relative);
+                darkNetTheme = Theme.Light;
+            }
+            else if (themeName == "Brown")
+            {
+                themeUri = new Uri("Themes/Brown.xaml", UriKind.Relative);
+                darkNetTheme = Theme.Dark;
+            }
+            else if (File.Exists(themeName))
+            {
+                try
+                {
+                    var customDict = new ResourceDictionary { Source = new Uri(themeName) };
+                    Application.Current.Resources.MergedDictionaries.Clear();
+                    Application.Current.Resources.MergedDictionaries.Add(customDict);
+                    if (customDict["WindowBackgroundColor"] is Color bgColor)
+                    {
+                        double luminance = (0.299 * bgColor.R + 0.587 * bgColor.G + 0.114 * bgColor.B) / 255;
+                        DarkNet.Instance.SetWindowThemeWpf(this, luminance > 0.5 ? Theme.Light : Theme.Dark);
+                    }
+                    return;
+                }
+                catch { }
+            }
+
+            if (themeUri != null)
+            {
+                Application.Current.Resources.MergedDictionaries.Clear();
+                Application.Current.Resources.MergedDictionaries.Add(new ResourceDictionary { Source = themeUri });
+                DarkNet.Instance.SetWindowThemeWpf(this, darkNetTheme);
+            }
+        }
     }
 
     public class FileItem
@@ -308,4 +423,5 @@ public FileItem(string name, long sizeInBytes, FileItem? parent = null, SophonMa
             ElementsCount = 0;
         }
     }
-}
+
+}

GUI/StartDialog.xaml

@@ -7,8 +7,8 @@
         WindowStartupLocation="CenterOwner"
         WindowStyle="ToolWindow" ResizeMode="NoResize"
         mc:Ignorable="d"
-        Background="#1E1E1E"
-        Title="StartDialog" Height="470" Width="600">
+        Background="{DynamicResource WindowBackgroundBrush}"
+        Title="Select Game Options" Height="470" Width="600">
 
     <Grid>
         <Grid Margin="20">
@@ -33,7 +33,7 @@
                 SelectionChanged="ModeCombo_SelectionChanged" />
 
             <Button x:Name="ModeHelpButton" Grid.Row="0" Grid.Column="2" Content="Infos" Height="32" Width="75"
-                HorizontalAlignment="Right" Click="ModeHelpButton_Click"  Background="#2A2A2A"/>
+                HorizontalAlignment="Right" Click="ModeHelpButton_Click" />
 
             <!-- Game -->
             <TextBlock Grid.Row="1" Grid.Column="0" Text="Game:" VerticalAlignment="Center"/>
@@ -56,9 +56,9 @@
 
             <!-- Custom sophon -->
             <TextBlock x:Name="CustomSophonTitle" Visibility="Hidden" Grid.Row="2" Grid.Column="0" Text="URL:" VerticalAlignment="Center"/>
-            <TextBox Visibility="Hidden" x:Name="CustomSophonUrl" Margin="15" Grid.Column="1" Grid.Row="2" Height="30" Background="#2A2A2A" Foreground="White" BorderThickness="1"/>
+            <TextBox Visibility="Hidden" x:Name="CustomSophonUrl" Margin="15" Grid.Column="1" Grid.Row="2" Height="30" Background="{DynamicResource ControlBackgroundBrush}" Foreground="{DynamicResource WindowForegroundBrush}" BorderThickness="1"/>
             <Button Visibility="Hidden" x:Name="CheckSophonButton" Grid.Row="2" Grid.Column="2" Content="Check" Height="32" Width="75"
-                HorizontalAlignment="Right" Click="CheckSophonButton_Click"  Background="#2A2A2A"/>
+                HorizontalAlignment="Right" Click="CheckSophonButton_Click" />
 
             <!-- Version -->
             <TextBlock Grid.Row="3" Grid.Column="0" Text="Version:" VerticalAlignment="Center"/>
@@ -77,12 +77,12 @@
             <CheckBox x:Name="DiffMode" IsEnabled="False" Margin="15" Grid.Row="5" Grid.Column="1" Grid.ColumnSpan="2" Content="Only show new/changed files from previous version" IsThreeState="False"/>
 
             <Button x:Name="ConfirmButton" IsEnabled="False" Grid.Row="6" Grid.Column="1" Grid.ColumnSpan="2" Content="Confirm" Height="32" Width="100"
-                HorizontalAlignment="Right" Click="Confirm_Click" Background="#2A2A2A"/>
+                HorizontalAlignment="Right" Click="Confirm_Click" />
         </Grid>
 
         <Grid x:Name="LoadingOverlay" Background="#80000000" Visibility="Collapsed" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" >
             <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
-                <TextBlock Text="Loading..." Foreground="White" FontSize="16" HorizontalAlignment="Center"/>
+                <TextBlock Text="Loading..." Foreground="{DynamicResource WindowForegroundBrush}" FontSize="16" HorizontalAlignment="Center"/>
                 <ProgressBar IsIndeterminate="True" Width="200" Height="20"/>
             </StackPanel>
         </Grid>

GUI/Themes/Brown.xaml

@@ -0,0 +1,14 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <Color x:Key="WindowBackgroundColor">#3E2723</Color>
+    <Color x:Key="WindowForegroundColor">#D7CCC8</Color>
+
+    <SolidColorBrush x:Key="WindowBackgroundBrush" Color="{StaticResource WindowBackgroundColor}"/>
+    <SolidColorBrush x:Key="WindowForegroundBrush" Color="{StaticResource WindowForegroundColor}"/>
+
+    <SolidColorBrush x:Key="ControlBackgroundBrush" Color="#4E342E"/>
+    <SolidColorBrush x:Key="ControlBorderBrush" Color="#6D4C41"/>
+    <SolidColorBrush x:Key="ControlHighlightBrush" Color="#795548"/>
+    <SolidColorBrush x:Key="ControlDisabledBrush" Color="#3E2723"/>
+    <SolidColorBrush x:Key="ControlDisabledForegroundBrush" Color="#8D6E63"/>
+</ResourceDictionary>

GUI/Themes/Dark.xaml

@@ -0,0 +1,14 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <Color x:Key="WindowBackgroundColor">#1E1E1E</Color>
+    <Color x:Key="WindowForegroundColor">#E0E0E0</Color>
+
+    <SolidColorBrush x:Key="WindowBackgroundBrush" Color="{StaticResource WindowBackgroundColor}"/>
+    <SolidColorBrush x:Key="WindowForegroundBrush" Color="{StaticResource WindowForegroundColor}"/>
+
+    <SolidColorBrush x:Key="ControlBackgroundBrush" Color="#2A2A2A"/>
+    <SolidColorBrush x:Key="ControlBorderBrush" Color="#3A3A3A"/>
+    <SolidColorBrush x:Key="ControlHighlightBrush" Color="#4A4A4A"/>
+    <SolidColorBrush x:Key="ControlDisabledBrush" Color="#1A1A1A"/>
+    <SolidColorBrush x:Key="ControlDisabledForegroundBrush" Color="#666666"/>
+</ResourceDictionary>

GUI/Themes/Light.xaml

@@ -0,0 +1,14 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <Color x:Key="WindowBackgroundColor">#FFFFFF</Color>
+    <Color x:Key="WindowForegroundColor">#000000</Color>
+
+    <SolidColorBrush x:Key="WindowBackgroundBrush" Color="{StaticResource WindowBackgroundColor}"/>
+    <SolidColorBrush x:Key="WindowForegroundBrush" Color="{StaticResource WindowForegroundColor}"/>
+
+    <SolidColorBrush x:Key="ControlBackgroundBrush" Color="#F0F0F0"/>
+    <SolidColorBrush x:Key="ControlBorderBrush" Color="#CCCCCC"/>
+    <SolidColorBrush x:Key="ControlHighlightBrush" Color="#E0E0E0"/>
+    <SolidColorBrush x:Key="ControlDisabledBrush" Color="#DDDDDD"/>
+    <SolidColorBrush x:Key="ControlDisabledForegroundBrush" Color="#AAAAAA"/>
+</ResourceDictionary>