更新整理

WPFluent.Gallery/Helpers/ThemeToIndexConverter.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+
+
+using WPFluent.Appearance;
+
+namespace WPFluent.Gallery.Helpers;
+
+internal sealed class ThemeToIndexConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is ApplicationTheme.Dark)
+        {
+            return 1;
+        }
+
+        if (value is ApplicationTheme.HighContrast)
+        {
+            return 2;
+        }
+
+        return 0;
+    }
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is 1)
+        {
+            return ApplicationTheme.Dark;
+        }
+
+        if (value is 2)
+        {
+            return ApplicationTheme.HighContrast;
+        }
+
+        return ApplicationTheme.Light;
+    }
+}