更新整理

WPFluent.Gallery/Helpers/EnumToBooleanConverter.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.
+
+namespace WPFluent.Gallery.Helpers;
+
+internal sealed class EnumToBooleanConverter : IValueConverter
+{
+    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        if (parameter is not string enumString)
+        {
+            throw new ArgumentException("ExceptionEnumToBooleanConverterParameterMustBeAnEnumName");
+        }
+
+        if (!Enum.IsDefined(typeof(WPFluent.Appearance.ApplicationTheme), value))
+        {
+            throw new ArgumentException("ExceptionEnumToBooleanConverterValueMustBeAnEnum");
+        }
+
+        var enumValue = Enum.Parse(typeof(WPFluent.Appearance.ApplicationTheme), enumString);
+
+        return enumValue.Equals(value);
+    }
+
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        if (parameter is not string enumString)
+        {
+            throw new ArgumentException("ExceptionEnumToBooleanConverterParameterMustBeAnEnumName");
+        }
+
+        return Enum.Parse(typeof(WPFluent.Appearance.ApplicationTheme), enumString);
+    }
+}

WPFluent.Gallery/Helpers/NameToPageTypeConverter.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 System.Reflection;
+
+namespace WPFluent.Gallery.Helpers;
+
+internal sealed class NameToPageTypeConverter
+{
+    private static readonly Type[] PageTypes = Assembly
+        .GetExecutingAssembly()
+        .GetTypes()
+        .Where(t => t.Namespace?.StartsWith("WPFluent.Gallery.Views.Pages") ?? false)
+        .ToArray();
+
+    public static Type? Convert(string pageName)
+    {
+        pageName = pageName.Trim().ToLower() + "page";
+
+        return PageTypes.FirstOrDefault(singlePageType =>
+            singlePageType.Name.Equals(pageName, StringComparison.CurrentCultureIgnoreCase)
+        );
+    }
+}

WPFluent.Gallery/Helpers/NullToVisibilityConverter.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.
+
+namespace WPFluent.Gallery.Helpers;
+
+internal sealed class NullToVisibilityConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return value is null ? Visibility.Collapsed : Visibility.Visible;
+    }
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        throw new NotImplementedException();
+    }
+}

WPFluent.Gallery/Helpers/PaneDisplayModeToIndexConverter.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.Controls;
+
+namespace WPFluent.Gallery.Helpers;
+
+internal sealed class PaneDisplayModeToIndexConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return value switch
+        {
+            NavigationViewPaneDisplayMode.LeftFluent => 1,
+            NavigationViewPaneDisplayMode.Top => 2,
+            NavigationViewPaneDisplayMode.Bottom => 3,
+            _ => 0,
+        };
+    }
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return value switch
+        {
+            1 => NavigationViewPaneDisplayMode.LeftFluent,
+            2 => NavigationViewPaneDisplayMode.Top,
+            3 => NavigationViewPaneDisplayMode.Bottom,
+            _ => NavigationViewPaneDisplayMode.Left,
+        };
+    }
+}

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;
+    }
+}