更新整理

WPFluent.Gallery/Helpers/PaneDisplayModeToIndexConverter.cs

@@ -0,0 +1,33 @@
+// 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,
+        };
+    }
+}