更新整理

WPFluent.Gallery/Controls/GalleryNavigationPresenter.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.Controls;
+
+public class GalleryNavigationPresenter : System.Windows.Controls.Control
+{
+    /// <summary>Identifies the <see cref="ItemsSource"/> dependency property.</summary>
+    public static readonly DependencyProperty ItemsSourceProperty = DependencyProperty.Register(
+        nameof(ItemsSource),
+        typeof(object),
+        typeof(GalleryNavigationPresenter),
+        new PropertyMetadata(null)
+    );
+
+    /// <summary>Identifies the <see cref="TemplateButtonCommand"/> dependency property.</summary>
+    public static readonly DependencyProperty TemplateButtonCommandProperty = DependencyProperty.Register(
+        nameof(TemplateButtonCommand),
+        typeof(WPFluent.Input.IRelayCommand),
+        typeof(GalleryNavigationPresenter),
+        new PropertyMetadata(null)
+    );
+
+    public object? ItemsSource
+    {
+        get => GetValue(ItemsSourceProperty);
+        set => SetValue(ItemsSourceProperty, value);
+    }
+
+    /// <summary>
+    /// Gets the command triggered after clicking the titlebar button.
+    /// </summary>
+    public WPFluent.Input.IRelayCommand TemplateButtonCommand =>
+        (WPFluent.Input.IRelayCommand)GetValue(TemplateButtonCommandProperty);
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="GalleryNavigationPresenter"/> class.
+    /// Creates a new instance of the class and sets the default <see cref="FrameworkElement.Loaded"/> event.
+    /// </summary>
+    public GalleryNavigationPresenter()
+    {
+        SetValue(TemplateButtonCommandProperty, new Input.RelayCommand<Type>(o => OnTemplateButtonClick(o)));
+    }
+
+    private void OnTemplateButtonClick(Type? pageType)
+    {
+        INavigationService navigationService = App.GetRequiredService<INavigationService>();
+
+        if (pageType is not null)
+        {
+            _ = navigationService.Navigate(pageType);
+        }
+
+        System.Diagnostics.Debug.WriteLine(
+            $"INFO | {nameof(GalleryNavigationPresenter)} navigated, ({pageType})",
+            "WPFluent.Gallery"
+        );
+    }
+}