WIP

2024-05-05 09:42:21 +01:00
parent 53efbb13c5
commit 287aa3131b
4 changed files with 111 additions and 86 deletions
@@ -0,0 +1,68 @@
+using Avalonia;
+using Avalonia.Interactivity;
+using Avalonia.LogicalTree;
+using Toolkit.UI.Controls.Avalonia;
+
+namespace Toolkit.UI.Avalonia;
+
+public class NavigationViewItemExtension
+{
+    public static readonly AttachedProperty<bool> IsItemClickEnabledProperty =
+        AvaloniaProperty.RegisterAttached<NavigationViewItem, bool>("IsItemClickEnabled",
+            typeof(NavigationViewItemExtension), false);
+
+    public static readonly RoutedEvent<ItemInvokedEventArgs> ItemClickEvent = 
+        RoutedEvent.Register<ItemInvokedEventArgs>("ItemClick", 
+            RoutingStrategies.Bubble, typeof(NavigationViewItemExtension));
+
+    static NavigationViewItemExtension()
+    {
+        IsItemClickEnabledProperty.Changed.AddClassHandler<NavigationViewItem>(OnIsItemClickEnabledPropertyChanged);
+    }
+
+    private static void OnIsItemClickEnabledPropertyChanged(NavigationViewItem sender, 
+        AvaloniaPropertyChangedEventArgs args)
+    {
+        bool TrySetupNavigationView()
+        {
+            if (sender.GetLogicalAncestors().OfType<NavigationView>().FirstOrDefault() is NavigationView navigationView)
+            {
+                void OnItemInvoked(object? _, FluentAvalonia.UI.Controls.NavigationViewItemInvokedEventArgs args)
+                {
+                    if (args.InvokedItemContainer == sender)
+                    {
+                        sender.RaiseEvent(new ItemInvokedEventArgs { RoutedEvent = ItemClickEvent });
+                    }
+                }
+
+                navigationView.ItemInvoked += OnItemInvoked;
+                return true;
+            }
+
+            return false;
+        }
+
+        if (!TrySetupNavigationView())
+        { 
+            void OnAttachedToVisualTree(object? _, VisualTreeAttachmentEventArgs __)
+            {
+                sender.AttachedToVisualTree -= OnAttachedToVisualTree;
+                TrySetupNavigationView();
+            }
+
+            sender.AttachedToVisualTree += OnAttachedToVisualTree;
+        }
+    }
+
+    public static bool GetIsItemClickEnabled(NavigationViewItem element) =>
+        element.GetValue(IsItemClickEnabledProperty);
+
+    public static void SetIsItemClickEnabled(NavigationViewItem element, bool value) => 
+        element.SetValue(IsItemClickEnabledProperty, value);
+
+    public static void AddItemClickHandler(NavigationViewItem element, EventHandler<ItemInvokedEventArgs> handler) => 
+        element.AddHandler(ItemClickEvent, handler);
+
+    public static void RemoveItemClickHandler(NavigationViewItem element, EventHandler<ItemInvokedEventArgs> handler) =>
+        element.RemoveHandler(ItemClickEvent, handler);
+}