Fix browser commands

ILSpy.Core/Commands/ILSpyCommands.cs

@@ -34,8 +34,8 @@ namespace ICSharpCode.ILSpy
 
     public static class NavigationCommands
     {
-        public static RoutedCommand BrowseBack { get; } = new RoutedCommand(nameof(BrowseBack), new KeyGesture { Modifiers = InputModifiers.Control, Key = Key.BrowserBack });
-        public static RoutedCommand BrowseForward { get; } = new RoutedCommand(nameof(BrowseForward), new KeyGesture { Modifiers = InputModifiers.Control, Key = Key.BrowserForward });
+        public static RoutedCommand BrowseBack { get; } = new NavigationCommand(nameof(BrowseBack), new KeyGesture { Modifiers = InputModifiers.Control, Key = Key.BrowserBack });
+        public static RoutedCommand BrowseForward { get; } = new NavigationCommand(nameof(BrowseForward), new KeyGesture { Modifiers = InputModifiers.Control, Key = Key.BrowserForward });
         public static RoutedCommand Search { get; } = new RoutedCommand(nameof(Search), new KeyGesture { Modifiers = InputModifiers.Control | InputModifiers.Shift, Key = Key.F });
     }
 

ILSpy.Core/Commands/NavigationCommand.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Windows.Input;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+using AvaloniaEdit;
+
+namespace ICSharpCode.ILSpy
+{
+    /// <summary>
+    /// Navigation command. CanExecuteChanged will get called when focused is changed. 
+    /// </summary>
+    internal class NavigationCommand: RoutedCommand, ICommand
+    {
+        static EventHandler interactiveEventHandler;
+
+        static NavigationCommand()
+        {
+            InputElement.GotFocusEvent.AddClassHandler(typeof(InputElement), HandlePointerEvent);
+        }
+
+        public NavigationCommand(string name, KeyGesture keyGesture) : base(name, keyGesture)
+        {
+        }
+
+        private static void HandlePointerEvent(object sender, RoutedEventArgs args)
+        {
+            interactiveEventHandler?.Invoke(sender, args);
+        }
+
+        event EventHandler ICommand.CanExecuteChanged
+        {
+            add { interactiveEventHandler += value; }
+            remove { interactiveEventHandler -= value; }
+        }
+    }
+}

SharpTreeView/SharpTreeView.cs

@@ -257,9 +257,6 @@ namespace ICSharpCode.TreeView
 			if (doNotScrollOnExpanding)
 				return;
 
-            // TODO: make sure node is materialized
-            return;
-
 			SharpTreeNode lastVisibleChild = node;
 			while (true) {
 				SharpTreeNode tmp = lastVisibleChild.Children.LastOrDefault(c => c.IsVisible);
@@ -301,10 +298,10 @@ namespace ICSharpCode.TreeView
 						if (!container.Node.IsExpanded && container.Node.ShowExpander) {
 							container.Node.IsExpanded = true;
 						} else if (container.Node.Children.Count > 0) {
-							// jump to first child:
+                            // jump to first child:
 							
-							//container.MoveFocus(new TraversalRequest(FocusNavigationDirection.Down));
-						}
+                            //container.MoveFocus(new TraversalRequest(FocusNavigationDirection.Down));
+                        }
 						e.Handled = true;
 					}
 					break;