fix

src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs

@@ -99,7 +99,7 @@ namespace Avalonia.Controls.Platform
             {
                 root.Deactivated -= WindowDeactivated;
             }
-            
+
             if (_root is TopLevel tl)
                 tl.PlatformImpl.LostFocus -= TopLevelLostPlatformFocus;
 
@@ -148,116 +148,116 @@ namespace Avalonia.Controls.Platform
             {
                 case Key.Up:
                 case Key.Down:
-                {
-                    if (item?.IsTopLevel == true)
                     {
-                        if (item.HasSubMenu && !item.IsSubMenuOpen)
+                        if (item?.IsTopLevel == true)
                         {
-                            Open(item, true);
-                            e.Handled = true;
+                            if (item.HasSubMenu && !item.IsSubMenuOpen)
+                            {
+                                Open(item, true);
+                                e.Handled = true;
+                            }
                         }
+                        else
+                        {
+                            goto default;
+                        }
+                        break;
                     }
-                    else
-                    {
-                        goto default;
-                    }
-                    break;
-                }
 
                 case Key.Left:
-                {
-                    if (item?.Parent is IMenuItem parent && !parent.IsTopLevel && parent.IsSubMenuOpen)
                     {
-                        parent.Close();
-                        parent.Focus();
-                        e.Handled = true;
-                    }
-                    else
-                    {
-                        goto default;
+                        if (item?.Parent is IMenuItem parent && !parent.IsTopLevel && parent.IsSubMenuOpen)
+                        {
+                            parent.Close();
+                            parent.Focus();
+                            e.Handled = true;
+                        }
+                        else
+                        {
+                            goto default;
+                        }
+                        break;
                     }
-                    break;
-                }
 
                 case Key.Right:
-                {
-                    if (item != null && !item.IsTopLevel && item.HasSubMenu)
                     {
-                        Open(item, true);
-                        e.Handled = true;
+                        if (item != null && !item.IsTopLevel && item.HasSubMenu)
+                        {
+                            Open(item, true);
+                            e.Handled = true;
+                        }
+                        else
+                        {
+                            goto default;
+                        }
+                        break;
                     }
-                    else
+
+                case Key.Enter:
                     {
-                        goto default;
+                        if (item != null)
+                        {
+                            if (!item.HasSubMenu)
+                            {
+                                Click(item);
+                            }
+                            else
+                            {
+                                Open(item, true);
+                            }
+
+                            e.Handled = true;
+                        }
+                        break;
                     }
-                    break;
-                }
 
-                case Key.Enter:
-                {
-                    if (item != null)
+                case Key.Escape:
                     {
-                        if (!item.HasSubMenu)
+                        if (item?.Parent is IMenuElement parent)
                         {
-                            Click(item);
+                            parent.Close();
+                            parent.Focus();
                         }
                         else
                         {
-                            Open(item, true);
+                            Menu!.Close();
                         }
 
                         e.Handled = true;
+                        break;
                     }
-                    break;
-                }
-
-                case Key.Escape:
-                {
-                    if (item?.Parent is IMenuElement parent)
-                    {
-                        parent.Close();
-                        parent.Focus();
-                    }
-                    else
-                    {
-                        Menu!.Close();
-                    }
-
-                    e.Handled = true;
-                    break;
-                }
 
                 default:
-                {
-                    var direction = e.Key.ToNavigationDirection();
-
-                    if (direction?.IsDirectional() == true)
                     {
-                        if (item == null && _isContextMenu)
+                        var direction = e.Key.ToNavigationDirection();
+
+                        if (direction?.IsDirectional() == true)
                         {
-                            if (Menu!.MoveSelection(direction.Value, true) == true)
+                            if (item == null && _isContextMenu)
                             {
-                                e.Handled = true;
+                                if (Menu!.MoveSelection(direction.Value, true) == true)
+                                {
+                                    e.Handled = true;
+                                }
                             }
-                        }
-                        else if (item?.Parent?.MoveSelection(direction.Value, true) == true)
-                        {
-                            // If the the parent is an IMenu which successfully moved its selection,
-                            // and the current menu is open then close the current menu and open the
-                            // new menu.
-                            if (item.IsSubMenuOpen &&
-                                item.Parent is IMenu &&
-                                item.Parent.SelectedItem is object)
+                            else if (item?.Parent?.MoveSelection(direction.Value, true) == true)
                             {
-                                item.Close();
-                                Open(item.Parent.SelectedItem, true);
+                                // If the the parent is an IMenu which successfully moved its selection,
+                                // and the current menu is open then close the current menu and open the
+                                // new menu.
+                                if (item.IsSubMenuOpen &&
+                                    item.Parent is IMenu &&
+                                    item.Parent.SelectedItem is object)
+                                {
+                                    item.Close();
+                                    Open(item.Parent.SelectedItem, true);
+                                }
+                                e.Handled = true;
                             }
-                            e.Handled = true;
                         }
-                    }
 
-                    break;
-                }
+                        break;
+                    }
             }
 
             if (!e.Handled && item?.Parent is IMenuItem parentItem)
@@ -275,7 +275,7 @@ namespace Avalonia.Controls.Platform
                 return;
             }
 
-            if (item.HasSubMenu)
+            if (item.HasSubMenu && item.IsEnabled)
             {
                 Open(item, true);
             }
@@ -441,7 +441,7 @@ namespace Avalonia.Controls.Platform
         {
             Menu?.Close();
         }
-        
+
         private void TopLevelLostPlatformFocus()
         {
             Menu?.Close();