Feature: Added support for opening the breadcrumb dropdown via keyboard navigation (#16092)

Author: el-ev

src/Files.App/UserControls/PathBreadcrumb.xaml

@@ -89,7 +89,8 @@
 						Background="Transparent"
 						BorderBrush="Transparent"
 						CornerRadius="0,4,4,0"
-						DataContextChanged="PathItemSeparator_DataContextChanged">
+						DataContextChanged="PathItemSeparator_DataContextChanged"
+						IsTabStop="False">
 						<Button.Flyout>
 							<MenuFlyout
 								x:Name="ExpandMenuFlyout"
@@ -133,6 +134,7 @@
 		IsItemClickEnabled="True"
 		ItemTemplateSelector="{StaticResource PathBreadcrumbItemSelector}"
 		ItemsSource="{x:Bind ViewModel.PathComponents, Mode=OneWay}"
+		KeyDown="PathBoxItem_KeyDown"
 		ScrollViewer.HorizontalScrollBarVisibility="Hidden"
 		ScrollViewer.HorizontalScrollMode="Enabled"
 		ScrollViewer.VerticalScrollBarVisibility="Disabled"

src/Files.App/UserControls/PathBreadcrumb.xaml.cs

@@ -49,5 +49,10 @@ private void PathBoxItem_PointerPressed(object sender, PointerRoutedEventArgs e)
 		{
 			ViewModel.PathBoxItem_PointerPressed(sender, e);
 		}
+
+		private void PathBoxItem_KeyDown(object sender, KeyRoutedEventArgs e)
+		{
+			ViewModel.PathBoxItem_KeyDown(sender, e);
+		}
 	}
 }

src/Files.App/ViewModels/UserControls/AddressToolbarViewModel.cs

@@ -537,6 +537,17 @@ await MainWindow.Instance.DispatcherQueue.EnqueueOrInvokeAsync(async () =>
 			});
 		}
 
+		public void PathBoxItem_KeyDown(object sender, KeyRoutedEventArgs e)
+		{
+			if (e.Key == Windows.System.VirtualKey.Down)
+			{
+				var item = e.OriginalSource as ListViewItem;
+				var button = item?.FindDescendant<Button>();
+				button?.Flyout.ShowAt(button);
+				e.Handled = true;
+			}
+		}
+
 		public void OpenCommandPalette()
 		{
 			PathText = ">";