[PowerToys Run] Keyboard shows command tooltips (#12720)

* [PowerToys Run] Keyboard shows command tooltips

* Fix spellchecker error

* Another try at fixing the spellcheck error

src/modules/launcher/PowerLauncher/ResultList.xaml

@@ -176,6 +176,7 @@
             ScrollViewer.VerticalScrollBarVisibility="Auto"       
             SelectionMode="Single"
             SelectedIndex="{Binding Results.SelectedIndex, Mode=TwoWay}"
+            SelectionChanged="SuggestionsListView_SelectionChanged"
             ItemContainerStyle="{StaticResource ResultsListViewItemContainerStyle}"
             AutomationProperties.Name="{x:Static p:Resources.Results}">
             
@@ -208,7 +209,7 @@
                             <RowDefinition Height="*"/>
                         </Grid.RowDefinitions>
                         <Grid.ToolTip>
-                            <ToolTip Visibility="{Binding Result.ToolTipVisibility}">
+                            <ToolTip Visibility="{Binding Result.ToolTipVisibility}" Opened="ToolTip_Opened">
                                 <StackPanel>
                                     <TextBlock 
                                         Style="{DynamicResource CollapsableTextblock}"
@@ -270,6 +271,7 @@
                             SelectionMode="Single"
                             Margin="0,0,-8,0"
                             SelectedIndex="{Binding ContextMenuSelectedIndex}"
+                            SelectionChanged="ContextMenuListView_SelectionChanged"
                             Visibility="{Binding AreContextButtonsActive, Converter={StaticResource BooleanToVisibilityConverter}}"
                             ItemContainerStyle="{StaticResource CommandButtonListViewItemContainerStyle}">
                             <ItemsControl.ItemsPanel>
@@ -288,9 +290,10 @@
                                         VerticalAlignment="Center"
                                         Height="42"
                                         Width="42"
+                                        Name="commandButton"
                                         BorderThickness="1" >
                                         <ToolTipService.ToolTip>
-                                            <ToolTip >
+                                            <ToolTip Opened="ToolTip_Opened">
                                                 <TextBlock
                                                     AutomationProperties.Name="{x:Static p:Resources.ContextMenuItemAdditionalInformation}"
                                                     Text="{Binding Title}"/>

src/modules/launcher/PowerLauncher/ResultList.xaml.cs

@@ -2,7 +2,9 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Media;
 
 namespace PowerLauncher
 {
@@ -15,5 +17,73 @@ namespace PowerLauncher
         {
             InitializeComponent();
         }
+
+        private ToolTip _previouslyOpenedToolTip;
+
+        // From https://docs.microsoft.com/en-us/dotnet/desktop/wpf/data/how-to-find-datatemplate-generated-elements
+        private TypeChildItem FindVisualChild<TypeChildItem>(DependencyObject obj)
+    where TypeChildItem : DependencyObject
+        {
+            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
+            {
+                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
+                if (child != null && child is TypeChildItem)
+                {
+                    return (TypeChildItem)child;
+                }
+                else
+                {
+                    TypeChildItem childOfChild = FindVisualChild<TypeChildItem>(child);
+                    if (childOfChild != null)
+                    {
+                        return childOfChild;
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        private void HideCurrentToolTip()
+        {
+            if (_previouslyOpenedToolTip != null)
+            {
+                _previouslyOpenedToolTip.IsOpen = false;
+            }
+        }
+
+        private void ContextMenuListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            var listView = sender as ListView;
+            if (listView.SelectedItem != null)
+            {
+                ListBoxItem listBoxItem = (ListBoxItem)listView.ItemContainerGenerator.ContainerFromItem(listView.SelectedItem);
+                ContentPresenter contentPresenter = FindVisualChild<ContentPresenter>(listBoxItem);
+                DataTemplate dataTemplate = contentPresenter.ContentTemplate;
+                Button button = (Button)dataTemplate.FindName("commandButton", contentPresenter);
+                ToolTip tooltip = button.ToolTip as ToolTip;
+                tooltip.PlacementTarget = button;
+                tooltip.Placement = System.Windows.Controls.Primitives.PlacementMode.Right;
+                tooltip.PlacementRectangle = new Rect(0, button.Height, 0, 0);
+                tooltip.IsOpen = true;
+            }
+        }
+
+        private void ToolTip_Opened(object sender, RoutedEventArgs e)
+        {
+            if (string.Equals(sender.GetType().FullName, "System.Windows.Controls.ToolTip", System.StringComparison.InvariantCulture))
+            {
+                HideCurrentToolTip();
+                _previouslyOpenedToolTip = (ToolTip)sender;
+            }
+        }
+
+        private void SuggestionsListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            if (string.Equals(((ListView)e.OriginalSource).Name, "SuggestionsList", System.StringComparison.InvariantCulture))
+            {
+                HideCurrentToolTip();
+            }
+        }
     }
 }