Remove code that removed focus visual in SelectionFollowsFocus mode (#3190)

* Remove code that removed focus visual in SelectionFollowsFocus mode

* Remove unused func

Author: marcelwgn

dev/NavigationView/NavigationView.cpp

@@ -664,7 +664,6 @@ void NavigationView::OnApplyTemplate()
     UpdatePaneTabFocusNavigation();
     UpdateBackAndCloseButtonsVisibility();
     UpdateSingleSelectionFollowsFocusTemplateSetting();
-    UpdateNavigationViewUseSystemVisual();
     UpdatePaneVisibility();
     UpdateVisualState();
     UpdatePaneTitleMargins();
@@ -1185,11 +1184,6 @@ void NavigationView::OnRepeaterElementPrepared(const winrt::ItemsRepeater& ir, c
             }();
             winrt::get_self<NavigationViewItem>(nvi)->PropagateDepthToChildren(childDepth);
 
-            if (ir != m_topNavRepeaterOverflowView.get())
-            {
-                nvibImpl->UseSystemFocusVisuals(ShouldShowFocusVisual());
-            }
-
             // Register for item events
             auto nviRevokers = winrt::make_self<NavigationViewItemRevokers>();
             nviRevokers->tappedRevoker = nvi.Tapped(winrt::auto_revoke, { this, &NavigationView::OnNavigationViewItemTapped });
@@ -3165,45 +3159,6 @@ void NavigationView::UpdateLeftNavigationOnlyVisualState(bool useTransitions)
     winrt::VisualStateManager::GoToState(*this, isToggleButtonVisible ? L"TogglePaneButtonVisible" : L"TogglePaneButtonCollapsed", false /*useTransitions*/);
 }
 
-void NavigationView::UpdateNavigationViewUseSystemVisual()
-{
-    if (SharedHelpers::IsRS1OrHigher() && !ShouldPreserveNavigationViewRS4Behavior() && m_appliedTemplate)
-    {
-        PropagateShowFocusVisualToAllNavigationViewItemsInRepeater(m_leftNavRepeater.get(), ShouldShowFocusVisual());
-        PropagateShowFocusVisualToAllNavigationViewItemsInRepeater(m_leftNavFooterMenuRepeater.get(), ShouldShowFocusVisual());
-        PropagateShowFocusVisualToAllNavigationViewItemsInRepeater(m_topNavRepeater.get(), ShouldShowFocusVisual());
-        PropagateShowFocusVisualToAllNavigationViewItemsInRepeater(m_topNavFooterMenuRepeater.get(), ShouldShowFocusVisual());
-    }
-}
-
-bool NavigationView::ShouldShowFocusVisual()
-{
-    return SelectionFollowsFocus() == winrt::NavigationViewSelectionFollowsFocus::Disabled;
-}
-
-void NavigationView::PropagateShowFocusVisualToAllNavigationViewItemsInRepeater(winrt::ItemsRepeater const& ir, bool showFocusVisual)
-{
-    if (ir)
-    {
-        if (auto itemsSourceView = ir.ItemsSourceView())
-        {
-            const auto numberOfItems = itemsSourceView.Count();
-            for (int i = 0; i < numberOfItems; i++)
-            {
-                if (auto nvib = ir.TryGetElement(i))
-                {
-                    if (auto nvi = nvib.try_as<winrt::NavigationViewItem>())
-                    {
-                        auto nviImpl = winrt::get_self<NavigationViewItem>(nvi);
-                        nviImpl->UseSystemFocusVisuals(showFocusVisual);
-                    }
-                }
-
-            }
-        }
-    }
-}
-
 void NavigationView::InvalidateTopNavPrimaryLayout()
 {
     if (m_appliedTemplate && IsTopNavigationView())
@@ -3793,7 +3748,6 @@ void NavigationView::OnPropertyChanged(const winrt::DependencyPropertyChangedEve
     else if (property == s_SelectionFollowsFocusProperty)
     {
         UpdateSingleSelectionFollowsFocusTemplateSetting();
-        UpdateNavigationViewUseSystemVisual();
     }
     else if (property == s_IsPaneToggleButtonVisibleProperty)
     {

dev/NavigationView/NavigationView.h

@@ -166,8 +166,6 @@ class NavigationView :
     void UpdateVisualState(bool useTransitions = false);
     void UpdateVisualStateForOverflowButton();
     void UpdateLeftNavigationOnlyVisualState(bool useTransitions);
-    void UpdateNavigationViewUseSystemVisual();
-    static void PropagateShowFocusVisualToAllNavigationViewItemsInRepeater(winrt::ItemsRepeater const& ir, bool showFocusVisual);
     void UpdatePaneShadow();
     void UpdateNavigationViewItemsFactory();
     void SyncItemTemplates();
@@ -321,7 +319,6 @@ class NavigationView :
     bool ShouldPreserveNavigationViewRS3Behavior();
 
     bool NeedRearrangeOfTopElementsAfterOverflowSelectionChanged(int selectedOriginalIndex);
-    bool ShouldShowFocusVisual();
     void KeyboardFocusFirstItemFromItem(const winrt::NavigationViewItemBase& nvib);
     void KeyboardFocusLastItemFromItem(const winrt::NavigationViewItemBase& nvib);
     void FocusNextDownItem(const winrt::NavigationViewItem& nvi, const winrt::KeyRoutedEventArgs& args);

dev/NavigationView/NavigationView.xaml

@@ -508,10 +508,6 @@
         </Setter>
     </Style>
 
-    <!--Note: Even though UseSystemFocusVisuals is set to True here in the Style, and because
-    bindings in Styles are only evaluated once, we were unable to bring a TemplateSettings.UseSystemFocusVisuals
-    to handle the removal of the focus rect when SelectionFollowsFocus is enabled. Therefore, that has
-    been done in code and it's updated whenever SelectionFollowsFocus is changed.-->
     <Style TargetType="local:NavigationViewItem">
         <Setter Property="Foreground" Value="{ThemeResource NavigationViewItemForeground}" />
         <Setter Property="Background" Value="{ThemeResource NavigationViewItemBackground}" />