Prevents the user interface from shifting upwards at launch

src/Calculator/Views/TitleBar.xaml

@@ -12,8 +12,7 @@
           Height="32"
           HorizontalAlignment="Stretch">
         <Grid x:Name="BackgroundElement"
-              Background="Transparent"
+              Background="Transparent">
-              Height="32">
             <VisualStateManager.VisualStateGroups>
                 <VisualStateGroup x:Name="WindowFocusStates">
                     <VisualState x:Name="WindowFocused"/>
@@ -31,7 +30,6 @@
                    VerticalAlignment="Center"
                    Foreground="{ThemeResource TitleBarForegroundBaseHighBrush}"
                    FontSize="12"
-                   TextAlignment="Left"
                    TextTrimming="CharacterEllipsis"
                    Visibility="{x:Bind ApplicationViewModel.IsAlwaysOnTop, Converter={StaticResource BooleanToVisibilityNegationConverter}, Mode=OneWay}"/>
         </Grid>

src/Calculator/Views/TitleBar.xaml.cpp

@@ -11,6 +11,7 @@ using namespace Platform;
 using namespace Windows::ApplicationModel;
 using namespace Windows::ApplicationModel::Core;
 using namespace Windows::Foundation;
+using namespace Windows::System::Profile;
 using namespace Windows::UI;
 using namespace Windows::UI::Core;
 using namespace Windows::UI::ViewManagement;
@@ -45,13 +46,13 @@ namespace CalculatorApp
 
     void TitleBar::OnLoaded(_In_ Object ^ /*sender*/, _In_ RoutedEventArgs ^ /*e*/)
     {
+        auto that(this);
         // Register events
         m_visibilityChangedToken = m_coreTitleBar->IsVisibleChanged += ref new TypedEventHandler<CoreApplicationViewTitleBar ^, Object ^>(
-            [this](CoreApplicationViewTitleBar ^ cTitleBar, Object ^) { this->SetTitleBarVisibility(); });
+            [that](CoreApplicationViewTitleBar ^ cTitleBar, Object ^) { that->SetTitleBarVisibility(false); });
         m_layoutChangedToken = m_coreTitleBar->LayoutMetricsChanged +=
-            ref new TypedEventHandler<CoreApplicationViewTitleBar ^, Object ^>([this](CoreApplicationViewTitleBar ^ cTitleBar, Object ^) {
+            ref new TypedEventHandler<CoreApplicationViewTitleBar ^, Object ^>([that](CoreApplicationViewTitleBar ^ cTitleBar, Object ^) {
-                this->LayoutRoot->Height = cTitleBar->Height;
+                that->SetTitleBarHeightAndPadding();
-                this->SetTitleBarPadding();
             });
 
         m_colorValuesChangedToken = m_uiSettings->ColorValuesChanged += ref new TypedEventHandler<UISettings ^, Object ^>(this, &TitleBar::ColorValuesChanged);
@@ -60,11 +61,15 @@ namespace CalculatorApp
         m_windowActivatedToken = Window::Current->Activated +=
             ref new Windows::UI::Xaml::WindowActivatedEventHandler(this, &CalculatorApp::TitleBar::OnWindowActivated);
         // Set properties
-        LayoutRoot->Height = m_coreTitleBar->Height;
         SetTitleBarControlColors();
+        SetTitleBarHeightAndPadding();
 
-        SetTitleBarVisibility();
+        // As of Windows 10 1903: when an app runs on a PC (without Tablet mode activated)
-        SetTitleBarPadding();
+        // properties of CoreApplicationViewTitleBar aren't initialized during the first seconds after launch.
+        auto forceDisplay = AnalyticsInfo::VersionInfo->DeviceFamily == L"Windows.Desktop"
+                            && UIViewSettings::GetForCurrentView()->UserInteractionMode == UserInteractionMode::Mouse;
+
+        SetTitleBarVisibility(forceDisplay);
     }
 
     void TitleBar::OnUnloaded(_In_ Object ^ /*sender*/, _In_ RoutedEventArgs ^ /*e*/)
@@ -82,14 +87,20 @@ namespace CalculatorApp
         m_windowActivatedToken.Value = 0;
     }
 
-
+    void TitleBar::SetTitleBarVisibility(bool forceDisplay)
-    void TitleBar::SetTitleBarVisibility()
     {
-        this->LayoutRoot->Visibility = m_coreTitleBar->IsVisible || ApplicationViewModel->IsAlwaysOnTop ? ::Visibility::Visible : ::Visibility::Collapsed;
+        this->LayoutRoot->Visibility =
+            forceDisplay || m_coreTitleBar->IsVisible || ApplicationViewModel->IsAlwaysOnTop ? ::Visibility::Visible : ::Visibility::Collapsed;
     }
 
-    void TitleBar::SetTitleBarPadding()
+    void TitleBar::SetTitleBarHeightAndPadding()
     {
+        if (m_coreTitleBar->Height == 0)
+        {
+            // The titlebar isn't init
+            return;
+        }
+
         double leftAddition = 0;
         double rightAddition = 0;
 
@@ -105,11 +116,13 @@ namespace CalculatorApp
         }
 
         this->LayoutRoot->Padding = Thickness(leftAddition, 0, rightAddition, 0);
+        this->LayoutRoot->Height = m_coreTitleBar->Height;
     }
 
     void TitleBar::ColorValuesChanged(_In_ UISettings ^ /*sender*/, _In_ Object ^ /*e*/)
     {
-        Dispatcher->RunAsync(CoreDispatcherPriority::Normal, ref new DispatchedHandler([this]() { SetTitleBarControlColors(); }));
+        auto that(this);
+        Dispatcher->RunAsync(CoreDispatcherPriority::Normal, ref new DispatchedHandler([that]() { that->SetTitleBarControlColors(); }));
     }
 
     void TitleBar::SetTitleBarControlColors()
@@ -161,9 +174,10 @@ namespace CalculatorApp
 
     void TitleBar::OnHighContrastChanged(_In_ AccessibilitySettings ^ /*sender*/, _In_ Object ^ /*args*/)
     {
-        Dispatcher->RunAsync(CoreDispatcherPriority::Normal, ref new DispatchedHandler([this]() {
+        auto that(this);
-                                 SetTitleBarControlColors();
+        Dispatcher->RunAsync(CoreDispatcherPriority::Normal, ref new DispatchedHandler([that]() {
-                                 SetTitleBarVisibility();
+                                 that->SetTitleBarControlColors();
+                                 that->SetTitleBarVisibility(false);
                              }));
     }
 

src/Calculator/Views/TitleBar.xaml.h

@@ -26,9 +26,8 @@ public
         void OnLoaded(_In_ Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
         void OnUnloaded(_In_ Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
 
-        void SetTitleBarText(Platform::String ^ text);
+        void SetTitleBarVisibility(bool forceDisplay);
-        void SetTitleBarVisibility();
+        void SetTitleBarHeightAndPadding();
-        void SetTitleBarPadding();
         void SetTitleBarControlColors();
         void ColorValuesChanged(_In_ Windows::UI::ViewManagement::UISettings ^ sender, _In_ Platform::Object ^ e);
         void OnHighContrastChanged(Windows::UI::ViewManagement::AccessibilitySettings ^ sender, Platform::Object ^ args);