NavView Hamburger btn and header overlap on launch in minimal mode

dev/NavigationView/NavigationView.cpp

@@ -2586,6 +2586,7 @@ void NavigationView::OnPropertyChanged(const winrt::DependencyPropertyChangedEve
     if (property == s_IsPaneOpenProperty)
     {
         OnIsPaneOpenChanged();
+        UpdateVisualStateForDisplayModeGroup(DisplayMode());
     }
     else if (property == s_CompactModeThresholdWidthProperty ||
         property == s_ExpandedModeThresholdWidthProperty)

dev/NavigationView/NavigationView_InteractionTests/NavigationViewTests.cs

@@ -3803,6 +3803,28 @@ public void EnsureDisplayModeGroupUpdatesWhenBackButtonVisibilityChanged()
             }
         }
 
+        [TestMethod]
+        [TestProperty("NavViewTestSuite", "D")]
+        public void EnsureDisplayModeGroupUpdatesOnPaneClosedToMinimalWithBackButton()
+        {
+            using (var setup = new TestSetupHelper(new[] { "NavigationView Tests", "Navigation Minimal Test" }))
+            {
+                Log.Comment("Click on ToggleButton");
+                Button navButton = new Button(FindElement.ById("TogglePaneButton"));
+                navButton.Invoke();
+                Wait.ForIdle();
+
+                Log.Comment("Get NavView Active VisualStates");
+                var getNavViewActiveVisualStatesButton = new Button(FindElement.ByName("GetNavViewActiveVisualStates"));
+                getNavViewActiveVisualStatesButton.Invoke();
+                Wait.ForIdle();
+
+                const string visualStateName = "MinimalWithBackButton";
+                var result = new TextBlock(FindElement.ByName("NavViewActiveVisualStatesResult"));
+                Verify.IsTrue(result.GetText().Contains(visualStateName), "Active VisualStates should not include " + visualStateName);
+            }
+        }
+
         // Test for issue 450 https://github.com/Microsoft/microsoft-ui-xaml/issues/450
         [TestMethod]
         [TestProperty("NavViewTestSuite", "D")]

dev/NavigationView/TestUI/NavigationViewCaseBundle.xaml

@@ -24,6 +24,7 @@
             <Button x:Name="NavigateToTopNavPage" AutomationProperties.Name="Top Nav Test" Margin="2" HorizontalAlignment="Stretch">Top Nav Test</Button>
             <Button x:Name="NavigateToAnimationPage" AutomationProperties.Name="Navigation Animation Test" Margin="2" HorizontalAlignment="Stretch">Navigation Animation Test</Button>
             <Button x:Name="NavigateToIsPaneOpenPage" AutomationProperties.Name="Navigation IsPaneOpen Test" Margin="2" HorizontalAlignment="Stretch">Navigation IsPaneOpen Test</Button>
+            <Button x:Name="NavigateToMinimalPage" AutomationProperties.Name="Navigation Minimal Test" Margin="2" HorizontalAlignment="Stretch">Navigation Minimal Test</Button>
         </StackPanel>
     </Grid>
 </local:TestPage>

dev/NavigationView/TestUI/NavigationViewCaseBundle.xaml.cs

@@ -32,6 +32,7 @@ public NavigationViewCaseBundle()
             NavigateToTopNavPage.Click += delegate { Frame.NavigateWithoutAnimation(typeof(NavigationViewTopNavStorePage), 0); };
             NavigateToAnimationPage.Click += delegate { Frame.NavigateWithoutAnimation(typeof(NavigationViewAnimationPage), 0); };
             NavigateToIsPaneOpenPage.Click += delegate { Frame.NavigateWithoutAnimation(typeof(NavigationViewIsPaneOpenPage), 0); };
+            NavigateToMinimalPage.Click += delegate { Frame.NavigateWithoutAnimation(typeof(NavigationViewMinimalPage), 0); };
         }
 
     }

dev/NavigationView/TestUI/NavigationViewMinimalPage.xaml

@@ -0,0 +1,26 @@
+<!-- Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT License. See LICENSE in the project root for license information. -->
+<local:TestPage
+    x:Class="MUXControlsTestApp.NavigationViewMinimalPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:MUXControlsTestApp"
+    xmlns:muxcontrols="using:Microsoft.UI.Xaml.Controls"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+
+    <Grid>
+        <muxcontrols:NavigationView x:Name="NavView" AutomationProperties.Name="NavView" AutomationProperties.AutomationId="NavView"
+                                    IsBackEnabled="True" Header="Minimal Test Page" PaneDisplayMode="LeftMinimal">
+            <muxcontrols:NavigationView.MenuItems>
+                <muxcontrols:NavigationViewItem x:Name="HomeItem" Content="Home" Icon="Home"/>
+                <muxcontrols:NavigationViewItem x:Name="AppsItem" Content="Apps" Icon="Shop" />
+            </muxcontrols:NavigationView.MenuItems>
+            <StackPanel>
+                <TextBlock x:Name="NavViewActiveVisualStatesResult" AutomationProperties.Name="NavViewActiveVisualStatesResult"/>
+                <Button x:Name="GetNavViewActiveVisualStates" AutomationProperties.Name="GetNavViewActiveVisualStates" Content="GetNavViewActiveVisualStates" Click="GetNavViewActiveVisualStates_Click"/>
+            </StackPanel>
+        </muxcontrols:NavigationView>
+    </Grid>
+</local:TestPage>

dev/NavigationView/TestUI/NavigationViewMinimalPage.xaml.cs

@@ -0,0 +1,20 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See LICENSE in the project root for license information.
+using Windows.UI.Xaml;
+
+namespace MUXControlsTestApp
+{
+    public sealed partial class NavigationViewMinimalPage : TestPage
+    {
+        public NavigationViewMinimalPage()
+        {
+            this.InitializeComponent();
+        }
+
+        private void GetNavViewActiveVisualStates_Click(object sender, RoutedEventArgs e)
+        {
+            var visualstates = Utilities.VisualStateHelper.GetCurrentVisualStateName(NavView);
+            NavViewActiveVisualStatesResult.Text = string.Join(",", visualstates);
+        }
+    }
+}

dev/NavigationView/TestUI/NavigationView_TestUI.projitems

@@ -26,6 +26,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="$(MSBuildThisFileDirectory)NavigationViewMinimalPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="$(MSBuildThisFileDirectory)NavigationViewStretchPage.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -84,6 +88,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)NavigationViewIsPaneOpenPage.xaml.cs">
       <DependentUpon>NavigationViewIsPaneOpenPage.xaml</DependentUpon>
     </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)NavigationViewMinimalPage.xaml.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)NavigationViewStretchPage.xaml.cs">
       <DependentUpon>NavigationViewStretchPage.xaml</DependentUpon>
     </Compile>
@@ -118,4 +123,9 @@
       <DependentUpon>NavigationViewTopNavStorePage.xaml</DependentUpon>
     </Compile>
   </ItemGroup>
+  <ItemGroup>
+    <Compile Update="D:\microsoft-ui-xaml\dev\NavigationView\TestUI\NavigationViewMinimalPage.xaml.cs">
+      <DependentUpon>NavigationViewMinimalPage.xaml</DependentUpon>
+    </Compile>
+  </ItemGroup>
 </Project>