Add FrameRenderer to all our existing tests and then resolve found issues

src/Controls/samples/Controls.Sample.Profiling/MainPage.xaml.cs

@@ -13,7 +13,7 @@ public MainPage()
 		}
 
 		private void OnCounterClicked(object sender, EventArgs e)
-		{
+		{			
 			count++;
 			CounterLabel.Text = $"Current count: {count}";
 		}

src/Controls/samples/Controls.Sample.Sandbox/MainPage.xaml

@@ -3,5 +3,5 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
     x:Class="Maui.Controls.Sample.MainPage"
     xmlns:local="clr-namespace:Maui.Controls.Sample">
-
+    <Frame BackgroundColor="Purple" WidthRequest="400" HeightRequest="400"></Frame>
 </ContentPage>

src/Controls/samples/Controls.Sample.Sandbox/MainPage.xaml.cs

@@ -14,5 +14,18 @@ public MainPage()
 		{
 			InitializeComponent();
 		}
+
+		protected override void OnAppearing()
+		{
+			base.OnAppearing();
+
+		}
+
+		protected override void OnNavigatedTo(NavigatedToEventArgs args)
+		{
+			base.OnNavigatedTo(args);
+
+			var activity = Window?.Handler?.PlatformView;
+		}
 	}
 }

src/Controls/samples/Controls.Sample.Sandbox/MauiProgram.cs

@@ -2,6 +2,7 @@
 using Microsoft.Maui.Controls;
 using Microsoft.Maui.Controls.Hosting;
 using Microsoft.Maui.Hosting;
+using Microsoft.Maui.LifecycleEvents;
 
 namespace Maui.Controls.Sample
 {
@@ -18,6 +19,6 @@ public static MauiApp CreateMauiApp() =>
 	class App : Application
 	{
 		protected override Window CreateWindow(IActivationState activationState) =>
-			new Window(new NavigationPage(new MainPage()));
+			new Window(new MainPage());
 	}
 }

src/Controls/samples/Controls.Sample/Pages/Compatibility/FramePage.xaml

@@ -52,6 +52,17 @@
                 <Label 
                     Text="Has Shadow" />
             </Frame>
+            <Label
+                Text="Opacity"
+                Style="{StaticResource Headline}"/>
+            <Frame
+                BackgroundColor="LightGray"
+                BorderColor="Red"
+                Opacity="0.5"
+                HasShadow="True">
+                <Label 
+                    Text="Opacity 0.5" />
+            </Frame>
             <Label
                 Text="IsClippedToBounds (False)"
                 Style="{StaticResource Headline}"/>

src/Controls/samples/Controls.Sample/Pages/Controls/BoxViewPage.xaml

@@ -67,6 +67,17 @@
                 VerticalOptions="Center"
                 HorizontalOptions="Center" />
 
+            <Label
+                Text="Using Opacity"
+                Style="{StaticResource Headline}"/>
+            <BoxView
+                Color="Orange"
+                Opacity="0.5"
+                WidthRequest="160"
+                HeightRequest="160"
+                VerticalOptions="Center"
+                HorizontalOptions="Center" />
+
         </VerticalStackLayout>
     </ScrollView>
 </views:BasePage>

src/Controls/src/Core/Compatibility/Handlers/Android/FrameRenderer.cs

@@ -6,14 +6,17 @@
 using Android.Graphics;
 using Android.Graphics.Drawables;
 using Android.Views;
+using Android.Views.Inspectors;
 using AndroidX.CardView.Widget;
 using AndroidX.Core.View;
 using Microsoft.Maui.Controls.Platform;
 using Microsoft.Maui.Graphics;
+using static Android.Icu.Text.CaseMap;
 using AColor = Android.Graphics.Color;
 using ARect = Android.Graphics.Rect;
 using AView = Android.Views.View;
 using Color = Microsoft.Maui.Graphics.Color;
+using static Microsoft.Maui.Primitives.Dimension;
 
 namespace Microsoft.Maui.Controls.Handlers.Compatibility
 {
@@ -28,7 +31,10 @@ public static IPropertyMapper<Frame, FrameRenderer> Mapper
 				[Frame.CornerRadiusProperty.PropertyName] = (h, _) => h.UpdateCornerRadius(),
 				[Frame.BorderColorProperty.PropertyName] = (h, _) => h.UpdateBorderColor(),
 				[Microsoft.Maui.Controls.Compatibility.Layout.IsClippedToBoundsProperty.PropertyName] = (h, _) => h.UpdateClippedToBounds(),
-				[Frame.ContentProperty.PropertyName] = (h, _) => h.UpdateContent()
+				[Frame.ContentProperty.PropertyName] = (h, _) => h.UpdateContent(),
+				[nameof(IView.AutomationId)] = (h, v) => ViewHandler.MapAutomationId(h, v),
+				[nameof(IView.IsEnabled)] = (h, v) => ViewHandler.MapIsEnabled(h, v),
+				[nameof(IViewHandler.ContainerView)] = MapContainerView,
 			};
 
 		public static CommandMapper<Frame, FrameRenderer> CommandMapper
@@ -50,9 +56,19 @@ public static CommandMapper<Frame, FrameRenderer> CommandMapper
 		public event EventHandler<VisualElementChangedEventArgs>? ElementChanged;
 		public event EventHandler<PropertyChangedEventArgs>? ElementPropertyChanged;
 
-		public FrameRenderer(Context context) : base(context)
+		public FrameRenderer(Context context) : this(context, Mapper)
 		{
-			_viewHandlerWrapper = new ViewHandlerDelegator<Frame>(Mapper, CommandMapper, this);
+		}
+
+		// TODO NET8 make public
+		internal FrameRenderer(Context context, IPropertyMapper mapper)
+			: this(context, mapper, CommandMapper)
+		{
+		}
+
+		internal FrameRenderer(Context context, IPropertyMapper mapper, CommandMapper commandMapper) : base(context)
+		{
+			_viewHandlerWrapper = new ViewHandlerDelegator<Frame>(mapper, commandMapper, this);
 		}
 
 		protected CardView Control => this;
@@ -71,8 +87,16 @@ protected Frame? Element
 
 		Size IViewHandler.GetDesiredSize(double widthMeasureSpec, double heightMeasureSpec)
 		{
+			double minWidth = 20;
+			if (IsExplicitSet(widthMeasureSpec) && !double.IsInfinity(widthMeasureSpec))
+				minWidth = widthMeasureSpec;
+
+			double minHeight = 20;
+			if (IsExplicitSet(widthMeasureSpec) && !double.IsInfinity(heightMeasureSpec))
+				minHeight = heightMeasureSpec;
+
 			return VisualElementRenderer<Frame>.GetDesiredSize(this, widthMeasureSpec, heightMeasureSpec,
-				new Size(20, 20));
+				new Size(minWidth, minHeight));
 		}
 
 		protected override void Dispose(bool disposing)
@@ -317,9 +341,54 @@ void UpdateContent()
 		}
 
 		#region IPlatformViewHandler
-		bool IViewHandler.HasContainer { get => false; set { } }
 
-		object? IViewHandler.ContainerView => null;
+		bool NeedsContainer
+		{
+			get
+			{
+				var virtualView = Element as IView;
+				return virtualView?.Clip != null || virtualView?.Shadow != null
+					|| (virtualView as IBorder)?.Border != null || virtualView?.InputTransparent == true;
+			}
+		}
+
+		static void MapContainerView(IViewHandler handler, IView view)
+		{
+			if (handler is FrameRenderer frameRenderer)
+			{
+				handler.HasContainer = frameRenderer.NeedsContainer;
+			}
+		}
+
+		bool _hasContainer;
+		AView? _containerView;
+		bool IViewHandler.HasContainer
+		{
+			get => _hasContainer;
+			set
+			{
+				if (_hasContainer == value)
+					return;
+
+				_hasContainer = value;
+
+				if (value)
+				{
+					this.SetupContainerFromHandler((handler) =>
+					{
+						var view = new WrapperView(handler!.MauiContext!.Context);
+						_containerView = view;
+						return view;
+					});
+				}
+				else
+				{
+					this.RemoveContainerFromHandler(_ => _containerView = null);
+				}
+			}
+		}
+
+		object? IViewHandler.ContainerView => _containerView;
 
 		IView? IViewHandler.VirtualView => Element;
 
@@ -331,7 +400,7 @@ void UpdateContent()
 
 		AView IPlatformViewHandler.PlatformView => this;
 
-		AView? IPlatformViewHandler.ContainerView => this;
+		AView? IPlatformViewHandler.ContainerView => _containerView;
 
 		void IViewHandler.PlatformArrange(Graphics.Rect rect) =>
 			this.PlatformArrangeHandler(rect);

src/Controls/src/Core/Compatibility/Handlers/VisualElementRenderer.cs

@@ -252,14 +252,18 @@ internal static void SetVirtualView(
 
 			_ = view ?? throw new ArgumentNullException(nameof(view));
 
-			if (oldElement?.Handler != null)
-				oldElement.Handler = null;
-
 			currentVirtualView = (TElement)view;
 
 			if (currentVirtualView.Handler != nativeViewHandler)
 				currentVirtualView.Handler = nativeViewHandler;
 
+			// We set the previous virtual view to null after setting it on the incoming virtual view.
+			// This makes it easier for the incoming virtual view to have influence
+			// on how the exchange of handlers happens.
+			// We will just set the handler to null ourselves as a last resort cleanup
+			if (oldElement?.Handler != null)
+				oldElement.Handler = null;
+
 			_mapper = _defaultMapper;
 
 			if (currentVirtualView is IPropertyMapperView imv)

src/Controls/src/Core/Compatibility/Handlers/Windows/FrameRenderer.cs

@@ -18,7 +18,19 @@ public static IPropertyMapper<Frame, FrameRenderer> Mapper
 		public static CommandMapper<Frame, FrameRenderer> CommandMapper
 			= new CommandMapper<Frame, FrameRenderer>(VisualElementRendererCommandMapper);
 
-		public FrameRenderer() : base(Mapper, CommandMapper)
+		public FrameRenderer() : this(Mapper, CommandMapper)
+		{
+			AutoPackage = false;
+		}      
+
+		// TODO NET8 make public
+		internal FrameRenderer(IPropertyMapper mapper)
+			: this( mapper, CommandMapper)
+		{
+		}
+
+		// TODO NET8 make public
+		internal FrameRenderer(IPropertyMapper mapper, CommandMapper commandMapper) : base(mapper, commandMapper)
 		{
 			AutoPackage = false;
 		}
@@ -70,17 +82,19 @@ void UpdatePadding()
 		{
 			Control.Arrange(new WRect(0, 0, finalSize.Width, finalSize.Height));
 			if (Element is IContentView cv)
-				cv.CrossPlatformArrange(new Rect(0, 0, finalSize.Width, finalSize.Height));
+			{
+				finalSize = cv.CrossPlatformArrange(new Rect(0, 0, finalSize.Width, finalSize.Height)).ToPlatform();
+			}
 
-			return finalSize;
+			return new global::Windows.Foundation.Size(Math.Max(0, finalSize.Width), Math.Max(0, finalSize.Height));
 		}
 
 		protected override global::Windows.Foundation.Size MeasureOverride(global::Windows.Foundation.Size availableSize)
 		{
 			var size = base.MeasureOverride(availableSize);
 
 			if (Element is IContentView cv)
-				size = cv.CrossPlatformMeasure(availableSize.Width, availableSize.Height).ToPlatform();
+				_ = cv.CrossPlatformMeasure(size.Width, size.Height);
 
 			return size;
 		}

src/Controls/src/Core/Compatibility/Handlers/Windows/VisualElementRenderer.cs

@@ -89,7 +89,7 @@ protected override WSize MeasureOverride(global::Windows.Foundation.Size availab
 			{
 				if (child is Maui.IElement childElement && childElement.Handler is IPlatformViewHandler nvh)
 				{
-					var size = nvh.GetDesiredSizeFromHandler(availableSize.Width, availableSize.Height);
+					var size = nvh.GetDesiredSizeFromHandler(width, height);
 					height = Math.Max(height, size.Height);
 					width = Math.Max(width, size.Width);
 				}

src/Controls/src/Core/Compatibility/Handlers/iOS/FrameRenderer.cs

@@ -24,6 +24,18 @@ public FrameRenderer() : base(Mapper, CommandMapper)
 			AddSubview(_actualView);
 		}
 
+		// TODO NET8 make public
+		internal FrameRenderer(IPropertyMapper mapper)
+			: this(mapper, CommandMapper)
+		{
+		}
+
+		// TODO NET8 make public
+		internal FrameRenderer(IPropertyMapper mapper, CommandMapper commandMapper) : base(mapper, commandMapper)
+		{
+			AutoPackage = false;
+		}
+
 		public override void AddSubview(UIView view)
 		{
 			if (view != _actualView)