Fix ClearButtonVisibility and VerticalTextAlignment issues with invis…

…ible Entry on Windows (#13769)

src/Core/src/Handlers/Entry/EntryHandler.Windows.cs

@@ -34,12 +34,12 @@ protected override void ConnectHandler(TextBox platformView)
 		{
 			platformView.KeyUp += OnPlatformKeyUp;
 			platformView.TextChanged += OnPlatformTextChanged;
-			platformView.Loaded += OnPlatformLoaded;
+			platformView.SizeChanged += OnPlatformViewSizeChanged;
 		}
 
 		protected override void DisconnectHandler(TextBox platformView)
 		{
-			platformView.Loaded -= OnPlatformLoaded;
+			platformView.SizeChanged -= OnPlatformViewSizeChanged;
 			platformView.KeyUp -= OnPlatformKeyUp;
 			platformView.TextChanged -= OnPlatformTextChanged;
 
@@ -139,8 +139,8 @@ void OnPlatformSelectionChanged(object sender, RoutedEventArgs e)
 			if (VirtualView.SelectionLength != selectedTextLength)
 				VirtualView.SelectionLength = selectedTextLength;
 		}
-
-		void OnPlatformLoaded(object sender, RoutedEventArgs e) =>
+		
+		void OnPlatformViewSizeChanged(object sender, SizeChangedEventArgs e) =>
 			MauiTextBox.InvalidateAttachedProperties(PlatformView);
 	}
 }

src/Core/tests/DeviceTests/Handlers/Entry/EntryHandlerTests.Windows.cs

@@ -4,6 +4,8 @@
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Handlers;
 using Microsoft.Maui.Platform;
+using Microsoft.UI.Xaml.Automation.Peers;
+using Microsoft.UI.Xaml.Automation.Provider;
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.UI.Xaml.Input;
 using Microsoft.UI.Xaml.Media;
@@ -16,6 +18,56 @@ namespace Microsoft.Maui.DeviceTests
 {
 	public partial class EntryHandlerTests
 	{
+		[Theory(DisplayName = "VerticalTextAlignment Works Correctly with hidden Entry")]
+		[InlineData(TextAlignment.Start)]
+		[InlineData(TextAlignment.Center)]
+		[InlineData(TextAlignment.End)]
+		public async Task VerticalTextAlignmentWorksCorrectlyWithHiddenEntry(TextAlignment textAlignment)
+		{			
+			var layout = new LayoutStub();
+
+			var entry = new EntryStub
+			{
+				Text = "Test",
+				Visibility = Visibility.Collapsed,
+				VerticalTextAlignment = textAlignment,
+			};
+
+			var button = new ButtonStub
+			{
+				Text = "Change TextAlignment"
+			};
+
+			layout.Add(entry);
+			layout.Add(button);
+
+			var clicked = false;
+
+			button.Clicked += delegate
+			{
+				entry.Visibility = Visibility.Visible;
+				clicked = true;
+			};
+
+			await PerformClick(button);
+
+			Assert.True(clicked);
+
+			var platformAlignment = GetNativeVerticalTextAlignment(textAlignment);
+
+			// Attach for windows because it uses control templates
+			var values = await GetValueAsync(entry, (handler) =>
+				handler.PlatformView.AttachAndRun(() =>
+					new
+					{
+						ViewValue = entry.VerticalTextAlignment,
+						PlatformViewValue = GetNativeVerticalTextAlignment(handler)
+					}));
+
+			Assert.Equal(textAlignment, values.ViewValue);
+			Assert.Equal(platformAlignment, values.PlatformViewValue);
+		}
+
 		[Theory(DisplayName = "MaxLength Works Correctly")]
 		[InlineData("123")]
 		[InlineData("Hello")]
@@ -121,5 +173,19 @@ int GetNativeCursorPosition(EntryHandler entryHandler) =>
 
 		int GetNativeSelectionLength(EntryHandler entryHandler) =>
 			GetNativeEntry(entryHandler).SelectionLength;
+
+		Button GetNativeButton(ButtonHandler buttonHandler) =>
+			buttonHandler.PlatformView;
+
+		Task PerformClick(IButton button)
+		{
+			return InvokeOnMainThreadAsync(() =>
+			{
+				var platformButton = GetNativeButton(CreateHandler<ButtonHandler>(button));
+				var ap = new ButtonAutomationPeer(platformButton);
+				var ip = ap.GetPattern(PatternInterface.Invoke) as IInvokeProvider;
+				ip?.Invoke();
+			});
+		}
 	}
 }