[Windows] Fix for IndicatorView using templated icons not working

src/Controls/tests/TestCases.HostApp/Issues/Issue7144.cs

@@ -0,0 +1,78 @@
+using System.Collections.ObjectModel;
+
+namespace Controls.TestCases.HostApp.Issues;
+
+[Issue(IssueTracker.Github, 7144, "IndicatorView using templated icons not working", PlatformAffected.UWP)]
+public class Issue7144 : ContentPage
+{
+	ObservableCollection<string> Items { get; set; } = new ObservableCollection<string>() { "Item1", "Item2" };
+
+	public Issue7144()
+	{
+		Grid grid = new Grid();
+		grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Star });
+		grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
+		grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
+
+		IndicatorView indicatorViewWithDataTemplate = new IndicatorView
+		{
+			Margin = new Thickness(0, 0, 0, 40),
+			HorizontalOptions = LayoutOptions.Center,
+			IndicatorColor = Colors.Black,
+			SelectedIndicatorColor = Colors.Green
+		};
+
+		indicatorViewWithDataTemplate.IndicatorTemplate = new DataTemplate(() =>
+		{
+			Image image = new Image()
+			{
+				Source = "dotnet_bot.png",
+				HeightRequest = 15,
+				WidthRequest = 15,
+			};
+			return image;
+		});
+
+		CarouselView carouselView = new CarouselView
+		{
+			ItemsSource = Items,
+			Loop = false,
+			IndicatorView = indicatorViewWithDataTemplate,
+			ItemTemplate = new DataTemplate(() =>
+			{
+				StackLayout stackLayout = new StackLayout();
+
+				Label label = new Label
+				{
+					FontAttributes = FontAttributes.Bold,
+					FontSize = 24,
+					HorizontalOptions = LayoutOptions.Center,
+					VerticalOptions = LayoutOptions.Center
+				};
+				label.SetBinding(Label.TextProperty, ".");;
+
+				stackLayout.Children.Add(label);
+
+				return stackLayout;
+			})
+		};
+
+		Label label = new Label
+		{
+			AutomationId = "descriptionLabel",
+			Text = "The test case fails if the IndicatorView DataTemplate is not displayed",
+			FontAttributes = FontAttributes.Bold,
+			FontSize = 24,
+			HorizontalOptions = LayoutOptions.Center,
+			VerticalOptions = LayoutOptions.Center
+		};
+
+		grid.Add(carouselView, 0, 0);
+		grid.Add(indicatorViewWithDataTemplate, 0, 1);
+		grid.Add(label, 0, 2);
+
+		Content = grid;
+	}
+}
+
+

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue7144.cs

@@ -0,0 +1,22 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue7144 : _IssuesUITest
+{
+	public Issue7144(TestDevice device) : base(device)
+	{
+	}
+
+	public override string Issue => "IndicatorView using templated icons not working";
+
+	[Test]
+	[Category(UITestCategories.IndicatorView)]
+	public void IndicatorViewWithTemplatedIcon()
+	{
+		App.WaitForElement("descriptionLabel");
+		VerifyScreenshot();
+	}
+}

src/Core/src/Platform/Windows/MauiPageControl.cs

@@ -20,6 +20,8 @@ public class MauiPageControl : ItemsControl
 		WBrush? _fillColor;
 		ObservableCollection<WShape>? _dots;
 
+		internal bool UseShapeIndicator => _indicatorView == null || (_indicatorView is ITemplatedIndicatorView templatedView && templatedView.IndicatorsLayoutOverride != null);
+
 		public MauiPageControl()
 		{
 			HorizontalAlignment = Microsoft.UI.Xaml.HorizontalAlignment.Center;
@@ -35,15 +37,17 @@ public void SetIndicatorView(IIndicatorView indicatorView)
 		}
 
 		internal void UpdateIndicatorsColor()
-		{
-			if (_indicatorView == null)
+		{	
+			if (UseShapeIndicator)
+			{
 				return;
+			}
 
-			if (_indicatorView.IndicatorColor is SolidPaint solidPaint)
+			if (_indicatorView?.IndicatorColor is SolidPaint solidPaint)
 				_fillColor = solidPaint?.ToPlatform();
-			if (_indicatorView.SelectedIndicatorColor is SolidPaint selectedSolidPaint)
+			if (_indicatorView?.SelectedIndicatorColor is SolidPaint selectedSolidPaint)
 				_selectedColor = selectedSolidPaint.ToPlatform();
-			var position = _indicatorView.Position;
+			var position = _indicatorView?.Position;
 			int i = 0;
 			foreach (var item in Items)
 			{
@@ -54,13 +58,15 @@ internal void UpdateIndicatorsColor()
 
 		internal void CreateIndicators()
 		{
-			if (_indicatorView == null)
+			if (UseShapeIndicator)
+			{
 				return;
+			}
 
 			var position = GetIndexFromPosition();
 			var indicators = new List<WShape>();
 
-			var indicatorCount = _indicatorView.GetMaximumVisible();
+			var indicatorCount = _indicatorView?.GetMaximumVisible();
 			if (indicatorCount > 0)
 			{
 				for (int i = 0; i < indicatorCount; i++)