[C# Markup + MVU]: ItemsRepeater with StackLayout does not show items under net8.0-windows10.0.19041

[kucint]

Hi,

I have created a simple app (C# Markup + MVU) that uses ItemsRepeater with StackLayout.

    public MainPage() => this
        .DataContext(new BindableMainPageModel(), (page, vm) => page
        .Background(ThemeResource.Get<Brush>("ApplicationPageBackgroundThemeBrush"))
        .Content(
            new Frame()
            .Background(Colors.LightYellow)
            .Content(MyRepeater(vm))
            )
        );

    private static ItemsRepeater MyRepeater(BindableMainPageModel vm) =>
            new ItemsRepeater()
            .ItemsSource(() => vm.Items)
            .Layout(new StackLayout().Orientation(Orientation.Horizontal).Spacing(10))
            .ItemTemplate<Item>(item
                => new Rectangle()
                .Width(50)
                .Height(30)
                .Stroke(Colors.Black)
                .StrokeThickness(1)
                .RadiusX(4)
                .RadiusY(4)
                .Fill(x => x.Binding(() => item.Color))
            );

internal partial record MainPageModel
{
    public IListState<Item> Items => ListState<Item>.Value(this, () =>
    [
        new Item(){ Color = new SolidColorBrush(Colors.Wheat) },
        new Item(){ Color = new SolidColorBrush(Colors.Orange)  },
        new Item(){ Color = new SolidColorBrush(Colors.Magenta) },
    ]);
}

public class Item
{
    public Brush Color { get; set; } = new SolidColorBrush(Colors.Black);
}

This app works as expected when ran on net8.0-desktop but fails to draw elements on net8.0-windows10.0.19041.
I was thinking the issue is in winui3, that's why I created a winui3 app (XAML) that does the same; and it works as expected.

net8.0-desktop:

net8.0-windows10.0.19041

winui3

As you can see, on net8.0-windows10.0.19041 the items do not show up.

Source code for both uno and winui3 apps: UnoRepeaterApp.zip

[agneszitte]

fyi @dansiegel, @jeromelaban, @kazo0

[kazo0]

@dansiegel I think this is the same idea as the ItemsPanel for ItemsControl/ListView/GridView and will need a similar change.

[dansiegel]

@kucint I'm closing this as I believe this should be resolved by #2404/#2407. Please let me know if you're still having this issue and we can look into more.

[kucint]

ok. I will check it and let you know. thanks!