UI not updating GridItemsLayout when Span becomes 1

[Natriss]

Description

When you set the SizeChanged event of the CollectionView to change the Span of the GridItemsLayout when the CollectionView becomes to small. The UI won't render it properly. This only happens when you go to Span 1. Other values work just fine.

I'm using the latest version of .NET 9 Release and Visual Studio 2022 Preview 17.13.0.

https://github.com/user-attachments/assets/9d2c8394-ddee-472e-97e3-f021013bc5ca

https://github.com/user-attachments/assets/ad6cbe52-edfc-4cd0-ba44-7898641f2cdd

Steps to Reproduce

1. Create a new MAUI app
2. Add a CollectionView and add the SizeChanged event in the Code-Behind.
3. Ad the following code to the event: ```csharp private void RecipeList_SizeChanged(object? sender, EventArgs e) { CollectionView collectionView = sender as CollectionView; GridItemsLayout gridItemsLayout = (GridItemsLayout)collectionView.ItemsLayout; if (collectionView.Width < 1000) { gridItemsLayout.Span = 1; } else { gridItemsLayout.Span = 2; } }

4. Add the following code to the CollectionView in xaml: ```xml ```

Link to public reproduction project repository

https://github.com/Natriss/GridItemsLayoutSpanIssue

Version with bug

9.0.10 SR1

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

Windows 10.0.19041.0

Did you find any workaround?

No response

Relevant log output

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[Ying-6]

This issue has been verified using Visual Studio 17.13 Preview 1(9.0.10 & 9.0.0 & 8.0.100). Can repro this issue on Windows platform.

[BagavathiPerumal]

@Natriss, We were unable to fully understand the issue described in your report. Based on the description, it appears you are experiencing a problem where, upon resizing the CollectionView, the span value of the GridItemsLayout changes from 1 to 2, causing the items within the CollectionView to not occupy the full width of the screen. However, we were unable to reproduce this exact issue on our end.

We suspect the issue might involve a scenario where, when the span value is set to 1, the right-side border of the CollectionView item is rendered correctly, but the items inside the CollectionView are not resizing as expected. For clarity, we have attached a video that demonstrates our findings.

Could you please confirm the exact issue you are facing.

https://github.com/user-attachments/assets/9daf60c7-f300-4980-9507-eb54c49c3e25

[Natriss]

@BagavathiPerumal well that video is the issue you're showing. It's indeed not rendering properly on that right side.

I might have not properly described it. I wasn't sure how to describe it. Feel free to update the title that fits better. :3