You can test this PR using the following package version. 11.2.999-cibuild0052154-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

Thanks! Could you please add unit tests?

We already got ScrollIntoView_Correctly_Scrolls_Down_To_A_Page_Of_[Smaller/Larger]_Items for the vertical orientation, that can be used as a base for the horizontal ones.

Thanks! Could you please add unit tests?

We already got ScrollIntoView_Correctly_Scrolls_Down_To_A_Page_Of_[Smaller/Larger]_Items for the vertical orientation, that can be used as a base for the horizontal ones.

Ok, I'll have a look tomorrow.

You can test this PR using the following package version. 11.2.999-cibuild0052188-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

Thank you for adding the tests!
The failures seem to be caused by target.Orientation not being set in CreateUnrootedTarget().

Thank you for adding the tests! The failures seem to be caused by target.Orientation not being set in CreateUnrootedTarget().

Thank you for the clue. I tried to set the SV Template after changing the scroll Orientation, but that do not work better.

Unfortunatly, I have errors building the Avalonia project, so I cannot debug the Tests.

Thank you for the clue. I tried to set the SV Template after changing the scroll Orientation, but that do not work better.

Oh, it seems to only miss a target.Orientation = orientation (target being the VirtualizingStackPanel), sorry if that wasn't clear.

Unfortunatly, I have errors building the Avalonia project, so I cannot debug the Tests.

Ensure that the submodules are up-to-date with git submodule update --init --recursive