Cheers. I’m having issues with the newly introduced `onFirstVisible` modifier and hoping to get some...

# compose

[Carl Zeitler]

Cheers. I’m having issues with the newly introduced onFirstVisible modifier and hoping to get some input.

When displaying `Row`s with horizontalScroll within a Column with verticalScroll, vertical scrolls are never considered for triggering the onFirstVisble callbacks. Horizontal scrolling still invokes the callbacks when applicable. This only happens if a Row is initially considered to be in the viewport (e.g. the Row is the first item in the Column), otherwise, both scrolling directions work properly with onFirstVisible.

Unfortunately I’ve tried to isolate this behavior in a demo project but wasn’t able to. Therefore I’m asking if anyone has an idea of what the underlying issue could be.

[Andrey Kulikov]

hey! I am from Compose team and I am working on some bug fixes for this modifier right now. we did fix some of known issues already, would you be able to test if you can still reproduce this issue with 1.10.0-alpha03? if yes, then there are a few more fixes we already have after this alpha, so I might ask you to try to reproduce it on a snapshot version of compose

[Carl Zeitler]

Hey! I just tried it with 1.10.0-alpha03 and the behavior is the same. Would be great if you could provide me with the snapshot version. In the meantime, I will try to provide a minimal reproducible scenario.

[Andrey Kulikov]

thanks for verifying. the next candidate was merged in the build 14093950. you can read more on how to use snapshots here https://androidx.dev/

[Carl Zeitler]

Hey! Unfortunately the behavior remained unchanged with the snapshot. I was able to reproduce it in a demo project, I created an issue and attached a sample project/ sample code: https://issuetracker.google.com/issues/445356774

[Andrey Kulikov]

thanks, I will look into that

[Carl Zeitler]

Thanks for fixing this so fast, greatly appreciated!

[Andrey Kulikov]

The fix was released in 1.9.3 as well