Hi all! Is it possible to consume the scroll delta...

# compose

[Ilias Zosimadis]

Hi all! Is it possible to consume the scroll delta offset of a LazyRow? I think I can't just use the ScrollableController modifier.

[Julien Salvi]

Check the LazyScrollState attribute of the Composable ;)

[Ilias Zosimadis]

You mean the LazyListState? In this case, the onScroll function is internal and we don't have access to the consumed distance. Also the firstVisibleItemScrollOffset is the offset of the first item.

[Shakil Karim]

You can use firstVisibleItemScrollOffset for getting offset like this

val collapseRange = with(AmbientDensity.current) { (TopItemHeight).toPx() }
val collapseFraction =
    (scrollState.firstVisibleItemScrollOffset / collapseRange).coerceIn(0f, 1f)

[Shakil Karim]

But you have to check if Item is first one because it reset after each item scrollState.firstVisibleItemIndex > 0

[Ilias Zosimadis]

Yes, I made a similar solution with firstVisibleItemScrollOffset but I think it would be much simpler if we had access to the onScroll function.

[Julien Salvi]

Yep I was thinking the solution as Shakil because unfortunately there is no global scroll offset available for LazyRow or LazyColumn