I have a LazyColumn with custom keys Now after i r...

# compose

[Vaibhav Jaiswal]

I have a LazyColumn with custom keys
Now after i refresh the PagingData using LazyPagingitems.refresh() , the scroll state is maintained
How can i scroll to top if new items are added in top ??
I am not doing backward pagination (prepend)

[Alex]

Just modify the scroll state on receiving new data, you can use a LaunchedEffect to watch the data and trigger a scroll

[Vaibhav Jaiswal]

Do you mean observing the refresh LoadState and scrolling to top?

[Vaibhav Jaiswal]

Wont that mess up scroll state when navigating back to this screen

[Alex]

Well, you have to decide on conditions when you should scroll to top (after refresh that brings new data) and check for those

[Alex]

That won’t mess up scroll state on navigating back

[Vaibhav Jaiswal]

no way to check If refresh call brought new data

[Vaibhav Jaiswal]

On returning back LaunchedEffect will run again, all states reset and hence it will lose scroll state

[Mahmoo]

Use LaunchedEffect with loadState.refresh as key

when loadState.refresh is true then scroll to the top of the list

[Vaibhav Jaiswal]

@Mahmoo if I navigate to some other screen and come back
LaunchedEffect will run again, loadState.refresh is still NotLoading in that case and hence it will lose scroll state

[Alex]

A super simple way would be to store the current item count in a rememberSaveable and only scroll if the itemcount increased. I’m not saying this is the solution you should take, a way better way would be to put the scroll top logic into the viewmodel and expose a flow to trigger the scrolling. Just pointing out ways to achieve this.

[Alex]

We can huddle and you can show me the code

[Mahmoo]

https://stackoverflow.com/a/71123229

See if saving list state helps in your case