Compose LazyColumn not scrollable

[rom1v]

• scrcpy version: v1.18

Tracking issue from this StackOverflow post: https://stackoverflow.com/questions/68954790/why-is-lazycolumn-not-scrollable-using-mouse-but-recycler-view-is

I am using scrcpy to mirror and control my physical test mobile device using my desktop.

I am migrating an app from views to jetpack compose.
This is something I observed and I am curious why this happens so.

Using the desktop mouse scroll wheel, I am able to scroll a RecyclerView.

But I am not able to do so in a LazyColumn.

Note: I am able to scroll the LazyColumn using the mouse by click and drag.
Only the scroll wheel is not working.

https://stackoverflow.com/questions/68954790/why-is-lazycolumn-not-scrollable-using-mouse-but-recycler-view-is/68964204#comment121884201_68964204

I have not tried with OTG as I don't have one. In case you missed it, on the same desktop using scrcpy I am able to scroll the app when it had recycler view. The issue is when using compose LazyColumn. But I tried an alternative of scrcpy and that scrolls both recycler view and compose LazyColumn.

Minimal sample to reproduce: https://github.com/Abhimanyu14/compose-scroll

EDIT: oops, I missed the initial issue #2598. I keep this one because the discussions are there.

[rom1v]

I will try to take a look soon.

[rom1v]

@Abhimanyu14 Thank you very much for the sample, that's helpful: I reproduce the problem.

However, I didn't find a way to make it work (by changing the values passed in the MotionEvent here).

So I connected my mouse via bluetooth to the device to inject "real" scroll events (without scrcpy being involved at all), and the problem is exactly the same:

scroll.mp4

Therefore, the problem is probably with Compose.

[Abhimanyu14]

This a software similar to scrcpy.
And this scrolls both Views and Composables.

compose.mov

[rom1v]

Which software is it?

Could you create a custom view in a sample Android app and log scroll and touch events? Which events does it trigger on scrolling? (I'm pretty sure it's not scroll events, but I'm interested in what it does)

[Abhimanyu14]

Which software is it?

Could you create a custom view in a sample Android app and log scroll and touch events? Which events does it trigger on scrolling? (I'm pretty sure it's not scroll events, but I'm interested in what it does)

Software - https://www.apowersoft.com/phone-mirror