What is the right way to get a callback when a

ModalBottomSheetLayout

is dismissed, either from accessibility actions or from tapping on the scrim outside the sheet? Drop a

DisposableEffect

inside the sheet’s content? I don’t see any sort of callback or observable state.

Yeah, I ran into the same issue with

swipeable()

in my dev challenge. I used a

LaunchedEffect

: https://github.com/dandc87/Compose-Challenge-Puppies/blob/de067d272b4c7c41df6c4856[…]7123/app/src/main/java/com/dandc87/fetch/SwipeableCardLayout.kt

I like the LaunchedEfffect approach- that would support getting a callback for half expanded and fully expanded states as well. Both that and DisposableEffect feel a little weird, but that might just be me getting used to the declarative UI paradigm

the closure of the ModalSheet is an event you can observe. If you want to trigger a side effect when happens (which is why you are reaching out for a callback probably, right?) you can do it via DisposableEffect or LaunchedEffect, if you need a scope:

val state = rememberModalBottomsheetState(BottmsheetValue.Expanded)
DisposableEffect(state.isClosed) {
    //this is called when state.isClosed changed during last composition, so you can trigger a side effect when you want (true or false)
    onDispose { /* cleanup here */}
}

ModalBottomSheetLayout(state, ....)

Thanks! A side effect is exactly what I’m thinking, for example sending analytics events.

So this tools will suit your case perfectly then 🙂