I'm using `SnapshotStateList<SnapshotStateList&...

# compose

[Se7eN]

I'm using SnapshotStateList<SnapshotStateList<MyObject>> as a state but when I change it, the composables aren't getting recomposed. However, if I wrap it with a mutable state MutableState<SnapshotStateList<SnapshotStateList<MyObject>> it's working fine. Is this intended?

data class MyStateHolder(
    val name: MutableState<String>,
    val list: SnapshotStateList<SnapshotStateList<MyObject>>
)

var state = remember { MyStateHolder(...) }
...
MyComposable(onSomeEvent = { newList -> state = state.copy(list = newList) })
SomeOtherComposable(state.list) // not getting recomposed when I change state with a new list

I'm not sure but I think it works fine if I just change an item of the list as opposed to copying the whole state for a new list.
This works fine:

data class MyStateHolder(
    val name: MutableState<String>,
    val list: MutableState<SnapshotStateList<SnapshotStateList<MyObject>>>
)

val state = remember { MyStateHolder(...) }
...
MyComposable(onSomeEvent = { newList -> state.list = newList })
SomeOtherComposable(state.list)

[Dominaezzz]

Looking at your code, I don't think you need SnapshotStateList . Just use List and String ,

[Dominaezzz]

Recomposition will only happen when a State object changes.

[Se7eN]

I didn't include the whole code but I'd like to do state.list[i][j] = something too so I need the SnapshotStateList

[Dominaezzz]

Oh, in that case just do the latter code snippet.

[Se7eN]

Okay thanks!