Support new Compose Multiplatform Lifecycle (and maybe ViewModel)

[DatL4g]

Will this https://www.jetbrains.com/help/kotlin-multiplatform-dev/compose-lifecycle.html be integrated in any form?

[arkivanov]

Eventually might be. This is being tracked in arkivanov/Essenty#157.

[arkivanov]

Let's keep this issue open for Decompose-related discussions.

[AndrazP]

I noticed an issue with ViewModel lifecycle when an animation is set to Children stack.
If animation is set, ViewModel will be cleared on navigation pop and then immediately created again.

Example of navigating from the list to the details screen and back:

1. List viewModel init()
2. nav.push(RootConfig.Details...)
3. Details viewModel init()
4. navigation.pop()
5. Details viewModel onCleared()
6. Details viewModel init() // Issue

Example Children stack snippet:

@Composable
private fun Children(component: RootComponent, modifier: Modifier = Modifier) {
    Children(
        stack = component.stack,
        animation = stackAnimation { child, otherChild, _ ->
                slide(animationSpec = tween(easing = LinearEasing)) + fade()
        }
        modifier = modifier
    ) {
        Surface(modifier = Modifier.fillMaxSize()) {
            val child = it.instance
            CompositionLocalProvider(LocalViewModelStoreOwner provides child.viewModelStore) {
                when (child) {
                    is RootComponent.Child.List -> ListRoute(child.component)
                    is RootComponent.Child.Details -> DetailsRoute(child.component)
                    ....

KMP, Wasm only for now, Decompose 3.1, Koin 3.6.0-Beta5, Compose 1.6.11, Jetbrains Viewmodel 2.8.0
Lifecycle was configured as in Minesweeper
I don't know the state of Multiplatform ViewModel support, so I'm asking here instead of creating a separate bug.

[arkivanov]

@AndrazP that looks related to Decompose-ViewModel interop described here, not to KMP Lifecycle support. Please submit a new issue with a reproducer code/project.