Compose for Desktop doesn't emit lifecycle events, only states

[SebastianAigner]

1.6.10-rc03.

iOS:

Desktop:

Observed via:

@Composable
fun LifecycleLogger() {
    val lc = LocalLifecycleOwner.current
    LaunchedEffect(lc) {
        launch {
            lc.lifecycle.currentStateFlow.collect {
                println("New State: $it")
            }
        }
        launch {
            lc.lifecycle.eventFlow.collect {
                println("New Event: $it")
            }
        }
    }
}

[zsmb13]

Looking at the impl of eventFlow:

public val Lifecycle.eventFlow: Flow<Lifecycle.Event>
    get() = callbackFlow {
        val observer = LifecycleEventObserver { _, event ->
            trySend(event)
        }.also { addObserver(it) }

        awaitClose { removeObserver(observer) }
    }.flowOn(Dispatchers.Main.immediate)

Apparently it uses Dispatchers.Main, which is not available if you don't add coroutines-swing to the project explicitly. Adding this dependency fixes the issue:

implementation("org.jetbrains.kotlinx:kotlinx-coroutines-swing:1.8.1")

[SebastianAigner]

Very strange that I'm seeing no indication (warning, error, log output) indicating this.

[MatkovIvan]

It's expected because kotlinx-coroutines-swing is optional. I'll check why a warning message is missed + make sure that it's desired in docs