Comments (5)
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")
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Very strange that I'm seeing no indication (warning, error, log output) indicating this.
from compose-multiplatform.
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
from compose-multiplatform.
Rechecked what's going on here.
Compose for Desktop doesn't emit lifecycle events
It does. Even without this extra dependency. You can receive it via:
lifecycle.addObserver(object : LifecycleEventObserver {
override fun onStateChanged(source: LifecycleOwner, event: Lifecycle.Event) {
println("New Event: $event")
}
})
Very strange that I'm seeing no indication (warning, error, log output) indicating this.
It looks like behavior of flowOn
function + missed Dispatchers.Main
. Example:
flowOf(1, 2, 3)
.flowOn(Dispatchers.Main.immediate)
.collect {
println("collect: $it")
}
Will print nothing and hang on collect
function without any exceptions. I guess it is out of the scope of Compose Multiplatfrom repo, but maybe worth creating YT issue for coroutines library.
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Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.
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