Hey folks, I have a question <https://stackoverflo...

# coroutines

[adeln]

Hey folks, I have a question https://stackoverflow.com/q/54552056/1032286
would really appreciate if someone can help me with this

[adeln]

nevermind, answered it myself

[ghedeon]

https://github.com/Kotlin/KEEP/blob/master/proposals/coroutines.md#wrapping-callbacks

[ghedeon]

the resulting coroutine can be used in .produce{} to create a channel

[adeln]

huh. Creating a coroutine per each listener trigger?

[adeln]

suspend fun View.globalLayout(): View =
    suspendCancellableCoroutine { cont ->
        val listener = ViewTreeObserver.OnGlobalLayoutListener {
            cont.resume(this)
        }

        cont.invokeOnCancellation {
            viewTreeObserver.removeOnGlobalLayoutListener(listener)
        }

        viewTreeObserver.addOnGlobalLayoutListener(listener)
    }

fun View.globalLayouts(context: CoroutineContext = Dispatchers.Unconfined): ReceiveChannel<View> =
    GlobalScope.produce(context) {
        while (true) {
            send(globalLayout())
        }
    }

?

[adeln]

*creating a new continuation per listener trigger

[adeln]

figured it out https://stackoverflow.com/a/54553450/1032286