If I have a suspend function that I want to call on a button click event what's the best way to do t...

# compose-desktop

[andrewreitz]

If I have a suspend function that I want to call on a button click event what's the best way to do that?
Example

Button(
   onClick = { runit() }
) {
  Text("Run")
}

Where runit is the suspend function. I can put it in a runBlocking, but that locks up the whole UI and seems incorrect in this situation.

[jim]

I suppose it depends why runit() is a suspending function, but yeah, if it's a potentially slow function, you should probably launch it into a new thread or coroutine scope. https://kotlinlang.org/docs/reference/coroutines/basics.html

[andrewreitz]

What scope would launch come off of?

fun main = Window() { }

Is there a scope build for the window already?

[jim]

Depends on what you're trying to do. Typically, for most actions, I'd imagine you'd want an application scope or to use GlobalScope since you typically don't want the action to suddenly die if the user switches tabs or the widget is otherwise removed from the hierarchy.

[andrewreitz]

runBlocking just uses global scope right? So I could maybe do runBlocking { Window() { ... } } then I should be able to use launch and async inside the window block? Seems like it might be nice if window had a context even if it was just global.