What the idiomatic way of playing an `animation th...

# compose

[ursus]

What the idiomatic way of playing an animation that is a result of a event?

Think of hitting a button and exploding confetti.

(So not a function of a state - like changing alpha to a certain value and staying there)

[Chrimaeon]

Check how https://github.com/DanielMartinus/Konfetti is implemented

[Chrimaeon]

So https://developer.android.com/reference/kotlin/androidx/compose/animation/core/package-summary#withInfiniteAnimationFrameMillis(kotlin.Function1) is what you are looking for.

[Zach Klippenstein (he/him) [MOD]]

More generally, launching a coroutine and running an animation. Whether that’s with Animatable.animateTo, the lower-level animate function, or completely from scratch with frame callbacks like Christian suggested (just be aware of MotionDurationScale in that case).

[ursus]

but it has to be inside a Launched effected keyed by the event?

[Zach Klippenstein (he/him) [MOD]]

No, use rememberCoroutineScope to get a CoroutineScope and then in your event handler call launch on that.

[ursus]

I see

say its isPlaying bool state which gets toggled and I want to play the vector morph animation of the icon in the button based on that , is that when I'd use LaunchedEffect(isPlaying) ?

[Zach Klippenstein (he/him) [MOD]]

In general if you want to run some coroutine work when a state changes better to use a long-running LaunchedEffect with snapshotFlow.