anyone tried <https://slackhq.github.io/circuit/> with Compose Multiplatform? I have issue with Scre...

# compose

[Marko Novaković]

anyone tried https://slackhq.github.io/circuit/ with Compose Multiplatform?
I have issue with Screen, Object 'MyScreen' is not abstract and does not implement abstract member public abstract fun describeContents(): Int defined in com.slack.circuit.runtime.screen.Screen .
it’s Parcelable error but there is no Parcelable in KMP world. should I expect/actual that and then use it or I’m missing something in the setup?

[Marko Novaković]

for anyone wondering and finding this later.
make you Screen interface and do

// KMP module
interface MyScreen : Screen

// Android
@Parcelize
data object AndroidMyScreen : MyScreen, Parcelable

in Android app and use this one instead.
that’s it

[youssef hachicha]

is it like an architecture for your UI ? that it?

[Marko Novaković]

can you elaborate a bit? I’m not sure if I understand this

[youssef hachicha]

honestly, I am not even sure what it is, and what exactly it does, I was just basically asking if you can elaborate more on what it does and how it could help that's my question

[agrosner]

Can’t you skip inheriting parcelable directly - the docs show you just need to implement screen. I’m guessing it’s expect actualized into parcelable in Android code?

[Marko Novaković]

I’m guessing it’s expect actualized into parcelable in Android code?

it is expext/actual but it doesn’t get inherited for some reason.
this is the only way I found plus I checked sample project, counter, and they are doing the same

[Marko Novaković]

@youssef hachicha I’m still not sure what do you mean. I’m not sure if you are or aren’t familiar with Circuit. in case you aren’t and you didn’t try to use it KMP module it won’t make much sense to you 😄

[agrosner]

Why not just do this?

// common
@Parcelize
data object MyScreen : Screen

[Marko Novaković]

because you can’t 😄, parcelable is Android concept and it’s not available in shared KMP code. there is an option to do expect/actual for annotation too

[Marko Novaković]

didn’t try with expect/actual for annotation since Circuit does that internally and it’s not working so I didn’t even wanted to try

[youssef hachicha]

i am very familiar with KMP i am just not familiar with Circuit

[agrosner]

On multi platform examples in its docs , it just leaves out the annotation lol
“it’s not working” what do you mean?

[Marko Novaković]

Parcelable doesn’t exist outside Android, it’s Android specific thing.
docs don’t “just leave annotation out”, annotation doesn’t exist in KMP world

[Josh Feinberg]

https://issuetracker.google.com/issues/315775835?pli=1#comment16