How to send one shot event to NavigableCircuitContent screen?

[vulpeszerda]

When using NavigbaleCircuitContent,
there’s a scenario where navigation to a specific screen with a one-shot event argument is required (such as a focus target).

In this case I could pass argument within screen model like below.

data class ScreenA(val focusTarget:String? = null)

However, if user already in that screen,
how can we re-deliver the new argument to pre-exisiting presenter or ui, without simply popping and pushing the screen with the new argument?

I previously mentioned this in #1169,

1. Page have to load some data for initialize.
2. Page shows child content A from initialized data
3. When user click notification, then page should show content B from initialized data

The data for initialize is not needed to load every user's notification click.
Therefore, initialize data should be retained.

However, the main focus of the discussion at that time was different, so I’m raising this issue again.

[vulpeszerda]

As I kept thinking about this issue,
it occurred to me that the Circuit framework may not have been designed to handle one-shot events directly within the screen model.

If that’s the case, could you provide guidance on a general approach for delivering one-shot events to screen inside NavigableCircuitContent?

[ZacSweers]

Sorry I've read your initial post a few times and I don't really understand what your goal is. It would help if you made a more practical example rather than this abstract one?

[vulpeszerda]

Thank you for answer.

What I’m trying to build is as follows:

ProductListScreen displays multiple products using a LazyColumn.
Users can enter the ProductListScreen via a Notification or a deeplink, and at that time, the LazyColumn should focus on a specific product ID.

The ProductListScreen is displayed inside a NavigableCircuitContent, and it may or may not already exist in the backstack.

If the ProductListScreen exists in the backstack, I want to pop the backstack up to the ProductListScreen and then focus on the specific product ID.