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Have you had any issues with `Ripple` + `Clickable` not working after a lot of scrolling? Maybe just one or the other, I haven’t had time to dig into it.

do you know how facebook messenger type of chat has a gradient on the message bubble based on the message bubble's position in the list?

the adapter list has the current element, but i dont know the position in the visible list

Yea, I think they’re going to need some additional API there. You’d need that to implement stuff like sticky headers as well.

you _could_, as a workaround, encode positional information in the data, or look it up in the source data, etc.

but yes, we're definitely going to have some additional API here

also I haven't seen an app on Android do the gradient thing, but I do know what you're referring to

that's a little bit trickier, because it's not the position in the the list that matters, it's the position within the parent.  I don't think AdapterList would have any specific support for that, but I think we should probably find a way that works regardless of what sort of scrolling container you're in

yes the gradient changes based on the position of the message bubble compared to the top of the view

so it's not the position the data list, but the position in the part that's currently shown

Some sort of react-to-position support is, I think, common-ish

I'm not sure where we are on support for that, though

you could do some sort of `OnChildPositioned` thing and update the data for drawing, I think

it's a little awkward, but would probably work

device-2020-02-22-112254.webm

I just tried putting an `OnPositioned` inside of the list item, and it definitely works!

```  AdapterList(data = (1..100).toList()) { item -&gt;
    var bounds by state { "waiting for position…" }
    Stack(modifier = DrawBorder(size = 1.dp, color = Color.Red)) {
      OnPositioned(onPositioned = { coords -&gt;
        bounds = coords.boundsInRoot.toString()
      })
      ListItem(text = item.toString(), overlineText = bounds)
    }
  }```

Do you guys have this working with the ROOM ViewModelProvider?  Can I see the example? Working on it now but if you have working code, it would save me some time.  I have this in a navigation fragment.