The problem with intrinsic size is that currently is not supported for SubcomposeLayout. So is there...

# compose

[Ilias Zosimadis]

The problem with intrinsic size is that currently is not supported for SubcomposeLayout. So is there any other way to match the height of the Divider with the ComposableX?

[Alex Bieliaiev]

My guess is that ConstraintLayout might help in that situation

[Alex Bieliaiev]

You might try to link Divider's top and bottom anchors to the top and bottom of ComposableX

[Ilias Zosimadis]

I believe that this only centers the divider around the ComposambleX, keeping the size fixed. What I want is to find the height of the parent before the divider's composition. Also, the row is inside a lazyColumn which measures each child with infinite max height constrain (because it allows a child to be as big as it wants) meaning that you can't just apply fillMaxHeight modifier.

[Jan Bína]

Well, the ConstraintLayout is definitely an option, you would use height = Dimension.fillToConstraints in your constrainAs block so it's not only centered.
If your usecase is really that simple, I would just use modifier for ComposableX , something like this:

Modifier.drawBehind {
    drawLine(
        color = Color.Black,
        start = Offset(0F, 0F),
        end = Offset(0F, size.height),
        strokeWidth = 1.dp.toPx()
    )
}

[Ilias Zosimadis]

Yeah my bad, I forgot about the fillToConstraints. I also found a solution using a SubcomposeLayout which can be used to measure the size of a child composable and use it on the composition of a second child. I guess the ContraintLayout is the best solution but I am not sure yet. My use case is not just a Divider and a Composable so I can't use the drawBehind modifier.