Why is nesting `ScrollableColumn`s not allowed? My use case: I’m making my own

TextField

component, and it internally needs a

ScrollableColumn

so that users can scroll when the text height is greater than the container size. Having an internal

ScrollableColumn

prevents me from putting this

TextField

in a screen with scrollable content (i.e. most screens)

Nesting of

ScrollableColumn

is allowed and supported as far as I'm aware. The problem you see arising because ScrollableColumn measures its children with infinite constraints, so you have to limit your child

ScrollableColumn

to some height it order for it to work. Having said that, putting

ScrollableColumn

in

TextField

to scroll might solve your issue short term, but it's more complicated than that. You need to be able to scroll when cursor is dragged, you need to be able to auto-scroll down or up when line is added/removed, that's why we embed scrolling logic inside TextField. Since it's not a trivial task, in the upcoming releases we will port this logic to the

BasicTextField

as well, so any TextField you use will have this logic build-in, not only material 🙂 Let me know if you have any questions

Ah ok, this explains a lot, thank you for the in-depth reply! This is also fantastic news: porting it over to

BasicTextField

solves my main concern of having to maintain this code myself. Is there a public issue I can follow or anything? 👀

Here's the CL and there are two bugs linked in the commit message https://android-review.googlesource.com/c/platform/frameworks/support/+/1394667