I am trying to create scrollbar with vertically scrollable Column. scrollbarOffsetY does change but...

# compose

[chanjungskim]

I am trying to create scrollbar with vertically scrollable Column.

scrollbarOffsetY does change but I don't know why the y position offset doesn't work visually. Why is that?

https://github.com/chanjungkim/compose/blob/develop/compose/src/main/java/com/github/chanjungkim/compose/ScrollColumn.kt

[ephemient]

are you aware that https://github.com/androidx/androidx/blob/androidx-main/compose/foundation/foundat[…]topMain/kotlin/androidx/compose/foundation/Scrollbar.desktop.kt already exists?

[chanjungskim]

for desktop?

[chanjungskim]

Which library should I import?

[chanjungskim]

I am making android app though

[ephemient]

those composables are currently provided for desktop only, but they do not depend on anything desktop-specific. you can see how they work and implement something similar, or just copy them

[ephemient]

(they do depend on an internal fun detectTapAndPress(), but you can also see all the code for that, it's simple: https://github.com/androidx/androidx/blob/androidx-main/compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/gestures/TapGestureDetector.kt#L226)

[chanjungskim]

Well... it doesn't seem so.

[chanjungskim]

I need those

[chanjungskim]

I hope those are the last one.

[ephemient]

don't copy that file, just re-implement the one function

[ephemient]

or use @file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE") to ignore internal and use it anyway (as long as you're aware that doing so may break in the future)

[chanjungskim]

I have no idea..

[ephemient]

as I said: don't copy that file

[ephemient]

either re-implement that one function with public APIs (it's not that hard), or bypass visibility to import that one function only

[chanjungskim]

Okay, I fixed that.

[chanjungskim]

But it doesn't have content argument. How can I pass the content?

[ephemient]

it includes documentation on how to use it!

[ephemient]

there is no content argument because it can be used with anything scrollable, whether it is lazy or not

[chanjungskim]

Hmm. Okay, The bar finally is visible now. I think I should resize and change the behaviour..

[chanjungskim]

How can I change the height?

[chanjungskim]

just implemented without desktop scrollbar.

https://www.youtube.com/shorts/HfyB6nMHheM