I’m trying to get rid of MaterialTheme, but as soo...

# compose-desktop

[orangy]

I’m trying to get rid of MaterialTheme, but as soon as I remove it, I get this:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: LayoutNode@108e4651 children: 1 measurePolicy: androidx.compose.foundation.Scrollbar_desktopKt$verticalMeasurePolicy$1@7d30d0b0 is not ready. layoutState is NeedsRemeasure

Build 0.4.0-build173
Any ideas?

[jim]

Looks potentially related to https://github.com/JetBrains/compose-jb/issues/481

[orangy]

Caused by VerticalScrollbar in my case, but can’t repro easily 😞 If I remove the scroll bar, exception goes away

[Igor Demin]

You can try to disable indication. You need to wrap root Composable to this:

CompositionLocalProvider(LocalIndication provides NoIndication) {
    ...
}

Where `NoIndication`:

private object NoIndication : Indication {
    private object NoIndicationInstance : IndicationInstance {
        override fun ContentDrawScope.drawIndication() {
            drawContent()
        }
    }

    @Composable
    override fun rememberUpdatedInstance(interactionSource: InteractionSource): IndicationInstance {
        return NoIndicationInstance
    }
}

[orangy]

@Igor Demin I will try, thanks. Shouldn’t DesktopTheme set this up too?

[Igor Demin]

DesktopTheme extends MaterialTheme, it defines style for desktop-only components like scrollbars, so it shouldn't override indication.

P.S. We haven't yet figured out how styling should work on desktop, behavior can change in the future

[orangy]

@Igor Demin thanks, providing no indication helps with exception!

[orangy]

There is DesktopMaterialTheme and DesktopTheme , so the latter don’t extend material theme

[orangy]

Also, is it possible to split desktop and desktop-material, so I can get rid of androidx.compose.material package? I’m building my own theme, and would like to avoid depending on material stuff.

[Igor Demin]

the latter don’t extend material theme

I mean purpose of DesktopTheme is to "extend" styles defined in the other common themes like MaterialTheme, not "override" them.

Also, is it possible to split desktop and desktop-material, so I can get rid of androidx.compose.material package? I’m building my own theme, and would like to avoid depending on material stuff.

Maybe we can split. I filled the issue

[Igor Demin]

so I can get rid of androidx.compose.material

For now you can exclude it explicitly:

implementation(compose.desktop.currentOs) {
    exclude(group = "org.jetbrains.compose.material")
}