How to disable and enable scrolling in LazyColumn/LazyRow in Jetpack Compose?

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Since 1.2.0-alpha01 userScrollEnabled was added to LazyColumn, LazyRow, and LazyVerticalGrid

Answer for 1.1.0 and earlier versions:

@Ryan’s solution will also disable programmatically-called scrolling.

Here’s a solution proposed by a maintainer in this feature request. It’ll disable scrolling, allow programmatic scrolling as well as children view touches.

private val VerticalScrollConsumer = object : NestedScrollConnection {
    override fun onPreScroll(available: Offset, source: NestedScrollSource) = available.copy(x = 0f)
    override suspend fun onPreFling(available: Velocity) = available.copy(x = 0f)
}

private val HorizontalScrollConsumer = object : NestedScrollConnection {
    override fun onPreScroll(available: Offset, source: NestedScrollSource) = available.copy(y = 0f)
    override suspend fun onPreFling(available: Velocity) = available.copy(y = 0f)
}

fun Modifier.disabledVerticalPointerInputScroll(disabled: Boolean = true) =
    if (disabled) this.nestedScroll(VerticalScrollConsumer) else this

fun Modifier.disabledHorizontalPointerInputScroll(disabled: Boolean = true) =
    if (disabled) this.nestedScroll(HorizontalScrollConsumer) else this

Usage:

LazyColumn(
    modifier = Modifier.disabledVerticalPointerInputScroll()
) {
    // ...
}

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