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@Composable | |
fun <T : Any> AutoScrollingLazyRow( | |
list: List<T>, | |
modifier: Modifier = Modifier, | |
scrollDx: Float = SCROLL_DX, | |
delayBetweenScrollMs: Long = DELAY_BETWEEN_SCROLL_MS, | |
divider: @Composable () -> Unit = { Spacer(modifier = Modifier.width(Dimens.grid_1)) }, | |
itemContent: @Composable (item: T) -> Unit, | |
) { | |
var itemsListState by remember { mutableStateOf(list) } | |
val lazyListState = rememberLazyListState() | |
LazyRow( | |
state = lazyListState, | |
modifier = modifier, | |
) { | |
items(itemsListState) { | |
itemContent(item = it) | |
divider() | |
if (it == itemsListState.last()) { | |
val currentList = itemsListState | |
val secondPart = currentList.subList(0, lazyListState.firstVisibleItemIndex) | |
val firstPart = currentList.subList(lazyListState.firstVisibleItemIndex, currentList.size) | |
rememberCoroutineScope().launch { | |
lazyListState.scrollToItem(0, maxOf(0, lazyListState.firstVisibleItemScrollOffset - scrollDx.toInt())) | |
} | |
itemsListState = firstPart + secondPart | |
} | |
} | |
} | |
LaunchedEffect(Unit) { | |
autoScroll(lazyListState, scrollDx, delayBetweenScrollMs) | |
} | |
} | |
private tailrec suspend fun autoScroll( | |
lazyListState: LazyListState, | |
scrollDx: Float, | |
delayBetweenScrollMs: Long, | |
) { | |
lazyListState.scroll(MutatePriority.PreventUserInput) { | |
scrollBy(scrollDx) | |
} | |
delay(delayBetweenScrollMs) | |
autoScroll(lazyListState, scrollDx, delayBetweenScrollMs) | |
} | |
private const val DELAY_BETWEEN_SCROLL_MS = 8L | |
private const val SCROLL_DX = 1f |
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AutoScrollingLazyRow(list = featuresList) { | |
FeatureTile(feature = it) | |
} |
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