LazyLayout

LazyLayoutSample

/** A Lazy Layout that will place items right to left with scrolling support. */
@Sampled
@Preview
@Composable
fun LazyLayoutSample() {
    val items = remember { (0..100).toList().map { it.toString() } }

    // Create an item provider
    val itemProvider = remember {
        {
            object : LazyLayoutItemProvider {
                override val itemCount: Int
                    get() = 100

LazyLayoutScrollableSample

/** A simple Layout that will place items right to left with scrolling support. */
@Sampled
@Preview
@Composable
fun LazyLayoutScrollableSample() {
    val items = remember { (0..100).toList().map { it.toString() } }

    /** Saves the deltas from the scroll gesture. */
    var scrollAmount by remember { mutableFloatStateOf(0f) }

    /**
     * Lazy Layout measurement starts at a known position identified by the first item's position.
     */
    var firstVisibleItemIndex by remember { mutableIntStateOf(0) }
    var firstVisibleItemOffset by remember { mutableIntStateOf(0) }

    // A scrollable state is needed for scroll support
    val scrollableState = rememberScrollableState { delta ->
        scrollAmount += delta
        delta // assume we consumed everything.
    }

    // Create an item provider
    val itemProvider = {
        object : LazyLayoutItemProvider {
            override val itemCount: Int
                get() = items.size