OneHandedGestureScrollIndicator

OneHandedGestureTransformingLazyColumnSample

@Composable
fun OneHandedGestureTransformingLazyColumnSample() {
    val backDispatcherOwner = LocalOnBackPressedDispatcherOwner.current
    val onClick =
        remember<() -> Unit> { { backDispatcherOwner?.onBackPressedDispatcher?.onBackPressed() } }
    val tlcState = rememberTransformingLazyColumnState()
    var scrollGestureIndicatorVisible by remember { mutableStateOf(false) }
    val interactionSource = remember { MutableInteractionSource() }
    ScreenScaffold(
        scrollState = tlcState,
        edgeButton = {
            var buttonGestureIndicatorVisible by remember { mutableStateOf(false) }
            EdgeButton(
                onClick = onClick,
                interactionSource = interactionSource,
                modifier =
                    if (tlcState.canScrollForward) {
                        Modifier
                    } else {
                        // Apply the one-handed gesture modifier only when the container cannot
                        // scroll further, ensuring the EdgeButton is fully visible and interactive
                        Modifier.oneHandedGesture(
                            action = GestureAction.Primary,
                            priority = GesturePriority.Clickable,
                            interactionSource = interactionSource,
                            onShowIndicator = { buttonGestureIndicatorVisible = true },
                            onGesture = onClick,
                        )
                    } then
                        Modifier.scrollable(
                            tlcState,
                            orientation = Orientation.Vertical,
                            reverseDirection = true,
                            overscrollEffect = rememberOverscrollEffect(),
                        ),
            ) {
                OneHandedGestureIndicator(
                    buttonGestureIndicatorVisible,
                    { buttonGestureIndicatorVisible = false },
                ) {
                    Text("Close")
                }
            }
        },
        scrollIndicator = {
            OneHandedGestureScrollIndicator(
                scrollGestureIndicatorVisible,
                onGestureIndicatorFinished = { scrollGestureIndicatorVisible = false },
                tlcState,
                modifier = Modifier.align(Alignment.CenterEnd),
            )
        },
    ) { contentPadding ->
        TransformingLazyColumn(
            state = tlcState,
            contentPadding = contentPadding,
            modifier =
                Modifier.fillMaxSize()
                    .oneHandedGesture(
                        action = GestureAction.Primary,
                        priority = GesturePriority.Scrollable,
                        onGesture = { OneHandedGestureDefaults.scrollDown(tlcState) },
                        onShowIndicator = { scrollGestureIndicatorVisible = true },
                    ),
        ) {
            items(10) { Text("Item $it") }
        }
    }
}