PullToRefreshState

PullToRefreshLinearProgressIndicatorSample

@OptIn(ExperimentalMaterial3Api::class)
@Composable
@Preview
fun PullToRefreshLinearProgressIndicatorSample() {
    var itemCount by remember { mutableIntStateOf(15) }
    var isRefreshing by remember { mutableStateOf(false) }
    val state = rememberPullToRefreshState()
    val coroutineScope = rememberCoroutineScope()
    val onRefresh: () -> Unit = {
        isRefreshing = true
        coroutineScope.launch {
            // fetch something
            delay(5000)
            itemCount += 5
            isRefreshing = false
        }
    }
    Scaffold(
        modifier =
            Modifier.pullToRefresh(
                state = state,
                isRefreshing = isRefreshing,
                onRefresh = onRefresh,
            ),
        topBar = {
            TopAppBar(
                title = { Text("TopAppBar") },
                // Provide an accessible alternative to trigger refresh.
                actions = {
                    IconButton(onClick = onRefresh) {
                        Icon(Icons.Filled.Refresh, "Trigger Refresh")
                    }
                },
            )
        },
    ) {
        Box(Modifier.padding(it)) {
            LazyColumn(Modifier.fillMaxSize()) {
                if (!isRefreshing) {
                    items(itemCount) { ListItem({ Text(text = "Item ${itemCount - it}") }) }
                }
            }
            if (isRefreshing) {
                LinearProgressIndicator(modifier = Modifier.fillMaxWidth())
            } else {
                LinearProgressIndicator(
                    modifier = Modifier.fillMaxWidth(),
                    progress = { state.distanceFraction },
                )
            }
        }
    }
}