[Android] 019. プルダウンリフレッシュ(PullToRefreshBox)

@OptIn(ExperimentalMaterial3Api::class)
@Preview(showBackground = true)
@Composable
fun Screen(modifier: Modifier = Modifier) {
    var isRefreshing by remember { mutableStateOf(false) }
    val state = rememberPullToRefreshState()
    val scope = rememberCoroutineScope()

    PullToRefreshBox(
        isRefreshing,
        onRefresh = {
            isRefreshing = true
            scope.launch {
                delay(2_000)
                isRefreshing = false
            }
        },
        modifier = modifier,
        state = state,
        indicator = {
            Indicator(
                modifier = Modifier.align(Alignment.TopCenter),
                isRefreshing = isRefreshing,
                state = state,
                threshold = 100.dp
            )
        }
    ) {
        Column(
            Modifier
                .fillMaxSize()
                .verticalScroll(rememberScrollState()),
            horizontalAlignment = Alignment.CenterHorizontally
        ) {
            Text("PullToRefreshBox")
        }
    }
}