swipeable

SwipeableSample

@Composable
@OptIn(ExperimentalMaterialApi::class)
fun SwipeableSample() {
    // Draw a slider-like composable consisting of a red square moving along a
    // black background, with three states: "A" (min), "B" (middle), and "C" (max).
    val width = 350.dp
    val squareSize = 50.dp
    val swipeableState = rememberSwipeableState("A")
    val sizePx = with(LocalDensity.current) { (width - squareSize).toPx() }
    val anchors = mapOf(0f to "A", sizePx / 2 to "B", sizePx to "C")
    Box(
        modifier =
            Modifier.width(width)
                .swipeable(
                    state = swipeableState,
                    anchors = anchors,
                    thresholds = { _, _ -> FractionalThreshold(0.5f) },
                    orientation = Orientation.Horizontal,
                )
                .background(Color.Black)
    ) {
        Box(
            Modifier.offset { IntOffset(swipeableState.offset.value.roundToInt(), 0) }
                .size(squareSize)
                .background(Color.Red),
            contentAlignment = Alignment.Center,
        ) {
            Text(swipeableState.currentValue, color = Color.White, fontSize = 24.sp)
        }
    }
}