detectDragGestures

DetectDragGesturesSample

@Composable
@Sampled
fun DetectDragGesturesSample() {
    val offsetX = remember { mutableStateOf(0f) }
    val offsetY = remember { mutableStateOf(0f) }
    var size by remember { mutableStateOf(Size.Zero) }
    Box(Modifier.fillMaxSize().onSizeChanged { size = it.toSize() }) {
        Box(
            Modifier.offset { IntOffset(offsetX.value.roundToInt(), offsetY.value.roundToInt()) }
                .size(50.dp)
                .background(Color.Blue)
                .pointerInput(Unit) {
                    detectDragGestures { _, dragAmount ->
                        val original = Offset(offsetX.value, offsetY.value)
                        val summed = original + dragAmount
                        val newValue =
                            Offset(
                                x = summed.x.coerceIn(0f, size.width - 50.dp.toPx()),
                                y = summed.y.coerceIn(0f, size.height - 50.dp.toPx()),
                            )
                        offsetX.value = newValue.x
                        offsetY.value = newValue.y
                    }
                }
        )
    }
}