calculatePan

fun PointerEvent.calculatePan(): Offset

Returns the change in the centroid location between the previous and the current pointers that are down. Pointers that are newly down or raised are not considered in the centroid movement.

Example Usage:

Code Examples

CalculatePan

@Composable
fun CalculatePan() {
    val offsetX = remember { mutableStateOf(0f) }
    val offsetY = remember { mutableStateOf(0f) }
    Box(
        Modifier.offset { IntOffset(offsetX.value.roundToInt(), offsetY.value.roundToInt()) }
            .graphicsLayer()
            .background(Color.Blue)
            .pointerInput(Unit) {
                awaitEachGesture {
                    awaitFirstDown()
                    do {
                        val event = awaitPointerEvent()
                        val offset = event.calculatePan()
                        offsetX.value += offset.x
                        offsetY.value += offset.y
                    } while (event.changes.any { it.pressed })
                }
            }
            .fillMaxSize()
    )
}