pointerInput dragAmount

Prerequisites:

dragAmount

dragAmount跟draggable一樣,都是拖曳的「差距」,不同的是,dragAmount有提供x軸、y軸,不用像draggable需要指定orientation是水平或垂直。

dragAmount.x
dragAmount.y

完整程式碼:

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@Composable
fun PointInputExample1() {
  var offsetX by remember { mutableStateOf(0f) }
  Column {
    Box(
      modifier = Modifier
        .size(100.dp)
        .offset { IntOffset(offsetX.roundToInt(), 0) }
        // background() 一定要放在offset之後
        .background(Color.Blue)
        .pointerInput(Unit) {
          detectDragGestures { change, dragAmount ->
            offsetX += dragAmount.x
          }
        }
    )
  }
}

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