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@Composable
fun detectTransform() {
  var scale by remember { mutableStateOf(1f) }
  Box(
    modifier = Modifier
      .fillMaxSize()
      .pointerInput(Unit) {
        detectTransformGestures(panZoomLock = false) {
            gestureCentroid, gesturePan, gestureZoom, gestureRotation ->
            // 原本的尺寸 * 放大縮小的尺寸
            // coerceIn(縮放最小值, 縮放最大值)
            // 縮小不能小於0.5f 放大不能超過3倍
          scale = (scale * gestureZoom).coerceIn(0.5f, 3f)
        }
      }
  ) {
    Column {
      Box(modifier = Modifier
        .size(200.dp)
        // 設定放大縮小
        .graphicsLayer {
          scaleX = scale
          scaleY = scale
        }
        .background(Color.Blue)
      )
    }
  }
}