Scroll and controller priority flutter - flutter

Question

i have a CupertinoModalBottomSheet that is closing by scrolling down. And in this page i have image that i can pinch by two fingers. Is there any way to change priority to pinching when two fingers on screen. Because when i put two fingers on screen i can still close the page by scrolling down until i start pinching.
class PinchZoom extends StatefulWidget {
final Widget child;
PinchZoom({
Key? key,
required this.child,
}) : super(key: key);
#override
State<PinchZoom> createState() => _PinchZoomState();
}
class _PinchZoomState extends State<PinchZoom>
with SingleTickerProviderStateMixin {
late TransformationController controller;
late AnimationController animationController;
Animation<Matrix4>? animation;
Map<int, Offset> touchPositions = <int, Offset>{};
final double minScale = 1;
final double maxScale = 2;
double scale = 1;
OverlayEntry? entry;
#override
void initState() {
super.initState();
controller = TransformationController();
animationController = AnimationController(
vsync: this,
duration: Duration(milliseconds: 200),
)
..addListener(() => controller.value = animation!.value)
..addStatusListener((status) {
if (status == AnimationStatus.completed) {
removeOverlay();
}
});
}
#override
void dispose() {
controller.dispose();
animationController.dispose();
super.dispose();
}
#override
Widget build(BuildContext context) =>
BlocBuilder<DishInfoCubit, DishInfoState>(
builder: (_, _state) {
final dishCubit = BlocProvider.of<DishInfoCubit>(context);
return Builder(
builder: (context) => Listener(
onPointerMove: (opm) {
savePointerPosition(opm.pointer, opm.position);
if (touchPositions.length > 1) {
dishCubit.setIsPinchInProgress(true);
}
},
onPointerDown: (opm) {
savePointerPosition(opm.pointer, opm.position);
if (touchPositions.length > 1) {
dishCubit.setIsPinchInProgress(true);
}
},
onPointerCancel: (opc) {
clearPointerPosition(opc.pointer);
if (touchPositions.length < 2) {
dishCubit.setIsPinchInProgress(false);
}
},
onPointerUp: (opc) {
clearPointerPosition(opc.pointer);
if (touchPositions.length < 2) {
dishCubit.setIsPinchInProgress(false);
}
},
child: InteractiveViewer(
transformationController: controller,
clipBehavior: Clip.none,
panEnabled: false,
minScale: minScale,
maxScale: maxScale,
onInteractionStart: (details) {
print("trying to start anim");
if (details.pointerCount < 2) return;
animationController.stop();
},
onInteractionEnd: (details) {
if (details.pointerCount != 1) return;
resetAnimation();
dishCubit.setIsPinchInProgress(false);
},
child: AspectRatio(
aspectRatio: 1,
child: widget.child,
),
),
),
);
},
);
void removeOverlay() {
entry?.remove();
entry = null;
}
void resetAnimation() {
animation = Matrix4Tween(
begin: controller.value,
end: Matrix4.identity(),
).animate(
CurvedAnimation(parent: animationController, curve: Curves.easeInOut),
);
animationController.forward(from: 0);
}
void savePointerPosition(int index, Offset position) {
setState(() {
touchPositions[index] = position;
});
}
void clearPointerPosition(int index) {
setState(() {
touchPositions.remove(index);
});
}
}