Flutter 在 Vertica 拖动更新上无法按预期工作

我已经编写了下面的代码，当用户想要的时候，可以让容器向左滑动.

    import 'package:flutter/material.dart';

double swipH = 0 ;
double swipV = 0 ;
class App extends StatefulWidget {
  const App({Key? key}) : super(key: key);

  @override
  State<App> createState() => _AppState();
}

class _AppState extends State<App> {

 bool  isV = true ;
 bool isH = true ;


  @override
  Widget build(BuildContext context) {

    return Scaffold(
      body:   Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [

          GestureDetector(




              onLongPress: (){
                debugPrint('vvvvvvvvv');
              },




                onPanUpdate:(noti){

                  if(noti.delta.dy < 0&&isV){
                    isH = false;
                    swipV += noti.delta.dy;
                    setState(() {});
                  }

                  if(noti.delta.dx < 0&&isH){
                    isV = false;
                    debugPrint('Started');
                    swipH += noti.delta.dx;
                    setState(() {});
                  }
                },

            onPanEnd:(noti){
                isV = true ;
               isH = true ;
              swipH=0;
              swipV = 0 ;
              setState(() {});
            },


              child: Transform.translate(
                offset: Offset(swipH, swipV),
                child: Container(
                  padding: const EdgeInsets.all(8),
                  height: 200,
                  width: MediaQuery.of(context).size.width / 2,
                  color: Colors.red,
                ),
              ),

            ),

          ],
        ),
      ),

    );
  }
}

编辑

 onLongPress: (){
 debugPrint('onLongPress');
  },

有什么好主意吗

不用onLongPress.一切都很好..但我需要这个例子中逻辑相同的方法