can't pinch to zoom

[jesussmile]

I am using this widget with google map and open street map but I can't pinch to zoom, pinch to zoom works well with tabviews, any solutions ?

[rafalbednarczuk]

could you provide a reproducible sample?
If it still happens I'll reopen the issue.

I tried pinch to zoom with the sample below and it works fine

import 'package:flutter/material.dart';
import 'package:curved_navigation_bar/curved_navigation_bar.dart';

void main() => runApp(MaterialApp(home: BottomNavBar()));

class BottomNavBar extends StatefulWidget {
  @override
  _BottomNavBarState createState() => _BottomNavBarState();
}

class _BottomNavBarState extends State<BottomNavBar> {
  int _page = 0;
  GlobalKey<CurvedNavigationBarState> _bottomNavigationKey = GlobalKey();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        bottomNavigationBar: CurvedNavigationBar(
          key: _bottomNavigationKey,
          index: 0,
          items: <Widget>[
            Icon(Icons.add, size: 30),
            Icon(Icons.list, size: 30),
            Icon(Icons.compare_arrows, size: 30),
            Icon(Icons.call_split, size: 30),
            Icon(Icons.perm_identity, size: 30),
          ],
          color: Colors.white,
          buttonBackgroundColor: Colors.white,
          backgroundColor: Colors.blueAccent,
          animationCurve: Curves.easeInOut,
          animationDuration: Duration(milliseconds: 600),
          onTap: (index) {
            setState(() {
              _page = index;
            });
          },
          letIndexChange: (index) => true,
        ),
        body: Container(
          color: Colors.blueAccent,
          child: Center(
            child: InteractiveViewer(
              boundaryMargin: const EdgeInsets.all(20.0),
              minScale: 0.5,
              maxScale: 1.6,
              child: Container(
                decoration: const BoxDecoration(
                  gradient: LinearGradient(
                    begin: Alignment.topCenter,
                    end: Alignment.bottomCenter,
                    colors: <Color>[Colors.orange, Colors.red],
                    stops: <double>[0.0, 1.0],
                  ),
                ),
              ),
            ),
          ),
        ));
  }
}