changeOnTap` is not triggering the UI to update on my stateful widget about toggle_switch

[mandolf0]

The problem seems to stem from having too many parent widgets above the toggle_switch.

Scaffold body: Container>Column>toggle_wtich does the trick.

import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:toggle_switch/toggle_switch.dart';

class ToggleDemo extends StatefulWidget {
  @override
  _ToggleDemoState createState() => _ToggleDemoState();
}

class _ToggleDemoState extends State<ToggleDemo> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Toggle Demo")),
      body: Container(
        child: Column(
          children: [
            ToggleSwitch(
              changeOnTap: true,
              minWidth: 110.0,
              initialLabelIndex: 0,
              cornerRadius: 20.0,
              activeFgColor: Colors.white,
              // activeBgColors: Colors.white,
              inactiveBgColor: Colors.grey,
              inactiveFgColor: Colors.white,
              labels: ['Macho', 'Hembra'],
              icons: [FontAwesomeIcons.mars, FontAwesomeIcons.venus],
              activeBgColors: [Colors.blue, Colors.pink],
              onToggle: (index) async {
                print('switched to: $index');
              },
            ),
          ],
        ),
      ),
    );
  }
}