call method in container flutter - flutter

Question

I have class called A.dart in that I am usnign Interprogressbar as below
new Container(
margin: const EdgeInsets.fromLTRB(0, 10, 0, 0),
child: IntervalProgressBar(
direction: IntervalProgressDirection.horizontal,
max: count,
progress: count1,
intervalSize: 2,
size: Size(600, 10),
highlightColor: Colors.pink,
defaultColor: Colors.grey,
intervalColor: Colors.transparent,
intervalHighlightColor: Colors.transparent,
reverse: false,
radius: 0)),
Once the user clicks a button I am navigating to another class from A.dart to a class called B.dart. Once use completes process in class B.dart I ll pop the class B.dart. Again A.dart will be visible for the user. So my question us how can I restart the IntervalProgressBar with the updated value once user comes from B.dart to A,dart.

Answer 1

You can copy paste run full code below
You can await Navigator.push then call setState
void _gotoB() async {
String parameter = await Navigator.push(
context,
MaterialPageRoute(builder: (context) => RouteB()),
);
setState(() {
count1 = int.tryParse(parameter);
});
}
...
RaisedButton(
child: Text('Go back'),
onPressed: () {
Navigator.pop(context, _textEditingController.text);
},
),
working demo
full code
import 'package:flutter/material.dart';
import 'package:intervalprogressbar/intervalprogressbar.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int count = 10;
int count1 = 3;
void _gotoB() async {
String parameter = await Navigator.push(
context,
MaterialPageRoute(builder: (context) => RouteB()),
);
setState(() {
count1 = int.tryParse(parameter);
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
margin: const EdgeInsets.fromLTRB(0, 10, 0, 0),
child: IntervalProgressBar(
direction: IntervalProgressDirection.horizontal,
max: count,
progress: count1,
intervalSize: 2,
size: Size(600, 10),
highlightColor: Colors.pink,
defaultColor: Colors.grey,
intervalColor: Colors.transparent,
intervalHighlightColor: Colors.transparent,
reverse: false,
radius: 0)),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _gotoB,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
class RouteB extends StatefulWidget {
#override
_RouteBState createState() => _RouteBState();
}
class _RouteBState extends State<RouteB> {
TextEditingController _textEditingController = TextEditingController();
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
body: Column(
children: [
TextField(
controller: _textEditingController,
),
RaisedButton(
child: Text('Go back'),
onPressed: () {
Navigator.pop(context, _textEditingController.text);
},
),
],
)),
);
}
}