Showing a dialog that is in another file in flutter app - flutter

Question

I'm trying to show a dialog box that is in another file in a StatefullWidget but when I call its function nothing is happening.
The reason I want to do this is because there is too much nesting of code in my code so I want to keep things simple and clean.
Below is the dialog.dart file.
import 'package:flutter/material.dart';
class PersonDetailsDialog extends StatefulWidget {
PersonDetailsDialog({Key key}) : super(key: key);
#override
_PersonDetailsDialogState createState() {
return _PersonDetailsDialogState();
}
}
class _PersonDetailsDialogState extends State<PersonDetailsDialog> {
#override
Widget build(BuildContext context) {
Future<void> _neverSatisfied() async {
return showDialog<void>(
context: context,
barrierDismissible: false, // user must tap button!
builder: (BuildContext context) {
return AlertDialog(
title: Text('Rewind and remember'),
content: SingleChildScrollView(
child: ListBody(
children: <Widget>[
Text('You will never be satisfied.'),
Text('You\’re like me. I’m never satisfied.'),
],
),
),
actions: <Widget>[
FlatButton(
child: Text('Regret'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
);
},
);
}
}
}
Below is the main.dart file.
mport 'package:flutter/material.dart';
import 'package:practical_0/homepage.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue
),
home: Homepage(),
);
}
}
Below is homepage.dart file where I'm trying to show the dialog when the user clicks RaisedButton but nothing happens.
import 'package:flutter/material.dart';
class Homepage extends StatelessWidget {
final double heightFactor = 600/896;
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
child: RaisedButton(
onPressed: PersonDetailsDialog(), // show dialog
),
),
);
}
}

Answer 1

You have to use ShowDialog Where You want to show dialog.
I hope that following example clear your idea.
class Delete extends StatefulWidget {
#override
_DeleteState createState() => _DeleteState();
}
class _DeleteState extends State<Delete> {
BuildContext parent, child;
#override
Widget build(BuildContext context) => Scaffold(
body: Container(
child: Center(
child: RaisedButton(
onPressed: () {
showDialog(
context: context,
barrierDismissible: false,
child: PersonDetailsDialog());
}, // show dialog
),
),
),
);
}
class PersonDetailsDialog extends StatefulWidget {
PersonDetailsDialog({Key key}) : super(key: key);
#override
_PersonDetailsDialogState createState() {
return _PersonDetailsDialogState();
}
}
class _PersonDetailsDialogState extends State<PersonDetailsDialog> {
#override
Widget build(BuildContext context) {
return AlertDialog(
title: Text('Rewind and remember'),
content: SingleChildScrollView(
child: ListBody(
children: <Widget>[
Text('You will never be satisfied.'),
Text('You\’re like me. I’m never satisfied.'),
],
),
),
actions: <Widget>[
FlatButton(
child: Text('Regret'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
);
}
}

Answer 2

Here is an example:
Show dialog is an async function
child: RaisedButton(
onPressed: () async{
final result = await showDialog(
context: context,
builder: (_) => AlertWidget(),
);
return result;
},