Pop up window flutter

   import 'package:flutter/material.dart';

void main() {
  runApp(new MaterialApp(home: new MyApp()));
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _formKey = GlobalKey<FormState>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Flutter"),
      ),
      body: Center(
        child: RaisedButton(
          onPressed: () {
            showDialog(
                context: context,
                builder: (BuildContext context) {
                  return AlertDialog(
                    content: Stack(
                      overflow: Overflow.visible,
                      children: <Widget>[
                        Positioned(
                          right: -40.0,
                          top: -40.0,
                          child: InkResponse(
                            onTap: () {
                              Navigator.of(context).pop();
                            },
                            child: CircleAvatar(
                              child: Icon(Icons.close),
                              backgroundColor: Colors.red,
                            ),
                          ),
                        ),
                        Form(
                          key: _formKey,
                          child: Column(
                            mainAxisSize: MainAxisSize.min,
                            children: <Widget>[
                              Padding(
                                padding: EdgeInsets.all(8.0),
                                child: TextFormField(),
                              ),
                              Padding(
                                padding: EdgeInsets.all(8.0),
                                child: TextFormField(),
                              ),
                              Padding(
                                padding: const EdgeInsets.all(8.0),
                                child: RaisedButton(
                                  child: Text("Submitß"),
                                  onPressed: () {
                                    if (_formKey.currentState.validate()) {
                                      _formKey.currentState.save();
                                    }
                                  },
                                ),
                              )
                            ],
                          ),
                        ),
                      ],
                    ),
                  );
                });
          },
          child: Text("Open Popup"),
        ),
      ),
    );
  }
}

Source: stackoverflow.com

Similar codes

0 vote195 views2 answers
Random array in python
Python
0 vote211 views1 answer
Finding the Sum of a Symmetrical Sub-List
Python
0 vote192 views1 answer
How to use fastapi ApiClient with pytest
Python
9 votes196 views3 answers
Python array from 1 to n
Python
0 vote241 views1 answer
Selenium python get element by type
Python
1 vote179 views2 answers
Python line break inside string
Python
57 votes201 views4 answers
Get date and time in python
Python
51 votes171 views6 answers
Drop a column in pandas
Python
4 votes205 views1 answer
Pandas check if value in column is in a list
Python
35 votes220 views6 answers
Lambda python
Python