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January 4, 2022 15:12
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| import 'package:flutter/material.dart'; | |
| class MyApp extends StatelessWidget { | |
| const MyApp({Key? key}) : super(key: key); | |
| @override | |
| Widget build(BuildContext context) { | |
| return const MaterialApp( | |
| title: 'Showcasing Flutter', | |
| home: HomePage(), | |
| ); | |
| } | |
| } | |
| class HomePage extends StatefulWidget { | |
| const HomePage({Key? key}) : super(key: key); | |
| @override | |
| State<HomePage> createState() => _HomePageState(); | |
| } | |
| class _HomePageState extends State<HomePage> { | |
| String message = ''; | |
| @override | |
| Widget build(BuildContext context) { | |
| return Scaffold( | |
| body: Center( | |
| child: Column( | |
| mainAxisAlignment: MainAxisAlignment.center, | |
| children: [ | |
| Text(message, style: const TextStyle(color: Colors.black, fontSize: 30)), | |
| const SizedBox(height: 18), | |
| TextButton( | |
| style: ButtonStyle(backgroundColor: MaterialStateProperty.all(Colors.green)), | |
| onPressed: onTapShowDialog, | |
| child: const Text( | |
| 'Show Dialog', | |
| style: TextStyle(color: Colors.white), | |
| ), | |
| ), | |
| ], | |
| ), | |
| ), | |
| ); | |
| } | |
| void onTapShowDialog() { | |
| showAlertDialogs( | |
| context, | |
| title: 'Showcasing Flutter', | |
| content: 'Purely for learning & teaching...', | |
| ).then((value) { | |
| setState(() { | |
| if (value == true) { | |
| message = '[Yes] was tapped!!!'; | |
| } else if (value == false) { | |
| message = '[NO] was tapped!!!'; | |
| } else { | |
| message = '[Nothing] was Tapped!!!'; | |
| } | |
| }); | |
| debugPrint(value.toString()); | |
| }); | |
| } | |
| } | |
| class MyAlertDialog extends StatelessWidget { | |
| final String title; | |
| final String content; | |
| final String buttonText1; | |
| final String? buttonText2; | |
| final void Function(bool v) callback; | |
| const MyAlertDialog( | |
| {Key? key, | |
| required this.title, | |
| required this.content, | |
| required this.buttonText1, | |
| this.buttonText2, | |
| required this.callback}) | |
| : super(key: key); | |
| @override | |
| Widget build(BuildContext context) { | |
| return AlertDialog( | |
| title: Text(title), | |
| content: Text(content), | |
| actions: <Widget>[ | |
| TextButton( | |
| style: ButtonStyle(backgroundColor: MaterialStateProperty.all(Colors.green)), | |
| child: Text(buttonText1, style: const TextStyle(color: Colors.white)), | |
| onPressed: () { | |
| ///When a user taps on [YES] | |
| callback(true); | |
| Navigator.pop(context); | |
| }, | |
| ), | |
| if (buttonText2 != null) | |
| TextButton( | |
| child: Text("$buttonText2", style: const TextStyle(color: Colors.black)), | |
| onPressed: () { | |
| ///When a user taps on [NO] | |
| callback(false); | |
| Navigator.pop(context); | |
| }, | |
| ), | |
| ], | |
| ); | |
| } | |
| } | |
| Future<bool?> showAlertDialogs(BuildContext context, {required String title, required String content}) async { | |
| bool? response; | |
| await showDialog( | |
| context: context, | |
| builder: (context) => MyAlertDialog( | |
| title: title, | |
| content: content, | |
| buttonText1: 'Yes', | |
| buttonText2: 'No', | |
| callback: (bool v) { | |
| response = v; | |
| }, | |
| ), | |
| ); | |
| return response; | |
| } |
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