mnemonic_phrase 0.1.1 mnemonic_phrase: ^0.1.1 copied to clipboard
Displays a mnemonic phrase / Allows users to provide a mnemonic phrase.
import 'package:flutter/material.dart';
import 'package:mnemonic_phrase/mnemonic_phrase.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Mnemonic Phrase Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
initialRoute: '/',
routes: {
'/': (context) => const MyHomePage(),
'/changePhrase': (context) => ChangePhrasePage(),
},
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key}) : super(key: key);
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
String phrase =
'favorite robot woman shy observe crazy prefer script tonight eight actress kit';
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Mnemonic Phrase Example'),
),
body: Container(
padding: const EdgeInsets.all(16),
alignment: Alignment.center,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
MnemonicPhrase(phrase: phrase),
Padding(
padding: const EdgeInsets.symmetric(vertical: 32),
child: Text(phrase),
),
ElevatedButton(
child: const Text('Change phrase'),
onPressed: () =>
Navigator.pushNamed(context, '/changePhrase').then((value) {
if (value != null) {
setState(() {
phrase = value as String;
});
}
}),
),
],
),
),
);
}
}
class ChangePhrasePage extends StatelessWidget {
ChangePhrasePage({Key? key}) : super(key: key);
String? phrase;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Change Phrase'),
),
body: Container(
padding: const EdgeInsets.all(16),
color: Colors.white,
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Expanded(
child: Container(
padding: const EdgeInsets.only(top: 4),
child: MnemonicPhraseInput(
// onPhraseChange is executed every single time the user changes the phrase
// Will return null if the phrase is incomplete/invalid, otherwise will return a phrase
onPhraseChange: (value) => phrase = value,
),
),
),
Container(
padding: const EdgeInsets.all(16),
child: Center(
child: ElevatedButton(
child: const Text('Update Phrase'),
onPressed: () {
if (phrase != null) {
Navigator.pop(context, phrase);
} else {
const snackBar = SnackBar(
content: Text('The phrase is invalid.'),
);
ScaffoldMessenger.of(context).showSnackBar(snackBar);
}
},
),
),
),
],
),
),
);
}
}