flutter_test1/lib/main.dart

118 lines
3.0 KiB
Dart

// Copyright 2018 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:english_words/english_words.dart';
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return const MaterialApp(
title: 'Startup Name Generator',
home: RandomWords(),
);
}
}
class _RandomWordsState extends State<RandomWords> {
final _suggestions = <WordPair>[];
final _saved = <WordPair>{};
final _biggerFont = const TextStyle(fontSize: 18);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Startup Name Generator'),
actions: [
IconButton(
icon: const Icon(Icons.list),
onPressed: _pushSaved,
tooltip: 'Saved Suggestions',
),
],
),
body: ListView.builder(
padding: const EdgeInsets.all(16.0),
itemBuilder: (context, i) {
if (i.isOdd) return const Divider();
final index = i ~/ 2;
if (index >= _suggestions.length) {
_suggestions.addAll(generateWordPairs().take(10));
}
final alreadySaved = _saved.contains(_suggestions[index]);
return ListTile(
title: Text(
_suggestions[index].asPascalCase,
style: _biggerFont,
),
trailing: Icon(
alreadySaved ? Icons.favorite : Icons.favorite_border,
color: alreadySaved ? Colors.red : null,
semanticLabel: alreadySaved ? 'Remove from saved' : 'Save',
),
onTap: () {
setState(() {
if (alreadySaved) {
_saved.remove(_suggestions[index]);
} else {
_saved.add(_suggestions[index]);
}
});
},
);
},
),
);
}
void _pushSaved() {
Navigator.of(context).push(
MaterialPageRoute<void>(
builder: (context) {
final tiles = _saved.map(
(pair) {
return ListTile(
title: Text(
pair.asPascalCase,
style: _biggerFont,
),
);
},
);
final divided = tiles.isNotEmpty
? ListTile.divideTiles(
context: context,
tiles: tiles,
).toList()
: <Widget>[];
return Scaffold(
appBar: AppBar(
title: const Text('Saved Suggestions'),
),
body: ListView(children: divided),
);
},
),
);
}
}
class RandomWords extends StatefulWidget {
const RandomWords({super.key});
@override
State<RandomWords> createState() => _RandomWordsState();
}