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The 'Write Your First App' main.dart but with an intentional error in place.
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import 'package:flutter/material.dart'; | |
import 'package:english_words/english_words.dart'; | |
import 'package:catcher/catcher_plugin.dart'; | |
import 'error_handler.dart'; | |
// void main() => runApp(MyApp()); | |
//void main() => ErrorHandler.runApp(MyApp()); | |
void main() { | |
CatcherOptions debugOptions = | |
CatcherOptions(DialogReportMode(), [ConsoleHandler(), ToastHandler()]); | |
CatcherOptions releaseOptions = CatcherOptions(DialogReportMode(), [ | |
EmailManualHandler(["recipient@email.com"]) | |
]); | |
// Override the default 'ErrorWidget.builder' | |
Catcher.addDefaultErrorWidget(showStacktrace: true); | |
Catcher(MyApp(), debugConfig: debugOptions, releaseConfig: releaseOptions); | |
} | |
class MyApp extends StatelessWidget { | |
// #docregion build | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
navigatorKey: Catcher.navigatorKey, | |
title: 'Startup Name Generator', | |
theme: ThemeData( | |
primaryColor: Colors.white, | |
), | |
home: RandomWords(), | |
); | |
} | |
} | |
class RandomWordsState extends State<RandomWords> { | |
final _suggestions = <WordPair>[]; | |
final Set<WordPair> _saved = Set<WordPair>(); | |
final _biggerFont = const TextStyle(fontSize: 18.0); | |
@override | |
void initState() { | |
super.initState(); | |
handler = ErrorHandler(); | |
} | |
ErrorHandler handler; | |
@override | |
void dispose() { | |
handler?.dispose(); | |
super.dispose(); | |
} | |
Widget _buildSuggestions() { | |
return ListView.builder( | |
padding: const EdgeInsets.all(16.0), | |
itemBuilder: /*1*/ (context, i) { | |
if (i.isOdd) return Divider(); /*2*/ | |
final index = i ~/ 2; /*3*/ | |
if (index >= _suggestions.length) { | |
_suggestions.addAll(generateWordPairs().take(10)); /*4*/ | |
//****** Clear the suggestions here. ******// | |
_suggestions.clear(); | |
} | |
//****** to cause an error here. ******// | |
return _buildRow(_suggestions[index]); | |
}); | |
} | |
Widget _buildRow(WordPair pair) { | |
final bool alreadySaved = _saved.contains(pair); | |
return ListTile( | |
title: Text( | |
pair.asPascalCase, | |
style: _biggerFont, | |
), | |
trailing: Icon( | |
alreadySaved ? Icons.favorite : Icons.favorite_border, | |
color: alreadySaved ? Colors.red : null, | |
), | |
onTap: () { | |
setState(() { | |
if (alreadySaved) { | |
_saved.remove(pair); | |
} else { | |
_saved.add(pair); | |
} | |
}); | |
}, | |
); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return Scaffold( | |
appBar: AppBar( | |
title: Text('Startup Name Generator'), | |
actions: <Widget>[ | |
IconButton(icon: Icon(Icons.list), onPressed: _pushSaved), | |
], | |
), | |
body: _buildSuggestions(), | |
); | |
} | |
void _pushSaved() { | |
Navigator.of(context).push( | |
MaterialPageRoute<void>( | |
// Add 20 lines from here... | |
builder: (BuildContext context) { | |
final Iterable<ListTile> tiles = _saved.map( | |
(WordPair pair) { | |
return ListTile( | |
title: Text( | |
pair.asPascalCase, | |
style: _biggerFont, | |
), | |
); | |
}, | |
); | |
final List<Widget> divided = ListTile.divideTiles( | |
context: context, | |
tiles: tiles, | |
).toList(); | |
return Scaffold( | |
appBar: AppBar( | |
title: Text('Saved Suggestions'), | |
), | |
body: ListView(children: divided), | |
); | |
}, | |
), | |
); | |
} | |
} | |
class RandomWords extends StatefulWidget { | |
@override | |
RandomWordsState createState() => RandomWordsState(); | |
} |
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