From 27023eec84a69971bd0ddb33024e61a6135550a5 Mon Sep 17 00:00:00 2001 From: Vishesh Handa Date: Sun, 13 May 2018 07:38:17 +0200 Subject: [PATCH] Implement first tutorial of startup names --- lib/main.dart | 165 +++++++++++++++++++++++++------------------------- pubspec.lock | 7 +++ pubspec.yaml | 2 + 3 files changed, 92 insertions(+), 82 deletions(-) diff --git a/lib/main.dart b/lib/main.dart index 94b23e9c..52a741c9 100644 --- a/lib/main.dart +++ b/lib/main.dart @@ -1,109 +1,110 @@ import 'package:flutter/material.dart'; +import 'package:english_words/english_words.dart'; void main() => runApp(new MyApp()); class MyApp extends StatelessWidget { - // This widget is the root of your application. @override Widget build(BuildContext context) { return new MaterialApp( - title: 'Flutter Demo', - theme: new ThemeData( - // This is the theme of your application. - // - // Try running your application with "flutter run". You'll see the - // application has a blue toolbar. Then, without quitting the app, try - // changing the primarySwatch below to Colors.green and then invoke - // "hot reload" (press "r" in the console where you ran "flutter run", - // or press Run > Flutter Hot Reload in IntelliJ). Notice that the - // counter didn't reset back to zero; the application is not restarted. - primarySwatch: Colors.blue, - ), - home: new MyHomePage(title: 'Flutter Demo Home Page'), - ); + title: 'Startup Name Generator', home: new RandomWords()); } } -class MyHomePage extends StatefulWidget { - MyHomePage({Key key, this.title}) : super(key: key); - - // This widget is the home page of your application. It is stateful, meaning - // that it has a State object (defined below) that contains fields that affect - // how it looks. - - // This class is the configuration for the state. It holds the values (in this - // case the title) provided by the parent (in this case the App widget) and - // used by the build method of the State. Fields in a Widget subclass are - // always marked "final". - - final String title; - +class RandomWords extends StatefulWidget { @override - _MyHomePageState createState() => new _MyHomePageState(); + createState() => new RandomWordsState(); } -class _MyHomePageState extends State { - int _counter = 0; +class RandomWordsState extends State { + final _suggestions = []; + final _saved = new Set(); - void _incrementCounter() { - setState(() { - // This call to setState tells the Flutter framework that something has - // changed in this State, which causes it to rerun the build method below - // so that the display can reflect the updated values. If we changed - // _counter without calling setState(), then the build method would not be - // called again, and so nothing would appear to happen. - _counter++; - }); + final _biggerFont = const TextStyle(fontSize: 18.0); + + Widget _buildSuggestions() { + return new ListView.builder( + padding: const EdgeInsets.all(16.0), + itemBuilder: (context, i) { + if (i.isOdd) return new Divider(); + final index = i ~/ 2; + if (index >= _suggestions.length) { + _suggestions.addAll(generateWordPairs().take(10)); + } + return _buildRow(_suggestions[index]); + }, + ); + } + + Widget _buildRow(WordPair pair) { + final alreadySaved = _saved.contains(pair); + + return new ListTile( + title: new Text( + pair.asPascalCase, + style: _biggerFont, + ), + trailing: new 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) { - // This method is rerun every time setState is called, for instance as done - // by the _incrementCounter method above. - // - // The Flutter framework has been optimized to make rerunning build methods - // fast, so that you can just rebuild anything that needs updating rather - // than having to individually change instances of widgets. return new Scaffold( appBar: new AppBar( - // Here we take the value from the MyHomePage object that was created by - // the App.build method, and use it to set our appbar title. - title: new Text(widget.title), + title: new Text('Startup Name Generator'), + actions: [ + new IconButton( + icon: new Icon(Icons.list), + onPressed: _pushSaved, + ), + ], ), - body: new Center( - // Center is a layout widget. It takes a single child and positions it - // in the middle of the parent. - child: new Column( - // Column is also layout widget. It takes a list of children and - // arranges them vertically. By default, it sizes itself to fit its - // children horizontally, and tries to be as tall as its parent. - // - // Invoke "debug paint" (press "p" in the console where you ran - // "flutter run", or select "Toggle Debug Paint" from the Flutter tool - // window in IntelliJ) to see the wireframe for each widget. - // - // Column has various properties to control how it sizes itself and - // how it positions its children. Here we use mainAxisAlignment to - // center the children vertically; the main axis here is the vertical - // axis because Columns are vertical (the cross axis would be - // horizontal). - mainAxisAlignment: MainAxisAlignment.center, - children: [ - new Text( - 'You have pushed the button this many times:', + body: _buildSuggestions(), + ); + } + + void _pushSaved() { + Navigator.of(context).push( + new MaterialPageRoute( + builder: (context) { + final tiles = _saved.map( + (pair) { + return new ListTile( + title: new Text( + pair.asPascalCase, + style: _biggerFont, + ), + ); + }, + ); + final divided = ListTile + .divideTiles( + context: context, + tiles: tiles, + ) + .toList(); + + return new Scaffold( + appBar: new AppBar( + title: new Text('Saved Suggestions'), ), - new Text( - '$_counter', - style: Theme.of(context).textTheme.display1, - ), - ], - ), + body: new ListView(children: divided), + ); + }, ), - floatingActionButton: new FloatingActionButton( - onPressed: _incrementCounter, - tooltip: 'Increment', - child: new Icon(Icons.add), - ), // This trailing comma makes auto-formatting nicer for build methods. ); } } diff --git a/pubspec.lock b/pubspec.lock index f05c3a11..a7c5503e 100644 --- a/pubspec.lock +++ b/pubspec.lock @@ -85,6 +85,13 @@ packages: url: "https://pub.dartlang.org" source: hosted version: "0.1.2" + english_words: + dependency: "direct main" + description: + name: english_words + url: "https://pub.dartlang.org" + source: hosted + version: "3.1.0" flutter: dependency: "direct main" description: flutter diff --git a/pubspec.yaml b/pubspec.yaml index b1ca09f0..c3ea1075 100644 --- a/pubspec.yaml +++ b/pubspec.yaml @@ -8,6 +8,8 @@ dependencies: # The following adds the Cupertino Icons font to your application. # Use with the CupertinoIcons class for iOS style icons. cupertino_icons: ^0.1.0 + english_words: ^3.1.0 + dev_dependencies: flutter_test: