156 Start
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import 'package:flutter/material.dart';
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import 'package:flutter_navigation/models/category.dart';
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const availableCategories = [
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Category(
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id: 'c1',
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title: 'Italian',
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color: Colors.purple,
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),
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Category(
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id: 'c2',
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title: 'Quick & Easy',
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color: Colors.red,
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),
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Category(
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id: 'c3',
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title: 'Hamburgers',
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color: Colors.orange,
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),
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Category(
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id: 'c4',
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title: 'German',
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color: Colors.amber,
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),
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Category(
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id: 'c5',
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title: 'Light & Lovely',
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color: Colors.blue,
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),
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Category(
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id: 'c6',
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title: 'Exotic',
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color: Colors.green,
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),
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Category(
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id: 'c7',
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title: 'Breakfast',
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color: Colors.lightBlue,
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),
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Category(
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id: 'c8',
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title: 'Asian',
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color: Colors.lightGreen,
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),
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Category(
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id: 'c9',
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title: 'French',
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color: Colors.pink,
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),
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Category(
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id: 'c10',
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title: 'Summer',
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color: Colors.teal,
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),
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];
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@ -1,125 +1,29 @@
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import 'package:flutter/material.dart';
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import 'package:google_fonts/google_fonts.dart';
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import 'package:flutter_navigation/screens/categories.dart';
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final theme = ThemeData(
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useMaterial3: true,
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colorScheme: ColorScheme.fromSeed(
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brightness: Brightness.dark,
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seedColor: const Color.fromARGB(255, 131, 57, 0),
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),
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textTheme: GoogleFonts.latoTextTheme(),
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);
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void main() {
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runApp(const MyApp());
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runApp(const App());
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}
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class MyApp extends StatelessWidget {
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const MyApp({super.key});
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class App extends StatelessWidget {
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const App({super.key});
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// This widget is the root of your application.
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'Flutter Demo',
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theme: ThemeData(
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// This is the theme of your application.
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//
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// TRY THIS: Try running your application with "flutter run". You'll see
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// the application has a purple toolbar. Then, without quitting the app,
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// try changing the seedColor in the colorScheme below to Colors.green
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// and then invoke "hot reload" (save your changes or press the "hot
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// reload" button in a Flutter-supported IDE, or press "r" if you used
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// the command line to start the app).
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//
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// Notice that the counter didn't reset back to zero; the application
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// state is not lost during the reload. To reset the state, use hot
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// restart instead.
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//
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// This works for code too, not just values: Most code changes can be
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// tested with just a hot reload.
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colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
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useMaterial3: true,
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),
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home: const MyHomePage(title: 'Flutter Demo Home Page'),
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);
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}
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}
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class MyHomePage extends StatefulWidget {
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const MyHomePage({super.key, required this.title});
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// This widget is the home page of your application. It is stateful, meaning
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// that it has a State object (defined below) that contains fields that affect
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// how it looks.
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// This class is the configuration for the state. It holds the values (in this
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// case the title) provided by the parent (in this case the App widget) and
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// used by the build method of the State. Fields in a Widget subclass are
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// always marked "final".
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final String title;
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@override
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State<MyHomePage> createState() => _MyHomePageState();
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}
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class _MyHomePageState extends State<MyHomePage> {
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int _counter = 0;
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void _incrementCounter() {
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setState(() {
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// This call to setState tells the Flutter framework that something has
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// changed in this State, which causes it to rerun the build method below
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// so that the display can reflect the updated values. If we changed
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// _counter without calling setState(), then the build method would not be
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// called again, and so nothing would appear to happen.
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_counter++;
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});
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}
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@override
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Widget build(BuildContext context) {
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// This method is rerun every time setState is called, for instance as done
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// by the _incrementCounter method above.
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//
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// The Flutter framework has been optimized to make rerunning build methods
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// fast, so that you can just rebuild anything that needs updating rather
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// than having to individually change instances of widgets.
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return Scaffold(
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appBar: AppBar(
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// TRY THIS: Try changing the color here to a specific color (to
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// Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
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// change color while the other colors stay the same.
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backgroundColor: Theme.of(context).colorScheme.inversePrimary,
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// Here we take the value from the MyHomePage object that was created by
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// the App.build method, and use it to set our appbar title.
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title: Text(widget.title),
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),
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body: Center(
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// Center is a layout widget. It takes a single child and positions it
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// in the middle of the parent.
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child: Column(
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// Column is also a layout widget. It takes a list of children and
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// arranges them vertically. By default, it sizes itself to fit its
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// children horizontally, and tries to be as tall as its parent.
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//
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// Column has various properties to control how it sizes itself and
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// how it positions its children. Here we use mainAxisAlignment to
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// center the children vertically; the main axis here is the vertical
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// axis because Columns are vertical (the cross axis would be
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// horizontal).
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//
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// TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
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// action in the IDE, or press "p" in the console), to see the
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// wireframe for each widget.
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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const Text(
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'You have pushed the button this many times:',
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),
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Text(
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'$_counter',
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style: Theme.of(context).textTheme.headlineMedium,
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),
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],
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),
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),
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floatingActionButton: FloatingActionButton(
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onPressed: _incrementCounter,
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tooltip: 'Increment',
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child: const Icon(Icons.add),
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), // This trailing comma makes auto-formatting nicer for build methods.
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theme: theme,
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home: const CategoriesScreen(),
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);
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}
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}
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@ -0,0 +1,13 @@
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import 'package:flutter/material.dart';
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class Category {
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const Category({
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required this.id,
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required this.title,
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this.color = Colors.orange,
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});
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final String id;
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final String title;
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final Color color;
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}
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@ -0,0 +1,30 @@
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import 'package:flutter/material.dart';
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import 'package:flutter_navigation/data/dummy_data.dart';
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import '../widgets/category_grid_item.dart';
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class CategoriesScreen extends StatelessWidget {
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const CategoriesScreen({super.key});
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('Pick your category'),
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),
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body: GridView(
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padding: const EdgeInsets.all(24),
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gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 2,
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childAspectRatio: 3 / 2,
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crossAxisSpacing: 20,
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mainAxisSpacing: 20,
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),
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children: [
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for (final category in availableCategories)
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CategoryGridItem(category: category)
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],
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),
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);
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}
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}
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@ -0,0 +1,32 @@
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import 'package:flutter/material.dart';
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import '../models/category.dart';
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class CategoryGridItem extends StatelessWidget {
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const CategoryGridItem({super.key, required this.category});
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final Category category;
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@override
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Widget build(BuildContext context) {
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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gradient: LinearGradient(
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colors: [
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category.color.withOpacity(0.55),
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category.color.withOpacity(0.9),
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],
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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),
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),
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child: Text(
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category.title,
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style: Theme.of(context).textTheme.titleLarge!.copyWith(
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color: Theme.of(context).colorScheme.onBackground,
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),
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),
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);
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}
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}
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