154 lines
3.8 KiB
Dart
154 lines
3.8 KiB
Dart
import 'package:flutter/material.dart';
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import 'dart:math';
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void main() {
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runApp(const MyApp());
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}
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class MyApp extends StatelessWidget {
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const MyApp({super.key});
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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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debugShowCheckedModeBanner: false,
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theme: ThemeData(
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colorScheme: ColorScheme.fromSeed(seedColor: Colors.cyan),
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useMaterial3: true,
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),
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home: const MyHomePage(title: 'Чернышев Георгий Янович'),
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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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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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_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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return Scaffold(
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appBar: AppBar(
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backgroundColor: Theme.of(context).colorScheme.inversePrimary,
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title: Text(widget.title),
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),
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body: Center(
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child: Column(
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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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),
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);
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}
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}
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class Game extends Object {
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final String name;
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final int price;
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final GameType type; //жанр игры
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final String? description;
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@override
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bool operator ==(Object other) {
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if (other is Game) {
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return this.name == other.name;
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}
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return false;
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}
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//стандартный конструктор с именованными параметрами
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Game(
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{required this.name,
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required this.price,
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required this.type,
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this.description});
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//именованный конструктор с примером игры
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Game.exampleLateShift()
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: name = 'Late Shift',
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price = 200,
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type = GameType.FMV,
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description = null;
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void printInfo() {
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print('''
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Игра: $name
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Жанр: ${GameTypeNames[type]}
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Цена: $price руб. ''');
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if (description != null) {
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print('Описание: $description');
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}
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}
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//асинхронный метод - иммитация скачивания
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Future<void> download() async {
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print('Начало загрузки игры $name');
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var rand = Random();
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int time = rand.nextInt(10000) + 100;
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//асинхронность (Future), анонимная функция (Anonymous function)
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await Future.delayed(
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Duration(milliseconds: time), () => print("Игра $name загружена"));
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}
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}
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enum GameType { FMV, Shooter, Strategy, Horror }
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//Названия жанров на русском
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const Map<GameType, String> GameTypeNames = {
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GameType.FMV: "FMV",
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GameType.Shooter: "Шутер",
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GameType.Strategy: "Стратегия",
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GameType.Horror: "Хоррор"
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};
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void availableTypesRus() => printMapValues(GameTypeNames);
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//цикл (loop) + generic (хз, куда ещё их можно)
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void printMapValues<T, U>(Map<T, U> map) {
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for (var val in map.values) {
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print(val);
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}
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}
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extension GameTypeRus on GameType {
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String get rusName {
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switch(this) {
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case GameType.FMV:
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return 'FMV';
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case GameType.Shooter:
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return 'Шутер';
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case GameType.Strategy:
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return 'Стратегия';
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case GameType.Horror:
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return 'Хоррор';
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}
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}
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} |