PMU_Gerimovich_PIbd-32/lib/main.dart

import 'dart:math';
import 'package:flutter/material.dart';
// Classes +
// Methods +
// Enums +
// Loops +
// Generics (List<>) +
// Anonymous functions +
// Future +
// Extension +

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Gerimovich demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.red),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Gerimovich I M'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});
  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: const StocksWidget(),
    );
  }
}

enum StockCategory { oilgas, finance, mining }
extension StockCategoryExtension on StockCategory {
  String get name {
    switch (this) {
      case StockCategory.oilgas:
        return 'Нефтегазовая отрасль';
      case StockCategory.finance:
        return 'Банки';
      case StockCategory.mining:
        return 'Добыча полезных ископаемых';
    }
  }
}

class Stock {
  final String name;
  final double price;
  final String imageUrl;
  final StockCategory category;

  Stock({
    required this.name,
    required this.price,
    required this.imageUrl,
    required this.category,
  });
}

class StocksWidget extends StatelessWidget {
  const StocksWidget({super.key});
  @override
  Widget build(BuildContext context) {

    final stocks = [
      Stock(
          name: 'Алроса',
          price: 52.90,
          imageUrl:
          'https://data.cbonds.info/organisations_logos/18/1617957662ALROSA_Rus_COLOUR_RGB.jpg',
          category: StockCategory.mining),
      Stock(
          name: 'Газпром',
          price: 135.43,
          imageUrl: 'https://data.cbonds.info/organisations_logos/21/21.png',
          category: StockCategory.oilgas),
      Stock(
          name: 'Сбербанк',
          price: 257.50,
          imageUrl:
          'https://data.cbonds.info/organisations_logos/313/1615279834sberbank__2-01.png',
          category: StockCategory.finance),
      Stock(
          name: 'Сбербанк',
          price: 111111111.111111111,
          imageUrl:
          'https://data.cbonds.info/organisations_logos/313/1615279834sberbank__2-01.png',
          category: StockCategory.finance),
    ];

    return Center(
      child: SingleChildScrollView(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            ...stocks.map((e) => StockCard(stock: e)),
          ],
        ),
      ),
    );
  }
}

class StockCard extends StatelessWidget {
  final Stock stock;
  const StockCard({super.key, required this.stock});

  @override
  Widget build(BuildContext context) {
    return Card(
      margin: const EdgeInsets.all(8.0),
      child: Padding(
        padding: const EdgeInsets.all(14.0),
        child: Row(
          children: [
            Image.network(
              stock.imageUrl,
              width: 85,
              height: 85,
            ),
            const SizedBox(width: 16.0),
            Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  stock.name,
                  style: Theme.of(context).textTheme.headlineSmall,
                ),
                Text(
                  '${stock.price.toStringAsFixed(2)} р',
                  style: Theme.of(context).textTheme.bodyLarge,
                ),
                Text(
                  stock.category.name,
                  style: Theme.of(context).textTheme.bodySmall,
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}