PMU_Gerimovich_PIbd-32/lib/main.dart

import 'package:flutter/material.dart';
import 'package:fl_chart/fl_chart.dart';
import 'StockCategory.dart';

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 Ilya Maximovich'),
    );
  }
}

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(),
    );
  }
}


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

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

class StocksWidget extends StatefulWidget {
  const StocksWidget({super.key});

  @override
  State<StocksWidget> createState() => _StocksWidgetState();
}

class _StocksWidgetState extends State<StocksWidget> {
  final List<double> prices = [52.90, 77, 89, 111, 135.43, 157.50, 111.11];

  Future<void> _fetchNewPrice() async {
    await Future.delayed(const Duration(seconds: 1));
    setState(() {
      prices.add(prices.last + (prices.last * 0.1));
      //if (prices.length > 5) {
      //  prices.removeAt(0);
      //}
    });
  }

  @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: 135.431111,
          imageUrl: 'https://data.cbonds.info/organisations_logos/21/21.png',
          category: StockCategory.oilgas),
      Stock(
          name: 'Сбербанк',
          imageUrl:
          'https://data.cbonds.info/organisations_logos/313/1615279834sberbank__2-01.png',
          category: StockCategory.finance),
      Stock(),
    ];

    return Center(
      child: SingleChildScrollView(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            ...stocks.map((e) => StockCard(stock: e)),
            const SizedBox(height: 20),
            ElevatedButton(
              onPressed: _fetchNewPrice,
              child: const Text('Добавить новую цену'),
            ),
            const SizedBox(height: 20),
            SizedBox(
              height: 300,
              child: LineChart(
                LineChartData(
                  lineBarsData: [
                    LineChartBarData(
                      spots: prices
                          .asMap()
                          .map((index, price) => MapEntry(index.toDouble(), FlSpot(index.toDouble(), price)))
                          .values
                          .toList(),
                      isCurved: true,
                      color: Colors.blue,
                      barWidth: 3,
                      dotData: const FlDotData(show: false),
                    ),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

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(8.5),
      child: Padding(
        padding: const EdgeInsets.all(20),
        child: Row(
          children: [
            Image.network(
              stock.imageUrl ?? 'https://img.freepik.com/premium-vector/vector-illustration-about-concept-of-no-result-data-or-document-or-file-not-found_675567-5734.jpg',
              width: 85,
              height: 85,
            ),
            const SizedBox(width: 20),
            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,
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}