wind/lib/main.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:wind/newsgroup_list_view.dart';
import 'package:wind/nntp_client.dart';
import 'package:wind/thread_list_view.dart';
import 'package:wind/thread_model.dart';
import 'package:wind/thread_screen.dart';

import 'thread_list_model.dart';

void main() {
  runApp(MultiProvider(providers: [
    Provider<NNTPClient>(create: ((context) => NNTPClient("localhost:1120"))),
    ChangeNotifierProxyProvider<NNTPClient, ThreadListModel>(
        create: (context) => ThreadListModel(),
        update: (context, client, model) {
          model!.client = client;
          return model;
        }),
    ChangeNotifierProxyProvider<NNTPClient, ThreadModel>(
        create: (context) => ThreadModel(),
        update: (context, client, model) {
          model!.client = client;
          return model;
        }),
  ], child: MyApp()));
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Wind',
      theme: ThemeData(
        primarySwatch: Colors.indigo,
      ),
      home: MyHomePage(title: 'Wind'),
      routes: {'/thread': (context) => ThreadScreen()},
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  late NNTPClient nntpClient;

  @override
  void initState() {
    super.initState();

    nntpClient = NNTPClient("localhost:1120");
  }

  @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 Scaffold(
        appBar: 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: Text(widget.title),
        ),
        body: Center(
          child: Container(
            child: Row(
              children: [
                SizedBox(
                  width: 300,
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Container(
                          margin: EdgeInsets.all(16),
                          child: Text(
                            "Новостные группы",
                            style: TextStyle(
                                fontWeight: FontWeight.bold, fontSize: 20),
                          )),
                      Expanded(
                          child: Builder(
                              builder: (context) =>
                                  NewsgroupListView(client: nntpClient))),
                    ],
                  ),
                ),
                const VerticalDivider(thickness: 1, width: 1),
                Expanded(
                    child: Center(
                  child: Consumer<ThreadListModel>(
                      builder: ((context, value, child) => ThreadListView())),
                ))
              ],
            ),
          ),
        ));
  }
}