FLUTTER - MASTER

Flutter vs. Qt

mybb@mybb.ru (legioneroff) — Mon, 13 Jan 2020 00:05:16 +0300

�� Qt, �� .
�� Flutter �� ?

�� RadioListTile � ListView.builder

mybb@mybb.ru (SpecDeveloper) — Sun, 12 Jan 2020 22:46:49 +0300

�� . �� . �� Json (��) �� . �� ListView.builder. �� . �� , �.�. �� . �� (onChanged:...)

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class MyTickets extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return MyTicketsState();
  }
}

class MyTicketsState extends State<MyTickets> {



  final Future<List<Ticket>> waitingData = () async {}();

  Future<List<Ticket>> getTicketsFromJson(BuildContext context) async {
    String jsonString = await DefaultAssetBundle.of(context)
        .loadString('json/question_set.json');

    List<dynamic> questionnaires =
        (jsonDecode(jsonString) as Map)['questionnaires'] as List;

    return questionnaires
        .map((dynamic rawTicket) => Ticket.fromJson(rawTicket))
        .toList(growable: false);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: SafeArea(
            child: FutureBuilderWrapper<List<Ticket>>(
      future: getTicketsFromJson(context),
      onSuccess: (BuildContext context, List<Ticket> items) {
        return ListView.builder(
          shrinkWrap: true,
          itemCount: items?.length ?? 0,
          itemBuilder: (context, i) {
            Ticket ticket = items[i];

            return Column(
              children: <Widget>[
                SafeArea(child: Text(ticket.question)),

                Container(
                  child: Image.asset(ticket.picture),
                ),
                Container(
                  child: (ListView.builder(
                    shrinkWrap: true,
                    itemCount: ticket.answers.length,
                    itemBuilder: (context, i) {
                      return Column(
                        children: <Widget>[
                          Align(
                              alignment: Alignment.centerLeft,
                              child: RadioListTile(
                                groupValue: ticket.questionNumber,
                                value: ticket.answers[i],
                                onChanged: (newVal) => setState(() {
                                  ticket.questionNumber = newVal;
                                  //print(index);
                                  //print(ticket.answer);
                                }),
                                activeColor: Colors.blue,
                                title: Text(ticket.answers[i]),
                              ))
                        ],
                      );
                    },
                  )),
                )

                //Text(ticket.answers[i])
              ],
            );
          },
        );
      },
    )));
  }
}

void main() {
  runApp(MaterialApp(
    debugShowCheckedModeBanner: false,
    home: Scaffold(
        appBar: AppBar(
          title: (Text('������')),
        ),
        body: MyTickets()),
    //home: Question();
  ));
}

�� Dart

mybb@mybb.ru (Anton) — Sun, 12 Jan 2020 21:12:35 +0300

� ��, �� Python, � �� , �� Dart �� , � �� ? �� !

�� ?

mybb@mybb.ru (Anton) — Sun, 12 Jan 2020 21:09:01 +0300

��, �� , �� , �� "��" � "��" � �� , � �� , ��.

<�� >

mybb@mybb.ru (DRONWORK) — Sun, 12 Jan 2020 19:48:19 +0300

�� :

Yandex.Money: 410019916006605

WebMoney: R810205896507
Z256213664321

�� (RUR): 5336-6902-8336-6286
�� (UA): 5363-5426-0305-4934

�� 'FLUTTER-MASTER'

mybb@mybb.ru (DRONWORK) — Sun, 12 Jan 2020 19:36:52 +0300

�� , �� -�� Dart/Flutter.
�� , �� !
�� ...

�� (Dart/Flutter)

mybb@mybb.ru (DRONWORK) — Sun, 12 Jan 2020 19:11:48 +0300

FLUTTER.SU
��: Dart � Flutter
�� Flutter (Habr)
�� Dart 2.x + �� Flutter

To be continued ...

FLUTTER - MASTER

Flutter vs. Qt

������������ ����������� RadioListTile � ListView.builder

������������� � Dart

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