Курсор не смещается вперёд

[Dimous]

Привет, Сергей!

flutter doctor -v

[√] Flutter (Channel master, 1.22.0-10.0.pre.176, on Microsoft Windows [Version 10.0.19041.508], locale ru-RU)
• Flutter version 1.22.0-10.0.pre.176 at C:\Users\kasim\Documents\flutter
• Framework revision 96ca0e272b (6 hours ago), 2020-09-15 09:02:04 +0100
• Engine revision 7e962ba911
• Dart version 2.10.0 (build 2.10.0-124.0.dev)

описание проблемы

Установил на TextFormField маску телефонного номера из примера. Курсор автоматически не смещается вперёд, а при вводе пробела содержимое очищается.

https://dump.video/i/xmeNBp.mp4

[siqwin]

Какое используется устройство и клавиатура?
Если запустить пример приложения, то во всех полях наблюдается такое поведение, или только в некоторых?

[Dimous]

Привет!
Устройство Samsung A51. Клавиатура девайсная.

Нашёл причину. Ввод обнуляется при ререндеринге. Даже если он был вызван изменением состояния соседнего виджета.

Это семпл, на котором я проверял. В нём много лишнего, это из проекта, на котором я всё проверяю.

Воспроизвести можно: 1. начать ввод в маскируемое поле; 2. нажать на экшон-баттон; 3. продолжить ввод.

import 'dart:math';

import 'package:firebase_analytics/firebase_analytics.dart';
import 'package:flutter/material.dart';
import 'package:flutter_matomo/flutter_matomo.dart';
import 'package:mask_text_input_formatter/mask_text_input_formatter.dart';

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

///const URL = 'https://topkek.matomo.cloud/matomo.php';
const SITE_ID = 1;
const URL = 'http://10.0.2.2/matomo/matomo.php';

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  String _matomoStatus = 'Starting ...';

  static final random = Random();
  static final analytics = FirebaseAnalytics();

  @override
  void initState() {
    _initMatomo().then((void x) {
      print("matomo is ready");
    }).catchError((e) {
      print(e.toString());
    });

    super.initState();
  }

  Future<void> _initMatomo() async {
    _matomoStatus = await FlutterMatomo.initializeTracker(URL, SITE_ID);
    setState(() {});

    Future.delayed(Duration(seconds: 4), () async {
      _matomoStatus =
          await FlutterMatomo.trackScreenWithName("Экран", "Просмотр экрана");
      setState(() {});
    });

    Future.delayed(Duration(seconds: 8), () async {
      _matomoStatus =
          await FlutterMatomo.trackEventWithName("Источник", "Цель", "Тап");
      setState(() {});
    });

    Future.delayed(Duration(seconds: 12), () async {
      _matomoStatus = await FlutterMatomo.trackGoal(1);
      setState(() {});
    });

    Future.delayed(Duration(seconds: 16), () async {
      _matomoStatus = await FlutterMatomo
          .dispatchEvents(); // должно диспетчиться автоматом каждые 30 секунд (в нативе)
      setState(() {});
    });
  }

  void _incrementCounter() {
    //analytics.setUserProperty(name: null, value: null);
    analytics.logEvent(
      name: "custom_error",
      parameters: {
        "type": random.nextInt(100),
        "object": [
          "listing",
          "search",
          "detailed",
          "pickup",
          "return",
          "dump"
        ][random.nextInt(5)]
      },
    );

    analytics.logEvent(
      name: "top_kek",
      parameters: {
        "Тест": "топ кек азаза",
        "top": "YXYjLe9d3zRbA155gEMX7CB8bLIdlP8mnVPQFxQrpDN5TbeyiZ"
            .substring(0, random.nextInt(49)),
        "kek": "YXYjLe9d3zRbA155gEMX7CB8bLIdlP8mnVPQFxQrpDN5TbeyiZ"
            .substring(0, random.nextInt(49))
      },
    );

    analytics.logEvent(name: "Критическая_ошибка_в_ДНК");

    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @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(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(_matomoStatus),
            TextFormField(
              inputFormatters: [
                MaskTextInputFormatter(
                  mask: "+# (###) ###-##-##",
                )
              ],
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

[urusai88]

Проблема в initialText

[Dimous]

Спасибо за наводку!