1. Import
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter_broadcast_receiver/flutter_broadcast_receiver.dart';
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import 'package:isar/isar.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:stadtbote/model/task_info.dart';
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import 'package:stadtbote/tools/colored_safe_area.dart';
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import 'package:stadtbote/model/status.dart';
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import 'package:stadtbote/tools/connection_status.dart';
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import 'tools/mqtt_core.dart';
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import 'content_views/main_page.dart';
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import 'content_views/utils/content_view_widget.dart';
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import 'content_views/utils/widget_stack.dart';
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import 'model/job.dart';
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import 'tools/constants.dart';
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import 'tools/util.dart';
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Future<void> main() async {
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WidgetsFlutterBinding.ensureInitialized();
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final dir = await getApplicationDocumentsDirectory();
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MyApp.isarInstance = await Isar.open([
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StatusSchema,
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JobSchema,
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TaskInfoSchema
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], directory: dir.path);
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runZonedGuarded(() {
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}, (error, stackTrace) {
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_traceUncaughtExceptions(error, stackTrace);
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});
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MqttCore.setup();
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runApp(const MyApp());
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}
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void _traceUncaughtExceptions(Object error, StackTrace stackTrace) {
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Util.logException('Ein Fehler ist aufgetreten: $error');
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Util.logException('Stack-Trace: $stackTrace');
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}
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class MyApp extends StatelessWidget {
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const MyApp({super.key});
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static late Isar isarInstance;
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'Stadtbote',
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theme: ThemeData(
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primarySwatch: Colors.blue,
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),
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home: const Main(),
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);
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}
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}
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class Main extends StatefulWidget {
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const Main({super.key});
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@override
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State<Main> createState() => _MainState();
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}
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class _MainState extends State<Main> {
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late ContentViewWidget _currentContent;
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late WidgetStack<ContentViewWidget> contentStack = WidgetStack();
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late Widget _currentTitleWidget;
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late Widget _leftIconButton;
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late Widget _rightIconButton;
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late bool _leftButtonVisible = false;
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late bool _rightButtonVisible = false;
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late Function _rightButtonOnPressed;
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late Function _leftButtonOnPressed;
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bool _initCompleted = false;
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final ValueNotifier<bool> _connectionLostValueNotifier = ValueNotifier<bool>(false);
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@override
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void initState() {
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super.initState();
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WidgetsBinding.instance.addPostFrameCallback((_) async {
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_initMessages();
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_currentContent = const MainPage();
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var headerInfo = await _currentContent.getHeaderInfo(context);
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_currentTitleWidget = headerInfo.titleWidget;
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_leftButtonVisible = false;
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_leftIconButton = const Icon(Icons.arrow_back, size: 20.0, color: Colors.white);
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_leftButtonOnPressed = () {
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_popContentView();
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};
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_rightButtonVisible = headerInfo.rightButtonVisible;
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_rightButtonOnPressed = headerInfo.rightButtonOnPressed;
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if (headerInfo.rightButtonEnabled) {
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_rightIconButton = await headerInfo.rightButtonImage as Widget;
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}
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_initCompleted = true;
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setState(() {});
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});
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}
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@override
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void dispose() {
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super.dispose();
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//_subscription.cancel();
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}
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@override
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Widget build(BuildContext context) {
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if (!_initCompleted) {
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return Util.getWaitWidget(context);
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}
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return ColoredSafeArea(
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key: GlobalKey(),
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child: WillPopScope(
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onWillPop: () async {
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return false;
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},
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child: Scaffold(
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appBar: PreferredSize(
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preferredSize: const Size.fromHeight(70),
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child: ColoredSafeArea(
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key: const Key("appBar"),
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child: SizedBox(
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height: 80,
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child: Padding(
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padding: const EdgeInsets.all(8),
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child: Stack(
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alignment: Alignment.center,
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children: [
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Visibility(
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visible: _leftButtonVisible,
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child: Container(
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width: 40,
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height: 40,
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decoration: const BoxDecoration(
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shape: BoxShape.circle,
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color: Colors.white,
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),
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child: FittedBox(
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child: GestureDetector(
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onTap: () async {
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_leftButtonOnPressed();
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},
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child: CircleAvatar(
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radius: 15,
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child: Padding(padding: const EdgeInsets.all(1.0), child: _leftIconButton),
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),
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),
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),
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),
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),
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Visibility(
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visible: _rightButtonVisible,
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child: Container(
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width: 40,
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height: 40,
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decoration: const BoxDecoration(
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shape: BoxShape.circle,
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color: Colors.red,
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),
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child: FittedBox(
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child: GestureDetector(
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onTap: () async {
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_rightButtonOnPressed();
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},
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child: CircleAvatar(
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radius: 15,
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child: Padding(padding: const EdgeInsets.all(1.0), child: _rightIconButton),
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),
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),
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),
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),
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),
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],
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),
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SizedBox(
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height: 60,
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width: 300,
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child: Center(
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heightFactor: 1,
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child: _currentTitleWidget),
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),
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],
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),
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),
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)),
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),
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body: Column(
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children: [
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ValueListenableBuilder<bool>(
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valueListenable: _connectionLostValueNotifier,
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builder: (context, value, child) {
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return Visibility(
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visible: value,
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child: Container(
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width: MediaQuery.of(context).size.width,
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height: 30,
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color: Colors.red,
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child: const Center(
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child: Text("*** OFFLINE ***",
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style: TextStyle(
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color: Colors.white,
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fontSize: 15.0,
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),),
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),
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),
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);
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},
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),
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Expanded(child: _currentContent),
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],
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),// This trailing comma makes auto-formatting nicer for build methods.
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),
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),
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);
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}
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void _initMessages() {
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BroadcastReceiver().subscribe<ContentViewWidget>(Constants.messageTopicPushContentView, (ContentViewWidget widget) {
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_pushContentView(widget);
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});
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BroadcastReceiver().subscribe<ContentViewWidget>(Constants.messageTopicPopContentView, (ContentViewWidget widget) {
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_popContentView();
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});
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BroadcastReceiver().subscribe<ContentViewWidget>(Constants.messageTopicReplaceContentView, (ContentViewWidget widget) {
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_replaceContentView(widget);
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});
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BroadcastReceiver().subscribe<bool>(Constants.messageTopicHideRightButton, (hideButton) {
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_hideRightButton(hideButton);
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});
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BroadcastReceiver().subscribe<ConnectionStatus>(Constants.messageTopicConnectionStatusChanged, (ConnectionStatus connectionStatus) {
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_connectionStatusChanged(connectionStatus);
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});
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}
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void _replaceContentView(ContentViewWidget widget) async {
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Future.delayed(const Duration(seconds: 0), () async {
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contentStack.clear();
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setState(() {
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_currentContent = widget;
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});
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var headerInfo = await _currentContent.getHeaderInfo(context);
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_currentTitleWidget = headerInfo.titleWidget;
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_rightButtonVisible = headerInfo.rightButtonVisible;
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_rightButtonOnPressed = headerInfo.rightButtonOnPressed;
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if (headerInfo.rightButtonEnabled) {
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_rightIconButton = await headerInfo.rightButtonImage as Widget;
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}
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_leftButtonVisible = false;
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setState(() {});
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});
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}
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void _popContentView() {
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Future.delayed(const Duration(seconds: 0), () async {
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var previousContentView = contentStack.pop();
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_currentContent = previousContentView;
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var headerInfo = await _currentContent.getHeaderInfo(context);
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_currentTitleWidget = headerInfo.titleWidget;
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_rightButtonVisible = headerInfo.rightButtonVisible;
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_rightButtonOnPressed = headerInfo.rightButtonOnPressed;
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if (headerInfo.rightButtonEnabled) {
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_rightIconButton = await headerInfo.rightButtonImage as Widget;
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}
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if (contentStack.isEmpty) {
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_leftButtonVisible = false;
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}
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setState(() {});
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});
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}
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void _pushContentView(ContentViewWidget widget) {
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Future.delayed(const Duration(seconds: 0), () async {
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contentStack.push(_currentContent);
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_currentContent = widget;
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var headerInfo = await _currentContent.getHeaderInfo(context);
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_currentTitleWidget = headerInfo.titleWidget;
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_rightButtonVisible = headerInfo.rightButtonVisible;
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_rightButtonOnPressed = headerInfo.rightButtonOnPressed;
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if (headerInfo.rightButtonEnabled) {
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_rightIconButton = await headerInfo.rightButtonImage as Widget;
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}
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_leftButtonVisible = true;
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setState(() {});
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});
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}
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void _hideRightButton(bool hideButton) {
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setState(() {
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_rightButtonVisible = !hideButton;
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});
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}
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void _connectionStatusChanged(ConnectionStatus connectionStatus) {
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_connectionLostValueNotifier.value = connectionStatus.status == ConnectionStatusEnum.notConnected;
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}
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}
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