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Code Issues Projects Releases Wiki Activity

Listen to WebSocket close events

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This commit is contained in:
Pierre HUBERT
2020-04-18 13:48:21 +02:00
parent de3cd9c7b7
commit 36f89a9a53
6 changed files with 74 additions and 3 deletions
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7
lib/ui/widgets/init_widget.dart
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@ -1,5 +1,7 @@
import 'package:comunic/helpers/events_helper.dart';
import 'package:comunic/helpers/websocket_helper.dart';
import 'package:comunic/ui/routes/main_route.dart';
import 'package:comunic/ui/widgets/safe_state.dart';
import 'package:comunic/utils/intl_utils.dart';
import 'package:flutter/material.dart';
@ -17,7 +19,7 @@ class InitializeWidget extends StatefulWidget {
_InitializeWidgetState createState() => _InitializeWidgetState();
}
class _InitializeWidgetState extends State<InitializeWidget> {
class _InitializeWidgetState extends SafeState<InitializeWidget> {
bool _error = false;
@override
@ -25,6 +27,9 @@ class _InitializeWidgetState extends State<InitializeWidget> {
_tryConnect();
super.initState();
// Listen to WebSocket close event
super.listen<WSClosedEvent>((e) => _tryConnect());
}
/// Try to connect to server

20
lib/ui/widgets/safe_state.dart
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@ -1,3 +1,6 @@
import 'dart:async';
import 'package:comunic/helpers/events_helper.dart';
import 'package:flutter/material.dart';
/// Little State hack to avoid issues
@ -5,9 +8,26 @@ import 'package:flutter/material.dart';
/// @author Pierre HUBERT
abstract class SafeState<T extends StatefulWidget> extends State<T> {
final _subscriptions = List<StreamSubscription>();
@override
void dispose() {
// Close subscriptions
_subscriptions.forEach((f) => f.cancel());
super.dispose();
}
@override
void setState(fn) {
if(mounted)
super.setState(fn);
}
/// Register to a new subscription
@protected
void listen<T>(void onEvent(T event)) {
_subscriptions.add(EventsHelper.on<T>(onEvent));
}
}