54 lines
1.4 KiB
Dart
54 lines
1.4 KiB
Dart
import 'dart:async';
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import 'package:aves/model/settings/settings.dart';
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import 'package:aves/utils/durations.dart';
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import 'package:aves/widgets/common/action_delegates/feedback.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:overlay_support/overlay_support.dart';
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class DoubleBackPopScope extends StatefulWidget {
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final Widget child;
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const DoubleBackPopScope({
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@required this.child,
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});
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@override
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_DoubleBackPopScopeState createState() => _DoubleBackPopScopeState();
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}
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class _DoubleBackPopScopeState extends State<DoubleBackPopScope> with FeedbackMixin {
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bool _backOnce = false;
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Timer _backTimer;
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@override
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void dispose() {
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_stopBackTimer();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return WillPopScope(
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onWillPop: () {
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if (!Navigator.canPop(context) && settings.mustBackTwiceToExit && !_backOnce) {
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_backOnce = true;
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_stopBackTimer();
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_backTimer = Timer(Durations.doubleBackTimerDelay, () => _backOnce = false);
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toast(
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'Tap “back” again to exit.',
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duration: Durations.doubleBackTimerDelay,
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);
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return SynchronousFuture(false);
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}
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return SynchronousFuture(true);
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},
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child: widget.child,
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);
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}
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void _stopBackTimer() {
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_backTimer?.cancel();
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}
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}
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