62 lines
1.3 KiB
Dart
62 lines
1.3 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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class ActivityAwareBuilder extends StatefulWidget {
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final DateTime? deadline;
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final Widget Function(bool) builder;
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const ActivityAwareBuilder({
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super.key,
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required this.builder,
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this.deadline,
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});
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@override
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State<ActivityAwareBuilder> createState() => ActivityAwareBuilderState();
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}
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class ActivityAwareBuilderState extends State<ActivityAwareBuilder> {
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Timer? _timer;
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@override
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void initState() {
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super.initState();
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_setTimer();
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}
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@override
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void didUpdateWidget(covariant ActivityAwareBuilder oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (oldWidget.deadline != widget.deadline) {
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_setTimer();
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}
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}
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@override
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void dispose() {
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_timer?.cancel();
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super.dispose();
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}
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void _setTimer() {
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final now = DateTime.now();
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final delay = widget.deadline?.difference(now);
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if (delay != null && delay > Duration.zero) {
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_timer?.cancel();
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_timer = Timer(delay, () {
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_timer?.cancel();
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_timer = null;
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if (mounted) setState(() {});
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});
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}
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}
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@override
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Widget build(BuildContext context) {
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return widget.builder(
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widget.deadline != null && widget.deadline!.isAfter(DateTime.now()),
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);
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}
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}
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