44 lines
1.1 KiB
Dart
44 lines
1.1 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter_hooks/flutter_hooks.dart';
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import 'ref.dart';
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class DelayedLoading {
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final bool pending;
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final bool loading;
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final void Function() start;
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final void Function() cancel;
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const DelayedLoading({
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@required this.pending,
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@required this.loading,
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@required this.start,
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@required this.cancel,
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});
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}
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/// When loading is [.start()]ed, it goes into a pending state
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/// and loading is triggered after [delayDuration].
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/// Everything can be reset with [.cancel()]
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DelayedLoading useDelayedLoading(Duration delayDuration) {
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final loading = useState(false);
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final pending = useState(false);
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final timerHandle = useRef<Timer>(null);
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return DelayedLoading(
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loading: loading.value,
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pending: pending.value,
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start: () {
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timerHandle.current = Timer(delayDuration, () => loading.value = true);
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pending.value = true;
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},
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cancel: () {
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timerHandle.current?.cancel();
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pending.value = false;
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loading.value = false;
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},
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);
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}
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