54 lines
1.0 KiB
Dart
54 lines
1.0 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 Debounce {
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final bool loading;
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final void Function() callback;
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void call() => callback();
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// void dispose() {}
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const Debounce({
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@required this.loading,
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@required this.callback,
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});
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}
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/// will run `callback()` after debounce hook hasn't been called for the
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/// specified `delayDuration`
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Debounce useDebounce(
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Future<Null> Function() callback, [
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Duration delayDuration = const Duration(seconds: 1),
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]) {
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final loading = useState(false);
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final timerHandle = useRef<Timer>(null);
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cancel() {
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timerHandle.current?.cancel();
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loading.value = false;
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}
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useEffect(() => () => timerHandle.current?.cancel(), []);
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start() {
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timerHandle.current = Timer(delayDuration, () async {
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loading.value = true;
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await callback();
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cancel();
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});
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}
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return Debounce(
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loading: loading.value,
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callback: () {
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cancel();
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start();
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},
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);
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}
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