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