35 lines
779 B
Dart
35 lines
779 B
Dart
|
import 'dart:async';
|
||
|
|
|
||
|
|
import 'package:flutter/material.dart';
|
||
|
|
|
||
|
|
class Debouncer {
|
||
|
|
final Duration _duration;
|
||
|
|
final ValueNotifier<bool> _debounceActiveNotifier = ValueNotifier(false);
|
||
|
|
Timer? _debounceTimer;
|
||
|
|
|
||
|
|
Debouncer(this._duration);
|
||
|
|
|
||
|
|
void run(Future<void> Function() fn) {
|
||
|
|
if (isActive()) {
|
||
|
|
_debounceTimer!.cancel();
|
||
|
|
}
|
||
|
|
_debounceTimer = Timer(_duration, () async {
|
||
|
|
await fn();
|
||
|
|
_debounceActiveNotifier.value = false;
|
||
|
|
});
|
||
|
|
_debounceActiveNotifier.value = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
void cancelDebounce() {
|
||
|
|
if (_debounceTimer != null) {
|
||
|
|
_debounceTimer!.cancel();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool isActive() => _debounceTimer != null && _debounceTimer!.isActive;
|
||
|
|
|
||
|
|
ValueNotifier<bool> get debounceActiveNotifier {
|
||
|
|
return _debounceActiveNotifier;
|
||
|
|
}
|
||
|
|
}
|