2022-08-19 07:30:37 +00:00
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import 'dart:async';
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import 'package:flutter/material.dart';
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class Debouncer {
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2022-08-19 09:06:25 +00:00
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final Duration _duration;
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2022-08-22 08:26:01 +00:00
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final ValueNotifier<bool> _debounceActiveNotifier = ValueNotifier(false);
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2022-09-20 12:13:15 +00:00
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Timer? _debounceTimer;
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2022-08-22 09:14:52 +00:00
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2022-08-23 11:02:00 +00:00
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Debouncer(this._duration);
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2022-08-19 07:30:37 +00:00
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2022-08-22 08:26:01 +00:00
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void run(Future<void> Function() fn) {
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if (isActive()) {
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2022-09-20 12:13:15 +00:00
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_debounceTimer!.cancel();
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2022-08-19 07:30:37 +00:00
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}
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2022-08-22 08:26:01 +00:00
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_debounceTimer = Timer(_duration, () async {
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await fn();
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_debounceActiveNotifier.value = false;
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});
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_debounceActiveNotifier.value = true;
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2022-08-19 07:30:37 +00:00
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}
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2022-08-22 09:14:52 +00:00
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void cancelDebounce() {
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2022-08-19 09:16:26 +00:00
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if (_debounceTimer != null) {
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2022-09-20 12:13:15 +00:00
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_debounceTimer!.cancel();
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2022-08-19 07:30:37 +00:00
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}
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}
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2022-08-19 09:06:25 +00:00
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2022-09-20 12:13:15 +00:00
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bool isActive() => _debounceTimer != null && _debounceTimer!.isActive;
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2022-08-19 09:16:26 +00:00
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2022-08-22 08:26:01 +00:00
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ValueNotifier<bool> get debounceActiveNotifier {
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return _debounceActiveNotifier;
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2022-08-20 10:08:36 +00:00
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}
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2022-08-19 07:30:37 +00:00
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}
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