79 lines
2.2 KiB
Dart
79 lines
2.2 KiB
Dart
/*
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* Copyright (c) 2024-2026 Fabian Freund.
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*
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* This file is part of WebLibre
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* (see https://weblibre.eu).
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import 'package:flutter/widgets.dart';
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import 'package:flutter_hooks/flutter_hooks.dart';
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import 'package:weblibre/utils/sampled_value_notifier.dart';
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/// A custom hook that creates a sampled ValueNotifier from another ValueNotifier
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ValueNotifier<T> useSampledValueNotifier<T>({
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required ValueNotifier<T> source,
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required Duration sampleDuration,
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}) {
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return use(
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_SampledValueNotifierHook<T>(
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source: source,
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sampleDuration: sampleDuration,
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),
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);
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}
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/// Hook implementation for sampled ValueNotifier
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class _SampledValueNotifierHook<T> extends Hook<ValueNotifier<T>> {
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final ValueNotifier<T> source;
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final Duration sampleDuration;
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const _SampledValueNotifierHook({
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required this.source,
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required this.sampleDuration,
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});
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@override
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_SampledValueNotifierHookState<T> createState() =>
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_SampledValueNotifierHookState<T>();
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}
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class _SampledValueNotifierHookState<T>
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extends HookState<ValueNotifier<T>, _SampledValueNotifierHook<T>> {
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late SampledValueNotifier<T> _sampledNotifier;
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@override
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void initHook() {
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super.initHook();
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_sampledNotifier = SampledValueNotifier<T>(
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source: hook.source,
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sampleDuration: hook.sampleDuration,
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);
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}
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@override
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ValueNotifier<T> build(BuildContext context) {
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return _sampledNotifier;
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}
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@override
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void dispose() {
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_sampledNotifier.dispose();
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super.dispose();
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}
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@override
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String get debugLabel => 'useSampledValueNotifier<$T>';
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}
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