117 lines
3 KiB
Dart
117 lines
3 KiB
Dart
import 'dart:async';
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import 'package:flutter/cupertino.dart';
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import 'package:mnemo_cards/main.dart';
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import 'package:mnemo_cards_common/mnemo_cards_common.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class SharedPrefButton<T> extends StatefulWidget {
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final Function(T)? onClick;
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final String spKey;
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final T Function(T? current)? setOnTap;
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final bool Function(T? current)? shouldRebuild;
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final Widget Function(T? value, ValueSetter<T> setValue)? builder;
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SharedPrefButton({
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this.builder,
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required this.spKey,
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this.setOnTap,
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this.onClick,
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this.shouldRebuild,
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});
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SharedPrefButton.builder({
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this.builder,
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required this.spKey,
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this.setOnTap,
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this.onClick,
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this.shouldRebuild,
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});
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@override
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State<StatefulWidget> createState() => _SharedPrefButtonState<T>();
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}
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class _SharedPrefButtonState<T> extends State<SharedPrefButton<T>> {
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SharedPreferences? _sp;
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T? value;
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StreamSubscription? _streamSubscription;
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@override
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void dispose() {
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_streamSubscription?.cancel();
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_streamSubscription = null;
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super.dispose();
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}
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@override
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void initState() {
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super.initState();
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_sp = globalSharedPreferences;
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value = valueFromSp;
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_streamSubscription =
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Stream.periodic(const Duration(milliseconds: 500), (_) => valueFromSp)
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.distinct()
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.listen((v) {
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if (value != v) {
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value = v;
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if (mounted && widget.shouldRebuild?.call(value) != false) {
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setState(() {});
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}
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}
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});
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}
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T? get valueFromSp {
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if (T == bool) {
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return (_sp?.getBool(widget.spKey) ?? false).as<T?>();
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} else if (T == int) {
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return _sp?.getInt(widget.spKey).as<T?>();
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} else if (T == num || T == double) {
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return _sp?.getDouble(widget.spKey).as<T?>();
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} else if (T == String) {
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return _sp?.getString(widget.spKey).as<T?>();
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} else if (T == Iterable<String>) {
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return _sp?.getStringList(widget.spKey).as<T?>();
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}
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return null;
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}
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Future<void> setValue(T value) async {
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if (T == bool) {
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_sp?.setBool(widget.spKey, value as bool);
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} else if (T == int) {
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_sp?.setInt(widget.spKey, value as int);
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} else if (T == num || T == double) {
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_sp?.setDouble(widget.spKey, value as double);
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} else if (T == String) {
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_sp?.setString(widget.spKey, value as String);
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} else if (T == Iterable<String>) {
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_sp?.setStringList(widget.spKey, (value as Iterable<String>).toList());
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}
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}
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@override
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Widget build(BuildContext context) {
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return GestureDetector(
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behavior: HitTestBehavior.opaque,
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onTap: widget.setOnTap != null
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? () async {
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value = widget.setOnTap!.call(value);
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if (value != null) {
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_setValue(value!);
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}
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}
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: null,
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child: widget.builder?.call(value, _setValue),
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);
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}
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Future<void> _setValue(T value) async {
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await setValue(value!);
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if (widget.shouldRebuild?.call(value) != false) {
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setState(() {});
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}
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}
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}
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