m3_lightmeter/lib/providers/metering_screen_layout_provider.dart

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import 'package:flutter/material.dart';
import 'package:lightmeter/data/models/metering_screen_layout_config.dart';
import 'package:lightmeter/data/shared_prefs_service.dart';
import 'package:provider/provider.dart';
class MeteringScreenLayoutProvider extends StatefulWidget {
final Widget child;
const MeteringScreenLayoutProvider({required this.child, super.key});
static MeteringScreenLayoutProviderState of(BuildContext context) {
return context.findAncestorStateOfType<MeteringScreenLayoutProviderState>()!;
}
@override
State<MeteringScreenLayoutProvider> createState() => MeteringScreenLayoutProviderState();
}
class MeteringScreenLayoutProviderState extends State<MeteringScreenLayoutProvider> {
late final MeteringScreenLayoutConfig _config =
context.read<UserPreferencesService>().meteringScreenLayout;
@override
Widget build(BuildContext context) {
return MeteringScreenLayout(
config: MeteringScreenLayoutConfig.from(_config),
child: widget.child,
);
}
void updateFeatures(MeteringScreenLayoutConfig config) {
setState(() {
config.forEach((key, value) {
_config.update(
key,
(_) => value,
ifAbsent: () => value,
);
});
});
context.read<UserPreferencesService>().meteringScreenLayout = _config;
}
}
class MeteringScreenLayout extends InheritedModel<MeteringScreenLayoutFeature> {
final MeteringScreenLayoutConfig config;
const MeteringScreenLayout({
required this.config,
required super.child,
super.key,
});
static MeteringScreenLayoutConfig of(BuildContext context, {bool listen = true}) {
if (listen) {
return context.dependOnInheritedWidgetOfExactType<MeteringScreenLayout>()!.config;
} else {
return context.findAncestorWidgetOfExactType<MeteringScreenLayout>()!.config;
}
}
static bool featureStatusOf(BuildContext context, MeteringScreenLayoutFeature feature) {
return InheritedModel.inheritFrom<MeteringScreenLayout>(context, aspect: feature)!
.config[feature]!;
}
@override
bool updateShouldNotify(MeteringScreenLayout oldWidget) => true;
@override
bool updateShouldNotifyDependent(
MeteringScreenLayout oldWidget,
Set<MeteringScreenLayoutFeature> dependencies,
) {
for (final dependecy in dependencies) {
if (oldWidget.config[dependecy] != config[dependecy]) {
return true;
}
}
return false;
}
}