mirror of
https://github.com/vodemn/m3_lightmeter.git
synced 2024-10-19 06:40:59 +00:00
76 lines
2.1 KiB
Dart
76 lines
2.1 KiB
Dart
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import 'package:flutter/material.dart';
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enum MeteringScreenLayoutFeature { extremeExposurePairs, reciprocity }
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class MeteringScreenLayoutProvider extends StatefulWidget {
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final Widget child;
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const MeteringScreenLayoutProvider({required this.child, super.key});
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static MeteringScreenLayoutProviderState of(BuildContext context) {
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return context.findAncestorStateOfType<MeteringScreenLayoutProviderState>()!;
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}
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@override
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State<MeteringScreenLayoutProvider> createState() => MeteringScreenLayoutProviderState();
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}
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class MeteringScreenLayoutProviderState extends State<MeteringScreenLayoutProvider> {
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final Map<MeteringScreenLayoutFeature, bool> _features = {
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MeteringScreenLayoutFeature.extremeExposurePairs: true,
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MeteringScreenLayoutFeature.reciprocity: true,
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};
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@override
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Widget build(BuildContext context) {
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return MeteringScreenLayout(
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features: _features,
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child: widget.child,
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);
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}
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void setFeature(MeteringScreenLayoutFeature feature, {required bool enabled}) {
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setState(() {
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_features.update(
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feature,
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(_) => enabled,
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ifAbsent: () => enabled,
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);
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});
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}
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}
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class MeteringScreenLayout extends InheritedModel<MeteringScreenLayoutFeature> {
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final Map<MeteringScreenLayoutFeature, bool> features;
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const MeteringScreenLayout({
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required this.features,
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required super.child,
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super.key,
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});
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static bool of(BuildContext context, MeteringScreenLayoutFeature feature, {bool listen = true}) {
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if (listen) {
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return context.dependOnInheritedWidgetOfExactType<MeteringScreenLayout>()!.features[feature]!;
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} else {
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return context.findAncestorWidgetOfExactType<MeteringScreenLayout>()!.features[feature]!;
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}
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}
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@override
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bool updateShouldNotify(MeteringScreenLayout oldWidget) => true;
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@override
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bool updateShouldNotifyDependent(
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MeteringScreenLayout oldWidget,
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Set<MeteringScreenLayoutFeature> dependencies,
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) {
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for (final dependecy in dependencies) {
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if (oldWidget.features[dependecy] != features[dependecy]) {
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return true;
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}
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}
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return false;
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}
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}
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