Initial (redacted) commit.

app/lib/function_widgets/widget_settings_menu/widget_settings.dart

@@ -0,0 +1,79 @@
+// ignore_for_file: public_member_api_docs
+
+import 'package:flutter/material.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+import 'package:habitrack_app/function_widgets/widget_settings_menu/setting_entry.dart';
+
+class WidgetSettingsData {
+  WidgetSettingsData({required this.entries});
+
+  final Map<State, void Function(void Function())> listeners = {};
+  final Map<String, SettingEntry> entries;
+
+  void addListener(State toAdd, void Function(void Function()) updateCall) {
+    listeners[toAdd] = updateCall;
+  }
+
+  void removeListener(State toRemove) {
+    listeners.remove(toRemove);
+  }
+
+  void notify() {
+    for (final listener in listeners.keys) {
+      listeners[listener]!(() => ());
+    }
+  }
+
+  dynamic getValue(String key) {
+    return entries[key]?.getValue();
+  }
+
+  void setValue(String key, dynamic value) {
+    entries[key]?.setValue(value);
+    notify();
+  }
+
+  List<SettingEntry> asList() {
+    return entries.values.toList();
+  }
+}
+
+class WidgetSettings extends StatefulWidget {
+  const WidgetSettings({
+    required this.entries,
+    super.key,
+  });
+
+  final WidgetSettingsData entries;
+
+  @override
+  State<WidgetSettings> createState() => _WidgetSettingsState();
+}
+
+class _WidgetSettingsState extends State<WidgetSettings> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        iconTheme: IconThemeData(
+            color: Theme.of(context).colorScheme.onPrimaryContainer,),
+        backgroundColor: Theme.of(context).colorScheme.primaryContainer,
+        title: Text(
+          AppLocalizations.of(context)!.settingsHeader,
+          textScaler: const TextScaler.linear(1.5),
+          style: Theme.of(context).textTheme.bodyMedium!.copyWith(
+                color: Theme.of(context).colorScheme.onPrimaryContainer,
+                fontWeight: FontWeight.bold,
+                fontSize: 15,
+              ),
+        ),
+      ),
+      body: ColoredBox(
+        color: Theme.of(context).colorScheme.primaryContainer,
+        child: ListView(
+          children: widget.entries.asList(),
+        ),
+      ),
+    );
+  }
+}