Nested widget POC

main.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

final textValueProvider = StateProvider<String>((_) => "OPT_1");
final isNestedProvider = StateProvider<bool>((_) => false);

void main() {
  runApp(ProviderScope(child: MyApp()));
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home:  MyHomePage(),
    );
  }
}

class MyHomePage extends ConsumerWidget {
  void changeMode(StateController<bool> isNestedController) {
    isNestedController.state = !isNestedController.state;
  }

  void changeText(StateController<String> textController) {
    textController.state = "Rebuilt!!!";
  }

  Widget _nestedOption() {
    return NestedWidget(
      children: [
        (child) {
          print("Nested widget rebuilt!");
          return Padding(
            padding: const EdgeInsets.all(1),
            child: child,
          );
        }
      ],
      child: Consumer(builder: (context, ref, _) {
        final text = ref.watch(textValueProvider);
        return Text(text);
      }),
    );
  }

  Widget _normalOption() {
    return CustomPaddingForLog(
      child: Consumer(builder: (context, ref, _) {
        final text = ref.watch(textValueProvider);
        return Text(text);
      }),
    );
  }

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final isNested = ref.watch(isNestedProvider);
    final isNestedController = ref.read(isNestedProvider.notifier);
    final textController = ref.read(textValueProvider.notifier);

    print("PARENT WIDGET!!!!!");
    return Scaffold(
      appBar: AppBar(
        title: const Text("NESTED TEST"),
      ),
      body: Column(
        children: [
          Expanded(
            child: isNested ? _nestedOption() : _normalOption(),
          ),
          Row(
            children: [
              ElevatedButton(
                onPressed: () => changeText(textController),
                child: const Text("Rebuilt"),
              ),
              ElevatedButton(
                onPressed: () => changeMode(isNestedController),
                child: const Text("Change mode"),
              ),
            ],
          ),
        ],
      ),
    );
  }
}

class CustomPaddingForLog extends StatelessWidget {
  const CustomPaddingForLog({required this.child});

  final Widget child;

  @override
  Widget build(BuildContext context) {
    print("Rebuilt in normal");
    return Padding(
      padding: const EdgeInsets.all(1),
      child: child,
    );
  }
}

typedef SingleChildWidgetConstructor = Widget Function(Widget child);

class NestedWidget extends StatelessWidget {
  const NestedWidget({
    Key? key,
    required this.children,
    required this.child,
  }) : super(key: key);
  final List<SingleChildWidgetConstructor> children;
  final Widget child;
  @override
  Widget build(BuildContext context) {
    Widget nestedChild = child;
    for (final constructor in children.reversed) {
      return constructor(nestedChild);
    }
    return nestedChild;
  }
}