OpenMediacenterMobileFlutter/lib/logincontext.dart

import 'package:flutter/material.dart';

class LoginContainer extends StatefulWidget {
  const LoginContainer({Key? key, required this.child}) : super(key: key);
  final Widget child;

  @override
  _LoginContainerState createState() => _LoginContainerState();
}

class _LoginContainerState extends State<LoginContainer> {
  bool loggedIn = false;

  @override
  Widget build(BuildContext context) {
    return LoginContext(
      LoggedIn: loggedIn,
      child: widget.child,
      onLoggin: (bool login) {
        if (loggedIn != login) {
          setState(() {
            loggedIn = login;
          });
        }
      },
    );
  }
}

class LoginContext extends InheritedWidget {
  const LoginContext(
      {Key? key,
      required Widget child,
      required this.LoggedIn,
      required this.onLoggin})
      : super(key: key, child: child);

  final bool LoggedIn;
  final void Function(bool) onLoggin;

  setLoggedIn(bool login) {
    onLoggin(login);
  }

  static LoginContext of(BuildContext context) {
    final LoginContext? result =
        context.dependOnInheritedWidgetOfExactType<LoginContext>();
    assert(result != null, 'No LoginContext found in context');
    return result!;
  }

  @override
  bool updateShouldNotify(LoginContext old) {
    return LoggedIn != old.LoggedIn;
  }
}