Manual side menu

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  String _text = 'test 1';

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
        appBar: AppBar(
          // Here we take the value from the MyHomePage object that was created by
          // the App.build method, and use it to set our appbar title.
          title: Text(widget.title),
        ),
        body: Material(
          child: Row(
            children: [
              Container(
                width: 50,
                decoration: const BoxDecoration(
                  color: Colors.red,
                ),
                child: Column(
                  children: <Widget>[
                    Container(
                      height: 50,
                      decoration: const BoxDecoration(
                        color: Colors.blue,
                      ),
                      child: const Center(
                        child: Text(
                          'Side Menu',
                          style: TextStyle(
                            color: Colors.white,
                            fontSize: 20,
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                      ),
                    ),
                    ListTile(
                      title: const Text('Home'),
                      onTap: () {
                        // navigate to home screen
                        setState(() {
                          _text = 'test 1';
                        });
                      },
                    ),
                    ListTile(
                      title: const Text('Profile'),
                      onTap: () {
                        setState(() {
                          _text = 'test 2';
                        });
                        // navigate to profile screen
                      },
                    ),
                    Material(
                      child: InkWell(
                        splashColor: Colors.blue,
                        hoverColor: Colors.red,
                        onTap: () {
                          setState(() {
                            _text = 'test 5';
                          });
                          // navigate to settings screen
                        },
                        child: Container(
                            color: Colors.blue, child: const Text('Inkwell')),
                      ),
                    ),
                    ListTile(
                      splashColor: Colors.blue,
                      selectedColor: Colors.red,
                      hoverColor: Colors.red,
                      title: const Text('Settings'),
                      onTap: () {
                        setState(() {
                          _text = 'test 3';
                        });
                        // navigate to settings screen
                      },
                    ),
                  ],
                ),
              ),
              SizedBox(
                height: MediaQuery.of(context).size.height,
                width: MediaQuery.of(context).size.width - 50,
                child: Center(
                  child: Text(_text),
                ),
              )
            ],
          ),
        ));
  }
}