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

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    debugPaintSizeEnabled = true;
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        useMaterial3: true,
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            AppBar(
              actions: <Widget>[
                IconButton(
                  tooltip: "favorite",
                  icon: const Icon(Icons.star),
                  onPressed: () {},
                ),
                IconButton(
                  tooltip: "copy color",
                  icon: const Icon(Icons.star),
                  onPressed: () {},
                ),
              ],
              title: Container(
                color: Colors.orange,
                child: const SizedBox(
                    width: double.infinity, child: Text("center: true")),
              ),
              centerTitle: true,
            ),
            AppBar(
              actions: <Widget>[
                IconButton(
                  tooltip: "favorite",
                  icon: const Icon(Icons.star),
                  onPressed: () {},
                ),
                IconButton(
                  tooltip: "copy color",
                  icon: const Icon(Icons.star),
                  onPressed: () {},
                ),
              ],
              title: Container(
                color: Colors.lightGreen,
                child: const SizedBox(
                    width: double.infinity, child: Text("center: false")),
              ),
              centerTitle: false,
            ),
          ],
        ),
      ),
    );
  }
}