flutter_week_flutter_part.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:flutter/material.dart';

void main() {
  sayiYazdir(sayi1: 5);

  runApp(BenimWidgetim());
}

class BenimWidgetim extends StatelessWidget {
  Widget build(BuildContext baglam) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: DurumluWidget(),
    );
  }
}

class DurumluWidget extends StatefulWidget {
  State createState() {
    return DurumWidgetininDurumu();
  }
}

class DurumWidgetininDurumu extends State {
  // YAGNI
  int sayac = 0;

  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("İlk Flutter Uygulamam")),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Row(
            children: [
              Center(),
              const Text("Artı butonuna şu kadar bastınız:"),
              Text(
                "$sayac",
                style: Theme.of(context).textTheme.headline4,
              ),
            ],
          ),
          const Center(
            child: Text("Artı butonuna şu kadar bastınız:"),
          ),
          Text(
            "$sayac",
            style: Theme.of(context).textTheme.headline1,
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          print("İkona tıklandı");

          print(sayac);

          setState(() {
            sayac++;
          });
        },
        child: Icon(Icons.add),
      ),
    );
  }
}

void sayiYazdir({required int sayi1, int sayi2 = 4}) {
  print("Merhaba Dünya!");
}