L4 EXAM - main.app

l4_exam_app.dart

import 'package:flutter/material.dart';

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


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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Exam App',
      theme: ThemeData(
        primarySwatch: Colors.blue
      ),
      home: const Ekran()
    );
  }
}

class Ekran extends StatefulWidget {
  const Ekran({super.key});

  @override
  State<Ekran> createState() => _EkranState();
}

class _EkranState extends State<Ekran> {

  String _text = "Unknown";

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Exam APP"),
        backgroundColor: Colors.blue,
        actions: [
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: IconButton(
              onPressed: () {
                setState(() {
                  _text = "Unknown";
                });
              },
              icon: const Icon(Icons.refresh),
            ),
          )
        ],
      ),
      body: Container(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
                
            Text(_text,
              style: const TextStyle(
                fontSize: 24,
                fontWeight: FontWeight.bold
              ),
            ),
                
            const Divider(
              height: 64,
              indent: 16,
              endIndent: 16,
            ),
                
            AppButton(
              text: "Button 1",
              color: Colors.orange,
              onPressed: () {
                setState(() {
                  _text = "Button 1 Klike";
                });
              },
            ),
                
            const SizedBox(height: 16,),
                
            AppButton(
              text: "Button 2",
              color: Colors.blue,
              onPressed: () {
                setState(() {
                  _text = "Button 2 Klike";
                });
              },
            ),
                
            const SizedBox(height: 16,),
                
            AppButton(
              text: "Button 1",
              color: Colors.red,
              onPressed: () {
                setState(() {
                  _text = "Button 3 Klike";
                });
              },
            )
          ],
        ),
      ),
    );
  }
}

class AppButton extends StatelessWidget {
  const AppButton({
    super.key, required this.text, required this.onPressed, required this.color,
  });

  final String text;
  final VoidCallback onPressed;
  final Color color;

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: double.infinity,
      height: 56,
      child: ElevatedButton(
        style:  ElevatedButton.styleFrom(
          foregroundColor: color == Colors.white ? Colors.black : Colors.white,
          backgroundColor: color
        ),
        onPressed: onPressed,
        child: Text(text,
          style: const TextStyle(
            fontSize: 18,
            fontWeight: FontWeight.bold
          ),
        )
      )
    );
  }
}