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

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      showPerformanceOverlay: true,
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: const TiledTest(),
    );
  }
}

const int _kFilterImageSize = 64;

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

  @override
  State<TiledTest> createState() => _TiledTestState();
}

class _TiledTestState extends State<TiledTest> {
  int tileIndex = 0;
  int size = 10;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Spacer(),
              Expanded(
                flex: 4,
                child: Center(
                  child: AspectRatio(
                    aspectRatio: 1,
                    child: LayoutBuilder(
                      builder: (context, constraints) {
                        var scale =
                            (size * _kFilterImageSize) / constraints.maxWidth;
                        return Stack(
                          children: [
                            Image.asset('assets/images/kitty2.jpg'),
                            Image.asset(
                              'assets/tile/tile$tileIndex.png',
                              width: constraints.maxWidth,
                              height: constraints.maxHeight,
                              repeat: ImageRepeat.repeat,
                              alignment: Alignment.topLeft,
                              scale: scale,
                            ),
                          ],
                        );
                      },
                    ),
                  ),
                ),
              ),
              Expanded(
                child: Center(
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceAround,
                    children: [
                      Expanded(
                        child: FilledButton(
                          onPressed: () {
                            tileIndex = (tileIndex + 1) % 4;
                            setState(() {});
                          },
                          child: Text('Refresh'),
                        ),
                      ),
                      Expanded(
                        child: TextFormField(
                          keyboardType: TextInputType.number,
                          inputFormatters: [
                            FilteringTextInputFormatter.digitsOnly,
                          ],
                          decoration: InputDecoration(
                            labelText: 'Enter size',
                            border: OutlineInputBorder(),
                          ),
                          onChanged: (value) {
                            if (value.isNotEmpty) {
                              size = int.tryParse(value)!;
                              setState(() {});
                            }
                          },
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}