import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

List<String> etiketler = ["bu", "bir", "etiket", "droidim", "com"];
List<int> seciliListe = List.generate(5, (index) => index);

class _MyWidgetState extends State<MyWidget> {
  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Text("Lütfen etiketlerinizi  seçin"),
        for (String etiket in etiketler)
          FilterChip(
            label: Text(etiket),
            selected: seciliListe.contains(etiketler.indexOf(etiket)),
            onSelected: (value) {
              int etiketIndex = etiketler.indexOf(etiket);
              setState(() {
                if (value) {
                  seciliListe.add(etiketIndex);
                } else {
                  seciliListe.remove(etiketIndex);
                }
              });
            },
          )
      ],
    );
  }
}