import 'package:flutter/material.dart';

class DinamikTabbar3 extends StatefulWidget {
  const DinamikTabbar3({Key? key}) : super(key: key);

  @override
  State<DinamikTabbar3> createState() => _DinamikTabbar3State();
}

class KategoriModel{
  int? id;
  String? kategoriAd; // YİYECEKLER , İÇECEKLER
}

class UrunModel{
  int? id;
  int? kategoriId;
  String? urunAd; // AYRAN KOLA DÖNER PİZZA
}

class _DinamikTabbar3State extends State<DinamikTabbar3> {
  List<KategoriModel> listKategori=[];
  List<UrunModel> listUrun=[];

  List<Widget> listTabWidget=[];
  List<Widget> listUrunWidget=[];
  List<Widget> listViewWidget=[];

  void kategoriEkle(int id,String katAd){
    KategoriModel kat=new KategoriModel();
    kat.id=id;
    kat.kategoriAd=katAd;
    listKategori.add(kat);
  }
  void urunEkle(int kategoriId,int urunId,String urunAd){
    UrunModel urun=new UrunModel();
    urun.id=urunId;
    urun.kategoriId=kategoriId;
    urun.urunAd=urunAd;
    listUrun.add(urun);
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    kategoriEkle(1,"İçecekler");
    kategoriEkle(2,"Yiyecekler");
    urunEkle(1,1,"Ayran1");
    urunEkle(1,2,"Kola");
    urunEkle(2,3,"Döner");
    urunEkle(2,4,"Pizza");

    listKategori.forEach((kategori) {
      Widget tab=Tab(child: Text(kategori.kategoriAd!),);
      listTabWidget.add(tab);

      var urunler = listUrun.where((element) => element.kategoriId==kategori.id).toList();

      List<Widget> urunWidget=[];
      urunler.forEach((urun) {
        var con =  Container(child: Text(urun.urunAd!),);
        urunWidget.add(con);
      });

      var listWidget= ListView(children: urunWidget,);
      listViewWidget.add(listWidget);

    });
  }
  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: listKategori.length,
      child: Scaffold(
          appBar: AppBar(
            toolbarHeight: 0,
            bottom: TabBar(tabs: listTabWidget,),),
          body: TabBarView(children: listViewWidget,)),
    );
  }
}

import 'package:flutter/material.dart';
import 'package:pos/Ekhizmetlerpk/Sabitler.dart';

class MasalarPage extends StatefulWidget {
  const MasalarPage({Key? key}) : super(key: key);

  @override
  State<MasalarPage> createState() => _MasalarPageState();
}

class KategoriModel {
  int? id;
  String? kategoriAd; // YİYECEKLER , İÇECEKLER
}

class UrunModel {
  int? id;
  int? kategoriId;
  String? urunAd; // AYRAN KOLA DÖNER PİZZA
}

class _MasalarPageState extends State<MasalarPage> {
  List<KategoriModel> listKategori = [];
  List<UrunModel> listUrun = [];

  List<Widget> listTabWidget = [];
  List<Widget> listUrunWidget = [];
  List<Widget> listViewWidget = [];

  void kategoriEkle(int id, String katAd) {
    KategoriModel kat = new KategoriModel();
    kat.id = id;
    kat.kategoriAd = katAd;
    listKategori.add(kat);
  }

  void urunEkle(int kategoriId, int urunId, String urunAd) {
    UrunModel urun = new UrunModel();
    urun.id = urunId;
    urun.kategoriId = kategoriId;
    urun.urunAd = urunAd;
    listUrun.add(urun);
  }

  int dizayncount = 3;

  @override
  void initState() {
    super.initState();

    masalariYukle();
  }

  void masalariYukle() {
    listKategori = [];
    listUrun = [];
    listTabWidget = [];
    listUrunWidget = [];
    listViewWidget = [];

    kategoriEkle(1, "BAHÇE");
    kategoriEkle(2, "SALON");

    for (int i = 1; i < 50; i++) {
      urunEkle(1, i, "MASA $i");
      urunEkle(1, i, "MASA $i");
    }

    for (int i = 50; i < 100; i++) {
      urunEkle(2, i, "MASA $i");
      urunEkle(2, i, "MASA $i");
    }

    listKategori.forEach((kategori) {
      Widget tab = Tab(
        child: Text(kategori.kategoriAd!),
      );
      listTabWidget.add(tab);

      var urunler = listUrun
          .where((element) => element.kategoriId == kategori.id)
          .toList();

      // burayı ekledim
      var grid = GridView.builder(
        itemCount: urunler.length,
        // scrollDirection: Axis.horizontal, // scrool soldan sağa olur
        gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: dizayncount,
          mainAxisExtent: 85, // yükseklik demek
        ),
        itemBuilder: (BuildContext contex, int index) {
          var urun = urunler[index];
          return Container(
            child: InkWell(
              onTap: () {
                Sabitler.mesajYaz(urun.urunAd!);
              },
              child: Card(
                shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(20)),
                child: Center(
                  child: Container(
                    padding: EdgeInsets.only(left: 5, right: 5),
                    child: Text(
                      urun.urunAd!,
                      textAlign: TextAlign.center,
                      style:
                          TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
                    ),
                  ),
                ),
              ),
            ),
          );
        },
      );

      listViewWidget.add(grid);
    });
  }

  @override
  Widget build(BuildContext context) {
    masalariYukle();

    return DefaultTabController(
      length: listKategori.length,
      child: Scaffold(
          appBar: AppBar(
            title: Text("MASALAR"),
            actions: [
              IconButton(
                  onPressed: () {},
                  icon: Icon(
                    Icons.refresh,
                    size: 30.0,
                  )),
              IconButton(
                  onPressed: () {
                    dizayncount++;
                    if (dizayncount == 6) {
                      dizayncount = 1;
                    }
                    setState(() {});
                  },
                  icon: Icon(
                    Icons.list_alt_outlined,
                    size: 30.0,
                  )),
            ],
            toolbarHeight: 35,
            bottom: TabBar(
              tabs: listTabWidget,
            ),
          ),
          body: TabBarView(
            children: listViewWidget,
          )),
    );
  }
}