rkmmobile/lib/screens/registers_citizen/main_register_citizen_screen.dart

import 'package:flutter/material.dart';
import 'package:rkm/screens/registers_citizen/register_citizen_screen.dart';
import 'package:rkm/screens/register_home_screen.dart';
import 'package:rkm/screens/registers_citizen/register_individual_screen.dart';
import 'package:rkm/utils/color_palette.dart';
import 'package:rkm/widgets/text_default.dart';
import '../../widgets/alert_dialog_settings.dart';
import '../../widgets/icon_button_default.dart';

class MainRegisterCitizenScreen extends StatefulWidget {
  int screens;
   MainRegisterCitizenScreen({
    required this.screens
});

  @override
  State<MainRegisterCitizenScreen> createState() => _MainRegisterCitizenScreenState();
}

class _MainRegisterCitizenScreenState extends State<MainRegisterCitizenScreen> {

  int index = 1;

  TabBar get _tabBar => TabBar(
    labelColor: index==1?ColorPalette.gray:ColorPalette.blackButton,
    unselectedLabelColor:  ColorPalette.gray,
    indicatorColor: ColorPalette.white,
    tabs: [
      Tab(text: 'Cadastro Cidadão',icon: Icon(Icons.person),iconMargin: EdgeInsets.zero,height: 50,),
      Tab(text: 'Cadastro Individual',icon: Icon(Icons.article),iconMargin: EdgeInsets.zero,height: 40,),
      Tab(text: 'Cadastro Domiciliar',icon: Icon(Icons.home),iconMargin: EdgeInsets.zero,height: 40,)
    ],
  );

  updateIndex(){
    setState(() {
      index = widget.screens;
    });
  }

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

  @override
  Widget build(BuildContext context) =>DefaultTabController(
      length: index,
      child: Scaffold(
        appBar: AppBar(
          title: TextDefault(text: 'RKM AB - Cadastro Cidadão',color: ColorPalette.white,),
          centerTitle: true,
          actions: [
            IconButtonDefault(
                icon: Icons.settings,
                color: ColorPalette.white,
                onPressed: ()=>AlertDialogSettings().alert(context)
            ),
            IconButtonDefault(
                icon: Icons.logout,
                color: ColorPalette.white,
                onPressed: ()=>Navigator.pushNamedAndRemoveUntil(context, '/login',(Route<dynamic> route) => false)),
          ],
          bottom: PreferredSize(
            preferredSize: _tabBar.preferredSize,
            child: Material(
              color: ColorPalette.white, //<-- SEE HERE
              child: _tabBar,
            ),
          ),
        ),
        body:index==1 ?
        TabBarView(
              children: [
                RegisterCitizenScreen(),
              ],
            ):TabBarView(
              children: [
                RegisterCitizenScreen(),
                RegisterIndividualScreen(),
                RegisterHomeScreen(),
              ],
            ),
      )
  );
}