diplomatic-quarter/lib/widgets/bottom_navigation/bottom_nav_bar.dart

import 'package:diplomaticquarterapp/uitl/translations_delegate_base.dart';
import 'package:eva_icons_flutter/eva_icons_flutter.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

import 'bottom_navigation_item.dart';

class BottomNavBar extends StatefulWidget {
  final ValueChanged<int> changeIndex;

  BottomNavBar({Key key, this.changeIndex}) : super(key: key);

  @override
  _BottomNavBarState createState() => _BottomNavBarState();
}

class _BottomNavBarState extends State<BottomNavBar> {
  int _index = 0;

  _changeIndex(int index) {
    widget.changeIndex(index);
    setState(() {
      _index = index;
    });
  }

  @override
  Widget build(BuildContext context) {
    return BottomAppBar(
      elevation: 4,
      shape: CircularNotchedRectangle(),
      color: Colors.white,
      child: Padding(
        padding: EdgeInsets.symmetric(horizontal: 18),
        child: Row(
          mainAxisSize: MainAxisSize.max,
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: [
            BottomNavigationItem(
              icon: EvaIcons.home,
              activeIcon: EvaIcons.home,
              changeIndex: _changeIndex,
              index: _index,
              currentIndex: 0,
              name: TranslationBase.of(context).home,
            ),
            BottomNavigationItem(
              icon: EvaIcons.list,
              activeIcon: EvaIcons.list,
              changeIndex: _changeIndex,
              index: _index,
              currentIndex: 1,
              name: TranslationBase.of(context).replay2,
            ),
            Expanded(
              child: SizedBox(
                height: 50,
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    SizedBox(height: 22)
                  ],
                ),
              ),
            ),
            BottomNavigationItem(
              icon:EvaIcons.person,
              activeIcon: EvaIcons.person,
              changeIndex: _changeIndex,
              index: _index,
              currentIndex: 2,
              name: TranslationBase.of(context).mySchedule,
            ),
            BottomNavigationItem(
              icon: EvaIcons.calendar,
              activeIcon: EvaIcons.calendar,
              changeIndex: _changeIndex,
              index: _index,
              currentIndex: 3,
              name: TranslationBase.of(context).services,
            )
          ],
        ),
      ),
    );
  }
}