flutter_notes_app/lib/widgets/toolbar.dart

import 'package:flutter/material.dart';

class CustomToolbar extends StatelessWidget {
  CustomToolbar(
      {this.title,
      this.icon,
      this.onPressed,
      this.additionalBack,
      this.needBackBtn = true});

  final String title;
  final IconData icon;
  final Function onPressed;
  final bool needBackBtn;
  final Function additionalBack;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: EdgeInsets.all(10),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: <Widget>[
          Visibility(
            child: IconButton(
              icon: Icon(
                Icons.arrow_back,
                size: 27,
                color: Theme.of(context).primaryColor,
              ),
              onPressed: () {
                Navigator.pop(context, true);
                if (additionalBack != null) additionalBack();
              },
            ),
            visible: needBackBtn,
            maintainSize: true,
            maintainAnimation: true,
            maintainState: true,
          ),
          Text(
            title,
            style: TextStyle(
                fontSize: 26,
                fontWeight: FontWeight.w500,
                color: Theme.of(context).primaryColor),
          ),
          IconButton(
              icon: Icon(
                icon,
                size: 22,
                color: Theme.of(context).primaryColor,
              ),
              onPressed: onPressed),
        ],
      ),
    );
  }
}