fbmobile/lib/ui/widgets/my_appbar.dart

import 'package:flutter/material.dart';

import '../widgets/about_iconbutton.dart';

class MyAppBar extends AppBar {
  static final List<Widget> aboutEnabledWidgets = [AboutIconButton()];
  static final List<Widget> aboutDisabledWidgets = [];

  MyAppBar(
      {Key? key,
      required Widget title,
      List<Widget>? actionWidgets,
      bool enableAbout = true})
      : super(
            key: key,
            title: Row(children: <Widget>[title]),
            actions: _renderIconButtons(actionWidgets, enableAbout));

  static List<Widget> _renderIconButtons(
      List<Widget>? actionWidgets, bool aboutEnabled) {
    actionWidgets ??= [];

    List<Widget> widgets = [...actionWidgets];

    if (aboutEnabled) {
      widgets.add(AboutIconButton());
    }

    return widgets;
  }
}