lib/common/widgets/we_app_bar.dart

import 'package:flutter/material.dart';
class WEAppBar extends StatelessWidget implements PreferredSizeWidget {
  final String? titleText;
  final bool? centerTitle;
  final VoidCallback? onBack;
  final Color? backgroundColor;
  final PreferredSizeWidget? bottom;
  const WEAppBar({
    this.titleText,
    this.centerTitle = true,
    this.onBack,
    this.backgroundColor,
    this.bottom,
    super.key});
  @override
  Widget build(BuildContext context) {
    return AppBar(
      centerTitle: centerTitle,
      title: Text(titleText??''),
      backgroundColor: backgroundColor??Theme.of(context).colorScheme.inversePrimary,
    );
  }
  @override
  // TODO: implement preferredSize
  Size get preferredSize => Size.fromHeight(
      kToolbarHeight + (bottom == null ? 0.0 : bottom!.preferredSize.height));
}