Custom app bar

custom_app_bar.dart

import 'package:flutter/material.dart';

/// Custom appbar with custom paddings and height
class MyCustomAppBar extends StatelessWidget implements PreferredSizeWidget {
  final double _height;
  final Widget Function(BuildContext context) _builder;

  /// Builds custom app bar with [height] and [builder].
  const MyCustomAppBar({
    Key key,
    @required double height,
    @required Widget Function(BuildContext context) builder,
  })
  : _height = height
  , _builder = builder
  , super(key: key);

  @override
  Widget build(BuildContext context) => _builder(context);

  @override
  Size get preferredSize => Size.fromHeight(_height);
}