manta/win_text_editor/lib/app/menus/app_menu.dart

import 'package:flutter/material.dart';
import 'package:win_text_editor/app/menus/menu_constants.dart';

import 'menu_actions.dart';

class AppMenu extends StatelessWidget {
  const AppMenu({super.key});

  @override
  Widget build(BuildContext context) {
    return Container(
      height: 30,
      color: Colors.grey[200],
      child: Row(
        children: [
          _buildMenuButton(context, '文件', _buildFileMenuItems()),
          _buildMenuButton(context, '编辑', _buildEditMenuItems()),
          _buildMenuButton(context, '窗口', _buildWindowMenuItems()),
          _buildMenuButton(context, '帮助', _buildHelpMenuItems()),
        ],
      ),
    );
  }

  Widget _buildMenuButton(BuildContext context, String label, List<PopupMenuEntry<String>> items) {
    return PopupMenuButton<String>(
      offset: const Offset(0, 30),
      child: Padding(padding: const EdgeInsets.symmetric(horizontal: 12.0), child: Text(label)),
      itemBuilder: (context) => items,
      onSelected: (value) => MenuActions.handleMenuAction(value, context),
    );
  }

  List<PopupMenuEntry<String>> _buildFileMenuItems() {
    return [
      const PopupMenuItem<String>(value: MenuConstants.openFolder, child: Text('打开文件夹...')),
      const PopupMenuItem<String>(value: MenuConstants.save, child: Text('保存')),
      const PopupMenuItem<String>(value: MenuConstants.saveAs, child: Text('另存为...')),
      const PopupMenuItem<String>(value: MenuConstants.exit, child: Text('退出')),
    ];
  }

  List<PopupMenuEntry<String>> _buildEditMenuItems() {
    return [
      const PopupMenuItem<String>(value: MenuConstants.undo, child: Text('撤销')),
      const PopupMenuItem<String>(value: MenuConstants.redo, child: Text('重做')),
      const PopupMenuItem<String>(value: MenuConstants.cut, child: Text('剪切')),
      const PopupMenuItem<String>(value: MenuConstants.copy, child: Text('复制')),
      const PopupMenuItem<String>(value: MenuConstants.paste, child: Text('粘贴')),
    ];
  }

  List<PopupMenuEntry<String>> _buildWindowMenuItems() {
    return [
      const PopupMenuItem<String>(value: MenuConstants.minimize, child: Text('最小化')),
      const PopupMenuItem<String>(value: MenuConstants.maximize, child: Text('最大化')),
      const PopupMenuItem<String>(value: MenuConstants.close, child: Text('关闭')),
    ];
  }

  List<PopupMenuEntry<String>> _buildHelpMenuItems() {
    return [
      const PopupMenuItem<String>(value: MenuConstants.about, child: Text('关于')),
      const PopupMenuItem<String>(value: MenuConstants.help, child: Text('帮助')),
    ];
  }
}