Flutter web-禁用空格键滚动？

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return RawKeyboardListener(
      focusNode: FocusNode(),
      onKey: (RawKeyEvent event) {
        if (event is RawKeyDownEvent &&
            event.logicalKey == LogicalKeyboardKey.space) {
          event.data.preventDefault(); // 阻止默认的滚动行为
        }
      },
      child: MaterialApp(
        title: 'Flutter Web',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        home: Scaffold(
          appBar: AppBar(
            title: Text('Flutter Web'),
          ),
          body: Center(
            child: Text(
              'Hello, Flutter Web!',
              style: TextStyle(fontSize: 24),
            ),
          ),
        ),
      ),
    );
  }
}