Flutter: Drawerメニューのサンプル

トップ画面のメニューにポップアップメニューを追加したが、ドロワーメニューに変える。

import 'dart:io';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

import './google_sign_in.dart';
import './firestore_cloud_vision.dart';
import './firebase_auth.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  final message = "Initial Message.";
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Sample',
      home: MyHomePage(message:this.message),
    );
  }
}

enum Menu {
  google_sign_in,
  firestore_cloud_vision,
  firebase_auth
}

class MyHomePageState extends State<MyHomePage>{
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.message)
      ),
      drawer: Drawer(
        child: ListView(
          children: <Widget>[
            DrawerHeader(
              child: Text('Drawer Header'),
              decoration: BoxDecoration(
                color: Colors.blue,
              ),
            ),
            ListTile( leading:Icon(Icons.account_box),
                title:Text("Google Sign In"),
                onTap: () => drawerMenuSelected(Menu.google_sign_in)),
            ListTile( leading:Icon(Icons.account_circle),
                title:Text("Firebase Auth"),
                onTap: () => drawerMenuSelected(Menu.firebase_auth)),
            ListTile( leading:Icon(Icons.crop_original),
                title:Text("Firestore,CloudVision"),
                onTap: () => drawerMenuSelected(Menu.firestore_cloud_vision)),
          ],
        ),
      ),
    );
  }

  void drawerMenuSelected(Menu selectedMenu){
    switch(selectedMenu) {
      case Menu.google_sign_in:
        _pushPage(context, GoogleSignInPage());
        break;
      case Menu.firebase_auth:
        _pushPage(context, FirebaseAuthPage());
        break;
      case Menu.firestore_cloud_vision:
        _pushPage(context, FirestoreCloudVisionPage());
        break;
      default:
        break;
    }
  }

  void _pushPage(BuildContext context, Widget page) {
    Navigator.of(context).push(
      MaterialPageRoute<void>(builder: (_) => page)
    );
  }
}

class MyHomePage extends StatefulWidget {
  final String message;
  MyHomePage({this.message}):super() {}
  @override
  State<StatefulWidget> createState() => new MyHomePageState();
}

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