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restructured the add to app samples (#698)
This commit is contained in:
gaaclarke
GitHub
100
add_to_app/books/flutter_module_books/lib/api.dart
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100
add_to_app/books/flutter_module_books/lib/api.dart
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// Autogenerated from Pigeon (v0.1.0), do not edit directly.
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// See also: https://pub.dev/packages/pigeon
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// ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import
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import 'dart:async';
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import 'package:flutter/services.dart';
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class Book {
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String title;
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String subtitle;
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String author;
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String description;
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String publishDate;
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int pageCount;
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// ignore: unused_element
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Map<dynamic, dynamic> _toMap() {
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final Map<dynamic, dynamic> pigeonMap = <dynamic, dynamic>{};
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pigeonMap['title'] = title;
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pigeonMap['subtitle'] = subtitle;
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pigeonMap['author'] = author;
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pigeonMap['description'] = description;
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pigeonMap['publishDate'] = publishDate;
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pigeonMap['pageCount'] = pageCount;
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return pigeonMap;
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}
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// ignore: unused_element
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static Book _fromMap(Map<dynamic, dynamic> pigeonMap) {
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final Book result = Book();
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result.title = pigeonMap['title'];
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result.subtitle = pigeonMap['subtitle'];
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result.author = pigeonMap['author'];
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result.description = pigeonMap['description'];
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result.publishDate = pigeonMap['publishDate'];
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result.pageCount = pigeonMap['pageCount'];
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return result;
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}
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}
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abstract class FlutterBookApi {
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void displayBookDetails(Book arg);
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static void setup(FlutterBookApi api) {
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{
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const BasicMessageChannel<dynamic> channel = BasicMessageChannel<dynamic>(
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'dev.flutter.pigeon.FlutterBookApi.displayBookDetails',
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StandardMessageCodec());
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channel.setMessageHandler((dynamic message) async {
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final Map<dynamic, dynamic> mapMessage =
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message as Map<dynamic, dynamic>;
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final Book input = Book._fromMap(mapMessage);
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api.displayBookDetails(input);
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});
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}
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}
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}
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class HostBookApi {
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Future<void> cancel() async {
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const BasicMessageChannel<dynamic> channel = BasicMessageChannel<dynamic>(
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'dev.flutter.pigeon.HostBookApi.cancel', StandardMessageCodec());
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final Map<dynamic, dynamic> replyMap = await channel.send(null);
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if (replyMap == null) {
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throw PlatformException(
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code: 'channel-error',
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message: 'Unable to establish connection on channel.',
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details: null);
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} else if (replyMap['error'] != null) {
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final Map<dynamic, dynamic> error = replyMap['error'];
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throw PlatformException(
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code: error['code'],
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message: error['message'],
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details: error['details']);
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} else {
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// noop
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}
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}
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Future<void> finishEditingBook(Book arg) async {
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final Map<dynamic, dynamic> requestMap = arg._toMap();
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const BasicMessageChannel<dynamic> channel = BasicMessageChannel<dynamic>(
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'dev.flutter.pigeon.HostBookApi.finishEditingBook',
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StandardMessageCodec());
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final Map<dynamic, dynamic> replyMap = await channel.send(requestMap);
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if (replyMap == null) {
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throw PlatformException(
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code: 'channel-error',
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message: 'Unable to establish connection on channel.',
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details: null);
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} else if (replyMap['error'] != null) {
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final Map<dynamic, dynamic> error = replyMap['error'];
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throw PlatformException(
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code: error['code'],
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message: error['message'],
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details: error['details']);
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} else {
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// noop
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}
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}
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}
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201
add_to_app/books/flutter_module_books/lib/main.dart
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201
add_to_app/books/flutter_module_books/lib/main.dart
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// Copyright 2020 The Flutter team. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/material.dart';
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import 'package:flutter_module_books/api.dart';
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void main() => runApp(MyApp());
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class MyApp extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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theme: ThemeData(
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primaryColor: const Color(0xff6200ee),
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),
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home: BookDetail(),
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);
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}
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}
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typedef BookReceived = void Function(Book book);
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class FlutterBookApiHandler extends FlutterBookApi {
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FlutterBookApiHandler(this.callback);
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final BookReceived callback;
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@override
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void displayBookDetails(Book book) {
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assert(
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book != null,
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'Non-null book expected from FlutterBookApi.displayBookDetails call.',
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);
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callback(book);
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}
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}
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class BookDetail extends StatefulWidget {
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const BookDetail({this.hostApi, this.flutterApi});
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// These are the outgoing and incoming APIs that are here for injection for
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// tests.
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final HostBookApi hostApi;
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final FlutterBookApi flutterApi;
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@override
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_BookDetailState createState() => _BookDetailState();
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}
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class _BookDetailState extends State<BookDetail> {
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Book book;
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HostBookApi hostApi;
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FocusNode textFocusNode = FocusNode();
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TextEditingController titleTextController = TextEditingController();
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TextEditingController subtitleTextController = TextEditingController();
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TextEditingController authorTextController = TextEditingController();
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@override
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void initState() {
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super.initState();
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// This `HostBookApi` class instance lets us make outgoing calls to the
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// platform.
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hostApi = widget.hostApi ?? HostBookApi();
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// Registering this `FlutterBookApiHandler` class lets us receive incoming
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// calls from the platform.
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// TODO(gaaclarke): make the setup method an instance method so it's
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// injectable https://github.com/flutter/flutter/issues/59119.
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FlutterBookApi.setup(FlutterBookApiHandler(
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// The `FlutterBookApi` just has one method. Just give a closure for that
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// method to the handler class.
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(Book book) {
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setState(() {
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// This book model is what we're going to return to Kotlin eventually.
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// Keep it bound to the UI.
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this.book = book;
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titleTextController.text = book.title;
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titleTextController.addListener(() {
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this.book?.title = titleTextController.text;
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});
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// Subtitle could be null.
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// TODO(gaaclarke): https://github.com/flutter/flutter/issues/59118.
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subtitleTextController.text = book.subtitle ?? '';
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subtitleTextController.addListener(() {
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this.book?.subtitle = subtitleTextController.text;
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});
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authorTextController.text = book.author;
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authorTextController.addListener(() {
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this.book?.author = authorTextController.text;
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});
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});
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}));
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}
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void clear() {
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book = null;
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// Keep focus if going to the home screen but unfocus if leaving
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// the activity.
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textFocusNode.unfocus();
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: Text('Book Details'),
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leading: IconButton(
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icon: Icon(Icons.clear),
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// Pressing clear cancels the edit and leaves the activity without
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// modification.
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onPressed: () {
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hostApi.cancel();
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clear();
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},
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),
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actions: [
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IconButton(
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icon: Icon(Icons.check),
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// Pressing save sends the updated book to the platform.
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onPressed: () {
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hostApi.finishEditingBook(book);
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clear();
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},
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),
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],
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),
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body: book == null
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// Draw a spinner until the platform gives us the book to show details
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// for.
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? Center(child: CircularProgressIndicator())
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: Focus(
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focusNode: textFocusNode,
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child: ListView(
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padding: EdgeInsets.all(24),
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children: [
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TextField(
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controller: titleTextController,
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decoration: InputDecoration(
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border: OutlineInputBorder(),
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filled: true,
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hintText: "Title",
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labelText: "Title",
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),
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),
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SizedBox(height: 24),
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TextField(
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controller: subtitleTextController,
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maxLines: 2,
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decoration: InputDecoration(
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border: OutlineInputBorder(),
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filled: true,
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hintText: "Subtitle",
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labelText: "Subtitle",
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),
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),
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SizedBox(height: 24),
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TextField(
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controller: authorTextController,
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decoration: InputDecoration(
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border: OutlineInputBorder(),
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filled: true,
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hintText: "Author",
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labelText: "Author",
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),
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),
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SizedBox(height: 32),
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Divider(),
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Center(
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child: Padding(
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padding: const EdgeInsets.all(8.0),
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child: Text(
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'${book.pageCount} pages ~ published ${book.publishDate}'),
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),
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),
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Divider(),
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SizedBox(height: 32),
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Center(
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child: Text(
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'BOOK DESCRIPTION',
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style: TextStyle(
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fontSize: 15,
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fontWeight: FontWeight.bold,
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decoration: TextDecoration.underline,
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),
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),
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),
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SizedBox(height: 12),
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Text(
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book.description,
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style: TextStyle(color: Colors.grey.shade600, height: 1.24),
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),
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],
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),
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),
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);
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}
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}
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