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samples/flutter_maps_firestore/lib/main.dart

283 lines
7.2 KiB

// Copyright 2019 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:async';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:google_maps_webservice/places.dart';
import 'api_key.dart';
// Center of the Google Map
const initialPosition = LatLng(37.7786, -122.4375);
// Hue used by the Google Map Markers to match the theme
const _pinkHue = 350.0;
// Places API client used for Place Photos
final _placesApiClient = GoogleMapsPlaces(apiKey: googleMapsApiKey);
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp(const App());
}
class App extends StatelessWidget {
const App({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Ice Creams FTW',
home: const HomePage(title: 'Ice Cream Stores in SF'),
theme: ThemeData(
colorSchemeSeed: Colors.pink,
scaffoldBackgroundColor: Colors.pink[50],
useMaterial3: true,
),
);
}
}
class HomePage extends StatefulWidget {
const HomePage({required this.title, super.key});
final String title;
@override
State<StatefulWidget> createState() {
return _HomePageState();
}
}
class _HomePageState extends State<HomePage> {
late Stream<QuerySnapshot> _iceCreamStores;
final Completer<GoogleMapController> _mapController = Completer();
@override
void initState() {
super.initState();
_iceCreamStores = FirebaseFirestore.instance
.collection('ice_cream_stores')
.orderBy('name')
.snapshots();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: StreamBuilder<QuerySnapshot>(
stream: _iceCreamStores,
builder: (context, snapshot) {
if (snapshot.hasError) {
return Center(child: Text('Error: ${snapshot.error}'));
}
if (!snapshot.hasData) {
return const Center(child: Text('Loading...'));
}
return Stack(
children: [
StoreMap(
documents: snapshot.data!.docs,
initialPosition: initialPosition,
mapController: _mapController,
),
StoreCarousel(
mapController: _mapController,
documents: snapshot.data!.docs,
),
],
);
},
),
);
}
}
class StoreCarousel extends StatelessWidget {
const StoreCarousel({
super.key,
required this.documents,
required this.mapController,
});
final List<DocumentSnapshot> documents;
final Completer<GoogleMapController> mapController;
@override
Widget build(BuildContext context) {
return Align(
alignment: Alignment.topLeft,
child: Padding(
padding: const EdgeInsets.only(top: 10),
child: SizedBox(
height: 90,
child: StoreCarouselList(
documents: documents,
mapController: mapController,
),
),
),
);
}
}
class StoreCarouselList extends StatelessWidget {
const StoreCarouselList({
super.key,
required this.documents,
required this.mapController,
});
final List<DocumentSnapshot> documents;
final Completer<GoogleMapController> mapController;
@override
Widget build(BuildContext context) {
return ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: documents.length,
itemBuilder: (context, index) {
return SizedBox(
width: 340,
child: Padding(
padding: const EdgeInsets.only(left: 8),
child: Card(
child: Center(
child: StoreListTile(
document: documents[index],
mapController: mapController,
),
),
),
),
);
},
);
}
}
class StoreListTile extends StatefulWidget {
const StoreListTile({
super.key,
required this.document,
required this.mapController,
});
final DocumentSnapshot document;
final Completer<GoogleMapController> mapController;
@override
State<StatefulWidget> createState() {
return _StoreListTileState();
}
}
class _StoreListTileState extends State<StoreListTile> {
String _placePhotoUrl = '';
bool _disposed = false;
@override
void initState() {
super.initState();
_retrievePlacesDetails();
}
@override
void dispose() {
_disposed = true;
super.dispose();
}
Future<void> _retrievePlacesDetails() async {
final details = await _placesApiClient
.getDetailsByPlaceId(widget.document['placeId'] as String);
if (!_disposed) {
setState(() {
_placePhotoUrl = _placesApiClient.buildPhotoUrl(
photoReference: details.result.photos[0].photoReference,
maxHeight: 300,
);
});
}
}
@override
Widget build(BuildContext context) {
return ListTile(
title: Text(widget.document['name'] as String),
subtitle: Text(widget.document['address'] as String),
leading: SizedBox(
width: 100,
height: 100,
child: _placePhotoUrl.isNotEmpty
? ClipRRect(
borderRadius: const BorderRadius.all(Radius.circular(2)),
child: Image.network(_placePhotoUrl, fit: BoxFit.cover),
)
: Container(),
),
onTap: () async {
final controller = await widget.mapController.future;
await controller.animateCamera(
CameraUpdate.newCameraPosition(
CameraPosition(
target: LatLng(
widget.document['location'].latitude as double,
widget.document['location'].longitude as double,
),
zoom: 16,
),
),
);
},
);
}
}
class StoreMap extends StatelessWidget {
const StoreMap({
super.key,
required this.documents,
required this.initialPosition,
required this.mapController,
});
final List<DocumentSnapshot> documents;
final LatLng initialPosition;
final Completer<GoogleMapController> mapController;
@override
Widget build(BuildContext context) {
return GoogleMap(
initialCameraPosition: CameraPosition(
target: initialPosition,
zoom: 12,
),
markers: documents
.map((document) => Marker(
markerId: MarkerId(document['placeId'] as String),
icon: BitmapDescriptor.defaultMarkerWithHue(_pinkHue),
position: LatLng(
document['location'].latitude as double,
document['location'].longitude as double,
),
infoWindow: InfoWindow(
title: document['name'] as String?,
snippet: document['address'] as String?,
),
))
.toSet(),
onMapCreated: (mapController) {
this.mapController.complete(mapController);
},
);
}
}