geoflutterfire 3.0.0-nullsafety.4 geoflutterfire: ^3.0.0-nullsafety.4 copied to clipboard
GeoFlutterFire is an open-source library that allows you to store and query firestore documents based on their geographic location.
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'streambuilder_test.dart';
import 'package:geoflutterfire/geoflutterfire.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:rxdart/rxdart.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp(MaterialApp(
title: 'Geo Flutter Fire example',
home: MyApp(),
debugShowCheckedModeBanner: false,
));
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
Completer<GoogleMapController> _mapController = Completer();
TextEditingController _latitudeController = TextEditingController();
TextEditingController _longitudeController = TextEditingController();
// firestore init
final _firestore = FirebaseFirestore.instance;
late Geoflutterfire geo;
late Stream<List<DocumentSnapshot>> stream;
var radius = BehaviorSubject.seeded(100.0);
//Map markers
List<Marker> markers = [];
@override
void initState() {
super.initState();
geo = Geoflutterfire();
GeoFirePoint center = geo.point(latitude: 12.960632, longitude: 77.641603);
stream = radius.switchMap((rad) {
var collectionReference = _firestore.collection('locations');
// .where('name', isEqualTo: 'darshan');
return geo.collection(collectionRef: collectionReference).within(center: center, radius: rad, field: 'position');
/** Example to specify nested object
var collectionReference = _firestore.collection('nestedLocations');
// .where('name', isEqualTo: 'darshan');
return geo.collection(collectionRef: collectionReference).within(
center: center, radius: rad, field: 'address.location.position');
*/
});
}
@override
void dispose() {
super.dispose();
radius.close();
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('GeoFlutterFire'),
actions: <Widget>[
IconButton(
onPressed: () => _showHome(),
icon: Icon(Icons.home),
)
],
),
body: SingleChildScrollView(
child: Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Center(
child: Card(
elevation: 4,
margin: EdgeInsets.symmetric(vertical: 8),
child: SizedBox(
width: MediaQuery.of(context).size.width - 30,
height: MediaQuery.of(context).size.height * (1 / 3),
child: GoogleMap(
onMapCreated: _onMapCreated,
initialCameraPosition: const CameraPosition(
target: LatLng(12.960632, 77.641603),
zoom: 15.0,
),
markers: markers.toSet(),
),
),
),
),
Padding(
padding: const EdgeInsets.only(top: 8.0),
child: Slider(
min: 1,
max: 200,
divisions: 4,
value: _value,
label: _label,
activeColor: Colors.blue,
inactiveColor: Colors.blue.withOpacity(0.2),
onChanged: (double value) => changed(value),
),
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Container(
width: 100,
child: TextField(
controller: _latitudeController,
keyboardType: TextInputType.number,
textInputAction: TextInputAction.next,
decoration: InputDecoration(
labelText: 'lat',
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(8),
)),
),
),
Container(
width: 100,
child: TextField(
controller: _longitudeController,
keyboardType: TextInputType.number,
decoration: InputDecoration(
labelText: 'lng',
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(8),
)),
),
),
MaterialButton(
color: Colors.blue,
onPressed: () {
double lat = double.parse(_latitudeController.text);
double lng = double.parse(_longitudeController.text);
_addPoint(lat, lng);
},
child: Text(
'ADD',
style: TextStyle(color: Colors.white),
),
)
],
),
MaterialButton(
color: Colors.amber,
child: Text(
'Add nested ',
style: TextStyle(color: Colors.white),
),
onPressed: () {
double lat = double.parse(_latitudeController.text);
double lng = double.parse(_longitudeController.text);
_addNestedPoint(lat, lng);
},
),
MaterialButton(
color: Colors.blueGrey,
child: Text(
'Stream Test ',
style: TextStyle(color: Colors.white),
),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => StreamTestWidget()),
);
},
)
],
),
),
),
),
);
}
void _onMapCreated(GoogleMapController controller) {
_mapController.complete(controller);
stream.listen((List<DocumentSnapshot> documentList) {
_updateMarkers(documentList);
});
}
void _showHome() async {
final GoogleMapController controller = await _mapController.future;
controller.animateCamera(CameraUpdate.newCameraPosition(
const CameraPosition(
target: LatLng(12.960632, 77.641603),
zoom: 15.0,
),
));
}
void _addPoint(double lat, double lng) {
GeoFirePoint geoFirePoint = geo.point(latitude: lat, longitude: lng);
_firestore.collection('locations').add({'name': 'random name', 'position': geoFirePoint.data}).then((_) {
print('added ${geoFirePoint.hash} successfully');
});
setState(() {
});
}
//example to add geoFirePoint inside nested object
void _addNestedPoint(double lat, double lng) {
GeoFirePoint geoFirePoint = geo.point(latitude: lat, longitude: lng);
_firestore.collection('nestedLocations').add({
'name': 'random name',
'address': {
'location': {'position': geoFirePoint.data}
}
}).then((_) {
print('added ${geoFirePoint.hash} successfully');
});
}
void _addMarker(double lat, double lng) {
var _marker = Marker(
markerId: MarkerId(UniqueKey().toString()),
position: LatLng(lat, lng),
icon: BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueViolet),
);
setState(() {
markers.add(_marker);
});
}
void _updateMarkers(List<DocumentSnapshot> documentList) {
documentList.forEach((DocumentSnapshot document) {
GeoPoint point = document['position']['geopoint'];
_addMarker(point.latitude, point.longitude);
});
}
double _value = 40.0;
String _label = '';
changed(value) {
setState(() {
_value = value;
_label = '${_value.toInt().toString()} kms';
markers.clear();
radius.add(value);
});
}
}