flutter_polyline_points_plus 3.0.0

flutter_polyline_points_plus: ^3.0.0 copied to clipboard

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:flutter_polyline_points_plus/flutter_polyline_points_plus.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';

void main() async {
  await dotenv.load(fileName: "env/.env");
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Polyline example',
      theme: ThemeData(
        primarySwatch: Colors.orange,
      ),
      home: const MapScreen(),
    );
  }
}

class MapScreen extends StatefulWidget {
  const MapScreen({super.key});

  @override
  State<MapScreen> createState() => _MapScreenState();
}

class _MapScreenState extends State<MapScreen> {
  late GoogleMapController mapController;
  // double _originLatitude = 6.5212402, _originLongitude = 3.3679965;
  // double _destLatitude = 6.849660, _destLongitude = 3.648190;
  final double _originLatitude = 26.48424, _originLongitude = 50.04551;
  final double _destLatitude = 26.46423, _destLongitude = 50.06358;
  Map<MarkerId, Marker> markers = {};
  Map<PolylineId, Polyline> polylines = {};
  List<LatLng> polylineCoordinates = [];
  PolylinePoints polylinePoints = PolylinePoints();

  @override
  void initState() {
    super.initState();

    /// origin marker
    _addMarker(LatLng(_originLatitude, _originLongitude), "origin",
        BitmapDescriptor.defaultMarker);

    /// destination marker
    _addMarker(LatLng(_destLatitude, _destLongitude), "destination",
        BitmapDescriptor.defaultMarkerWithHue(90));
    _getPolyline();
  }

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
          body: GoogleMap(
        initialCameraPosition: CameraPosition(
            target: LatLng(_originLatitude, _originLongitude), zoom: 15),
        myLocationEnabled: true,
        tiltGesturesEnabled: true,
        compassEnabled: true,
        scrollGesturesEnabled: true,
        zoomGesturesEnabled: true,
        onMapCreated: _onMapCreated,
        markers: Set<Marker>.of(markers.values),
        polylines: Set<Polyline>.of(polylines.values),
      )),
    );
  }

  void _onMapCreated(GoogleMapController controller) async {
    mapController = controller;
  }

  _addMarker(LatLng position, String id, BitmapDescriptor descriptor) {
    MarkerId markerId = MarkerId(id);
    Marker marker =
        Marker(markerId: markerId, icon: descriptor, position: position);
    markers[markerId] = marker;
  }

  _addPolyLine() {
    PolylineId id = const PolylineId("poly");
    Polyline polyline = Polyline(
        polylineId: id, color: Colors.red, points: polylineCoordinates);
    polylines[id] = polyline;
    setState(() {});
  }

  _getPolyline() async {
    final googleAPiKey = dotenv.get("GOOGLE_API_KEY");
    assert(googleAPiKey.isNotEmpty, "Please add your google api key on .env");
    PolylineResult result = await polylinePoints.getRouteBetweenCoordinates(
        googleAPiKey,
        PointLatLng(_originLatitude, _originLongitude),
        PointLatLng(_destLatitude, _destLongitude),
        travelMode: TravelMode.driving,
        wayPoints: [PolylineWayPoint(location: "Sabo, Yaba Lagos Nigeria")]);
    if (result.points.isNotEmpty) {
      for (var point in result.points) {
        polylineCoordinates.add(LatLng(point.latitude, point.longitude));
      }
    }
    _addPolyLine();
  }
}