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healthcare-frontend/lib/maps/order_tracking_page.dart

253 lines
7.1 KiB

import 'dart:async';
import 'dart:developer';
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter_polyline_points/flutter_polyline_points.dart';
import 'package:get/get.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:location/location.dart';
import 'location_controller.dart';
class OrderTrackingPage extends StatefulWidget {
var lat;
var lng;
var d_lat;
var d_lng;
var u_address;
OrderTrackingPage({
this.lat,
this.lng,
this.d_lat,
this.d_lng,
this.u_address
});
@override
OrderTrackingPageState createState() => OrderTrackingPageState();
}
class OrderTrackingPageState extends State<OrderTrackingPage> {
final Completer<GoogleMapController> mapController = Completer();
PolylinePoints polylinePoints = PolylinePoints();
double latitude=0;
double longitude=0;
double d_latitude=0;
double d_longitude=0;
String u_address = '';
LocationData? currentLocation;
String googleAPiKey ="AIzaSyDJpK9RVhlBejtJu9xSGfneuTN6HOfJgSM";
Set<Marker> markers = {};
Map<PolylineId, Polyline> polylines = {};
late LatLng startLocation ;
late LatLng user_location;
LocationController locationController = Get.put(LocationController());
double distance = 0.0;
@override
void initState() {
super.initState();
latitude=widget.lat;
longitude=widget.lng;
d_latitude=widget.d_lat;
d_longitude=widget.d_lng;
u_address=widget.u_address;
user_location = LatLng(widget.lat,widget.lng);
startLocation = LatLng(widget.d_lat,widget.d_lng);
LatLng delivery_Location = LatLng(widget.d_lat,widget.d_lng);
//LatLng endLocation = LatLng(17.4968,78.3614);
ever<LatLng?>(locationController.locationPosition, (value) {
if (value != null) {
// log("${value.latitude} ${value.longitude}");
var latitude = value.latitude;
var longitude = value.longitude;
startLocation = LatLng(widget.d_lat, widget.d_lng);
getDirections(user_location);
}
});
getDirections(user_location); //fetch direction polylines from Google API
}
getDirections(user_location) async {
markers.clear();
markers.add(Marker(
markerId: MarkerId(startLocation.toString()),
position: startLocation,
infoWindow: const InfoWindow(
title: 'Starting Point',
snippet: 'Start Marker',
),
icon: locationController.pickupMarker ?? BitmapDescriptor.defaultMarker,
));
markers.add(Marker(
markerId: MarkerId(user_location.toString()),
position: user_location, //position of marker
infoWindow: const InfoWindow(
title: 'Destination Point ',
snippet: 'Destination Marker',
),
icon: locationController.dropMarker ?? BitmapDescriptor.defaultMarker,
));
List<LatLng> polylineCoordinates = [];
PolylineResult result = await polylinePoints.getRouteBetweenCoordinates(
googleAPiKey,
PointLatLng(startLocation.latitude, startLocation.longitude),
PointLatLng(user_location.latitude, user_location.longitude),
travelMode: TravelMode.driving,
);
if (result.points.isNotEmpty) {
for (var point in result.points) {
polylineCoordinates.add(LatLng(point.latitude, point.longitude));
}
} else {
// log(result.errorMessage ?? "Something went wrong");
}
//polulineCoordinates is the List of longitute and latidtude.
double totalDistance = 0;
for(var i = 0; i < polylineCoordinates.length-1; i++){
totalDistance += calculateDistance(
polylineCoordinates[i].latitude,
polylineCoordinates[i].longitude,
polylineCoordinates[i+1].latitude,
polylineCoordinates[i+1].longitude);
}
print(totalDistance);
setState(() {
distance = totalDistance;
});
addPolyLine(polylineCoordinates);
}
addPolyLine(List<LatLng> polylineCoordinates) async {
PolylineId id = const PolylineId("poly");
Polyline polyline = Polyline(
polylineId: id,
color: Colors.deepPurpleAccent,
points: polylineCoordinates,
width:8,
);
polylines[id] =polyline;
var position = CameraPosition(
target: LatLng(latitude,longitude),
zoom: 16);
final GoogleMapController controller = await mapController.future;
controller.animateCamera(CameraUpdate.newCameraPosition(position));
setState(() {});
}
double calculateDistance(lat1, lon1, lat2, lon2){
var p = 0.017453292519943295;
var a = 0.5 - cos((lat2 - lat1) * p)/2 +
cos(lat1 * p) * cos(lat2 * p) *
(1 - cos((lon2 - lon1) * p))/2;
return 12742 * asin(sqrt(a));
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: [
GoogleMap(
//Map widget from google_maps_flutter package
zoomGesturesEnabled: true,
//enable Zoom in, out on map
initialCameraPosition: CameraPosition(
//innital position in map
target: startLocation, //initial position
zoom: 8.0, //initial zoom level
),
markers: markers,
//markers to show on map
polylines: Set<Polyline>.of(polylines.values),
//polylines
mapType: MapType.normal,
//map type
onMapCreated: (controller) {
//method called when map is created
if (!mapController.isCompleted) {
mapController.complete(controller);
}
},
),
const SizedBox(
height: 95,
),
Positioned(
bottom: 100,
left: 50,
child: Container(
child: Card(
child: Container(
padding: EdgeInsets.all(20),
child: Text("Total Distance: " + distance.toStringAsFixed(2) + " KM",
style: TextStyle(fontSize: 20, fontWeight:FontWeight.bold))
),
)
)),
/* const SizedBox(
height: 30,
),
Positioned(
bottom: 80,
left: 0,
child: Container(
child: Card(
child: Container(
padding: EdgeInsets.all(20),
child: Text("User Address: " + u_address.toString() ,
style: TextStyle(fontSize: 15, fontWeight:FontWeight.bold,overflow: TextOverflow.ellipsis))
),
)
)),
const SizedBox(
height: 30,
),
Positioned(
bottom: 10,
left: 50,
child: Container(
child: Card(
child: Container(
padding: EdgeInsets.all(20),
child: Text("Total DistanceD: " + distance.toStringAsFixed(2) + " KM",
style: TextStyle(fontSize: 20, fontWeight:FontWeight.bold))
),
)
)),*/
],
)
);
}
}