Created
September 13, 2021 07:11
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getAllTheDistanceCover(String addressOne, String addressTwo) async { | |
isCalculating = true; | |
update(); | |
List<Location> startAddress = | |
await locationFromAddress(addressOne, localeIdentifier: "en"); | |
List<Location> destinationAddress = | |
await locationFromAddress(addressTwo, localeIdentifier: "en"); | |
await _createPolylines(startAddress[0], destinationAddress[0]); | |
double sum = totalDistanceCovered(); | |
isCalculating = false; | |
distanceCal = sum; | |
totalDistance = sum.ceil(); | |
logisticsTotal(sum); | |
update(); | |
} | |
// Sets the delivery type and update the UI | |
void selectDeliveryType(bool value) { | |
isRegular = value; | |
if (isRegular) { | |
service.deliveryType = "Regular"; | |
} else { | |
service.deliveryType = "Premium"; | |
} | |
logisticsType(); | |
update(); | |
} | |
_createPolylines(Location start, Location destination) async { | |
// Initializing PolylinePoints | |
polylinePoints = PolylinePoints(); | |
// Generating the list of coordinates to be used for | |
// drawing the polylines | |
PolylineResult result = await polylinePoints.getRouteBetweenCoordinates( | |
ApiKeys.MapsKey, // Google Maps API Key | |
PointLatLng(start.latitude, start.longitude), | |
PointLatLng(destination.latitude, destination.longitude), | |
travelMode: TravelMode.driving, | |
); | |
if (result.points.isNotEmpty) { | |
polylineCoordinates = []; | |
result.points.forEach((PointLatLng point) { | |
polylineCoordinates.add(LatLng(point.latitude, point.longitude)); | |
}); | |
update(); | |
} | |
} | |
double _coordinateDistance(lat1, lon1, lat2, lon2) { | |
var p = 0.017453292519943295; | |
var c = cos; | |
var a = 0.5 - | |
c((lat2 - lat1) * p) / 2 + | |
c(lat1 * p) * c(lat2 * p) * (1 - c((lon2 - lon1) * p)) / 2; | |
return 12742 * asin(sqrt(a)); | |
} | |
double totalDistanceCovered() { | |
double totalDistance = 0; | |
for (int i = 0; i < polylineCoordinates.length - 1; i++) { | |
totalDistance += _coordinateDistance( | |
polylineCoordinates[i].latitude, | |
polylineCoordinates[i].longitude, | |
polylineCoordinates[i + 1].latitude, | |
polylineCoordinates[i + 1].longitude, | |
); | |
} | |
return totalDistance; | |
} | |
void logisticsTotal(double distance) { | |
totalPrice = (flatRateValue * logBaseValue).toDouble(); | |
print("totalPrice"); | |
if (distance > logBaseValue) { | |
totalPrice = (flatRateValue * logBaseValue).toDouble() + | |
((distance.ceil().toInt() - logBaseValue) * logNextPrice); | |
} | |
if (!isRegular) { | |
totalPrice = totalPrice + premiumCharge; | |
} | |
update(); | |
} |
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