void OnMapLongPress()
{
if (longPressGestureRecognizer.State != UIGestureRecognizerState.Began)
{
return;
}
CGPoint pixelLocation = longPressGestureRecognizer.LocationInView(NativeMapView);
CLLocationCoordinate2D coordinate = NativeMapView.ConvertPoint(pixelLocation, NativeMapView);
//add map annotation
MKPointAnnotation annotation = new MKPointAnnotation();
annotation.Coordinate = coordinate;
annotation.Title = string.Format("{0},{1}", coordinate.Latitude, coordinate.Longitude);
NativeMapView.AddAnnotation(annotation);
annotationsList.Add(annotation);
}
protected override void OnElementChanged(Xamarin.Forms.Platform.Android.ElementChangedEventArgs <Xamarin.Forms.Maps.Map> e)
{
try
{
base.OnElementChanged(e);
}
catch (Java.Lang.SecurityException exception)
{
//Newer versions of android OS allow users to set location permissions at runtime which can cause a security exception
//we will catch it here and continue as we check for the appropriete permissions when needed
System.Diagnostics.Debug.WriteLine(exception.Message);
}
if (e.OldElement != null)
{
if (googleMap != null)
{
googleMap.MapLongClick -= OnMapLongClick;
googleMap.InfoWindowClick -= OnMapMarkerInfoWindowClick;
}
CustomMap oldCustomMap = e.OldElement as CustomMap;
oldCustomMap.CalculateRouteFromUserLocationNativeHandler -= CalculateRouteFromUserLocation;
oldCustomMap.CalculateRouteNativeHandler -= CalculateRoute;
oldCustomMap.ClearRouteNativeHandler -= ClearRoute;
oldCustomMap.CenterOnUsersLocationNativeHandler -= CenterOnUsersLocation;
oldCustomMap.SearchLocalNativeHandler -= SearchLocal;
}
if (e.NewElement != null)
{
CustomMap newCustomMap = e.NewElement as CustomMap;
newCustomMap.CalculateRouteFromUserLocationNativeHandler += CalculateRouteFromUserLocation;
newCustomMap.CalculateRouteNativeHandler += CalculateRoute;
newCustomMap.ClearRouteNativeHandler += ClearRoute;
newCustomMap.CenterOnUsersLocationNativeHandler += CenterOnUsersLocation;
newCustomMap.SearchLocalNativeHandler += SearchLocal;
//UpdateShowTraffic();
NativeMapView.GetMapAsync(this);
}
}
void CalculateRouteFromUserLocation(object sender, EventArgs e)
{
CLLocationCoordinate2D destinationLocation = new CLLocationCoordinate2D(CustomMapView.RouteDestination.Latitude, CustomMapView.RouteDestination.Longitude);
MKPlacemark destinationPlacemark = new MKPlacemark(coordinate: destinationLocation);
sourceMapItem = MKMapItem.MapItemForCurrentLocation();
destinationMapItem = new MKMapItem(destinationPlacemark);
MKPointAnnotation destinationAnnotation = new MKPointAnnotation();
//destinationAnnotation.Title = "Destination";
destinationAnnotation.Coordinate = destinationPlacemark.Location.Coordinate;
//save annotations so they can be removed later if requested
annotationsList.Add(destinationAnnotation);
NativeMapView.AddAnnotation(destinationAnnotation);
CalculateRouteDetails();
}
protected override void OnElementChanged(Xamarin.Forms.Platform.iOS.ElementChangedEventArgs <View> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
NativeMapView.OverlayRenderer = null;
NativeMapView.DidUpdateUserLocation -= OnUserLocationUpdated;
NativeMapView.GetViewForAnnotation -= GetViewForAnnotation;
NativeMapView.RemoveGestureRecognizer(longPressGestureRecognizer);
CustomMap oldCustomMap = e.OldElement as CustomMap;
oldCustomMap.CalculateRouteFromUserLocationNativeHandler -= CalculateRouteFromUserLocation;
oldCustomMap.CalculateRouteNativeHandler -= CalculateRoute;
oldCustomMap.ClearRouteNativeHandler -= ClearRoute;
oldCustomMap.CenterOnUsersLocationNativeHandler -= CenterOnUsersLocation;
oldCustomMap.SearchLocalNativeHandler -= SearchLocal;
}
if (e.NewElement != null)
{
NativeMapView.OverlayRenderer = GetOverlayRenderer;
NativeMapView.DidUpdateUserLocation += OnUserLocationUpdated;
NativeMapView.GetViewForAnnotation += GetViewForAnnotation;
NativeMapView.AddGestureRecognizer(longPressGestureRecognizer);
CustomMap newCustomMap = e.NewElement as CustomMap;
newCustomMap.CalculateRouteFromUserLocationNativeHandler += CalculateRouteFromUserLocation;
newCustomMap.CalculateRouteNativeHandler += CalculateRoute;
newCustomMap.ClearRouteNativeHandler += ClearRoute;
newCustomMap.CenterOnUsersLocationNativeHandler += CenterOnUsersLocation;
newCustomMap.SearchLocalNativeHandler += SearchLocal;
UpdateShowTraffic();
}
}
void SearchLocal(object sender, EventArgs e)
{
MKLocalSearchRequest request = new MKLocalSearchRequest();
request.NaturalLanguageQuery = CustomMapView.SearchText;
request.Region = NativeMapView.Region;
MKLocalSearch search = new MKLocalSearch(request);
search.Start((MKLocalSearchResponse response, Foundation.NSError error) =>
{
if (error != null)
{
System.Diagnostics.Debug.WriteLine(error.Description);
}
else if (response.MapItems.Length == 0)
{
System.Diagnostics.Debug.WriteLine("No matches found for search: " + CustomMapView.SearchText);
}
else
{
ClearRoute(null, null);
foreach (MKMapItem mapItem in response.MapItems)
{
MKPointAnnotation annotation = new MKPointAnnotation();
annotation.Coordinate = mapItem.Placemark.Coordinate;
annotation.Title = mapItem.Name;
annotationsList.Add(annotation);
}
NativeMapView.ShowAnnotations(annotationsList.ToArray(), true);
}
});
}
void CalculateRouteDetails(bool zoomMapToShowFullRoute = true, bool requestAlternateRoutes = true, MKDirectionsTransportType transportType = MKDirectionsTransportType.Automobile)
{
MKDirectionsRequest directionRequest = new MKDirectionsRequest();
directionRequest.Source = sourceMapItem;
directionRequest.Destination = destinationMapItem;
directionRequest.RequestsAlternateRoutes = requestAlternateRoutes;
directionRequest.TransportType = transportType;
MKDirections eta = new MKDirections(directionRequest);
eta.CalculateETA((MKETAResponse response, Foundation.NSError error) =>
{
if (error != null)
{
System.Diagnostics.Debug.WriteLine(error.Description);
}
else
{
TimeSpan time = TimeSpan.FromSeconds(response.ExpectedTravelTime);
System.Diagnostics.Debug.WriteLine(time.ToString(@"hh\:mm\:ss\:fff"));
}
});
MKDirections directions = new MKDirections(directionRequest);
directions.CalculateDirections((MKDirectionsResponse response, Foundation.NSError error) =>
{
if (error != null)
{
System.Diagnostics.Debug.WriteLine(error.Description);
}
else
{
//remove previous route overlays
ClearOverlays();
currentRouteOverlay = response.Routes[0].Polyline;
MKRoute route;
//loop through backwards so first most route is renderered on top
for (int i = response.Routes.Length - 1; i >= 0; i--)
{
route = response.Routes[i];
//save overlay so it can be removed later if requested
overlaysList.Add(route.Polyline);
NativeMapView.AddOverlay(route.Polyline, MKOverlayLevel.AboveRoads);
if (i == 0)
{
if (zoomMapToShowFullRoute)
{
MKMapRect rect = route.Polyline.BoundingMapRect;
MKMapRect expandedRect = NativeMapView.MapRectThatFits(rect, new UIEdgeInsets(20, 20, 20, 20));
NativeMapView.SetRegion(MKCoordinateRegion.FromMapRect(expandedRect), true);
}
}
}
}
});
}
