void DrawStepForIndex(int index, bool needZoom = true)
{
if (currentDirectionAnnotation != null && index == currentStepIndex)
{
return;
}
currentStepIndex = index;
// mapView.RemoveAnnotations (listStepAnnotation.ToArray ());
// listStepAnnotation.Clear ();
RouteItem item = ViewModel.Routes [index];
CLLocationCoordinate2D coordinate = new CLLocationCoordinate2D(item.Lat, item.Long);
// StepAnnotation annotation = new StepAnnotation ();
//
// annotation.SetCoordinate (coordinate);
// mapView.AddAnnotation (annotation);
// listStepAnnotation.Add (annotation);
if (needZoom)
{
MKCoordinateRegion region = MKCoordinateRegion.FromDistance(coordinate, 400, 400);
mapView.SetRegion(region, true);
// mapView.SetCenterCoordinate (coordinate, true);
}
if (currentDirectionAnnotation != null)
{
mapView.RemoveAnnotation(currentDirectionAnnotation);
}
currentDirectionAnnotation = null;
DirectionAnnotation nextDirectionAnnotation = new DirectionAnnotation();
nextDirectionAnnotation.SetCoordinate(coordinate);
if (currentStepIndex < ViewModel.Routes.Count - 1)
{
RouteItem nextItem = ViewModel.Routes [index + 1];
CLLocationCoordinate2D nextCoordinate = new CLLocationCoordinate2D(nextItem.Lat, nextItem.Long);
nextDirectionAnnotation.CurAngle = CalcBearing(coordinate, nextCoordinate).ToRad();
}
else
{
if (desCoordinate.IsValid())
{
nextDirectionAnnotation.SetCoordinate(desCoordinate);
nextDirectionAnnotation.CurAngle = CalcBearing(coordinate, desCoordinate).ToRad();
}
}
mapView.AddAnnotation(nextDirectionAnnotation);
currentDirectionAnnotation = nextDirectionAnnotation;
}
public MKAnnotationView GetViewForAnnotation(MKMapView mapView, IMKAnnotation annotation)
{
if (annotation is MKUserLocation)
{
return(null);
}
if (annotation is StepAnnotation)
{
var annotationView = mapView.DequeueReusableAnnotation("StepAnnotation") as MKPinAnnotationView;
if (annotationView == null)
{
annotationView = new MKPinAnnotationView(annotation, "StepAnnotation");
}
annotationView.Annotation = annotation;
annotationView.PinColor = MKPinAnnotationColor.Green;
return(annotationView);
}
if (annotation is DestinationAnnotation)
{
var annotationView = mapView.DequeueReusableAnnotation("DesinationAnnotation") as MKPinAnnotationView;
if (annotationView == null)
{
annotationView = new MKPinAnnotationView(annotation, "DesinationAnnotation");
}
annotationView.Annotation = annotation;
annotationView.PinColor = MKPinAnnotationColor.Purple;
return(annotationView);
}
if (annotation is DirectionAnnotation)
{
DirectionAnnotation directionAnnotation = annotation as DirectionAnnotation;
var annotationView = mapView.DequeueReusableAnnotation("DirectionAnnotation") as MKAnnotationView;
if (annotationView == null)
{
annotationView = new MKAnnotationView(annotation, "DirectionAnnotation");
annotationView.Image = UIImage.FromFile("small_blue_icon_navigate.png");
}
annotationView.Annotation = annotation;
CGAffineTransform transform = CGAffineTransform.MakeRotation((nfloat)directionAnnotation.CurAngle + lastAngle);
annotationView.Transform = transform;
return(annotationView);
}
return(null);
}
public void EndNavigation()
{
mapView.RemoveOverlays(mapView.Overlays);
mapView.RemoveAnnotations(mapView.Annotations);
currentDirectionAnnotation = null;
if (destinationAnnotation != null)
{
mapView.AddAnnotation(destinationAnnotation);
destinationAnnotation = null;
}
mapView.SetRegion(overviewRegion, true);
}
public void ChangeNavigationMode()
{
if (!ViewModel.IsNavigating)
{
// overview
if (currentDirectionAnnotation != null)
{
mapView.RemoveAnnotation(currentDirectionAnnotation);
}
currentDirectionAnnotation = null;
mapView.SetRegion(overviewRegion, true);
}
else
{
//resume
DrawStepForIndex(currentStepIndex, true);
}
}
