public override void ViewDidLoad()
{
base.ViewDidLoad();
// Create a random set of map locations
List<IMKAnnotation> sampleAnnotations = new List<IMKAnnotation>();
Random rnd = new Random();
for (int i = 1; i <= 500; i++)
{
double lat = 51.7 + rnd.NextDouble();
double lon = 4.3 + rnd.NextDouble();
var annotation = new BasicMapAnnotation(new CLLocationCoordinate2D(lat, lon), "Marker " + i);
sampleAnnotations.Add(annotation);
}
// Setup clustering manager
FBClusteringManager clusteringManager = new FBClusteringManager(sampleAnnotations);
// Setup map region to display initially
CLLocationCoordinate2D center = new CLLocationCoordinate2D(52.2, 4.8);
MKCoordinateRegion region = MKCoordinateRegion.FromDistance(center, 200000, 200000);
MapView.SetRegion(region, false);
// As the map moves, use the clusting manager update the clusters displayed on the map
MapView.RegionChanged += (object sender, MKMapViewChangeEventArgs e) =>
{
double scale = MapView.Bounds.Size.Width / MapView.VisibleMapRect.Size.Width;
List<IMKAnnotation> annotationsToDisplay = clusteringManager.ClusteredAnnotationsWithinMapRect(MapView.VisibleMapRect, scale);
clusteringManager.DisplayAnnotations(annotationsToDisplay, MapView);
};
// Display a custom icon for the clusters
MapView.GetViewForAnnotation += (mapView, annotation) =>
{
MKAnnotationView anView;
if (annotation is FBAnnotationCluster)
{
FBAnnotationCluster annotationcluster = (FBAnnotationCluster)annotation;
anView = (MKAnnotationView)mapView.DequeueReusableAnnotation(kClusterAnnotationId);
UILabel label = null;
if (anView == null)
{
// nicely format the cluster icon and display the number of items in it
anView = new MKAnnotationView(annotation, kClusterAnnotationId);
anView.Image = UIImage.FromBundle("cluster");
label = new UILabel(new CGRect(0, 0, anView.Image.Size.Width, anView.Image.Size.Height));
label.Tag = kTagClusterLabel;
label.TextAlignment = UITextAlignment.Center;
label.TextColor = UIColor.White;
anView.AddSubview(label);
anView.CanShowCallout = false;
}
else
{
label = (UILabel)anView.ViewWithTag(kTagClusterLabel);
}
label.Text = annotationcluster.Annotations.Count.ToString();
return anView;
}
return null;
};
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// Create a random set of map locations
List <IMKAnnotation> sampleAnnotations = new List <IMKAnnotation>();
Random rnd = new Random();
for (int i = 1; i <= 500; i++)
{
double lat = 51.7 + rnd.NextDouble();
double lon = 4.3 + rnd.NextDouble();
var annotation = new BasicMapAnnotation(new CLLocationCoordinate2D(lat, lon), "Marker " + i);
sampleAnnotations.Add(annotation);
}
// Setup clustering manager
FBClusteringManager clusteringManager = new FBClusteringManager(sampleAnnotations);
// Setup map region to display initially
CLLocationCoordinate2D center = new CLLocationCoordinate2D(52.2, 4.8);
MKCoordinateRegion region = MKCoordinateRegion.FromDistance(center, 200000, 200000);
MapView.SetRegion(region, false);
// As the map moves, use the clusting manager update the clusters displayed on the map
MapView.RegionChanged += (object sender, MKMapViewChangeEventArgs e) =>
{
double scale = MapView.Bounds.Size.Width / MapView.VisibleMapRect.Size.Width;
List <IMKAnnotation> annotationsToDisplay = clusteringManager.ClusteredAnnotationsWithinMapRect(MapView.VisibleMapRect, scale);
clusteringManager.DisplayAnnotations(annotationsToDisplay, MapView);
};
// Display a custom icon for the clusters
MapView.GetViewForAnnotation += (mapView, annotation) =>
{
MKAnnotationView anView;
if (annotation is FBAnnotationCluster)
{
FBAnnotationCluster annotationcluster = (FBAnnotationCluster)annotation;
anView = (MKAnnotationView)mapView.DequeueReusableAnnotation(kClusterAnnotationId);
UILabel label = null;
if (anView == null)
{
// nicely format the cluster icon and display the number of items in it
anView = new MKAnnotationView(annotation, kClusterAnnotationId);
anView.Image = UIImage.FromBundle("cluster");
label = new UILabel(new CGRect(0, 0, anView.Image.Size.Width, anView.Image.Size.Height));
label.Tag = kTagClusterLabel;
label.TextAlignment = UITextAlignment.Center;
label.TextColor = UIColor.White;
anView.AddSubview(label);
anView.CanShowCallout = false;
}
else
{
label = (UILabel)anView.ViewWithTag(kTagClusterLabel);
}
label.Text = annotationcluster.Annotations.Count.ToString();
return(anView);
}
return(null);
};
}
