void MapRegionChanged(object sender, MKMapViewChangeEventArgs e)
{
var current = new Dictionary <string, AirportAnnotation> ();
var added = new List <AirportAnnotation> ();
// Query for the list of airports in the new region
foreach (var airport in GetAirports(mapView.Region))
{
AirportAnnotation annotation;
if (annotations.ContainsKey(airport.FAA))
{
// This airport is already in view...
annotation = annotations[airport.FAA];
annotation.UserCoordinates = coordinates;
annotations.Remove(airport.FAA);
}
else
{
// This is a new annotation, keep track of it in 'added'
annotation = new AirportAnnotation(airport, coordinates);
added.Add(annotation);
}
current.Add(annotation.Airport.FAA, annotation);
}
if (annotations.Count > 0)
{
// Remove annotations that are no longer in view
mapView.RemoveAnnotations(annotations.Values.ToArray());
foreach (var annotation in annotations.Values)
{
annotation.Dispose();
}
annotations.Clear();
}
if (added.Count > 0)
{
mapView.AddAnnotations(added.ToArray());
foreach (var annotation in added)
{
annotation.Dispose();
}
}
annotations = current;
}
void MapRegionChanged(object sender, MKMapViewChangeEventArgs e)
{
Dictionary <string, AirportAnnotation> current = new Dictionary <string, AirportAnnotation> ();
List <AirportAnnotation> added = new List <AirportAnnotation> ();
// Query for the list of airports in the new region
foreach (var airport in Airports.GetAirports(mapView.Region))
{
AirportAnnotation aa;
if (annotations.ContainsKey(airport.FAA))
{
// This airport is already in view...
aa = annotations[airport.FAA];
annotations.Remove(airport.FAA);
}
else
{
// This is a new annotation, keep track of it in 'added'
aa = new AirportAnnotation(airport);
added.Add(aa);
}
current.Add(aa.Airport.FAA, aa);
}
if (annotations.Count > 0)
{
// Remove annotations that are no longer in view
mapView.RemoveAnnotations(annotations.Values.ToArray());
annotations.Clear();
}
if (added.Count > 0)
{
mapView.AddAnnotation(added.ToArray());
added.Clear();
}
annotations = current;
}
void MapRegionChanged(object sender, MKMapViewChangeEventArgs e)
{
Dictionary<string, AirportAnnotation> current = new Dictionary<string, AirportAnnotation> ();
List<AirportAnnotation> added = new List<AirportAnnotation> ();
// Query for the list of airports in the new region
foreach (var airport in Airports.GetAirports (mapView.Region)) {
AirportAnnotation aa;
if (annotations.ContainsKey (airport.FAA)) {
// This airport is already in view...
aa = annotations[airport.FAA];
annotations.Remove (airport.FAA);
} else {
// This is a new annotation, keep track of it in 'added'
aa = new AirportAnnotation (airport);
added.Add (aa);
}
current.Add (aa.Airport.FAA, aa);
}
if (annotations.Count > 0) {
// Remove annotations that are no longer in view
mapView.RemoveAnnotations (annotations.Values.ToArray ());
annotations.Clear ();
}
if (added.Count > 0) {
mapView.AddAnnotation (added.ToArray ());
added.Clear ();
}
annotations = current;
}
void MapRegionChanged(object sender, MKMapViewChangeEventArgs e)
{
var current = new Dictionary<string, AirportAnnotation> ();
var added = new List<AirportAnnotation> ();
// Query for the list of airports in the new region
foreach (var airport in GetAirports (mapView.Region)) {
AirportAnnotation annotation;
if (annotations.ContainsKey (airport.FAA)) {
// This airport is already in view...
annotation = annotations[airport.FAA];
annotation.UserCoordinates = coordinates;
annotations.Remove (airport.FAA);
} else {
// This is a new annotation, keep track of it in 'added'
annotation = new AirportAnnotation (airport, coordinates);
added.Add (annotation);
}
current.Add (annotation.Airport.FAA, annotation);
}
if (annotations.Count > 0) {
// Remove annotations that are no longer in view
mapView.RemoveAnnotations (annotations.Values.ToArray ());
foreach (var annotation in annotations.Values)
annotation.Dispose ();
annotations.Clear ();
}
if (added.Count > 0) {
mapView.AddAnnotations (added.ToArray ());
foreach (var annotation in added)
annotation.Dispose ();
}
annotations = current;
}
