private void DisposeMapView()
{
VenuesMapView.RemoveAnnotations(VenuesMapView.Annotations);
var mapDelegate = VenuesMapView.WeakDelegate as MapDelegate;
if (mapDelegate != null)
{
mapDelegate.SelectAnnotationCommand = null;
mapDelegate.ShowDetailsCommand = null;
mapDelegate.Dispose();
VenuesMapView.WeakDelegate = null;
}
}
private void InitializeMapView()
{
if (ViewModel.OrgEvent != null &&
ViewModel.OrgEvent.Venues != null)
{
if (!_isMapViewInitialized)
{
VenuesMapView.RemoveAnnotations(VenuesMapView.Annotations);
if (!(VenuesMapView.WeakDelegate is MapDelegate))
{
var mapDelegate = new MapDelegate
{
SelectAnnotationCommand = ViewModel.SelectVenueOnMapCommand,
ShowDetailsCommand = ViewModel.NavigateVenueCommand
};
VenuesMapView.Delegate = mapDelegate;
}
var annotations = ViewModel.OrgEvent.Venues
.SelectMany(v => v.Info.Addresses
.Select(a => new VenueAnnotation(v, a))).ToArray();
var coordinates = MapUtil.GetAnnotationsCoordinates(annotations);
VenuesMapView.SetRegion(MapUtil.CoordinateRegionForCoordinates(coordinates, MapMargin), false);
VenuesMapView.AddAnnotations(annotations);
if (ViewModel.SelectedVenueOnMap != null)
{
SelectVenueMapAnnotation(ViewModel.SelectedVenueOnMap);
}
_isMapViewInitialized = true;
}
}
else
{
VenuesMapView.RemoveAnnotations(VenuesMapView.Annotations);
_isMapViewInitialized = false;
}
}