protected override void OnElementChanged(ElementChangedEventArgs <View> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
var mapModel = (Map)e.OldElement;
MessagingCenter.Unsubscribe <Map, MapSpan>(this, MoveMessageName);
((ObservableCollection <Pin>)mapModel.Pins).CollectionChanged -= OnCollectionChanged;
foreach (Pin pin in mapModel.Pins)
{
pin.PropertyChanged -= PinOnPropertyChanged;
}
}
if (e.NewElement != null)
{
var mapModel = (Map)e.NewElement;
if (Control == null)
{
MKMapView mapView = null;
#if __MOBILE__
if (FormsMaps.IsiOs9OrNewer)
{
// See if we've got an MKMapView available in the pool; if so, use it
mapView = MapPool.Get();
}
#endif
if (mapView == null)
{
// If this is iOS 8 or lower, or if there weren't any MKMapViews in the pool,
// create a new one
mapView = new MKMapView(RectangleF.Empty);
}
SetNativeControl(mapView);
mapView.GetViewForAnnotation = GetViewForAnnotation;
mapView.RegionChanged += MkMapViewOnRegionChanged;
}
MessagingCenter.Subscribe <Map, MapSpan>(this, MoveMessageName, (s, a) => MoveToRegion(a), mapModel);
if (mapModel.LastMoveToRegion != null)
{
MoveToRegion(mapModel.LastMoveToRegion, false);
}
UpdateMapType();
UpdateIsShowingUser();
UpdateHasScrollEnabled();
UpdateHasZoomEnabled();
((ObservableCollection <Pin>)mapModel.Pins).CollectionChanged += OnCollectionChanged;
OnCollectionChanged(((Map)Element).Pins, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
}
protected override void OnElementChanged(ElementChangedEventArgs <View> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
var mapModel = (Map)e.OldElement;
MessagingCenter.Unsubscribe <Map, MapSpan>(this, MoveMessageName);
((ObservableCollection <Pin>)mapModel.Pins).CollectionChanged -= OnPinCollectionChanged;
foreach (Pin pin in mapModel.Pins)
{
pin.PropertyChanged -= PinOnPropertyChanged;
}
((ObservableCollection <MapElement>)mapModel.MapElements).CollectionChanged -= OnMapElementCollectionChanged;
foreach (MapElement mapElement in mapModel.MapElements)
{
mapElement.PropertyChanged -= MapElementPropertyChanged;
}
}
if (e.NewElement != null)
{
var mapModel = (Map)e.NewElement;
if (Control == null)
{
MKMapView mapView = null;
#if __MOBILE__
// See if we've got an MKMapView available in the pool; if so, use it
mapView = MapPool.Get();
#endif
if (mapView == null)
{
// If this is iOS 8 or lower, or if there weren't any MKMapViews in the pool,
// create a new one
mapView = new MKMapView(RectangleF.Empty);
}
SetNativeControl(mapView);
mapView.GetViewForAnnotation = GetViewForAnnotation;
mapView.OverlayRenderer = GetViewForOverlay;
mapView.DidSelectAnnotationView += MkMapViewOnAnnotationViewSelected;
mapView.RegionChanged += MkMapViewOnRegionChanged;
#if __MOBILE__
mapView.AddGestureRecognizer(_mapClickedGestureRecognizer = new UITapGestureRecognizer(OnMapClicked));
#endif
}
MessagingCenter.Subscribe <Map, MapSpan>(this, MoveMessageName, (s, a) => MoveToRegion(a), mapModel);
if (mapModel.LastMoveToRegion != null)
{
MoveToRegion(mapModel.LastMoveToRegion, false);
}
UpdateTrafficEnabled();
UpdateMapType();
UpdateIsShowingUser();
UpdateHasScrollEnabled();
UpdateHasZoomEnabled();
((ObservableCollection <Pin>)mapModel.Pins).CollectionChanged += OnPinCollectionChanged;
OnPinCollectionChanged(mapModel.Pins, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
((ObservableCollection <MapElement>)mapModel.MapElements).CollectionChanged += OnMapElementCollectionChanged;
OnMapElementCollectionChanged(mapModel.MapElements, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
}