private void BindToElement(Map map)
{
if (map != null)
{
NativeMap.CameraChange += NativeMap_CameraChange;
NativeMap.MarkerClick += NativeMap_MarkerClick;
map.PinsInternal.CollectionChanged += OnPinsCollectionChanged;
map.PolylinesInternal.CollectionChanged += OnPolylinesCollectionChanged;
MessagingCenter.Subscribe<XamMapz.Map, MapMessage>(this, MapMessage.Message, (sender, message) =>
{
// Handle only messages sent by Element
if (sender != MapEx)
return;
OnMapMessage(sender, message);
});
}
}
private void UnbindFromElement(Map map)
{
if (map != null)
{
MessagingCenter.Unsubscribe<Map, MapMessage>(this, MapMessage.Message);
NativeMap.CameraChange -= NativeMap_CameraChange;
NativeMap.MarkerClick -= NativeMap_MarkerClick;
map.PinsInternal.CollectionChanged -= OnPinsCollectionChanged;
map.PolylinesInternal.CollectionChanged -= OnPolylinesCollectionChanged;
foreach (var polyline in map.Polylines)
{
polyline.PositionChanged -= polyline_PositionChanged;
polyline.PropertyChanged -= polyline_PropertyChanged;
}
foreach (var pin in map.Pins)
{
pin.PropertyChanged -= pin_PropertyChanged;
}
}
}
protected virtual void OnMapMessage(Map map, MapMessage message)
{
if (message is ZoomMessage)
{
//var msg = (ZoomMessage)message;
UpdateRegion();
}
else if (message is ProjectionMessage)
{
var msg = (ProjectionMessage)message;
var screenPos = NativeMap.Projection.ToScreenLocation(msg.Position.ToLatLng());
msg.ScreenPosition = new Point(screenPos.X, screenPos.Y);
}
else if (message is MoveMessage)
{
var msg = (MoveMessage)message;
UpdateGoogleMap(formsMap =>
{
var cameraUpdate = CameraUpdateFactory.NewLatLng(msg.Target.ToLatLng());
NativeMap.MoveCamera(cameraUpdate);
});
}
}