public MGLAnnotationView ViewForAnnotation(IMGLAnnotation annotation)
{
if (annotation is MyCustomPointAnnotation)
{
var anno = (MyCustomPointAnnotation)annotation;
if (!anno.WillUseImage)
{
return(null);
}
var reuseIdentifier = "reusableDotView";
// For better performance, always try to reuse existing annotations.
var annotationView = mapView.DequeueReusableAnnotationViewWithIdentifier(reuseIdentifier);
if (annotationView == null)
{
annotationView = new MGLAnnotationView(reuseIdentifier);
annotationView.Frame = new CGRect(0, 0, 30, 30);
annotationView.Layer.CornerRadius = (annotationView.Frame.Size.Width) / 2;
annotationView.Layer.BorderWidth = (nfloat)4.0;
annotationView.Layer.BorderColor = UIColor.White.CGColor;
annotationView.BackgroundColor = new UIColor((nfloat)0.03, (nfloat)0.80, (nfloat)0.69, (nfloat)1.0);
}
return(annotationView);
}
else
{
return(null);
}
}
public MGLAnnotationView ViewForAnnotation(MGLMapView mapView, NSObject annotation)
{
if (annotation is MGLPointAnnotation)
{
var anno = (MGLPointAnnotation)annotation;
var reuseIdentifier = $"{anno.Coordinate.Longitude}";
// For better performance, always try to reuse existing annotations.
var annotationView = mapView.DequeueReusableAnnotationViewWithIdentifier(reuseIdentifier);
if (annotationView == null)
{
annotationView = new CustomAnnotationView(reuseIdentifier);
annotationView.Frame = new CGRect(x: 0, y: 0, width: 40, height: 40);
// Set the annotation view’s background color to a value determined by its longitude.
var hue = anno.Coordinate.Longitude / 100;
annotationView.BackgroundColor = UIColor.FromHSB((nfloat)hue, (nfloat)0.5, (nfloat)1);
}
return(annotationView);
}
else
{
return(null);
}
}
public MGLAnnotationView MapView_ViewForAnnotation(MGLMapView mapView, IMGLAnnotation annotation)
{
var fannotation = Element.Annotations.FirstOrDefault(x => x.NativeHandle == annotation.Handle);
switch (fannotation)
{
case SymbolAnnotation symbol:
if (symbol.IconImage?.Source != null)
{
return null;
}
break;
}
var annotationView = mapView.DequeueReusableAnnotationViewWithIdentifier("draggablePoint");
if (annotationView != null) return annotationView;
var view = new DraggableAnnotationView(reuseIdentifier: "draggablePoint", size: 24);
view.DragFinished += (sender, e) =>
{
var point = new SymbolAnnotation();
point.NativeHandle = annotation.Handle;
point.Coordinates = annotation.Coordinate.ToLatLng();
Element.DragFinishedCommand?.Execute(point);
};
view.AddGestureRecognizer(new UITapGestureRecognizer(tap =>
{
Element.DidTapOnMarkerCommand?.Execute(fannotation.Id);
}));
//mapView.SelectAnnotation(annotation, true, null);
return view;
}
public MGLAnnotationView MapView_ViewForAnnotation(MGLMapView mapView, IMGLAnnotation annotation)
{
var fannotation = Element.Annotations.FirstOrDefault(x => x.NativeHandle == annotation.Handle);
switch (fannotation)
{
case SymbolAnnotation symbol:
if (symbol.IconImage?.Source != null)
{
return(null);
}
break;
}
var annotationView = mapView.DequeueReusableAnnotationViewWithIdentifier("draggablePoint");
if (annotationView != null)
{
return(annotationView);
}
var view = new DraggableAnnotationView(reuseIdentifier: "draggablePoint", size: 24);
view.DragFinished += (sender, e) =>
{
var point = new SymbolAnnotation();
point.NativeHandle = annotation.Handle;
point.Coordinates = annotation.Coordinate.ToLatLng();
Element.DragFinishedCommand?.Execute(point);
};
return(view);
}
