public bool OnMarkerClick(Marker marker)
{
Pin clickedMarker = _SharedControl.Pins.FirstOrDefault(p => (string)p.Id == marker.Id);
SKPin drawableMarker = clickedMarker as SKPin;
return(drawableMarker?.Clickable ?? false);
}
internal async void UpdateImage()
{
SKPin pin = _SkiaAnnotation?.SharedPin;
UIImage image;
CancellationTokenSource renderCts = new CancellationTokenSource();
_imageUpdateCts?.Cancel();
_imageUpdateCts = renderCts;
try
{
image = await RenderPinAsync(pin, renderCts.Token).ConfigureAwait(false);
renderCts.Token.ThrowIfCancellationRequested();
Device.BeginInvokeOnMainThread(() =>
{
if (!renderCts.IsCancellationRequested)
{
Image = image;
Bounds = new CGRect(CGPoint.Empty, new CGSize(pin.Width, pin.Height));
}
});
}
catch (OperationCanceledException)
{
// Ignore
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Failed to render pin annotation: \n" + e);
}
}
private void OnPinInvalidateRequested(object sender, SKPin.MapMarkerInvalidateEventArgs args)
{
SKPin pin = sender as SKPin;
Marker marker = GetMarkerForPin(pin);
UpdateMarkerIcon(pin, marker);
}
public SKPinAnnotation(SKPin pin)
{
SharedPin = pin;
Title = pin.Label;
Subtitle = pin.Address;
Coordinate = pin.Position.ToLocationCoordinate();
}
private void UpdateAnnotationIcon(SKPin pin)
{
IMKAnnotation annotation = FindAnnotationForPin(pin);
MKAnnotationView view = _NativeControl.ViewForAnnotation(annotation);
SKPinAnnotationView skPinView = view as SKPinAnnotationView;
skPinView?.UpdateImage();
skPinView?.UpdateAnchor();
}
private void OnPinInvalidateRequested(object sender, SKPin.MapMarkerInvalidateEventArgs args)
{
SKPin pin = sender as SKPin;
if (pin != null)
{
UpdateAnnotationIcon(pin);
}
}
private void OnPinPropertyChanged(object sender, PropertyChangedEventArgs args)
{
Pin pin = sender as Pin;
SKPin skiaPin = pin as SKPin;
MKPointAnnotation annotation = FindAnnotationForPin(pin) as MKPointAnnotation;
if (skiaPin != null)
{
if (args.PropertyName == SKPin.WidthProperty.PropertyName ||
args.PropertyName == SKPin.HeightProperty.PropertyName)
{
UpdateAnnotationIcon(skiaPin);
}
else if (args.PropertyName == SKPin.AnchorXProperty.PropertyName ||
args.PropertyName == SKPin.AnchorYProperty.PropertyName)
{
MKAnnotationView view = _NativeControl.ViewForAnnotation(annotation);
SKPinAnnotationView skPinView = view as SKPinAnnotationView;
skPinView?.UpdateAnchor();
}
else if (args.PropertyName == SKPin.IsVisibleProperty.PropertyName)
{
MKAnnotationView view = _NativeControl.ViewForAnnotation(annotation);
if (view != null)
{
view.Hidden = !skiaPin.IsVisible;
}
}
else if (args.PropertyName == SKPin.ClickableProperty.PropertyName)
{
MKAnnotationView view = _NativeControl.ViewForAnnotation(annotation);
if (view != null)
{
view.Enabled = !skiaPin.Clickable;
}
}
}
if (pin != null && annotation != null)
{
if (args.PropertyName == Pin.LabelProperty.PropertyName)
{
annotation.Title = pin.Label;
}
else if (args.PropertyName == Pin.AddressProperty.PropertyName)
{
annotation.Subtitle = pin.Address;
}
else if (args.PropertyName == Pin.PositionProperty.PropertyName)
{
annotation.Coordinate = pin.Position.ToLocationCoordinate();
}
}
}
private SKPixmap DrawMarker(SKPin sharedMarker)
{
double bitmapWidth = sharedMarker.Width * Context.Resources.DisplayMetrics.Density;
double bitmapHeight = sharedMarker.Height * Context.Resources.DisplayMetrics.Density;
SKSurface surface = SKSurface.Create((int)bitmapWidth, (int)bitmapHeight, SKColorType.Rgba8888, SKAlphaType.Premul);
surface.Canvas.Clear(SKColor.Empty);
sharedMarker.DrawPin(surface);
return(surface.PeekPixels());
}
protected override MarkerOptions CreateMarker(Pin pin)
{
MarkerOptions options = base.CreateMarker(pin);
if (pin is SKPin)
{
SKPin sharedMarker = pin as SKPin;
SKPixmap markerBitmap = DrawMarker(sharedMarker);
options.SetIcon(BitmapDescriptorFactory.FromBitmap(markerBitmap.ToBitmap()))
.Visible(sharedMarker.IsVisible);
options.Anchor((float)sharedMarker.AnchorX, (float)sharedMarker.AnchorY);
}
return(options);
}
private Task <UIImage> RenderPinAsync(SKPin pin, CancellationToken token = default(CancellationToken))
{
return(Task.Run(() =>
{
double bitmapWidth = pin.Width * _screenDensity;
double bitmapHeight = pin.Height * _screenDensity;
using (SKSurface surface = SKSurface.Create((int)bitmapWidth, (int)bitmapHeight, SKColorType.Rgba8888, SKAlphaType.Premul))
{
surface.Canvas.Clear(SKColor.Empty);
pin.DrawPin(surface);
return surface.PeekPixels().ToUIImage();
}
}, token));
}
private MKAnnotationView GetViewForPin(MKMapView mapView, IMKAnnotation annotation)
{
SKPinAnnotation skiaAnnotation = annotation as SKPinAnnotation;
if (skiaAnnotation != null)
{
SKPin pin = skiaAnnotation.SharedPin;
SKPinAnnotationView pinView = mapView.DequeueReusableAnnotation(SKPinAnnotationView.ViewIdentifier) as SKPinAnnotationView
?? CreateAnnotationView(skiaAnnotation);
pinView.Annotation = skiaAnnotation;
pinView.UpdateImage();
pinView.UpdateAnchor();
pinView.Hidden = !pin.IsVisible;
pinView.Enabled = !pin.Clickable;
return(pinView);
}
return(null);
}
private void OnPinPropertyChanged(object sender, PropertyChangedEventArgs args)
{
SKPin pin = sender as SKPin;
Marker marker = GetMarkerForPin(pin);
if (pin != null)
{
if (args.PropertyName == SKPin.WidthProperty.PropertyName ||
args.PropertyName == SKPin.HeightProperty.PropertyName)
{
UpdateMarkerIcon(pin, marker);
}
else if (args.PropertyName == SKPin.AnchorXProperty.PropertyName ||
args.PropertyName == SKPin.AnchorYProperty.PropertyName)
{
marker.SetAnchor((float)pin.AnchorX, (float)pin.AnchorY);
}
else if (args.PropertyName == SKPin.IsVisibleProperty.PropertyName)
{
marker.Visible = pin.IsVisible;
}
}
}
private void UpdateMarkerIcon(SKPin pin, Marker marker)
{
SKPixmap markerBitmap = DrawMarker(pin);
marker.SetIcon(BitmapDescriptorFactory.FromBitmap(markerBitmap.ToBitmap()));
}
