void CircleOnPropertyChanged(Circle formsCircle, PropertyChangedEventArgs e)
{
var nativeCircle = GetNativeCircle(formsCircle);
if (nativeCircle == null)
{
return;
}
if (e.PropertyName == Circle.FillColorProperty.PropertyName)
{
nativeCircle.FillColor = formsCircle.FillColor.ToAndroid();
}
else if (e.PropertyName == Circle.CenterProperty.PropertyName)
{
nativeCircle.Center = new LatLng(formsCircle.Center.Latitude, formsCircle.Center.Longitude);
}
else if (e.PropertyName == Circle.RadiusProperty.PropertyName)
{
nativeCircle.Radius = formsCircle.Radius.Meters;
}
else if (e.PropertyName == MapElement.StrokeColorProperty.PropertyName)
{
nativeCircle.StrokeColor = formsCircle.StrokeColor.ToAndroid();
}
else if (e.PropertyName == MapElement.StrokeWidthProperty.PropertyName)
{
nativeCircle.StrokeWidth = formsCircle.StrokeWidth;
}
}
void RemoveCircle(Circle circle)
{
var native = GetNativeCircle(circle);
if (native != null)
{
native.Remove();
_circles.Remove(native);
}
}
protected Circle GetFormsCircle(ACircle circle)
{
Circle targetCircle = null;
for (int i = 0; i < Element.MapElements.Count; i++)
{
var mapElement = Element.MapElements[i];
if ((string)mapElement.MapElementId == circle.Id)
{
targetCircle = mapElement as Circle;
break;
}
}
return(targetCircle);
}
public MapElementsGallery()
{
InitializeComponent();
Map.MoveToRegion(
MapSpan.FromCenterAndRadius(
new Position(39.828152, -98.569817),
Distance.FromMiles(1681)));
_polyline = new Maps.Polyline
{
Geopath =
{
new Position(47.641944, -122.127222),
new Position(37.411625, -122.071327),
new Position(35.138901, -80.922623)
}
};
_polygon = new Maps.Polygon
{
StrokeColor = Color.FromHex("#002868"),
FillColor = Color.FromHex("#88BF0A30"),
Geopath =
{
new Position(37, -102.05),
new Position(37, -109.05),
new Position(41, -109.05),
new Position(41, -102.05)
}
};
_circle = new Circle
{
Center = new Position(42.352364, -71.067177),
Radius = Distance.FromMiles(100.0),
StrokeColor = Color.FromRgb(31, 174, 206),
FillColor = Color.FromRgba(31, 174, 206, 127)
};
Map.MapElements.Add(_polyline);
Map.MapElements.Add(_polygon);
Map.MapElements.Add(_circle);
ElementPicker.SelectedIndex = 0;
}
void AddClicked(object sender, EventArgs e)
{
switch (_selectedType)
{
case SelectedElementType.Polyline:
Map.MapElements.Add(_polyline = new Maps.Polyline());
break;
case SelectedElementType.Polygon:
Map.MapElements.Add(_polygon = new Maps.Polygon());
break;
case SelectedElementType.Circle:
Map.MapElements.Add(_circle = new Circle());
break;
}
}
protected ACircle GetNativeCircle(Circle circle)
{
ACircle targetCircle = null;
if (_circles != null)
{
for (int i = 0; i < _circles.Count; i++)
{
var native = _circles[i];
if (native.Id == (string)circle.MapElementId)
{
targetCircle = native;
break;
}
}
}
return(targetCircle);
}
protected virtual CircleOptions CreateCircleOptions(Circle circle)
{
var opts = new CircleOptions()
.InvokeCenter(new LatLng(circle.Center.Latitude, circle.Center.Longitude))
.InvokeRadius(circle.Radius.Meters)
.InvokeStrokeWidth(circle.StrokeWidth);
if (!circle.StrokeColor.IsDefault())
{
opts.InvokeStrokeColor(circle.StrokeColor.ToAndroid());
}
if (!circle.FillColor.IsDefault())
{
opts.InvokeFillColor(circle.FillColor.ToAndroid());
}
return(opts);
}
void AddCircle(Circle circle)
{
var map = NativeMap;
if (map == null)
{
return;
}
if (_circles == null)
{
_circles = new List <ACircle>();
}
var options = CreateCircleOptions(circle);
var nativeCircle = map.AddCircle(options);
circle.MapElementId = nativeCircle.Id;
_circles.Add(nativeCircle);
}
void RemoveClicked(object sender, EventArgs e)
{
switch (_selectedType)
{
case SelectedElementType.Polyline:
Map.MapElements.Remove(_polyline);
_polyline = Map.MapElements.OfType <Maps.Polyline>().LastOrDefault();
if (_polyline == null)
{
Map.MapElements.Add(_polyline = new Maps.Polyline());
}
break;
case SelectedElementType.Polygon:
Map.MapElements.Remove(_polygon);
_polygon = Map.MapElements.OfType <Maps.Polygon>().LastOrDefault();
if (_polygon == null)
{
Map.MapElements.Add(_polygon = new Maps.Polygon());
}
break;
case SelectedElementType.Circle:
Map.MapElements.Remove(_circle);
_circle = Map.MapElements.OfType <Circle>().LastOrDefault();
if (_circle == null)
{
Map.MapElements.Add(_circle = new Circle());
}
break;
}
}
