public override MKAnnotationView GetViewForAnnotation(MKMapView mapView, NSObject annotation)
{
MKAnnotationView annotationView = null;
if (annotation is PointAnnotation)
{
Debug.WriteLine("it's a pin class");
}
else if (annotation is GeometryAnnotation)
{
Debug.WriteLine("it's a line class");
GeometryAnnotation geometryAnnotation = annotation as GeometryAnnotation;
LinePolygonAnnotationView _annotationView = new LinePolygonAnnotationView(
new RectangleF(0, 0, mapView.Frame.Size.Width, mapView.Frame.Size.Height));
_annotationView.Annotation = geometryAnnotation;
_annotationView.MapView = mapView;
_viewController.currentAnnotationView = _annotationView;
annotationView = _annotationView;
}
return(annotationView);
}
public override void TouchesBegan(NSSet touches, UIEvent evt)
{
UITouch aTouch = (UITouch)touches.AnyObject;
PointF location = aTouch.LocationInView(this);
Debug.WriteLine("TouchesBegan {0},{1}", location.X, location.Y);
var coordinate = MapView.ConvertPoint (location, this);
switch (geometry.Type)
{
case GeometryType.Point:
if (geometry.Count == 1)
{
var point = geometry[0];
MapView.RemoveAnnotation(point);
geometry.Remove(geometry[0]);
var newPoint = new PointAnnotation(coordinate);
geometry.Add(newPoint);
MapView.AddAnnotation(newPoint);
}
else
{
var point = new PointAnnotation(coordinate);
geometry.Add(point);
MapView.AddAnnotation(point);
}
break;
case GeometryType.Line:
var _point = new PointAnnotation (coordinate);
geometry.Add(_point);
foreach (var a in annotationViewsArray)
MapView.RemoveAnnotation(a as MKAnnotation);
annotationViewsArray.Clear();
if (geometry.Count >= 2)
{
var _lineAnnotation = new GeometryAnnotation(geometry.Points, geometry.Type);
MapView.AddAnnotation(_lineAnnotation);
annotationViewsArray.Add(_lineAnnotation);
}
MapView.AddAnnotation(_point);
break;
case GeometryType.Polygon:
var __point = new PointAnnotation (coordinate);
geometry.Add(__point);
foreach (var a in annotationViewsArray)
MapView.RemoveAnnotation(a as MKAnnotation);
annotationViewsArray.Clear();
if (geometry.Count == 2)
{
var _lineAnnotation = new GeometryAnnotation(geometry.Points, geometry.Type);
MapView.AddAnnotation(_lineAnnotation);
annotationViewsArray.Add(_lineAnnotation);
}
else
{
var _polygonAnnotation = new GeometryAnnotation(geometry.Points, geometry.Type);
MapView.AddAnnotation(_polygonAnnotation);
annotationViewsArray.Add(_polygonAnnotation);
}
MapView.AddAnnotation(__point);
break;
default:
break;
}
}
public override void TouchesBegan(NSSet touches, UIEvent evt)
{
UITouch aTouch = (UITouch)touches.AnyObject;
PointF location = aTouch.LocationInView(this);
Debug.WriteLine("TouchesBegan {0},{1}", location.X, location.Y);
var coordinate = MapView.ConvertPoint(location, this);
switch (geometry.Type)
{
case GeometryType.Point:
if (geometry.Count == 1)
{
var point = geometry[0];
MapView.RemoveAnnotation(point);
geometry.Remove(geometry[0]);
var newPoint = new PointAnnotation(coordinate);
geometry.Add(newPoint);
MapView.AddAnnotation(newPoint);
}
else
{
var point = new PointAnnotation(coordinate);
geometry.Add(point);
MapView.AddAnnotation(point);
}
break;
case GeometryType.Line:
var _point = new PointAnnotation(coordinate);
geometry.Add(_point);
foreach (var a in annotationViewsArray)
{
MapView.RemoveAnnotation(a as MKAnnotation);
}
annotationViewsArray.Clear();
if (geometry.Count >= 2)
{
var _lineAnnotation = new GeometryAnnotation(geometry.Points, geometry.Type);
MapView.AddAnnotation(_lineAnnotation);
annotationViewsArray.Add(_lineAnnotation);
}
MapView.AddAnnotation(_point);
break;
case GeometryType.Polygon:
var __point = new PointAnnotation(coordinate);
geometry.Add(__point);
foreach (var a in annotationViewsArray)
{
MapView.RemoveAnnotation(a as MKAnnotation);
}
annotationViewsArray.Clear();
if (geometry.Count == 2)
{
var _lineAnnotation = new GeometryAnnotation(geometry.Points, geometry.Type);
MapView.AddAnnotation(_lineAnnotation);
annotationViewsArray.Add(_lineAnnotation);
}
else
{
var _polygonAnnotation = new GeometryAnnotation(geometry.Points, geometry.Type);
MapView.AddAnnotation(_polygonAnnotation);
annotationViewsArray.Add(_polygonAnnotation);
}
MapView.AddAnnotation(__point);
break;
default:
break;
}
}
public override void Draw(RectangleF rect)
{
GeometryAnnotation myAnnotation = MainView.Annotation as GeometryAnnotation;
// only draw our lines if we're not in the middle of a transition and we
// acutally have some points to draw.
if (!this.Hidden && myAnnotation.Points != null && myAnnotation.Points.Count > 0)
{
CGContext context = UIGraphics.GetCurrentContext();
if (myAnnotation.LineColor != null)
{
myAnnotation.LineColor = UIColor.White;
}
context.SetStrokeColorWithColor(myAnnotation.LineColor.CGColor);
if (myAnnotation.Type == GeometryType.Polygon)
{
context.SetRGBFillColor(0.0f, 0.0f, 1.0f, 1.0f);
}
// Draw them with a 2.0 stroke width so they are a bit more visible
context.SetLineWidth(2.0f);
for (int idx = 0; idx < myAnnotation.Points.Count; idx++)
{
CLLocation location = myAnnotation.Points[idx];
PointF point = MainView.MapView.ConvertCoordinate(location.Coordinate, this);
//Debug.WriteLine("Point: {0}, {1}", point.X, point.Y);
if (idx == 0)
{
context.MoveTo(point.X, point.Y);
}
else
{
context.AddLineToPoint(point.X, point.Y);
}
}
if (myAnnotation.Type == GeometryType.Line)
{
context.StrokePath();
}
else if (myAnnotation.Type == GeometryType.Polygon)
{
context.ClosePath();
context.DrawPath(CGPathDrawingMode.FillStroke);
}
// debug. Draw the line around our view.
/*
* CGContextMoveToPoint(context, 0, 0);
* CGContextAddLineToPoint(context, 0, self.frame.size.height);
* CGContextAddLineToPoint(context, self.frame.size.width, self.frame.size.height);
* CGContextAddLineToPoint(context, self.frame.size.width, 0);
* CGContextAddLineToPoint(context, 0, 0);
* CGContextStrokePath(context);
*/
}
}
