public static void PositionMultiPolygon(CALayer shape, MultiPolygon multiPolygon, IStyle style, IViewport viewport)
{
var shapeLayer = shape as CAShapeLayer;
var path = multiPolygon.ToUIKit(viewport);
//var frame = ConvertBoundingBox (multiPolygon.GetBoundingBox(), viewport);
shapeLayer.Path = path.CGPath;
//shape.Frame = frame;
/*
* if (viewport.Resolution > MinResolution || viewport.Resolution < MaxResolution) {
* //recalculate
* var newImage = RenderMultiPolygonOnLayer (multiPolygon, style, viewport);
*
* shape.Contents = newImage.Contents;
* shape.Frame = newImage.Frame;
*
* var resolution = ZoomHelper.ClipToExtremes (Resolutions, viewport.Resolution);
*
* MinResolution = ZoomHelper.ZoomOut (Resolutions, resolution);
* MaxResolution = ZoomHelper.ZoomIn (Resolutions, resolution);
*
* } else {
* //reposition Geometry
* var frame = ConvertBoundingBox (multiPolygon.GetBoundingBox(), viewport);
* var newFrame = new RectangleF (frame.X, (frame.Y), frame.Width, frame.Height);
*
* shape.Frame = newFrame;
* //shape.Frame = frame;
* }
*/
}
public static CALayer RenderMultiPolygonOnLayer(MultiPolygon multiPolygon, IStyle style, IViewport viewport)
{
var tile = new CAShapeLayer();
if (!(style is VectorStyle))
{
throw new ArgumentException("Style is not of type VectorStyle");
}
var vectorStyle = style as VectorStyle;
var strokeAlpha = (float)vectorStyle.Outline.Color.A / 255;
var fillAlpha = (float)vectorStyle.Fill.Color.A / 255;
var strokeColor = new CGColor(new CGColor(vectorStyle.Outline.Color.R, vectorStyle.Outline.Color.G,
vectorStyle.Outline.Color.B), strokeAlpha);
var fillColor = new CGColor(new CGColor(vectorStyle.Fill.Color.R, vectorStyle.Fill.Color.G,
vectorStyle.Fill.Color.B), fillAlpha);
var path = multiPolygon.ToUIKit(viewport);
tile.StrokeColor = strokeColor;
tile.FillColor = fillColor;
tile.LineWidth = (float)vectorStyle.Outline.Width;
tile.Path = path.CGPath;
return(tile);
}
private static CALayer RenderImage(MultiPolygon multiPolygon, IStyle style, IViewport viewport)
{
var geom = new CAShapeLayer();
if (!(style is VectorStyle))
{
throw new ArgumentException("Style is not of type VectorStyle");
}
var vectorStyle = style as VectorStyle;
float strokeAlpha = (float)vectorStyle.Outline.Color.A / 255;
float fillAlpha = (float)vectorStyle.Fill.Color.A / 255;
var strokeColor = new CGColor(new CGColor(vectorStyle.Outline.Color.R, vectorStyle.Outline.Color.G,
vectorStyle.Outline.Color.B), strokeAlpha);
var fillColor = new CGColor(new CGColor(vectorStyle.Fill.Color.R, vectorStyle.Fill.Color.G,
vectorStyle.Fill.Color.B), fillAlpha);
geom.StrokeColor = strokeColor;
geom.FillColor = fillColor;
geom.LineWidth = (float)vectorStyle.Outline.Width;
var bbRect = GeometryRenderer.ConvertBoundingBox(multiPolygon.GetBoundingBox(), viewport);
var offset = new System.Drawing.Point((int)bbRect.GetMinX(), (int)bbRect.GetMinY());
GeometryExtension.OffSet = offset;
var path = multiPolygon.ToUIKit(viewport);
var frame = new RectangleF(0, 0, (int)(bbRect.GetMaxX() - bbRect.GetMinX()), (int)(bbRect.GetMaxY() - bbRect.GetMinY()));
var size = frame.Size;
geom.Path = path.CGPath;
UIGraphics.BeginImageContext(size);
var context = UIGraphics.GetCurrentContext();
context.SetBlendMode(CGBlendMode.Multiply);
geom.RenderInContext(context);
var image = UIGraphics.GetImageFromCurrentImageContext();
var imageTile = new CALayer {
Contents = image.CGImage, Frame = frame
};
return(imageTile);
}
