Ejemplo n.º 1
0
        /// <summary>
        /// Draw the 2-point stencil drag points
        /// </summary>
        /// <param name="e">the canvas</param>
        /// <param name="zoomFactor">the zoom factor</param>
        public void Draw(SKCanvas e, float zoomFactor)
        {
            if (e == null)
            {
                throw new ArgumentNullException(nameof(e));
            }

            if (zoomFactor <= 0)
            {
                throw new ArgumentOutOfRangeException(nameof(zoomFactor), $"zoomFactor cannot be less than or equal to 0: {zoomFactor}.");
            }

            using var paint2 = new SKPaint
                  {
                      Color    = Color.Red.ToSKColor().WithAlpha(128),
                      IsStroke = false,
                  };

            e.DrawCircle(Point1.ToSKPoint(), Radius / zoomFactor, paint2);

            e.DrawCircle(Point2.ToSKPoint(), Radius / zoomFactor, paint2);
        }