public XGraphicsPath TransformGeom(double sf, LineString geom, BoundingBox geomBox) { double xmin = geomBox.Left; double ymin = geomBox.Bottom; XGraphicsPath xgp = new XGraphicsPath(); int i = 0; XPoint[] listXPoints = new XPoint[geom.Vertices.Count]; foreach (Point p in geom.Vertices) { //XPoint pCopy = new XPoint((p.X - xmin) * sf, -(p.Y - ymin) * sf); XPoint pCopy = TransformGeom(sf, p, geomBox); listXPoints[i++] = pCopy; } xgp.AddLines(listXPoints); return(xgp); }
/// <summary> /// Draws the marker given through rendererInfo at the specified position. Position specifies /// the center of the marker. /// </summary> internal static void Draw(XGraphics graphics, XPoint pos, MarkerRendererInfo rendererInfo) { #if SILVERLIGHT return; // BUG: Code crashs Silverlight Path class. #pragma warning disable 0162 #endif if (rendererInfo.MarkerStyle == MarkerStyle.None) { return; } double size = rendererInfo.MarkerSize; double size2 = size / 2; double x0, y0, x1, y1; double g; XPen foreground = new XPen(rendererInfo.MarkerForegroundColor, 0.5); XBrush background = new XSolidBrush(rendererInfo.MarkerBackgroundColor); XGraphicsPath gp = new XGraphicsPath(); switch (rendererInfo.MarkerStyle) { case MarkerStyle.Square: x0 = pos.X - size2; y0 = pos.Y - size2; x1 = pos.X + size2; y1 = pos.Y + size2; gp.AddLine(x0, y0, x1, y0); gp.AddLine(x1, y0, x1, y1); gp.AddLine(x1, y1, x0, y1); gp.AddLine(x0, y1, x0, y0); break; case MarkerStyle.Diamond: gp.AddLine(x1 = pos.X + size2, pos.Y, pos.X, y0 = pos.Y - size2); gp.AddLine(pos.X, y0, x0 = pos.X - size2, pos.Y); gp.AddLine(x0, pos.Y, pos.X, y1 = pos.Y + size2); gp.AddLine(pos.X, y1, x1, pos.Y); break; case MarkerStyle.Triangle: y0 = pos.Y + size / 2; y1 = pos.Y - size / 2; g = Math.Sqrt(size * size * 4 / 3) / 2; gp.AddLine(pos.X, y1, pos.X + g, y0); gp.AddLine(pos.X + g, y0, pos.X - g, y0); gp.AddLine(pos.X - g, y0, pos.X, y1); break; case MarkerStyle.Plus: g = size2 / 4; gp.AddLine(pos.X - size2, pos.Y + g, pos.X - g, pos.Y + g); gp.AddLine(pos.X - g, pos.Y + g, pos.X - g, pos.Y + size2); gp.AddLine(pos.X - g, pos.Y + size2, pos.X + g, pos.Y + size2); gp.AddLine(pos.X + g, pos.Y + size2, pos.X + g, pos.Y + g); gp.AddLine(pos.X + g, pos.Y + g, pos.X + size2, pos.Y + g); gp.AddLine(pos.X + size2, pos.Y + g, pos.X + size2, pos.Y - g); gp.AddLine(pos.X + size2, pos.Y - g, pos.X + g, pos.Y - g); gp.AddLine(pos.X + g, pos.Y - g, pos.X + g, pos.Y - size2); gp.AddLine(pos.X + g, pos.Y - size2, pos.X - g, pos.Y - size2); gp.AddLine(pos.X - g, pos.Y - size2, pos.X - g, pos.Y - g); gp.AddLine(pos.X - g, pos.Y - g, pos.X - size2, pos.Y - g); gp.AddLine(pos.X - size2, pos.Y - g, pos.X - size2, pos.Y + g); break; case MarkerStyle.Circle: case MarkerStyle.Dot: x0 = pos.X - size2; y0 = pos.Y - size2; gp.AddEllipse(x0, y0, size, size); break; case MarkerStyle.Dash: x0 = pos.X - size2; y0 = pos.Y - size2 / 3; x1 = pos.X + size2; y1 = pos.Y + size2 / 3; gp.AddLine(x0, y0, x1, y0); gp.AddLine(x1, y0, x1, y1); gp.AddLine(x1, y1, x0, y1); gp.AddLine(x0, y1, x0, y0); break; case MarkerStyle.X: g = size / 4; gp.AddLine(pos.X - size2 + g, pos.Y - size2, pos.X, pos.Y - g); gp.AddLine(pos.X, pos.Y - g, pos.X + size2 - g, pos.Y - size2); gp.AddLine(pos.X + size2 - g, pos.Y - size2, pos.X + size2, pos.Y - size2 + g); gp.AddLine(pos.X + size2, pos.Y - size2 + g, pos.X + g, pos.Y); gp.AddLine(pos.X + g, pos.Y, pos.X + size2, pos.Y + size2 - g); gp.AddLine(pos.X + size2, pos.Y + size2 - g, pos.X + size2 - g, pos.Y + size2); gp.AddLine(pos.X + size2 - g, pos.Y + size2, pos.X, pos.Y + g); gp.AddLine(pos.X, pos.Y + g, pos.X - size2 + g, pos.Y + size2); gp.AddLine(pos.X - size2 + g, pos.Y + size2, pos.X - size2, pos.Y + size2 - g); gp.AddLine(pos.X - size2, pos.Y + size2 - g, pos.X - g, pos.Y); gp.AddLine(pos.X - g, pos.Y, pos.X - size2, pos.Y - size2 + g); break; case MarkerStyle.Star: { XPoint[] points = new XPoint[10]; double radStep = 2 * Math.PI / 5; double outerCircle = size / 2; double innerCircle = size / 5; // outer circle double rad = -(Math.PI / 2); // 90� for (int idx = 0; idx < 10; idx += 2) { points[idx].X = pos.X + outerCircle * Math.Cos(rad); points[idx].Y = pos.Y + outerCircle * Math.Sin(rad); rad += radStep; } // inner circle rad = -(Math.PI / 4); // 45� double x = innerCircle * Math.Cos(rad); double y = innerCircle * Math.Sin(rad); points[1].X = pos.X + x; points[1].Y = pos.Y + y; points[9].X = pos.X - x; points[9].Y = pos.Y + y; rad += radStep; x = innerCircle * Math.Cos(rad); y = innerCircle * Math.Sin(rad); points[3].X = pos.X + x; points[3].Y = pos.Y + y; points[7].X = pos.X - x; points[7].Y = pos.Y + y; rad += radStep; y = innerCircle * Math.Sin(rad); points[5].X = pos.X; points[5].Y = pos.Y + y; gp.AddLines(points); } break; } gp.CloseFigure(); if (rendererInfo.MarkerStyle != MarkerStyle.Dot) { graphics.DrawPath(background, gp); graphics.DrawPath(foreground, gp); } }