190 lines
8.3 KiB
C#
190 lines
8.3 KiB
C#
#region PDFsharp Charting - A .NET charting library based on PDFsharp
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//
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// Authors:
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// Niklas Schneider
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using PdfSharp.Drawing;
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namespace PdfSharp.Charting.Renderers
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{
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/// <summary>
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/// Represents a renderer for markers in line charts and legends.
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/// </summary>
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internal class MarkerRenderer
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{
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/// <summary>
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/// Draws the marker given through rendererInfo at the specified position. Position specifies
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/// the center of the marker.
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/// </summary>
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internal static void Draw(XGraphics graphics, XPoint pos, MarkerRendererInfo rendererInfo)
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{
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#if SILVERLIGHT
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return; // BUG: Code crashs Silverlight Path class.
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#pragma warning disable 0162
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#endif
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if (rendererInfo.MarkerStyle == MarkerStyle.None)
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return;
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double size = rendererInfo.MarkerSize;
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double size2 = size / 2;
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double x0, y0, x1, y1;
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double g;
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XPen foreground = new XPen(rendererInfo.MarkerForegroundColor, 0.5);
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XBrush background = new XSolidBrush(rendererInfo.MarkerBackgroundColor);
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XGraphicsPath gp = new XGraphicsPath();
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switch (rendererInfo.MarkerStyle)
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{
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case MarkerStyle.Square:
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x0 = pos.X - size2;
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y0 = pos.Y - size2;
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x1 = pos.X + size2;
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y1 = pos.Y + size2;
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gp.AddLine(x0, y0, x1, y0);
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gp.AddLine(x1, y0, x1, y1);
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gp.AddLine(x1, y1, x0, y1);
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gp.AddLine(x0, y1, x0, y0);
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break;
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case MarkerStyle.Diamond:
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gp.AddLine(x1 = pos.X + size2, pos.Y, pos.X, y0 = pos.Y - size2);
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gp.AddLine(pos.X, y0, x0 = pos.X - size2, pos.Y);
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gp.AddLine(x0, pos.Y, pos.X, y1 = pos.Y + size2);
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gp.AddLine(pos.X, y1, x1, pos.Y);
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break;
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case MarkerStyle.Triangle:
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y0 = pos.Y + size / 2;
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y1 = pos.Y - size / 2;
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g = Math.Sqrt(size * size * 4 / 3) / 2;
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gp.AddLine(pos.X, y1, pos.X + g, y0);
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gp.AddLine(pos.X + g, y0, pos.X - g, y0);
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gp.AddLine(pos.X - g, y0, pos.X, y1);
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break;
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case MarkerStyle.Plus:
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g = size2 / 4;
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gp.AddLine(pos.X - size2, pos.Y + g, pos.X - g, pos.Y + g);
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gp.AddLine(pos.X - g, pos.Y + g, pos.X - g, pos.Y + size2);
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gp.AddLine(pos.X - g, pos.Y + size2, pos.X + g, pos.Y + size2);
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gp.AddLine(pos.X + g, pos.Y + size2, pos.X + g, pos.Y + g);
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gp.AddLine(pos.X + g, pos.Y + g, pos.X + size2, pos.Y + g);
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gp.AddLine(pos.X + size2, pos.Y + g, pos.X + size2, pos.Y - g);
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gp.AddLine(pos.X + size2, pos.Y - g, pos.X + g, pos.Y - g);
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gp.AddLine(pos.X + g, pos.Y - g, pos.X + g, pos.Y - size2);
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gp.AddLine(pos.X + g, pos.Y - size2, pos.X - g, pos.Y - size2);
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gp.AddLine(pos.X - g, pos.Y - size2, pos.X - g, pos.Y - g);
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gp.AddLine(pos.X - g, pos.Y - g, pos.X - size2, pos.Y - g);
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gp.AddLine(pos.X - size2, pos.Y - g, pos.X - size2, pos.Y + g);
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break;
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case MarkerStyle.Circle:
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case MarkerStyle.Dot:
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x0 = pos.X - size2;
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y0 = pos.Y - size2;
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gp.AddEllipse(x0, y0, size, size);
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break;
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case MarkerStyle.Dash:
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x0 = pos.X - size2;
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y0 = pos.Y - size2 / 3;
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x1 = pos.X + size2;
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y1 = pos.Y + size2 / 3;
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gp.AddLine(x0, y0, x1, y0);
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gp.AddLine(x1, y0, x1, y1);
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gp.AddLine(x1, y1, x0, y1);
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gp.AddLine(x0, y1, x0, y0);
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break;
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case MarkerStyle.X:
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g = size / 4;
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gp.AddLine(pos.X - size2 + g, pos.Y - size2, pos.X, pos.Y - g);
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gp.AddLine(pos.X, pos.Y - g, pos.X + size2 - g, pos.Y - size2);
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gp.AddLine(pos.X + size2 - g, pos.Y - size2, pos.X + size2, pos.Y - size2 + g);
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gp.AddLine(pos.X + size2, pos.Y - size2 + g, pos.X + g, pos.Y);
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gp.AddLine(pos.X + g, pos.Y, pos.X + size2, pos.Y + size2 - g);
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gp.AddLine(pos.X + size2, pos.Y + size2 - g, pos.X + size2 - g, pos.Y + size2);
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gp.AddLine(pos.X + size2 - g, pos.Y + size2, pos.X, pos.Y + g);
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gp.AddLine(pos.X, pos.Y + g, pos.X - size2 + g, pos.Y + size2);
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gp.AddLine(pos.X - size2 + g, pos.Y + size2, pos.X - size2, pos.Y + size2 - g);
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gp.AddLine(pos.X - size2, pos.Y + size2 - g, pos.X - g, pos.Y);
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gp.AddLine(pos.X - g, pos.Y, pos.X - size2, pos.Y - size2 + g);
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break;
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case MarkerStyle.Star:
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{
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XPoint[] points = new XPoint[10];
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double radStep = 2 * Math.PI / 5;
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double outerCircle = size / 2;
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double innerCircle = size / 5;
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// outer circle
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double rad = -(Math.PI / 2); // 90<39>
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for (int idx = 0; idx < 10; idx += 2)
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{
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points[idx].X = pos.X + outerCircle * Math.Cos(rad);
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points[idx].Y = pos.Y + outerCircle * Math.Sin(rad);
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rad += radStep;
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}
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// inner circle
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rad = -(Math.PI / 4); // 45<34>
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double x = innerCircle * Math.Cos(rad);
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double y = innerCircle * Math.Sin(rad);
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points[1].X = pos.X + x;
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points[1].Y = pos.Y + y;
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points[9].X = pos.X - x;
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points[9].Y = pos.Y + y;
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rad += radStep;
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x = innerCircle * Math.Cos(rad);
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y = innerCircle * Math.Sin(rad);
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points[3].X = pos.X + x;
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points[3].Y = pos.Y + y;
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points[7].X = pos.X - x;
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points[7].Y = pos.Y + y;
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rad += radStep;
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y = innerCircle * Math.Sin(rad);
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points[5].X = pos.X;
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points[5].Y = pos.Y + y;
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gp.AddLines(points);
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}
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break;
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}
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gp.CloseFigure();
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if (rendererInfo.MarkerStyle != MarkerStyle.Dot)
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{
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graphics.DrawPath(background, gp);
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graphics.DrawPath(foreground, gp);
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}
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}
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}
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}
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