123 lines
4.8 KiB
C#
123 lines
4.8 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 exploded pie plot area renderer.
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/// </summary>
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internal class PieExplodedPlotAreaRenderer : PiePlotAreaRenderer
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{
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/// <summary>
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/// Initializes a new instance of the PieExplodedPlotAreaRenderer class
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/// with the specified renderer parameters.
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/// </summary>
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internal PieExplodedPlotAreaRenderer(RendererParameters parms)
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: base(parms)
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{ }
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/// <summary>
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/// Calculate angles for each sector.
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/// </summary>
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protected override void CalcSectors()
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{
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ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
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if (cri.seriesRendererInfos.Length == 0)
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return;
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SeriesRendererInfo sri = cri.seriesRendererInfos[0];
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double sumValues = sri.SumOfPoints;
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if (sumValues == 0)
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return;
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double textMeasure = 0;
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if (sri._dataLabelRendererInfo != null && sri._dataLabelRendererInfo.Position == DataLabelPosition.OutsideEnd)
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{
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foreach (DataLabelEntryRendererInfo dleri in sri._dataLabelRendererInfo.Entries)
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{
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textMeasure = Math.Max(textMeasure, dleri.Width);
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textMeasure = Math.Max(textMeasure, dleri.Height);
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}
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}
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XRect pieRect = cri.plotAreaRendererInfo.Rect;
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if (textMeasure != 0)
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{
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pieRect.X += textMeasure;
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pieRect.Y += textMeasure;
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pieRect.Width -= 2 * textMeasure;
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pieRect.Height -= 2 * textMeasure;
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}
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XPoint origin = new XPoint(pieRect.X + pieRect.Width / 2, pieRect.Y + pieRect.Height / 2);
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XRect innerRect = new XRect();
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XPoint p1 = new XPoint();
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double midAngle = 0, sectorStartAngle = 0, sectorSweepAngle = 0,
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deltaAngle = 2, startAngle = 270, sweepAngle = 0,
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rInnerCircle = pieRect.Width / 15,
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rOuterCircle = pieRect.Width / 2;
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foreach (SectorRendererInfo sector in sri._pointRendererInfos)
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{
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if (!double.IsNaN(sector.Point._value) && sector.Point._value != 0)
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{
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sweepAngle = 360 / (sumValues / Math.Abs(sector.Point._value));
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midAngle = startAngle + sweepAngle / 2;
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sectorStartAngle = Math.Max(0, startAngle + deltaAngle);
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sectorSweepAngle = Math.Max(sweepAngle, sweepAngle - deltaAngle);
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p1.X = origin.X + rInnerCircle * Math.Cos(midAngle / 180 * Math.PI);
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p1.Y = origin.Y + rInnerCircle * Math.Sin(midAngle / 180 * Math.PI);
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innerRect.X = p1.X - rOuterCircle + rInnerCircle;
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innerRect.Y = p1.Y - rOuterCircle + rInnerCircle;
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innerRect.Width = (rOuterCircle - rInnerCircle) * 2;
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innerRect.Height = innerRect.Width;
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sector.Rect = innerRect;
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sector.StartAngle = sectorStartAngle;
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sector.SweepAngle = sectorSweepAngle;
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startAngle += sweepAngle;
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}
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else
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{
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sector.StartAngle = double.NaN;
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sector.SweepAngle = double.NaN;
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}
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}
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}
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}
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}
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