332 lines
14 KiB
C#
332 lines
14 KiB
C#
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#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 Y axis renderer used for charts of type Column2D or Line.
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/// </summary>
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internal class VerticalYAxisRenderer : YAxisRenderer
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{
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/// <summary>
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/// Initializes a new instance of the VerticalYAxisRenderer class with the
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/// specified renderer parameters.
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/// </summary>
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internal VerticalYAxisRenderer(RendererParameters parms)
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: base(parms)
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{ }
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/// <summary>
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/// Returns a initialized rendererInfo based on the Y axis.
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/// </summary>
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internal override RendererInfo Init()
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{
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Chart chart = (Chart)_rendererParms.DrawingItem;
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XGraphics gfx = _rendererParms.Graphics;
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AxisRendererInfo yari = new AxisRendererInfo();
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yari._axis = chart._yAxis;
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InitScale(yari);
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if (yari._axis != null)
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{
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ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
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InitTickLabels(yari, cri.DefaultFont);
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InitAxisTitle(yari, cri.DefaultFont);
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InitAxisLineFormat(yari);
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InitGridlines(yari);
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}
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return yari;
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}
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/// <summary>
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/// Calculates the space used for the Y axis.
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/// </summary>
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internal override void Format()
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{
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AxisRendererInfo yari = ((ChartRendererInfo)_rendererParms.RendererInfo).yAxisRendererInfo;
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if (yari._axis != null)
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{
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XGraphics gfx = _rendererParms.Graphics;
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XSize size = new XSize(0, 0);
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// height of all ticklabels
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double yMin = yari.MinimumScale;
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double yMax = yari.MaximumScale;
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double yMajorTick = yari.MajorTick;
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double lineHeight = Double.MinValue;
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XSize labelSize = new XSize(0, 0);
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for (double y = yMin; y <= yMax; y += yMajorTick)
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{
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string str = y.ToString(yari.TickLabelsFormat);
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labelSize = gfx.MeasureString(str, yari.TickLabelsFont);
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size.Height += labelSize.Height;
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size.Width = Math.Max(size.Width, labelSize.Width);
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lineHeight = Math.Max(lineHeight, labelSize.Height);
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}
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// add space for tickmarks
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size.Width += yari.MajorTickMarkWidth * 1.5;
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// Measure axis title
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XSize titleSize = new XSize(0, 0);
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if (yari._axisTitleRendererInfo != null)
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{
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RendererParameters parms = new RendererParameters();
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parms.Graphics = gfx;
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parms.RendererInfo = yari;
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AxisTitleRenderer atr = new AxisTitleRenderer(parms);
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atr.Format();
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titleSize.Height = yari._axisTitleRendererInfo.Height;
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titleSize.Width = yari._axisTitleRendererInfo.Width;
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}
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yari.Height = Math.Max(size.Height, titleSize.Height);
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yari.Width = size.Width + titleSize.Width;
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yari.InnerRect = yari.Rect;
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yari.InnerRect.Y += yari.TickLabelsFont.Height / 2;
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yari.LabelSize = labelSize;
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}
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}
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/// <summary>
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/// Draws the vertical Y axis.
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/// </summary>
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internal override void Draw()
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{
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AxisRendererInfo yari = ((ChartRendererInfo)_rendererParms.RendererInfo).yAxisRendererInfo;
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double yMin = yari.MinimumScale;
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double yMax = yari.MaximumScale;
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double yMajorTick = yari.MajorTick;
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double yMinorTick = yari.MinorTick;
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XMatrix matrix = new XMatrix();
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matrix.TranslatePrepend(-yari.InnerRect.X, yMax);
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matrix.Scale(1, yari.InnerRect.Height / (yMax - yMin), XMatrixOrder.Append);
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matrix.ScalePrepend(1, -1); // mirror horizontal
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matrix.Translate(yari.InnerRect.X, yari.InnerRect.Y, XMatrixOrder.Append);
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// Draw axis.
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// First draw tick marks, second draw axis.
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double majorTickMarkStart = 0, majorTickMarkEnd = 0,
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minorTickMarkStart = 0, minorTickMarkEnd = 0;
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GetTickMarkPos(yari, ref majorTickMarkStart, ref majorTickMarkEnd, ref minorTickMarkStart, ref minorTickMarkEnd);
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XGraphics gfx = _rendererParms.Graphics;
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LineFormatRenderer lineFormatRenderer = new LineFormatRenderer(gfx, yari.LineFormat);
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LineFormatRenderer minorTickMarkLineFormat = new LineFormatRenderer(gfx, yari.MinorTickMarkLineFormat);
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LineFormatRenderer majorTickMarkLineFormat = new LineFormatRenderer(gfx, yari.MajorTickMarkLineFormat);
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XPoint[] points = new XPoint[2];
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// Draw minor tick marks.
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if (yari.MinorTickMark != TickMarkType.None)
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{
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for (double y = yMin + yMinorTick; y < yMax; y += yMinorTick)
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{
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points[0].X = minorTickMarkStart;
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points[0].Y = y;
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points[1].X = minorTickMarkEnd;
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points[1].Y = y;
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matrix.TransformPoints(points);
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minorTickMarkLineFormat.DrawLine(points[0], points[1]);
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}
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}
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double lineSpace = yari.TickLabelsFont.GetHeight(); // old: yari.TickLabelsFont.GetHeight(gfx);
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int cellSpace = yari.TickLabelsFont.FontFamily.GetLineSpacing(yari.TickLabelsFont.Style);
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double xHeight = yari.TickLabelsFont.Metrics.XHeight;
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XSize labelSize = new XSize(0, 0);
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labelSize.Height = lineSpace * xHeight / cellSpace;
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int countTickLabels = (int)((yMax - yMin) / yMajorTick) + 1;
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for (int i = 0; i < countTickLabels; ++i)
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{
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double y = yMin + yMajorTick * i;
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string str = y.ToString(yari.TickLabelsFormat);
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labelSize.Width = gfx.MeasureString(str, yari.TickLabelsFont).Width;
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// Draw major tick marks.
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if (yari.MajorTickMark != TickMarkType.None)
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{
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labelSize.Width += yari.MajorTickMarkWidth * 1.5;
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points[0].X = majorTickMarkStart;
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points[0].Y = y;
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points[1].X = majorTickMarkEnd;
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points[1].Y = y;
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matrix.TransformPoints(points);
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majorTickMarkLineFormat.DrawLine(points[0], points[1]);
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}
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else
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labelSize.Width += SpaceBetweenLabelAndTickmark;
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// Draw label text.
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XPoint[] layoutText = new XPoint[1];
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layoutText[0].X = yari.InnerRect.X + yari.InnerRect.Width - labelSize.Width;
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layoutText[0].Y = y;
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matrix.TransformPoints(layoutText);
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layoutText[0].Y += labelSize.Height / 2; // Center text vertically.
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gfx.DrawString(str, yari.TickLabelsFont, yari.TickLabelsBrush, layoutText[0]);
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}
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// Draw axis.
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if (yari.LineFormat != null && yari.LineFormat.Width > 0)
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{
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points[0].X = yari.InnerRect.X + yari.InnerRect.Width;
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points[0].Y = yMin;
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points[1].X = yari.InnerRect.X + yari.InnerRect.Width;
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points[1].Y = yMax;
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matrix.TransformPoints(points);
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if (yari.MajorTickMark != TickMarkType.None)
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{
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// yMax is at the upper side of the axis
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points[1].Y -= yari.LineFormat.Width / 2;
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points[0].Y += yari.LineFormat.Width / 2;
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}
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lineFormatRenderer.DrawLine(points[0], points[1]);
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}
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// Draw axis title
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if (yari._axisTitleRendererInfo != null && yari._axisTitleRendererInfo.AxisTitleText != "")
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{
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RendererParameters parms = new RendererParameters();
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parms.Graphics = gfx;
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parms.RendererInfo = yari;
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double width = yari._axisTitleRendererInfo.Width;
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yari._axisTitleRendererInfo.Rect = yari.InnerRect;
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yari._axisTitleRendererInfo.Width = width;
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AxisTitleRenderer atr = new AxisTitleRenderer(parms);
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atr.Draw();
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}
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}
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/// <summary>
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/// Calculates all values necessary for scaling the axis like minimum/maximum scale or
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/// minor/major tick.
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/// </summary>
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private void InitScale(AxisRendererInfo rendererInfo)
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{
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double yMin, yMax;
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CalcYAxis(out yMin, out yMax);
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FineTuneYAxis(rendererInfo, yMin, yMax);
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rendererInfo.MajorTickMarkWidth = DefaultMajorTickMarkWidth;
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rendererInfo.MinorTickMarkWidth = DefaultMinorTickMarkWidth;
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}
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/// <summary>
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/// Gets the top and bottom position of the major and minor tick marks depending on the
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/// tick mark type.
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/// </summary>
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private void GetTickMarkPos(AxisRendererInfo rendererInfo,
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ref double majorTickMarkStart, ref double majorTickMarkEnd,
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ref double minorTickMarkStart, ref double minorTickMarkEnd)
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{
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double majorTickMarkWidth = rendererInfo.MajorTickMarkWidth;
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double minorTickMarkWidth = rendererInfo.MinorTickMarkWidth;
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XRect rect = rendererInfo.Rect;
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switch (rendererInfo.MajorTickMark)
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{
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case TickMarkType.Inside:
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majorTickMarkStart = rect.X + rect.Width;
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majorTickMarkEnd = rect.X + rect.Width + majorTickMarkWidth;
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break;
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case TickMarkType.Outside:
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majorTickMarkStart = rect.X + rect.Width;
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majorTickMarkEnd = rect.X + rect.Width - majorTickMarkWidth;
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break;
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case TickMarkType.Cross:
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majorTickMarkStart = rect.X + rect.Width - majorTickMarkWidth;
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majorTickMarkEnd = rect.X + rect.Width + majorTickMarkWidth;
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break;
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//TickMarkType.None:
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default:
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majorTickMarkStart = 0;
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majorTickMarkEnd = 0;
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break;
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}
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switch (rendererInfo.MinorTickMark)
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{
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case TickMarkType.Inside:
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minorTickMarkStart = rect.X + rect.Width;
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minorTickMarkEnd = rect.X + rect.Width + minorTickMarkWidth;
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break;
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case TickMarkType.Outside:
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minorTickMarkStart = rect.X + rect.Width;
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minorTickMarkEnd = rect.X + rect.Width - minorTickMarkWidth;
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break;
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case TickMarkType.Cross:
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minorTickMarkStart = rect.X + rect.Width - minorTickMarkWidth;
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minorTickMarkEnd = rect.X + rect.Width + minorTickMarkWidth;
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break;
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//TickMarkType.None:
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default:
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minorTickMarkStart = 0;
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minorTickMarkEnd = 0;
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break;
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}
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}
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/// <summary>
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/// Determines the smallest and the largest number from all series of the chart.
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/// </summary>
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protected virtual void CalcYAxis(out double yMin, out double yMax)
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{
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yMin = double.MaxValue;
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yMax = double.MinValue;
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foreach (Series series in ((Chart)_rendererParms.DrawingItem).SeriesCollection)
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{
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foreach (Point point in series.Elements)
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{
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if (!double.IsNaN(point._value))
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{
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yMin = Math.Min(yMin, point.Value);
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yMax = Math.Max(yMax, point.Value);
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}
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}
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}
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}
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}
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}
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