315 lines
13 KiB
C#
315 lines
13 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 an axis renderer used for charts of type Column2D or Line.
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/// </summary>
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internal class HorizontalXAxisRenderer : XAxisRenderer
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{
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/// <summary>
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/// Initializes a new instance of the HorizontalXAxisRenderer class with the specified renderer parameters.
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/// </summary>
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internal HorizontalXAxisRenderer(RendererParameters parms)
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: base(parms)
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{ }
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/// <summary>
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/// Returns an initialized rendererInfo based on the X 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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AxisRendererInfo xari = new AxisRendererInfo();
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xari._axis = chart._xAxis;
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if (xari._axis != null)
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{
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ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
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CalculateXAxisValues(xari);
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InitTickLabels(xari, cri.DefaultFont);
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InitXValues(xari);
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InitAxisTitle(xari, cri.DefaultFont);
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InitAxisLineFormat(xari);
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InitGridlines(xari);
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}
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return xari;
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}
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/// <summary>
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/// Calculates the space used for the X axis.
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/// </summary>
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internal override void Format()
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{
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AxisRendererInfo xari = ((ChartRendererInfo)_rendererParms.RendererInfo).xAxisRendererInfo;
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if (xari._axis != null)
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{
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AxisTitleRendererInfo atri = xari._axisTitleRendererInfo;
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// Calculate space used for axis title.
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XSize titleSize = new XSize(0, 0);
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if (atri != null && atri.AxisTitleText != null && atri.AxisTitleText.Length > 0)
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{
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titleSize = _rendererParms.Graphics.MeasureString(atri.AxisTitleText, atri.AxisTitleFont);
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atri.AxisTitleSize = titleSize;
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}
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// Calculate space used for tick labels.
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XSize size = new XSize(0, 0);
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if (xari.XValues.Count > 0)
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{
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XSeries xs = xari.XValues[0];
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foreach (XValue xv in xs)
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{
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if (xv != null)
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{
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string tickLabel = xv._value;
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XSize valueSize = _rendererParms.Graphics.MeasureString(tickLabel, xari.TickLabelsFont);
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size.Height = Math.Max(valueSize.Height, size.Height);
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size.Width += valueSize.Width;
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}
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}
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}
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// Remember space for later drawing.
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xari.TickLabelsHeight = size.Height;
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xari.Height = titleSize.Height + size.Height + xari.MajorTickMarkWidth;
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xari.Width = Math.Max(titleSize.Width, size.Width);
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}
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}
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/// <summary>
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/// Draws the horizontal X axis.
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/// </summary>
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internal override void Draw()
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{
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XGraphics gfx = _rendererParms.Graphics;
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ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
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AxisRendererInfo xari = cri.xAxisRendererInfo;
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double xMin = xari.MinimumScale;
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double xMax = xari.MaximumScale;
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double xMajorTick = xari.MajorTick;
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double xMinorTick = xari.MinorTick;
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double xMaxExtension = xari.MajorTick;
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// Draw tick labels. Each tick label will be aligned centered.
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int countTickLabels = (int)xMax;
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double tickLabelStep = xari.Width;
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if (countTickLabels != 0)
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tickLabelStep = xari.Width / countTickLabels;
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//XPoint startPos = new XPoint(xari.X + tickLabelStep / 2, xari.Y + /*xari.TickLabelsHeight +*/ xari.MajorTickMarkWidth);
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XPoint startPos = new XPoint(xari.X + tickLabelStep / 2, xari.Y + xari.TickLabelsHeight);
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if (xari.MajorTickMark != TickMarkType.None)
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startPos.Y += xari.MajorTickMarkWidth;
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foreach (XSeries xs in xari.XValues)
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{
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for (int idx = 0; idx < countTickLabels && idx < xs.Count; ++idx)
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{
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XValue xv = xs[idx];
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if (xv != null)
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{
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string tickLabel = xv._value;
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XSize size = gfx.MeasureString(tickLabel, xari.TickLabelsFont);
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gfx.DrawString(tickLabel, xari.TickLabelsFont, xari.TickLabelsBrush, startPos.X - size.Width / 2, startPos.Y);
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}
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startPos.X += tickLabelStep;
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}
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}
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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(xari, ref majorTickMarkStart, ref majorTickMarkEnd, ref minorTickMarkStart, ref minorTickMarkEnd);
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LineFormatRenderer lineFormatRenderer = new LineFormatRenderer(gfx, xari.LineFormat);
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XPoint[] points = new XPoint[2];
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// Minor ticks.
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if (xari.MinorTickMark != TickMarkType.None)
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{
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int countMinorTickMarks = (int)(xMax / xMinorTick);
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double minorTickMarkStep = xari.Width / countMinorTickMarks;
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startPos.X = xari.X;
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for (int x = 0; x <= countMinorTickMarks; x++)
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{
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points[0].X = startPos.X + minorTickMarkStep * x;
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points[0].Y = minorTickMarkStart;
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points[1].X = points[0].X;
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points[1].Y = minorTickMarkEnd;
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lineFormatRenderer.DrawLine(points[0], points[1]);
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}
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}
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// Major ticks.
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if (xari.MajorTickMark != TickMarkType.None)
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{
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int countMajorTickMarks = (int)(xMax / xMajorTick);
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double majorTickMarkStep = xari.Width;
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if (countMajorTickMarks != 0)
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majorTickMarkStep = xari.Width / countMajorTickMarks;
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startPos.X = xari.X;
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for (int x = 0; x <= countMajorTickMarks; x++)
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{
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points[0].X = startPos.X + majorTickMarkStep * x;
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points[0].Y = majorTickMarkStart;
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points[1].X = points[0].X;
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points[1].Y = majorTickMarkEnd;
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lineFormatRenderer.DrawLine(points[0], points[1]);
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}
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}
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// Axis.
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if (xari.LineFormat != null)
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{
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points[0].X = xari.X;
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points[0].Y = xari.Y;
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points[1].X = xari.X + xari.Width;
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points[1].Y = xari.Y;
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if (xari.MajorTickMark != TickMarkType.None)
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{
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points[0].X -= xari.LineFormat.Width / 2;
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points[1].X += xari.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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AxisTitleRendererInfo atri = xari._axisTitleRendererInfo;
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if (atri != null && atri.AxisTitleText != null && atri.AxisTitleText.Length > 0)
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{
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XRect rect = new XRect(xari.Rect.Right / 2 - atri.AxisTitleSize.Width / 2, xari.Rect.Bottom,
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atri.AxisTitleSize.Width, 0);
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gfx.DrawString(atri.AxisTitleText, atri.AxisTitleFont, atri.AxisTitleBrush, rect);
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}
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}
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/// <summary>
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/// Calculates the X axis describing values like minimum/maximum scale, major/minor tick and
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/// major/minor tick mark width.
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/// </summary>
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private void CalculateXAxisValues(AxisRendererInfo rendererInfo)
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{
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// Calculates the maximum number of data points over all series.
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SeriesCollection seriesCollection = ((Chart)rendererInfo._axis._parent)._seriesCollection;
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int count = 0;
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foreach (Series series in seriesCollection)
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count = Math.Max(count, series.Count);
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rendererInfo.MinimumScale = 0;
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rendererInfo.MaximumScale = count; // At least 0
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rendererInfo.MajorTick = 1;
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rendererInfo.MinorTick = 0.5;
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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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/// Initializes the rendererInfo's xvalues. If not set by the user xvalues will be simply numbers
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/// from minimum scale + 1 to maximum scale.
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/// </summary>
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private void InitXValues(AxisRendererInfo rendererInfo)
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{
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rendererInfo.XValues = ((Chart)rendererInfo._axis._parent)._xValues;
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if (rendererInfo.XValues == null)
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{
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rendererInfo.XValues = new XValues();
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XSeries xs = rendererInfo.XValues.AddXSeries();
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for (double i = rendererInfo.MinimumScale + 1; i <= rendererInfo.MaximumScale; ++i)
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xs.Add(i.ToString(rendererInfo.TickLabelsFormat));
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}
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}
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/// <summary>
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/// Calculates the starting and ending y position for the minor and major tick marks.
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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.Y;
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majorTickMarkEnd = rect.Y - majorTickMarkWidth;
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break;
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case TickMarkType.Outside:
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majorTickMarkStart = rect.Y;
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majorTickMarkEnd = rect.Y + majorTickMarkWidth;
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break;
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case TickMarkType.Cross:
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majorTickMarkStart = rect.Y + majorTickMarkWidth;
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majorTickMarkEnd = rect.Y - majorTickMarkWidth;
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break;
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case TickMarkType.None:
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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.Y;
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minorTickMarkEnd = rect.Y - minorTickMarkWidth;
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break;
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case TickMarkType.Outside:
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minorTickMarkStart = rect.Y;
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minorTickMarkEnd = rect.Y + minorTickMarkWidth;
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break;
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case TickMarkType.Cross:
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minorTickMarkStart = rect.Y + minorTickMarkWidth;
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minorTickMarkEnd = rect.Y - minorTickMarkWidth;
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break;
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case TickMarkType.None:
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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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}
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}
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