140 lines
5.7 KiB
C#
140 lines
5.7 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 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 plot area renderer of clustered columns, i. e. all columns are drawn side by side.
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/// </summary>
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internal abstract class ColumnPlotAreaRenderer : ColumnLikePlotAreaRenderer
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{
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/// <summary>
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/// Initializes a new instance of the ColumnPlotAreaRenderer class with the
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/// specified renderer parameters.
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/// </summary>
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internal ColumnPlotAreaRenderer(RendererParameters parms)
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: base(parms)
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{ }
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/// <summary>
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/// Layouts and calculates the space for each column.
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/// </summary>
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internal override void Format()
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{
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base.Format();
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CalcColumns();
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}
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/// <summary>
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/// Draws the content of the column plot area.
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/// </summary>
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internal override void Draw()
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{
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ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
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XRect plotAreaBox = cri.plotAreaRendererInfo.Rect;
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if (plotAreaBox.IsEmpty)
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return;
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XGraphics gfx = _rendererParms.Graphics;
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double xMin = cri.xAxisRendererInfo.MinimumScale;
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double xMax = cri.xAxisRendererInfo.MaximumScale;
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double yMin = cri.yAxisRendererInfo.MinimumScale;
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double yMax = cri.yAxisRendererInfo.MaximumScale;
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LineFormatRenderer lineFormatRenderer;
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// Under some circumstances it is possible that no zero base line will be drawn,
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// e. g. because of unfavourable minimum/maximum scale and/or major tick, so force to draw
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// a zero base line if necessary.
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if (cri.yAxisRendererInfo.MajorGridlinesLineFormat != null ||
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cri.yAxisRendererInfo.MinorGridlinesLineFormat != null)
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{
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if (yMin < 0 && yMax > 0)
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{
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XPoint[] points = new XPoint[2];
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points[0].X = xMin;
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points[0].Y = 0;
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points[1].X = xMax;
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points[1].Y = 0;
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cri.plotAreaRendererInfo._matrix.TransformPoints(points);
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if (cri.yAxisRendererInfo.MinorGridlinesLineFormat != null)
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lineFormatRenderer = new LineFormatRenderer(gfx, cri.yAxisRendererInfo.MinorGridlinesLineFormat);
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else
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lineFormatRenderer = new LineFormatRenderer(gfx, cri.yAxisRendererInfo.MajorGridlinesLineFormat);
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lineFormatRenderer.DrawLine(points[0], points[1]);
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}
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}
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// Draw columns
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XGraphicsState state = gfx.Save();
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foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
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{
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foreach (ColumnRendererInfo column in sri._pointRendererInfos)
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{
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// Do not draw column if value is outside yMin/yMax range. Clipping does not make sense.
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if (IsDataInside(yMin, yMax, column.Point._value))
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gfx.DrawRectangle(column.FillFormat, column.Rect);
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}
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}
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// Draw borders around column.
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// A border can overlap neighbor columns, so it is important to draw borders at the end.
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foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
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{
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foreach (ColumnRendererInfo column in sri._pointRendererInfos)
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{
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// Do not draw column if value is outside yMin/yMax range. Clipping does not make sense.
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if (IsDataInside(yMin, yMax, column.Point._value) && column.LineFormat.Width > 0)
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{
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lineFormatRenderer = new LineFormatRenderer(gfx, column.LineFormat);
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lineFormatRenderer.DrawRectangle(column.Rect);
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}
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}
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}
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gfx.Restore(state);
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}
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/// <summary>
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/// Calculates the position, width and height of each column of all series.
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/// </summary>
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protected abstract void CalcColumns();
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/// <summary>
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/// If yValue is within the range from yMin to yMax returns true, otherwise false.
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/// </summary>
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protected abstract bool IsDataInside(double yMin, double yMax, double yValue);
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}
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}
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