294 строки
7.5 KiB
C#
294 строки
7.5 KiB
C#
/*
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NPlot - A charting library for .NET
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VerticalLine.cs
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Copyright (C) 2003
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Matt Howlett
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Redistribution and use of NPlot or parts there-of in source and
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binary forms, with or without modification, are permitted provided
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that the following conditions are met:
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1. Re-distributions in source form must retain at the head of each
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source file the above copyright notice, this list of conditions
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and the following disclaimer.
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2. Any product ("the product") that makes use NPlot or parts
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there-of must either:
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(a) allow any user of the product to obtain a complete machine-
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readable copy of the corresponding source code for the
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product and the version of NPlot used for a charge no more
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than your cost of physically performing source distribution,
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on a medium customarily used for software interchange, or:
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(b) reproduce the following text in the documentation, about
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box or other materials intended to be read by human users
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of the product that is provided to every human user of the
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product:
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"This product includes software developed as
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part of the NPlot library project available
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from: http://www.nplot.com/"
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The words "This product" may optionally be replace with
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the actual name of the product.
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------------------------------------------------------------------------
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Drawing;
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namespace NPlot
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{
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/// <summary>
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/// Encapsulates functionality for drawing a vertical line on a plot surface.
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/// </summary>
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public class VerticalLine : IPlot
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{
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="abscissaValue">abscissa (X) value of line.</param>
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public VerticalLine( double abscissaValue )
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{
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this.value_ = abscissaValue;
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}
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="abscissaValue">abscissa (X) value of line.</param>
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/// <param name="color">draw the line using this color.</param>
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public VerticalLine( double abscissaValue, Color color )
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{
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this.value_ = abscissaValue;
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this.pen_ = new Pen( color );
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}
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="abscissaValue">abscissa (X) value of line.</param>
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/// <param name="pen">Pen to use to draw the line.</param>
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public VerticalLine( double abscissaValue, Pen pen )
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{
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this.value_ = abscissaValue;
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this.pen_ = pen;
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}
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/// <summary>
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/// Draws a representation of the line in the legend
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/// </summary>
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/// <param name="g">The graphics surface on which to draw.</param>
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/// <param name="startEnd">A rectangle specifying the bounds of the area in the legend set aside for drawing.</param>
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public void DrawInLegend(System.Drawing.Graphics g, System.Drawing.Rectangle startEnd)
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{
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g.DrawLine( pen_, startEnd.Left, (startEnd.Top + startEnd.Bottom)/2,
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startEnd.Right, (startEnd.Top + startEnd.Bottom)/2 );
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}
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/// <summary>
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/// A label to associate with the plot - used in the legend.
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/// </summary>
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public string Label
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{
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get
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{
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return label_;
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}
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set
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{
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this.label_ = value;
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}
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}
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private string label_ = "";
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/// <summary>
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/// Whether or not to include an entry for this plot in the legend if it exists.
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/// </summary>
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public bool ShowInLegend
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{
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get
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{
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return showInLegend_;
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}
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set
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{
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this.showInLegend_ = value;
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}
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}
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private bool showInLegend_ = false;
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/// <summary>
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/// Returns an x-axis that is suitable for drawing this plot.
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/// </summary>
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/// <returns>A suitable x-axis.</returns>
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public Axis SuggestXAxis()
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{
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return new LinearAxis( value_, value_ );
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}
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/// <summary>
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/// Returns null indicating that y extremities of the line are variable.
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/// </summary>
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/// <returns>null</returns>
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public Axis SuggestYAxis()
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{
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return null;
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}
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/// <summary>
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/// Writes text data describing the vertical line object to the supplied string builder. It is
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/// possible to specify that the data will be written only if the line is in the specified
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/// region.
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/// </summary>
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/// <param name="sb">the StringBuilder object to write to.</param>
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/// <param name="region">a region used if onlyInRegion is true.</param>
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/// <param name="onlyInRegion">If true, data will be written only if the line is in the specified region.</param>
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public void WriteData(System.Text.StringBuilder sb, RectangleD region, bool onlyInRegion)
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{
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// return if line is not in plot region and
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if (value_ > region.X+region.Width || value_ < region.X)
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{
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if (onlyInRegion)
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{
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return;
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}
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}
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sb.Append( "Label: " );
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sb.Append( this.Label );
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sb.Append( "\r\n" );
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sb.Append( value_.ToString() );
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sb.Append( "\r\n" );
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}
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/// <summary>
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/// Draws the vertical line plot on a GDI+ surface against the provided x and y axes.
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/// </summary>
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/// <param name="g">The GDI+ surface on which to draw.</param>
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/// <param name="xAxis">The X-Axis to draw against.</param>
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/// <param name="yAxis">The Y-Axis to draw against.</param>
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public void Draw(System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
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{
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int yMin = yAxis.PhysicalMin.Y;
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int yMax = yAxis.PhysicalMax.Y;
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yMin -= pixelIndent_;
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yMax += pixelIndent_;
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float length = Math.Abs(yMax - yMin);
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float lengthDiff = length - length*scale_;
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float indentAmount = lengthDiff/2;
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yMin -= (int)indentAmount;
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yMax += (int)indentAmount;
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int xPos = (int)xAxis.WorldToPhysical( value_, false ).X;
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g.DrawLine( pen_, new System.Drawing.Point( xPos, yMin ), new System.Drawing.Point( xPos, yMax ) );
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// todo: clip and proper logic for flipped axis min max.
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}
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/// <summary>
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/// abscissa (X) value to draw horizontal line at.
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/// </summary>
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public double AbscissaValue
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{
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get
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{
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return value_;
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}
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set
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{
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value_ = value;
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}
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}
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/// <summary>
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/// Pen to use to draw the horizontal line.
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/// </summary>
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public Pen Pen
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{
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get
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{
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return pen_;
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}
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set
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{
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pen_ = value;
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}
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}
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private double value_;
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private Pen pen_ = new Pen( Color.Black );
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/// <summary>
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/// Each end of the line is indented by this many pixels.
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/// </summary>
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public int PixelIndent
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{
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get
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{
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return pixelIndent_;
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}
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set
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{
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pixelIndent_ = value;
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}
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}
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private int pixelIndent_ = 0;
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/// <summary>
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/// The line length is multiplied by this amount. Default
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/// corresponds to a value of 1.0.
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/// </summary>
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public float LengthScale
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{
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get
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{
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return scale_;
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}
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set
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{
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scale_ = value;
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}
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}
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private float scale_ = 1.0f;
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}
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}
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