356 строки
10 KiB
C#
356 строки
10 KiB
C#
|
/*
|
||
|
|
NPlot - A charting library for .NET
|
||
|
|
|
||
|
|
LinePlot.cs
|
||
|
|
Copyright (C) 2003
|
||
|
|
Matt Howlett
|
||
|
|
|
||
|
|
Redistribution and use of NPlot or parts there-of in source and
|
||
|
|
binary forms, with or without modification, are permitted provided
|
||
|
|
that the following conditions are met:
|
||
|
|
|
||
|
|
1. Re-distributions in source form must retain at the head of each
|
||
|
|
source file the above copyright notice, this list of conditions
|
||
|
|
and the following disclaimer.
|
||
|
|
|
||
|
|
2. Any product ("the product") that makes use NPlot or parts
|
||
|
|
there-of must either:
|
||
|
|
|
||
|
|
(a) allow any user of the product to obtain a complete machine-
|
||
|
|
readable copy of the corresponding source code for the
|
||
|
|
product and the version of NPlot used for a charge no more
|
||
|
|
than your cost of physically performing source distribution,
|
||
|
|
on a medium customarily used for software interchange, or:
|
||
|
|
|
||
|
|
(b) reproduce the following text in the documentation, about
|
||
|
|
box or other materials intended to be read by human users
|
||
|
|
of the product that is provided to every human user of the
|
||
|
|
product:
|
||
|
|
|
||
|
|
"This product includes software developed as
|
||
|
|
part of the NPlot library project available
|
||
|
|
from: http://www.nplot.com/"
|
||
|
|
|
||
|
|
The words "This product" may optionally be replace with
|
||
|
|
the actual name of the product.
|
||
|
|
|
||
|
|
------------------------------------------------------------------------
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||
|
|
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||
|
|
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||
|
|
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||
|
|
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
using System;
|
||
|
|
using System.Drawing;
|
||
|
|
using System.Diagnostics;
|
||
|
|
|
||
|
|
namespace NPlot
|
||
|
|
{
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Encapsulates functionality for plotting data as a line chart.
|
||
|
|
/// </summary>
|
||
|
|
public class LinePlot : BaseSequencePlot, IPlot, ISequencePlot
|
||
|
|
{
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Default constructor
|
||
|
|
/// </summary>
|
||
|
|
public LinePlot()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Constructor
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="dataSource">The data source to associate with this plot</param>
|
||
|
|
public LinePlot( object dataSource )
|
||
|
|
{
|
||
|
|
this.DataSource = dataSource;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Constructor
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="ordinateData">the ordinate data to associate with this plot.</param>
|
||
|
|
/// <param name="abscissaData">the abscissa data to associate with this plot.</param>
|
||
|
|
public LinePlot( object ordinateData, object abscissaData )
|
||
|
|
{
|
||
|
|
this.OrdinateData = ordinateData;
|
||
|
|
this.AbscissaData = abscissaData;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Draws the line plot on a GDI+ surface against the provided x and y axes.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="g">The GDI+ surface on which to draw.</param>
|
||
|
|
/// <param name="xAxis">The X-Axis to draw against.</param>
|
||
|
|
/// <param name="yAxis">The Y-Axis to draw against.</param>
|
||
|
|
/// <param name="drawShadow">If true draw the shadow for the line. If false, draw line.</param>
|
||
|
|
public void DrawLineOrShadow( Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis, bool drawShadow )
|
||
|
|
{
|
||
|
|
Pen shadowPen = null;
|
||
|
|
if (drawShadow)
|
||
|
|
{
|
||
|
|
shadowPen = (Pen)this.Pen.Clone();
|
||
|
|
shadowPen.Color = this.ShadowColor;
|
||
|
|
}
|
||
|
|
|
||
|
|
SequenceAdapter data =
|
||
|
|
new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );
|
||
|
|
|
||
|
|
ITransform2D t = Transform2D.GetTransformer( xAxis, yAxis );
|
||
|
|
|
||
|
|
int numberPoints = data.Count;
|
||
|
|
|
||
|
|
if (data.Count == 0)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// clipping is now handled assigning a clip region in the
|
||
|
|
// graphic object before this call
|
||
|
|
if (numberPoints == 1)
|
||
|
|
{
|
||
|
|
PointF physical = t.Transform( data[0] );
|
||
|
|
|
||
|
|
if (drawShadow)
|
||
|
|
{
|
||
|
|
g.DrawLine( shadowPen,
|
||
|
|
physical.X - 0.5f + this.ShadowOffset.X,
|
||
|
|
physical.Y + this.ShadowOffset.Y,
|
||
|
|
physical.X + 0.5f + this.ShadowOffset.X,
|
||
|
|
physical.Y + this.ShadowOffset.Y );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
g.DrawLine( Pen, physical.X-0.5f, physical.Y, physical.X+0.5f, physical.Y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
|
||
|
|
// prepare for clipping
|
||
|
|
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
|
||
|
|
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
|
||
|
|
if (leftCutoff > rightCutoff)
|
||
|
|
{
|
||
|
|
Utils.Swap(ref leftCutoff, ref rightCutoff);
|
||
|
|
}
|
||
|
|
if (drawShadow)
|
||
|
|
{
|
||
|
|
// correct cut-offs
|
||
|
|
double shadowCorrection =
|
||
|
|
xAxis.PhysicalToWorld(ShadowOffset, false) - xAxis.PhysicalToWorld(new Point(0,0), false);
|
||
|
|
leftCutoff -= shadowCorrection;
|
||
|
|
rightCutoff -= shadowCorrection;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (int i = 1; i < numberPoints; ++i)
|
||
|
|
{
|
||
|
|
// check to see if any values null. If so, then continue.
|
||
|
|
double dx1 = data[i-1].X;
|
||
|
|
double dx2 = data[i].X;
|
||
|
|
double dy1 = data[i-1].Y;
|
||
|
|
double dy2 = data[i].Y;
|
||
|
|
if ( Double.IsNaN(dx1) || Double.IsNaN(dy1) ||
|
||
|
|
Double.IsNaN(dx2) || Double.IsNaN(dy2) )
|
||
|
|
{
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// do horizontal clipping here, to speed up
|
||
|
|
if ((dx1 < leftCutoff || rightCutoff < dx1) &&
|
||
|
|
(dx2 < leftCutoff || rightCutoff < dx2))
|
||
|
|
{
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// else draw line.
|
||
|
|
PointF p1 = t.Transform( data[i-1] );
|
||
|
|
PointF p2 = t.Transform( data[i] );
|
||
|
|
|
||
|
|
// when very far zoomed in, points can fall ontop of each other,
|
||
|
|
// and g.DrawLine throws an overflow exception
|
||
|
|
if (p1.Equals(p2))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if (drawShadow)
|
||
|
|
{
|
||
|
|
g.DrawLine( shadowPen,
|
||
|
|
p1.X + ShadowOffset.X,
|
||
|
|
p1.Y + ShadowOffset.Y,
|
||
|
|
p2.X + ShadowOffset.X,
|
||
|
|
p2.Y + ShadowOffset.Y );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
g.DrawLine( Pen, p1.X, p1.Y, p2.X, p2.Y );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Draws the line plot on a GDI+ surface against the provided x and y axes.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="g">The GDI+ surface on which to draw.</param>
|
||
|
|
/// <param name="xAxis">The X-Axis to draw against.</param>
|
||
|
|
/// <param name="yAxis">The Y-Axis to draw against.</param>
|
||
|
|
public void Draw( Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
|
||
|
|
{
|
||
|
|
if (this.shadow_)
|
||
|
|
{
|
||
|
|
this.DrawLineOrShadow( g, xAxis, yAxis, true );
|
||
|
|
}
|
||
|
|
|
||
|
|
this.DrawLineOrShadow( g, xAxis, yAxis, false );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns an x-axis that is suitable for drawing this plot.
|
||
|
|
/// </summary>
|
||
|
|
/// <returns>A suitable x-axis.</returns>
|
||
|
|
public Axis SuggestXAxis()
|
||
|
|
{
|
||
|
|
SequenceAdapter data_ =
|
||
|
|
new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );
|
||
|
|
|
||
|
|
return data_.SuggestXAxis();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns a y-axis that is suitable for drawing this plot.
|
||
|
|
/// </summary>
|
||
|
|
/// <returns>A suitable y-axis.</returns>
|
||
|
|
public Axis SuggestYAxis()
|
||
|
|
{
|
||
|
|
SequenceAdapter data_ =
|
||
|
|
new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );
|
||
|
|
|
||
|
|
return data_.SuggestYAxis();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// If true, draw a shadow under the line.
|
||
|
|
/// </summary>
|
||
|
|
public bool Shadow
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
return shadow_;
|
||
|
|
}
|
||
|
|
set
|
||
|
|
{
|
||
|
|
shadow_ = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
private bool shadow_ = false;
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Color of line shadow if drawn. Use Shadow method to turn shadow on and off.
|
||
|
|
/// </summary>
|
||
|
|
public Color ShadowColor
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
return shadowColor_;
|
||
|
|
}
|
||
|
|
set
|
||
|
|
{
|
||
|
|
shadowColor_ = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
private Color shadowColor_ = Color.FromArgb(100,100,100);
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Offset of shadow line from primary line.
|
||
|
|
/// </summary>
|
||
|
|
public Point ShadowOffset
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
return shadowOffset_;
|
||
|
|
}
|
||
|
|
set
|
||
|
|
{
|
||
|
|
shadowOffset_ = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
private Point shadowOffset_ = new Point( 1, 1 );
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Draws a representation of this plot in the legend.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="g">The graphics surface on which to draw.</param>
|
||
|
|
/// <param name="startEnd">A rectangle specifying the bounds of the area in the legend set aside for drawing.</param>
|
||
|
|
public virtual void DrawInLegend(Graphics g, Rectangle startEnd)
|
||
|
|
{
|
||
|
|
g.DrawLine(pen_, startEnd.Left, (startEnd.Top + startEnd.Bottom) / 2,
|
||
|
|
startEnd.Right, (startEnd.Top + startEnd.Bottom) / 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// The pen used to draw the plot
|
||
|
|
/// </summary>
|
||
|
|
public System.Drawing.Pen Pen
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
return pen_;
|
||
|
|
}
|
||
|
|
set
|
||
|
|
{
|
||
|
|
pen_ = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
private System.Drawing.Pen pen_ = new Pen(Color.Black);
|
||
|
|
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// The color of the pen used to draw lines in this plot.
|
||
|
|
/// </summary>
|
||
|
|
public System.Drawing.Color Color
|
||
|
|
{
|
||
|
|
set
|
||
|
|
{
|
||
|
|
if (pen_ != null)
|
||
|
|
{
|
||
|
|
pen_.Color = value;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pen_ = new Pen(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
get
|
||
|
|
{
|
||
|
|
return pen_.Color;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|