/// <summary>
/// Draws the point 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 virtual void Draw(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data_ =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
float leftCutoff_ = xAxis.PhysicalMin.X - marker_.Size;
float rightCutoff_ = xAxis.PhysicalMax.X + marker_.Size;
for (int i = 0; i < data_.Count; ++i)
{
if (!Double.IsNaN(data_[i].X) && !Double.IsNaN(data_[i].Y))
{
PointF xPos = xAxis.WorldToPhysical(data_[i].X, false);
if (xPos.X < leftCutoff_ || rightCutoff_ < xPos.X)
{
continue;
}
PointF yPos = yAxis.WorldToPhysical(data_[i].Y, false);
marker_.Draw(g, (int)xPos.X, (int)yPos.Y);
if (marker_.DropLine)
{
PointD yMin = new PointD(data_[i].X, Math.Max(0.0f, yAxis.Axis.WorldMin));
PointF yStart = yAxis.WorldToPhysical(yMin.Y, false);
g.DrawLine(marker_.Pen, (int)xPos.X, (int)yStart.Y, (int)xPos.X, (int)yPos.Y);
}
}
}
}
/// <summary>
/// Draws the point 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 virtual void Draw( Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
SequenceAdapter data_ =
new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );
float leftCutoff_ = xAxis.PhysicalMin.X - marker_.Size;
float rightCutoff_ = xAxis.PhysicalMax.X + marker_.Size;
for (int i=0; i<data_.Count; ++i)
{
if ( !Double.IsNaN(data_[i].X) && !Double.IsNaN(data_[i].Y) )
{
PointF xPos = xAxis.WorldToPhysical( data_[i].X, false);
if (xPos.X < leftCutoff_ || rightCutoff_ < xPos.X)
continue;
PointF yPos = yAxis.WorldToPhysical( data_[i].Y, false);
marker_.Draw( g, (int)xPos.X, (int)yPos.Y );
if (marker_.DropLine)
{
PointD yMin = new PointD( data_[i].X, Math.Max( 0.0f, yAxis.Axis.WorldMin ) );
PointF yStart = yAxis.WorldToPhysical( yMin.Y, false );
g.DrawLine( marker_.Pen, (int)xPos.X,(int)yStart.Y, (int)xPos.X,(int)yPos.Y );
}
}
}
}
/// <summary>
/// Calculates the physical (not world) separation between abscissa values.
/// </summary>
/// <param name="cd">Candle adapter containing data</param>
/// <param name="xAxis">Physical x axis the data is plotted against.</param>
/// <returns>physical separation between abscissa values.</returns>
private static float CalculatePhysicalSeparation(CandleDataAdapter cd, PhysicalAxis xAxis)
{
if (cd.Count > 1)
{
int xPos1 = (int)(xAxis.WorldToPhysical(((PointOLHC)cd[0]).X, false)).X;
int xPos2 = (int)(xAxis.WorldToPhysical(((PointOLHC)cd[1]).X, false)).X;
int minDist = xPos2 - xPos1;
if (cd.Count > 2)
{ // to be pretty sure we get the smallest gap.
int xPos3 = (int)(xAxis.WorldToPhysical(((PointOLHC)cd[2]).X, false)).X;
if (xPos3 - xPos2 < minDist)
{
minDist = xPos3 - xPos2;
}
if (cd.Count > 3)
{
int xPos4 = (int)(xAxis.WorldToPhysical(((PointOLHC)cd[3]).X, false)).X;
if (xPos4 - xPos3 < minDist)
{
minDist = xPos4 - xPos3;
}
}
}
return(minDist);
}
return(0.0f);
}
/// <summary>
/// Draws the marker on a plot surface.
/// </summary>
/// <param name="g">graphics 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(System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
PointF point = new PointF(
xAxis.WorldToPhysical(x_, true).X,
yAxis.WorldToPhysical(y_, true).Y);
marker_.Draw(g, (int)point.X, (int)point.Y);
}
/// <summary>
/// Draws the text on a plot surface.
/// </summary>
/// <param name="g">graphics 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(System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
Point startPoint = new Point(
(int)xAxis.WorldToPhysical(start_.X, true).X,
(int)yAxis.WorldToPhysical(start_.Y, true).Y);
g.DrawString(text_, font_, textBrush_, (int)startPoint.X, (int)startPoint.Y);
}
/// <summary>
/// Draws the marker on a plot surface.
/// </summary>
/// <param name="g">graphics 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( System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
PointF point = new PointF(
xAxis.WorldToPhysical( x_, true ).X,
yAxis.WorldToPhysical( y_, true ).Y );
marker_.Draw( g, (int)point.X, (int)point.Y );
}
/// <summary>
/// Draws the 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 override void Draw(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
TextDataAdapter textData =
new TextDataAdapter(this.DataSource, this.DataMember, this.TextData);
// first plot the marker
// we can do this cast, since the constructor accepts only this type!
for (int i = 0; i < data.Count; ++i)
{
try
{
PointD pt = data[i];
if (!Double.IsNaN(pt.X) && !Double.IsNaN(pt.Y))
{
PointF xPos = xAxis.WorldToPhysical(pt.X, false);
PointF yPos = yAxis.WorldToPhysical(pt.Y, false);
Marker.Draw(g, (int)xPos.X, (int)yPos.Y);
if (textData[i] != "")
{
SizeF size = g.MeasureString(textData[i], this.Font);
Brush brush = new SolidBrush(Color.Black);
switch (labelTextPosition_)
{
case LabelPositions.Above:
g.DrawString(textData[i], font_, brush, xPos.X - size.Width / 2, yPos.Y - size.Height - Marker.Size * 2 / 3);
break;
case LabelPositions.Below:
g.DrawString(textData[i], font_, brush, xPos.X - size.Width / 2, yPos.Y + Marker.Size * 2 / 3);
break;
case LabelPositions.Left:
g.DrawString(textData[i], font_, brush, xPos.X - size.Width - Marker.Size * 2 / 3, yPos.Y - size.Height / 2);
break;
case LabelPositions.Right:
g.DrawString(textData[i], font_, brush, xPos.X + Marker.Size * 2 / 3, yPos.Y - size.Height / 2);
break;
}
}
}
}
catch
{
throw new NPlotException("Error in TextPlot.Draw");
}
}
}
/// <summary>
/// Draws the vertical 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(System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
int yMin = yAxis.PhysicalMin.Y;
int yMax = yAxis.PhysicalMax.Y;
yMin -= pixelIndent_;
yMax += pixelIndent_;
float length = Math.Abs(yMax - yMin);
float lengthDiff = length - length * scale_;
float indentAmount = lengthDiff / 2;
yMin -= (int)indentAmount;
yMax += (int)indentAmount;
int xPos = (int)xAxis.WorldToPhysical(value_, false).X;
g.DrawLine(pen_, xPos, yMin, xPos, yMax);
// todo: clip and proper logic for flipped axis min max.
}
/// <summary>
/// Draws the horizontal 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(System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
int xMin = xAxis.PhysicalMin.X;
int xMax = xAxis.PhysicalMax.X;
xMin += pixelIndent_;
xMax -= pixelIndent_;
float length = Math.Abs(xMax - xMin);
float lengthDiff = length - length * scale_;
float indentAmount = lengthDiff / 2;
xMin += (int)indentAmount;
xMax -= (int)indentAmount;
int yPos = (int)yAxis.WorldToPhysical(value_, false).Y;
g.DrawLine(pen_, xMin, yPos, xMax, yPos);
Brush brush = new SolidBrush(Color.SlateBlue);
g.DrawString("" + (int)value_, new Font(FontFamily.GenericSerif, 8f, FontStyle.Regular), brush, xMax - 20, yPos - 6);
// todo: clip and proper logic for flipped axis min max.
}
/// <summary>
/// Does all the work in drawing grid lines.
/// </summary>
/// <param name="g">The graphics surface on which to render.</param>
/// <param name="axis">TODO</param>
/// <param name="orthogonalAxis">TODO</param>
/// <param name="a">the list of world values to draw grid lines at.</param>
/// <param name="horizontal">true if want horizontal lines, false otherwise.</param>
/// <param name="p">the pen to use to draw the grid lines.</param>
private void DrawGridLines(
Graphics g, PhysicalAxis axis, PhysicalAxis orthogonalAxis,
System.Collections.ArrayList a, bool horizontal, Pen p)
{
for (int i = 0; i < a.Count; ++i)
{
PointF p1 = axis.WorldToPhysical((double)a[i], true);
PointF p2 = p1;
Point p3 = orthogonalAxis.PhysicalMax;
Point p4 = orthogonalAxis.PhysicalMin;
if (horizontal)
{
p1.Y = p4.Y;
p2.Y = p3.Y;
}
else
{
p1.X = p4.X;
p2.X = p3.X;
}
// note: casting all drawing was necessary for sane display. why?
g.DrawLine(p, (int)p1.X, (int)p1.Y, (int)p2.X, (int)p2.Y);
}
}
/// <summary>
/// Draw on to the supplied graphics surface against the supplied axes.
/// </summary>
/// <param name="g">The graphics 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>
/// <remarks>TODO: block positions may be off by a pixel or so. maybe. Re-think calculations</remarks>
public void Draw(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
if (data_ == null || data_.GetLength(0) == 0 || data_.GetLength(1) == 0)
{
return;
}
double worldWidth = xAxis.Axis.WorldMax - xAxis.Axis.WorldMin;
double numBlocksHorizontal = worldWidth / this.xStep_;
double worldHeight = yAxis.Axis.WorldMax - yAxis.Axis.WorldMin;
double numBlocksVertical = worldHeight / this.yStep_;
double physicalWidth = xAxis.PhysicalMax.X - xAxis.PhysicalMin.X;
double blockWidth = physicalWidth / numBlocksHorizontal;
bool wPositive = true;
if (blockWidth < 0.0)
{
wPositive = false;
}
blockWidth = Math.Abs(blockWidth) + 1;
double physicalHeight = yAxis.PhysicalMax.Y - yAxis.PhysicalMin.Y;
double blockHeight = physicalHeight / numBlocksVertical;
bool hPositive = true;
if (blockHeight < 0.0)
{
hPositive = false;
}
blockHeight = Math.Abs(blockHeight) + 1;
for (int i = 0; i < data_.GetLength(0); ++i)
{
for (int j = 0; j < data_.GetLength(1); ++j)
{
double wX = (double)j * this.xStep_ + xStart_;
double wY = (double)i * this.yStep_ + yStart_;
if (!hPositive)
{
wY += yStep_;
}
if (!wPositive)
{
wX += xStep_;
}
if (this.center_)
{
wX -= this.xStep_ / 2.0;
wY -= this.yStep_ / 2.0;
}
Pen p = new Pen(this.Gradient.GetColor((data_[i, j] - this.dataMin_) / (this.dataMax_ - this.dataMin_)));
int x = (int)xAxis.WorldToPhysical(wX, false).X;
int y = (int)yAxis.WorldToPhysical(wY, false).Y;
Brush brush = new SolidBrush(p.Color);
g.FillRectangle(brush,
x,
y,
(int)blockWidth,
(int)blockHeight);
//g.DrawRectangle(Pens.White,x,y,(int)blockWidth,(int)blockHeight);
}
}
}
/// <summary>
/// Transforms the given world point to physical coordinates
/// </summary>
/// <param name="x">x coordinate of world point to transform.</param>
/// <param name="y">y coordinate of world point to transform.</param>
/// <returns>the corresponding physical point.</returns>
public Point Transform(double x, double y)
{
return(new Point(
(int)xAxis_.WorldToPhysical(x, false).X,
(int)yAxis_.WorldToPhysical(y, false).Y));
}
/// <summary>
/// Does all the work in drawing grid lines.
/// </summary>
/// <param name="g">The graphics surface on which to render.</param>
/// <param name="axis">TODO</param>
/// <param name="orthogonalAxis">TODO</param>
/// <param name="a">the list of world values to draw grid lines at.</param>
/// <param name="horizontal">true if want horizontal lines, false otherwise.</param>
/// <param name="p">the pen to use to draw the grid lines.</param>
private void DrawGridLines(
Graphics g, PhysicalAxis axis, PhysicalAxis orthogonalAxis,
System.Collections.ArrayList a, bool horizontal, Pen p)
{
for (int i=0; i<a.Count; ++i)
{
PointF p1 = axis.WorldToPhysical((double)a[i], true);
PointF p2 = p1;
Point p3 = orthogonalAxis.PhysicalMax;
Point p4 = orthogonalAxis.PhysicalMin;
if (horizontal)
{
p1.Y = p4.Y;
p2.Y = p3.Y;
}
else
{
p1.X = p4.X;
p2.X = p3.X;
}
// note: casting all drawing was necessary for sane display. why?
g.DrawLine( p, (int)p1.X, (int)p1.Y, (int)p2.X, (int)p2.Y );
}
}
/// <summary>
/// Draw on to the supplied graphics surface against the supplied axes.
/// </summary>
/// <param name="g">The graphics 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>
/// <remarks>TODO: block positions may be off by a pixel or so. maybe. Re-think calculations</remarks>
public void Draw( Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
if ( data_==null || data_.GetLength(0) == 0 || data_.GetLength(1) == 0 )
{
return;
}
double worldWidth = xAxis.Axis.WorldMax - xAxis.Axis.WorldMin;
double numBlocksHorizontal = worldWidth / this.xStep_;
double worldHeight = yAxis.Axis.WorldMax - yAxis.Axis.WorldMin;
double numBlocksVertical = worldHeight / this.yStep_;
double physicalWidth = xAxis.PhysicalMax.X - xAxis.PhysicalMin.X;
double blockWidth = physicalWidth / numBlocksHorizontal;
bool wPositive = true;
if (blockWidth < 0.0)
{
wPositive = false;
}
blockWidth = Math.Abs(blockWidth)+1;
double physicalHeight = yAxis.PhysicalMax.Y - yAxis.PhysicalMin.Y;
double blockHeight = physicalHeight / numBlocksVertical;
bool hPositive = true;
if (blockHeight < 0.0)
{
hPositive = false;
}
blockHeight = Math.Abs(blockHeight)+1;
for (int i=0; i<data_.GetLength(0); ++i)
{
for (int j=0; j<data_.GetLength(1); ++j)
{
double wX = (double)j*this.xStep_ + xStart_;
double wY = (double)i*this.yStep_ + yStart_;
if ( !hPositive )
{
wY += yStep_;
}
if (!wPositive )
{
wX += xStep_;
}
if (this.center_)
{
wX -= this.xStep_/2.0;
wY -= this.yStep_/2.0;
}
Pen p = new Pen( this.Gradient.GetColor( (data_[i,j]-this.dataMin_)/(this.dataMax_-this.dataMin_) ) );
int x = (int)xAxis.WorldToPhysical(wX,false).X;
int y = (int)yAxis.WorldToPhysical(wY,false).Y;
Brush brush = new SolidBrush(p.Color);
g.FillRectangle( brush,
x,
y,
(int)blockWidth,
(int)blockHeight);
//g.DrawRectangle(Pens.White,x,y,(int)blockWidth,(int)blockHeight);
}
}
}
/// <summary>
/// Calculates the physical (not world) separation between abscissa values.
/// </summary>
/// <param name="cd">Candle adapter containing data</param>
/// <param name="xAxis">Physical x axis the data is plotted against.</param>
/// <returns>physical separation between abscissa values.</returns>
private static float CalculatePhysicalSeparation( CandleDataAdapter cd, PhysicalAxis xAxis )
{
if (cd.Count > 1)
{
int xPos1 = (int)(xAxis.WorldToPhysical( ((PointOLHC)cd[0]).X, false )).X;
int xPos2 = (int)(xAxis.WorldToPhysical( ((PointOLHC)cd[1]).X, false )).X;
int minDist = xPos2 - xPos1;
if (cd.Count > 2)
{ // to be pretty sure we get the smallest gap.
int xPos3 = (int)(xAxis.WorldToPhysical(((PointOLHC)cd[2]).X, false)).X;
if (xPos3 - xPos2 < minDist) minDist = xPos3 - xPos2;
if (cd.Count > 3)
{
int xPos4 = (int)(xAxis.WorldToPhysical(((PointOLHC)cd[3]).X, false)).X;
if (xPos4 - xPos3 < minDist) minDist = xPos4 - xPos3;
}
}
return minDist;
}
return 0.0f;
}
/// <summary>
/// Draws the candle plot on a GDI+ surface agains 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 )
{
CandleDataAdapter cd = new CandleDataAdapter( this.DataSource, this.DataMember,
this.AbscissaData, this.OpenData, this.LowData, this.HighData, this.CloseData );
Brush bearishBrush = new SolidBrush( BearishColor );
Brush bullishBrush = new SolidBrush( BullishColor );
uint offset = 0;
if (this.centered_)
{
offset = (uint)(CalculatePhysicalSeparation(cd,xAxis) / 2.0f);
}
uint addAmount = (uint)StickWidth/2;
uint stickWidth = (uint)StickWidth;
if (StickWidth == AutoScaleStickWidth)
{
// default
addAmount = 2;
stickWidth = 4;
float minDist = CalculatePhysicalSeparation( cd, xAxis );
addAmount = (uint)(minDist / 3);
stickWidth = addAmount * 2;
}
Pen p = new Pen(this.color_);
/*
// brant hyatt proposed.
if (this.Style == Styles.Stick)
{
p.Width = stickWidth;
addAmount = stickWidth + 2;
}
*/
for (int i=0; i<cd.Count; ++i)
{
PointOLHC point = (PointOLHC)cd[i];
if ( (!double.IsNaN (point.Open)) && (!double.IsNaN(point.High)) && (!double.IsNaN (point.Low)) && (!double.IsNaN(point.Close)) )
{
int xPos = (int)(xAxis.WorldToPhysical( point.X, false )).X;
if (xPos + offset + addAmount < xAxis.PhysicalMin.X || xAxis.PhysicalMax.X < xPos + offset - addAmount)
continue;
int yPos1 = (int)(yAxis.WorldToPhysical( point.Low, false )).Y;
int yPos2 = (int)(yAxis.WorldToPhysical( point.High, false )).Y;
int yPos3 = (int)(yAxis.WorldToPhysical( point.Open, false )).Y;
int yPos4 = (int)(yAxis.WorldToPhysical( point.Close, false )).Y;
if (this.Style == Styles.Stick)
{
/*
// brant hyatt proposed.
if (i > 0)
{
if ( ((PointOLHC)cd[i]).Close > ((PointOLHC)cd[i-1]).Close)
{
p.Color = BullishColor;
}
else
{
p.Color = BearishColor;
}
}
*/
g.DrawLine(p, (int)(xPos + offset), yPos1, (int)(xPos + offset), yPos2);
g.DrawLine(p, (int)(xPos - addAmount + offset), yPos3, (int)(xPos + offset), yPos3);
g.DrawLine(p, (int)(xPos + offset), yPos4, (int)(xPos + addAmount + offset), yPos4);
}
else if (this.Style == Styles.Filled)
{
g.DrawLine(p, xPos + (int)offset, yPos1, xPos + (int)offset, yPos2);
if (yPos3 > yPos4)
{
g.FillRectangle(bullishBrush, xPos - (int)addAmount + (int)offset, yPos4, (int)stickWidth, yPos3 - yPos4);
g.DrawRectangle(p, xPos - (int)addAmount + (int)offset, yPos4, (int)stickWidth, yPos3 - yPos4);
}
else if (yPos3 < yPos4)
{
g.FillRectangle(bearishBrush, xPos - (int)addAmount + (int)offset, yPos3, (int)stickWidth, yPos4 - yPos3);
g.DrawRectangle(p, xPos - (int)addAmount + (int)offset, yPos3, (int)stickWidth, yPos4 - yPos3);
}
else
{
g.DrawLine(p, xPos - (int)addAmount + (int)offset, yPos3, xPos - (int)addAmount + (int)stickWidth + (int)offset, yPos3);
}
}
}
}
}
/// <summary>
/// Draws the step 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 virtual void Draw(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
for (int i = 0; i < data.Count; ++i)
{
PointD p1 = data[i];
if (Double.IsNaN(p1.X) || Double.IsNaN(p1.Y))
{
continue;
}
PointD p2;
PointD p3;
if (i + 1 != data.Count)
{
p2 = data[i + 1];
if (Double.IsNaN(p2.X) || Double.IsNaN(p2.Y))
{
continue;
}
p2.Y = p1.Y;
p3 = data[i + 1];
}
else
{
// Check that we are not dealing with a DataSource of 1 point.
// This check is done here so it is only checked on the end
// condition and not for every point in the DataSource.
if (data.Count > 1)
{
p2 = data[i - 1];
}
else
{
// TODO: Once log4net is set up post a message to the user that a step-plot of 1 really does not make any sense.
p2 = p1;
}
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
p3 = p2;
}
if (this.center_)
{
double offset = (p2.X - p1.X) / 2.0f;
p1.X -= offset;
p2.X -= offset;
p3.X -= offset;
}
PointF xPos1 = xAxis.WorldToPhysical(p1.X, false);
PointF yPos1 = yAxis.WorldToPhysical(p1.Y, false);
PointF xPos2 = xAxis.WorldToPhysical(p2.X, false);
PointF yPos2 = yAxis.WorldToPhysical(p2.Y, false);
PointF xPos3 = xAxis.WorldToPhysical(p3.X, false);
PointF yPos3 = yAxis.WorldToPhysical(p3.Y, false);
// do horizontal clipping here, to speed up
if ((p1.X < leftCutoff || p1.X > rightCutoff) &&
(p2.X < leftCutoff || p2.X > rightCutoff) &&
(p3.X < leftCutoff || p3.X > rightCutoff))
{
continue;
}
if (!this.hideHorizontalSegments_)
{
if (scale_ != 1.0f)
{
float middle = (xPos2.X + xPos1.X) / 2.0f;
float width = xPos2.X - xPos1.X;
width *= this.scale_;
g.DrawLine(Pen, (int)(middle - width / 2.0f), (int)yPos1.Y, (int)(middle + width / 2.0f), (int)yPos2.Y);
}
else
{
g.DrawLine(Pen, (int)xPos1.X, (int)yPos1.Y, (int)xPos2.X, (int)yPos2.Y);
}
}
if (!this.hideVerticalSegments_)
{
g.DrawLine(Pen, (int)xPos2.X, (int)yPos2.Y, (int)xPos3.X, (int)yPos3.Y);
}
}
}
/// <summary>
/// Renders the histogram.
/// </summary>
/// <param name="g">The Graphics 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)
{
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
float yoff;
for (int i = 0; i < data.Count; ++i)
{
// (1) determine the top left hand point of the bar (assuming not centered)
PointD p1 = data[i];
if (double.IsNaN(p1.X) || double.IsNaN(p1.Y))
{
continue;
}
// (2) determine the top right hand point of the bar (assuming not centered)
PointD p2;
if (i + 1 != data.Count)
{
p2 = data[i + 1];
if (double.IsNaN(p2.X) || double.IsNaN(p2.Y))
{
continue;
}
p2.Y = p1.Y;
}
else if (i != 0)
{
p2 = data[i - 1];
if (double.IsNaN(p2.X) || double.IsNaN(p2.Y))
{
continue;
}
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
}
else
{
double offset = 1.0f;
p2.X = p1.X + offset;
p2.Y = p1.Y;
}
// (3) now account for plots this may be stacked on top of.
HistogramPlot currentPlot = this;
yoff = 0.0f;
double yval = 0.0f;
while (currentPlot.isStacked_)
{
SequenceAdapter stackedToData = new SequenceAdapter(
currentPlot.stackedTo_.DataSource,
currentPlot.stackedTo_.DataMember,
currentPlot.stackedTo_.OrdinateData,
currentPlot.stackedTo_.AbscissaData);
yval += stackedToData[i].Y;
yoff = yAxis.WorldToPhysical(yval, false).Y;
p1.Y += stackedToData[i].Y;
p2.Y += stackedToData[i].Y;
currentPlot = currentPlot.stackedTo_;
}
// (4) now account for centering
if (center_)
{
double offset = (p2.X - p1.X) / 2.0f;
p1.X -= offset;
p2.X -= offset;
}
// (5) now account for BaseOffset (shift of bar sideways).
p1.X += baseOffset_;
p2.X += baseOffset_;
// (6) now get physical coordinates of top two points.
PointF xPos1 = xAxis.WorldToPhysical(p1.X, false);
PointF yPos1 = yAxis.WorldToPhysical(p1.Y, false);
PointF xPos2 = xAxis.WorldToPhysical(p2.X, false);
PointF yPos2 = yAxis.WorldToPhysical(p2.Y, false);
if (isStacked_)
{
currentPlot = this;
while (currentPlot.isStacked_)
{
currentPlot = currentPlot.stackedTo_;
}
this.baseWidth_ = currentPlot.baseWidth_;
}
float width = xPos2.X - xPos1.X;
float height;
if (isStacked_)
{
height = -yPos1.Y + yoff;
}
else
{
height = -yPos1.Y + yAxis.PhysicalMin.Y;
}
float xoff = (1.0f - baseWidth_) / 2.0f * width;
Rectangle r = new Rectangle((int)(xPos1.X + xoff), (int)yPos1.Y, (int)(width - 2 * xoff), (int)height);
if (this.Filled)
{
if (r.Height != 0 && r.Width != 0)
{
// room for optimization maybe.
g.FillRectangle(rectangleBrush_.Get(r), r);
}
}
g.DrawRectangle(Pen, r.X, r.Y, r.Width, r.Height);
}
}
/// <summary>
/// Renders the histogram.
/// </summary>
/// <param name="g">The Graphics 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 )
{
SequenceAdapter data =
new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );
float yoff;
for ( int i=0; i<data.Count; ++i )
{
// (1) determine the top left hand point of the bar (assuming not centered)
PointD p1 = data[i];
if ( double.IsNaN(p1.X) || double.IsNaN(p1.Y) )
continue;
// (2) determine the top right hand point of the bar (assuming not centered)
PointD p2;
if (i+1 != data.Count)
{
p2 = data[i+1];
if ( double.IsNaN(p2.X) || double.IsNaN(p2.Y) )
continue;
p2.Y = p1.Y;
}
else if (i != 0)
{
p2 = data[i-1];
if ( double.IsNaN(p2.X) || double.IsNaN(p2.Y) )
continue;
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
}
else
{
double offset = 1.0f;
p2.X = p1.X + offset;
p2.Y = p1.Y;
}
// (3) now account for plots this may be stacked on top of.
HistogramPlot currentPlot = this;
yoff = 0.0f;
double yval = 0.0f;
while (currentPlot.isStacked_)
{
SequenceAdapter stackedToData = new SequenceAdapter(
currentPlot.stackedTo_.DataSource,
currentPlot.stackedTo_.DataMember,
currentPlot.stackedTo_.OrdinateData,
currentPlot.stackedTo_.AbscissaData );
yval += stackedToData[i].Y;
yoff = yAxis.WorldToPhysical( yval, false ).Y;
p1.Y += stackedToData[i].Y;
p2.Y += stackedToData[i].Y;
currentPlot = currentPlot.stackedTo_;
}
// (4) now account for centering
if ( center_ )
{
double offset = ( p2.X - p1.X ) / 2.0f;
p1.X -= offset;
p2.X -= offset;
}
// (5) now account for BaseOffset (shift of bar sideways).
p1.X += baseOffset_;
p2.X += baseOffset_;
// (6) now get physical coordinates of top two points.
PointF xPos1 = xAxis.WorldToPhysical( p1.X, false );
PointF yPos1 = yAxis.WorldToPhysical( p1.Y, false );
PointF xPos2 = xAxis.WorldToPhysical( p2.X, false );
PointF yPos2 = yAxis.WorldToPhysical( p2.Y, false );
if (isStacked_)
{
currentPlot = this;
while (currentPlot.isStacked_)
{
currentPlot = currentPlot.stackedTo_;
}
this.baseWidth_ = currentPlot.baseWidth_;
}
float width = xPos2.X - xPos1.X;
float height;
if (isStacked_)
{
height = -yPos1.Y+yoff;
}
else
{
height = -yPos1.Y+yAxis.PhysicalMin.Y;
}
float xoff = (1.0f - baseWidth_)/2.0f*width;
Rectangle r = new Rectangle( (int)(xPos1.X+xoff), (int)yPos1.Y, (int)(width-2*xoff), (int)height );
if (this.Filled)
{
if (r.Height != 0 && r.Width != 0)
{
// room for optimization maybe.
g.FillRectangle( rectangleBrush_.Get(r), r );
}
}
g.DrawRectangle( Pen, r.X, r.Y, r.Width, r.Height );
}
}
/// <summary>
/// Draws the candle plot on a GDI+ surface agains 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)
{
CandleDataAdapter cd = new CandleDataAdapter(this.DataSource, this.DataMember,
this.AbscissaData, this.OpenData, this.LowData, this.HighData, this.CloseData);
Brush bearishBrush = new SolidBrush(BearishColor);
Brush bullishBrush = new SolidBrush(BullishColor);
uint offset = 0;
if (this.centered_)
{
offset = (uint)(CalculatePhysicalSeparation(cd, xAxis) / 2.0f);
}
uint addAmount = (uint)StickWidth / 2;
uint stickWidth = (uint)StickWidth;
if (StickWidth == AutoScaleStickWidth)
{
// default
addAmount = 2;
stickWidth = 4;
float minDist = CalculatePhysicalSeparation(cd, xAxis);
addAmount = (uint)(minDist / 3);
stickWidth = addAmount * 2;
}
Pen p = new Pen(this.color_);
/*
* // brant hyatt proposed.
* if (this.Style == Styles.Stick)
* {
* p.Width = stickWidth;
* addAmount = stickWidth + 2;
* }
*/
for (int i = 0; i < cd.Count; ++i)
{
PointOLHC point = (PointOLHC)cd[i];
if ((!double.IsNaN(point.Open)) && (!double.IsNaN(point.High)) && (!double.IsNaN(point.Low)) && (!double.IsNaN(point.Close)))
{
int xPos = (int)(xAxis.WorldToPhysical(point.X, false)).X;
if (xPos + offset + addAmount < xAxis.PhysicalMin.X || xAxis.PhysicalMax.X < xPos + offset - addAmount)
{
continue;
}
int yPos1 = (int)(yAxis.WorldToPhysical(point.Low, false)).Y;
int yPos2 = (int)(yAxis.WorldToPhysical(point.High, false)).Y;
int yPos3 = (int)(yAxis.WorldToPhysical(point.Open, false)).Y;
int yPos4 = (int)(yAxis.WorldToPhysical(point.Close, false)).Y;
if (this.Style == Styles.Stick)
{
/*
* // brant hyatt proposed.
* if (i > 0)
* {
* if ( ((PointOLHC)cd[i]).Close > ((PointOLHC)cd[i-1]).Close)
* {
* p.Color = BullishColor;
* }
* else
* {
* p.Color = BearishColor;
* }
* }
*/
g.DrawLine(p, (int)(xPos + offset), yPos1, (int)(xPos + offset), yPos2);
g.DrawLine(p, (int)(xPos - addAmount + offset), yPos3, (int)(xPos + offset), yPos3);
g.DrawLine(p, (int)(xPos + offset), yPos4, (int)(xPos + addAmount + offset), yPos4);
}
else if (this.Style == Styles.Filled)
{
g.DrawLine(p, xPos + (int)offset, yPos1, xPos + (int)offset, yPos2);
if (yPos3 > yPos4)
{
g.FillRectangle(bullishBrush, xPos - (int)addAmount + (int)offset, yPos4, (int)stickWidth, yPos3 - yPos4);
g.DrawRectangle(p, xPos - (int)addAmount + (int)offset, yPos4, (int)stickWidth, yPos3 - yPos4);
}
else if (yPos3 < yPos4)
{
g.FillRectangle(bearishBrush, xPos - (int)addAmount + (int)offset, yPos3, (int)stickWidth, yPos4 - yPos3);
g.DrawRectangle(p, xPos - (int)addAmount + (int)offset, yPos3, (int)stickWidth, yPos4 - yPos3);
}
else
{
g.DrawLine(p, xPos - (int)addAmount + (int)offset, yPos3, xPos - (int)addAmount + (int)stickWidth + (int)offset, yPos3);
}
}
}
}
}
/// <summary>
/// Draws the arrow on a plot surface.
/// </summary>
/// <param name="g">graphics 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( System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
if (this.To.X > xAxis.Axis.WorldMax || this.To.X < xAxis.Axis.WorldMin)
return;
if (this.To.Y > yAxis.Axis.WorldMax || this.To.Y < yAxis.Axis.WorldMin)
return;
double angle = this.angle_;
if (this.angle_ < 0.0)
{
int mul = -(int)(this.angle_ / 360.0) + 2;
angle = angle_ + 360.0 * (double)mul;
}
double normAngle = (double)angle % 360.0; // angle in range 0 -> 360.
Point toPoint = new Point(
(int)xAxis.WorldToPhysical( to_.X, true ).X,
(int)yAxis.WorldToPhysical( to_.Y, true ).Y );
float xDir = (float)Math.Cos( normAngle * 2.0 * Math.PI / 360.0 );
float yDir = (float)Math.Sin( normAngle * 2.0 * Math.PI / 360.0 );
toPoint.X += (int)(xDir*headOffset_);
toPoint.Y += (int)(yDir*headOffset_);
float xOff = physicalLength_ * xDir;
float yOff = physicalLength_ * yDir;
Point fromPoint = new Point(
(int)(toPoint.X + xOff),
(int)(toPoint.Y + yOff) );
//g.DrawLine( pen_, toPoint, fromPoint );
g.DrawLine(pen_, toPoint.X, toPoint.Y, fromPoint.X, fromPoint.Y);
Point[] head = new Point[3];
head[0] = toPoint;
xOff = headSize_ * (float)Math.Cos( (normAngle-headAngle_/2.0f) * 2.0 * Math.PI / 360.0 );
yOff = headSize_ * (float)Math.Sin( (normAngle-headAngle_/2.0f) * 2.0 * Math.PI / 360.0 );
head[1] = new Point(
(int)(toPoint.X + xOff),
(int)(toPoint.Y + yOff) );
float xOff2 = headSize_ * (float)Math.Cos( (normAngle+headAngle_/2.0f) * 2.0 * Math.PI / 360.0 );
float yOff2 = headSize_ * (float)Math.Sin( (normAngle+headAngle_/2.0f) * 2.0 * Math.PI / 360.0 );
head[2] = new Point(
(int)(toPoint.X + xOff2),
(int)(toPoint.Y + yOff2) );
g.FillPolygon( arrowBrush_, head );
SizeF textSize = g.MeasureString( text_, font_ );
SizeF halfSize = new SizeF( textSize.Width / 2.0f, textSize.Height / 2.0f );
float quadrantSlideLength = halfSize.Width + halfSize.Height;
float quadrantF = (float)normAngle / 90.0f; // integer part gives quadrant.
int quadrant = (int)quadrantF; // quadrant in.
float prop = quadrantF - (float)quadrant; // proportion of way through this qadrant.
float dist = prop * quadrantSlideLength; // distance along quarter of bounds rectangle.
// now find the offset from the middle of the text box that the
// rear end of the arrow should end at (reverse this to get position
// of text box with respect to rear end of arrow).
//
// There is almost certainly an elgant way of doing this involving
// trig functions to get all the signs right, but I'm about ready to
// drop off to sleep at the moment, so this blatent method will have
// to do.
PointF offsetFromMiddle = new PointF( 0.0f, 0.0f );
switch (quadrant)
{
case 0:
if (dist > halfSize.Height)
{
dist -= halfSize.Height;
offsetFromMiddle = new PointF( -halfSize.Width + dist, halfSize.Height );
}
else
{
offsetFromMiddle = new PointF( -halfSize.Width, - dist );
}
break;
case 1:
if (dist > halfSize.Width)
{
dist -= halfSize.Width;
offsetFromMiddle = new PointF( halfSize.Width, halfSize.Height - dist );
}
else
{
offsetFromMiddle = new PointF( dist, halfSize.Height );
}
break;
case 2:
if (dist > halfSize.Height)
{
dist -= halfSize.Height;
offsetFromMiddle = new PointF( halfSize.Width - dist, -halfSize.Height );
}
else
{
offsetFromMiddle = new PointF( halfSize.Width, -dist );
}
break;
case 3:
if (dist > halfSize.Width)
{
dist -= halfSize.Width;
offsetFromMiddle = new PointF( -halfSize.Width, -halfSize.Height + dist );
}
else
{
offsetFromMiddle = new PointF( -dist, -halfSize.Height );
}
break;
default:
throw new NPlotException( "Programmer error." );
}
g.DrawString(
text_, font_, textBrush_,
(int)(fromPoint.X - halfSize.Width - offsetFromMiddle.X),
(int)(fromPoint.Y - halfSize.Height + offsetFromMiddle.Y) );
}
/// <summary>
/// Draws the 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 override void Draw( Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
SequenceAdapter data =
new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );
TextDataAdapter textData =
new TextDataAdapter( this.DataSource, this.DataMember, this.TextData );
// first plot the marker
// we can do this cast, since the constructor accepts only this type!
for (int i=0; i<data.Count; ++i)
{
try
{
PointD pt = data[i];
if ( !Double.IsNaN(pt.X) && !Double.IsNaN(pt.Y) )
{
PointF xPos = xAxis.WorldToPhysical( pt.X, false);
PointF yPos = yAxis.WorldToPhysical( pt.Y, false);
Marker.Draw( g, (int)xPos.X, (int)yPos.Y );
if ( textData[i] != "" )
{
SizeF size = g.MeasureString( textData[i], this.Font );
Brush brush = new SolidBrush(Color.Black);
switch (labelTextPosition_)
{
case LabelPositions.Above:
g.DrawString( textData[i], font_, brush, xPos.X-size.Width/2,yPos.Y-size.Height-Marker.Size*2/3);
break;
case LabelPositions.Below:
g.DrawString(textData[i], font_, brush, xPos.X - size.Width / 2, yPos.Y + Marker.Size * 2 / 3);
break;
case LabelPositions.Left:
g.DrawString(textData[i], font_, brush, xPos.X - size.Width - Marker.Size * 2 / 3, yPos.Y - size.Height / 2);
break;
case LabelPositions.Right:
g.DrawString(textData[i], font_, brush, xPos.X + Marker.Size * 2 / 3, yPos.Y - size.Height / 2);
break;
}
}
}
}
catch
{
throw new NPlotException("Error in TextPlot.Draw");
}
}
}
/// <summary>
/// Draws the arrow on a plot surface.
/// </summary>
/// <param name="g">graphics 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(System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
if (this.To.X > xAxis.Axis.WorldMax || this.To.X < xAxis.Axis.WorldMin)
{
return;
}
if (this.To.Y > yAxis.Axis.WorldMax || this.To.Y < yAxis.Axis.WorldMin)
{
return;
}
double angle = this.angle_;
if (this.angle_ < 0.0)
{
int mul = -(int)(this.angle_ / 360.0) + 2;
angle = angle_ + 360.0 * (double)mul;
}
double normAngle = (double)angle % 360.0; // angle in range 0 -> 360.
Point toPoint = new Point(
(int)xAxis.WorldToPhysical(to_.X, true).X,
(int)yAxis.WorldToPhysical(to_.Y, true).Y);
float xDir = (float)Math.Cos(normAngle * 2.0 * Math.PI / 360.0);
float yDir = (float)Math.Sin(normAngle * 2.0 * Math.PI / 360.0);
toPoint.X += (int)(xDir * headOffset_);
toPoint.Y += (int)(yDir * headOffset_);
float xOff = physicalLength_ * xDir;
float yOff = physicalLength_ * yDir;
Point fromPoint = new Point(
(int)(toPoint.X + xOff),
(int)(toPoint.Y + yOff));
//g.DrawLine( pen_, toPoint, fromPoint );
g.DrawLine(pen_, toPoint.X, toPoint.Y, fromPoint.X, fromPoint.Y);
Point[] head = new Point[3];
head[0] = toPoint;
xOff = headSize_ * (float)Math.Cos((normAngle - headAngle_ / 2.0f) * 2.0 * Math.PI / 360.0);
yOff = headSize_ * (float)Math.Sin((normAngle - headAngle_ / 2.0f) * 2.0 * Math.PI / 360.0);
head[1] = new Point(
(int)(toPoint.X + xOff),
(int)(toPoint.Y + yOff));
float xOff2 = headSize_ * (float)Math.Cos((normAngle + headAngle_ / 2.0f) * 2.0 * Math.PI / 360.0);
float yOff2 = headSize_ * (float)Math.Sin((normAngle + headAngle_ / 2.0f) * 2.0 * Math.PI / 360.0);
head[2] = new Point(
(int)(toPoint.X + xOff2),
(int)(toPoint.Y + yOff2));
g.FillPolygon(arrowBrush_, head);
SizeF textSize = g.MeasureString(text_, font_);
SizeF halfSize = new SizeF(textSize.Width / 2.0f, textSize.Height / 2.0f);
float quadrantSlideLength = halfSize.Width + halfSize.Height;
float quadrantF = (float)normAngle / 90.0f; // integer part gives quadrant.
int quadrant = (int)quadrantF; // quadrant in.
float prop = quadrantF - (float)quadrant; // proportion of way through this qadrant.
float dist = prop * quadrantSlideLength; // distance along quarter of bounds rectangle.
// now find the offset from the middle of the text box that the
// rear end of the arrow should end at (reverse this to get position
// of text box with respect to rear end of arrow).
//
// There is almost certainly an elgant way of doing this involving
// trig functions to get all the signs right, but I'm about ready to
// drop off to sleep at the moment, so this blatent method will have
// to do.
PointF offsetFromMiddle = new PointF(0.0f, 0.0f);
switch (quadrant)
{
case 0:
if (dist > halfSize.Height)
{
dist -= halfSize.Height;
offsetFromMiddle = new PointF(-halfSize.Width + dist, halfSize.Height);
}
else
{
offsetFromMiddle = new PointF(-halfSize.Width, -dist);
}
break;
case 1:
if (dist > halfSize.Width)
{
dist -= halfSize.Width;
offsetFromMiddle = new PointF(halfSize.Width, halfSize.Height - dist);
}
else
{
offsetFromMiddle = new PointF(dist, halfSize.Height);
}
break;
case 2:
if (dist > halfSize.Height)
{
dist -= halfSize.Height;
offsetFromMiddle = new PointF(halfSize.Width - dist, -halfSize.Height);
}
else
{
offsetFromMiddle = new PointF(halfSize.Width, -dist);
}
break;
case 3:
if (dist > halfSize.Width)
{
dist -= halfSize.Width;
offsetFromMiddle = new PointF(-halfSize.Width, -halfSize.Height + dist);
}
else
{
offsetFromMiddle = new PointF(-dist, -halfSize.Height);
}
break;
default:
throw new NPlotException("Programmer error.");
}
g.DrawString(
text_, font_, textBrush_,
(int)(fromPoint.X - halfSize.Width - offsetFromMiddle.X),
(int)(fromPoint.Y - halfSize.Height + offsetFromMiddle.Y));
}
/// <summary>
/// Draws the horizontal 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(System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
int xMin = xAxis.PhysicalMin.X;
int xMax = xAxis.PhysicalMax.X;
xMin += pixelIndent_;
xMax -= pixelIndent_;
float length = Math.Abs(xMax - xMin);
float lengthDiff = length - length*scale_;
float indentAmount = lengthDiff/2;
xMin += (int)indentAmount;
xMax -= (int)indentAmount;
int yPos = (int)yAxis.WorldToPhysical( value_, false ).Y;
g.DrawLine( pen_, xMin, yPos ,xMax, yPos );
Brush brush=new SolidBrush(Color.SlateBlue);
g.DrawString(""+(int)value_, new Font(FontFamily.GenericSerif, 8f, FontStyle.Regular), brush, xMax-20, yPos-6);
// todo: clip and proper logic for flipped axis min max.
}
/// <summary>
/// Draws the step 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 virtual void Draw( Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
SequenceAdapter data =
new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
for (int i=0; i<data.Count; ++i)
{
PointD p1 = data[i];
if (Double.IsNaN(p1.X) || Double.IsNaN(p1.Y))
{
continue;
}
PointD p2;
PointD p3;
if (i+1 != data.Count)
{
p2 = data[i+1];
if (Double.IsNaN(p2.X) || Double.IsNaN(p2.Y))
{
continue;
}
p2.Y = p1.Y;
p3 = data[i+1];
}
else
{
// Check that we are not dealing with a DataSource of 1 point.
// This check is done here so it is only checked on the end
// condition and not for every point in the DataSource.
if (data.Count > 1)
{
p2 = data[i - 1];
}
else
{
// TODO: Once log4net is set up post a message to the user that a step-plot of 1 really does not make any sense.
p2 = p1;
}
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
p3 = p2;
}
if ( this.center_ )
{
double offset = ( p2.X - p1.X ) / 2.0f;
p1.X -= offset;
p2.X -= offset;
p3.X -= offset;
}
PointF xPos1 = xAxis.WorldToPhysical( p1.X, false );
PointF yPos1 = yAxis.WorldToPhysical( p1.Y, false );
PointF xPos2 = xAxis.WorldToPhysical( p2.X, false );
PointF yPos2 = yAxis.WorldToPhysical( p2.Y, false );
PointF xPos3 = xAxis.WorldToPhysical( p3.X, false );
PointF yPos3 = yAxis.WorldToPhysical( p3.Y, false );
// do horizontal clipping here, to speed up
if ((p1.X < leftCutoff || p1.X > rightCutoff ) &&
(p2.X < leftCutoff || p2.X > rightCutoff ) &&
(p3.X < leftCutoff || p3.X > rightCutoff ) )
{
continue;
}
if (!this.hideHorizontalSegments_)
{
if (scale_ != 1.0f)
{
float middle = (xPos2.X + xPos1.X) / 2.0f;
float width = xPos2.X - xPos1.X;
width *= this.scale_;
g.DrawLine( Pen, (int)(middle-width/2.0f), (int)yPos1.Y, (int)(middle+width/2.0f), (int)yPos2.Y );
}
else
{
g.DrawLine( Pen, (int)xPos1.X, (int)yPos1.Y, (int)xPos2.X, (int)yPos2.Y );
}
}
if (!this.hideVerticalSegments_)
{
g.DrawLine( Pen, (int)xPos2.X, (int)yPos2.Y, (int)xPos3.X, (int)yPos3.Y );
}
}
}
/// <summary>
/// Draws the vertical 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(System.Drawing.Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
int yMin = yAxis.PhysicalMin.Y;
int yMax = yAxis.PhysicalMax.Y;
yMin -= pixelIndent_;
yMax += pixelIndent_;
float length = Math.Abs(yMax - yMin);
float lengthDiff = length - length*scale_;
float indentAmount = lengthDiff/2;
yMin -= (int)indentAmount;
yMax += (int)indentAmount;
int xPos = (int)xAxis.WorldToPhysical( value_, false ).X;
g.DrawLine( pen_, xPos, yMin , xPos, yMax );
// todo: clip and proper logic for flipped axis min max.
}
