/// <summary>
/// Returns a y-axis that is suitable for drawing this plot.
/// </summary>
/// <returns>A suitable y-axis.</returns>
public Axis SuggestYAxis()
{
CandleDataAdapter candleData = new CandleDataAdapter(this.DataSource, this.DataMember,
this.AbscissaData, this.OpenData, this.LowData, this.HighData, this.CloseData);
return(candleData.SuggestYAxis());
}
/// <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>
/// Returns a y-axis that is suitable for drawing this plot.
/// </summary>
/// <returns>A suitable y-axis.</returns>
public Axis SuggestYAxis()
{
CandleDataAdapter candleData = new CandleDataAdapter(DataSource, DataMember,
AbscissaData, OpenData, LowData, HighData, CloseData);
return(candleData.SuggestYAxis());
}
/// <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, xPos + offset, yPos1, xPos + offset, yPos2);
g.DrawLine(p, xPos - addAmount + offset, yPos3, xPos + offset, yPos3);
g.DrawLine(p, xPos + offset, yPos4, xPos + addAmount + offset, yPos4);
}
else if (this.Style == Styles.Filled)
{
g.DrawLine(p, xPos + offset, yPos1, xPos + offset, yPos2);
if (yPos3 > yPos4)
{
g.FillRectangle(bullishBrush, xPos - addAmount + offset, yPos4, stickWidth, yPos3 - yPos4);
g.DrawRectangle(p, xPos - addAmount + offset, yPos4, stickWidth, yPos3 - yPos4);
}
else if (yPos3 < yPos4)
{
g.FillRectangle(bearishBrush, xPos - addAmount + offset, yPos3, stickWidth, yPos4 - yPos3);
g.DrawRectangle(p, xPos - addAmount + offset, yPos3, stickWidth, yPos4 - yPos3);
}
else
{
g.DrawLine(p, xPos - addAmount + offset, yPos3, xPos - addAmount + stickWidth + offset, yPos3);
}
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="d"></param>
/// <returns></returns>
public override CandleStyle Create(CandleDataAdapter d)
{
return(new Stick());
}
/// <summary> /// /// </summary> /// <param name="d"></param> /// <returns></returns> public abstract CandleStyle Create(CandleDataAdapter d);
/// <summary>
///
/// </summary>
/// <param name="d"></param>
/// <returns></returns>
public override CandleStyle Create(CandleDataAdapter d)
{
return new Stick ();
}
/// <summary> /// /// </summary> /// <param name="d"></param> /// <returns></returns> public abstract CandleStyle Create(CandleDataAdapter d);
/// <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 double CalculatePhysicalSeparation(CandleDataAdapter cd, PhysicalAxis xAxis)
{
if (cd.Count > 1) {
double xPos1 = (xAxis.WorldToPhysical( ((PointOLHC)cd[0]).X, false )).X;
double xPos2 = (xAxis.WorldToPhysical( ((PointOLHC)cd[1]).X, false )).X;
double minDist = xPos2 - xPos1;
if (cd.Count > 2) { // to be pretty sure we get the smallest gap.
double xPos3 = (xAxis.WorldToPhysical(((PointOLHC)cd[2]).X, false)).X;
if (xPos3 - xPos2 < minDist) {
minDist = xPos3 - xPos2;
}
if (cd.Count > 3) {
double xPos4 = (xAxis.WorldToPhysical(((PointOLHC)cd[3]).X, false)).X;
if (xPos4 - xPos3 < minDist) {
minDist = xPos4 - xPos3;
}
}
}
return minDist;
}
return 0;
}
/// <summary>
/// Returns a Y-axis that is suitable for drawing this plot.
/// </summary>
public Axis SuggestYAxis()
{
CandleDataAdapter candleData = new CandleDataAdapter (DataSource, DataMember,
AbscissaData, OpenData, LowData, HighData, CloseData);
return candleData.SuggestYAxis ();
}
/// <summary>
/// Draws the candle plot with the specified Drawing Context and X,Y axes
/// </summary>
/// <param name="ctx">The Drawing Context with which to draw</param>
/// <param name="xAxis">The physical X-Axis to draw against</param>
/// <param name="yAxis">The physical Y-Axis to draw against</param>
public void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
CandleDataAdapter cd = new CandleDataAdapter (DataSource, DataMember,
AbscissaData, OpenData, LowData, HighData, CloseData);
double offset = 0;
if (Centered) {
offset = CalculatePhysicalSeparation (cd,xAxis)/2;
}
double addAmount = StickWidth/2;
double stickWidth = StickWidth;
if (StickWidth == AutoScaleStickWidth) {
// default
addAmount = 2;
stickWidth = 4;
double minDist = CalculatePhysicalSeparation (cd, xAxis);
addAmount = minDist / 3;
stickWidth = addAmount * 2;
}
ctx.Save ();
ctx.SetLineWidth (1);
/*
// brant hyatt proposed.
if (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))) {
double xPos = (xAxis.WorldToPhysical (point.X, false)).X;
if (xPos + offset + addAmount < xAxis.PhysicalMin.X || xAxis.PhysicalMax.X < xPos + offset - addAmount) {
continue;
}
double yLo = (yAxis.WorldToPhysical (point.Low, false)).Y;
double yHi = (yAxis.WorldToPhysical (point.High, false)).Y;
double yOpn = (yAxis.WorldToPhysical (point.Open, false)).Y;
double yCls = (yAxis.WorldToPhysical (point.Close,false)).Y;
if (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;
}
}
*/
ctx.SetColor (Color);
ctx.MoveTo (xPos+offset, yLo);
ctx.LineTo (xPos+offset, yHi); // Low to High line
ctx.MoveTo (xPos-addAmount+offset, yOpn);
ctx.LineTo (xPos+offset, yOpn); // Open line
ctx.MoveTo (xPos+addAmount+offset, yCls);
ctx.LineTo (xPos+offset, yCls); // Close line
ctx.Stroke ();
}
else if (Style == Styles.Filled) {
ctx.MoveTo (xPos+offset, yLo);
ctx.LineTo (xPos+offset, yHi);
ctx.Stroke ();
if (yOpn > yCls) {
ctx.SetColor (BullishColor);
ctx.Rectangle (xPos-addAmount+offset, yCls, stickWidth, yOpn - yCls);
ctx.FillPreserve ();
ctx.SetColor (Color);
ctx.Stroke ();
}
else if (yOpn < yCls) {
ctx.SetColor (BearishColor);
ctx.Rectangle (xPos-addAmount+offset, yOpn, stickWidth, yCls - yOpn);
ctx.FillPreserve ();
ctx.SetColor (Color);
ctx.Stroke ();
}
else { // Cls == Opn
ctx.MoveTo (xPos-addAmount+offset, yOpn);
ctx.LineTo (xPos-addAmount+stickWidth+offset, yCls);
ctx.Stroke ();
}
}
}
}
ctx.Restore ();
}
/// <summary>
/// Returns a y-axis that is suitable for drawing this plot.
/// </summary>
/// <returns>A suitable y-axis.</returns>
public Axis SuggestYAxis()
{
CandleDataAdapter candleData = new CandleDataAdapter( this.DataSource, this.DataMember,
this.AbscissaData, this.OpenData, this.LowData, this.HighData, this.CloseData );
return candleData.SuggestYAxis();
}
/// <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, xPos+offset, yPos1, xPos+offset, yPos2 );
g.DrawLine( p, xPos-addAmount+offset, yPos3, xPos+offset, yPos3 );
g.DrawLine( p, xPos+offset, yPos4, xPos+addAmount+offset, yPos4 );
}
else if (this.Style == Styles.Filled)
{
g.DrawLine( p, xPos+offset, yPos1, xPos+offset, yPos2 );
if (yPos3 > yPos4)
{
g.FillRectangle( bullishBrush, xPos-addAmount+offset, yPos4, stickWidth, yPos3 - yPos4 );
g.DrawRectangle( p, xPos-addAmount+offset, yPos4, stickWidth, yPos3 - yPos4 );
}
else if (yPos3 < yPos4)
{
g.FillRectangle( bearishBrush, xPos-addAmount+offset, yPos3, stickWidth, yPos4 - yPos3 );
g.DrawRectangle( p, xPos-addAmount+offset, yPos3, stickWidth, yPos4 - yPos3 );
}
else
{
g.DrawLine( p, xPos-addAmount+offset, yPos3, xPos-addAmount+stickWidth+offset, yPos3 );
}
}
}
}
}
/// <summary>
/// Draws the candle plot with the specified Drawing Context and X,Y axes
/// </summary>
/// <param name="ctx">The Drawing Context with which to draw</param>
/// <param name="xAxis">The physical X-Axis to draw against</param>
/// <param name="yAxis">The physical Y-Axis to draw against</param>
public void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
CandleDataAdapter cd = new CandleDataAdapter(DataSource, DataMember,
AbscissaData, OpenData, LowData, HighData, CloseData);
double offset = 0;
if (Centered)
{
offset = CalculatePhysicalSeparation(cd, xAxis) / 2;
}
double addAmount = StickWidth / 2;
double stickWidth = StickWidth;
if (StickWidth == AutoScaleStickWidth)
{
// default
addAmount = 2;
stickWidth = 4;
double minDist = CalculatePhysicalSeparation(cd, xAxis);
addAmount = minDist / 3;
stickWidth = addAmount * 2;
}
ctx.Save();
ctx.SetLineWidth(1);
/*
* // brant hyatt proposed.
* if (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)))
{
double xPos = (xAxis.WorldToPhysical(point.X, false)).X;
if (xPos + offset + addAmount < xAxis.PhysicalMin.X || xAxis.PhysicalMax.X < xPos + offset - addAmount)
{
continue;
}
double yLo = (yAxis.WorldToPhysical(point.Low, false)).Y;
double yHi = (yAxis.WorldToPhysical(point.High, false)).Y;
double yOpn = (yAxis.WorldToPhysical(point.Open, false)).Y;
double yCls = (yAxis.WorldToPhysical(point.Close, false)).Y;
if (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;
* }
* }
*/
ctx.SetColor(Color);
ctx.MoveTo(xPos + offset, yLo);
ctx.LineTo(xPos + offset, yHi); // Low to High line
ctx.MoveTo(xPos - addAmount + offset, yOpn);
ctx.LineTo(xPos + offset, yOpn); // Open line
ctx.MoveTo(xPos + addAmount + offset, yCls);
ctx.LineTo(xPos + offset, yCls); // Close line
ctx.Stroke();
}
else if (Style == Styles.Filled)
{
ctx.MoveTo(xPos + offset, yLo);
ctx.LineTo(xPos + offset, yHi);
ctx.Stroke();
if (yOpn > yCls)
{
ctx.SetColor(BullishColor);
ctx.Rectangle(xPos - addAmount + offset, yCls, stickWidth, yOpn - yCls);
ctx.FillPreserve();
ctx.SetColor(Color);
ctx.Stroke();
}
else if (yOpn < yCls)
{
ctx.SetColor(BearishColor);
ctx.Rectangle(xPos - addAmount + offset, yOpn, stickWidth, yCls - yOpn);
ctx.FillPreserve();
ctx.SetColor(Color);
ctx.Stroke();
}
else // Cls == Opn
{
ctx.MoveTo(xPos - addAmount + offset, yOpn);
ctx.LineTo(xPos - addAmount + stickWidth + offset, yCls);
ctx.Stroke();
}
}
}
}
ctx.Restore();
}
