/// <summary>
/// Draws the point plot using the Drawing Context and x and y axes supplied
/// </summary>
/// <param name="ctx">The Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data_ = new SequenceAdapter(DataSource, DataMember, OrdinateData, AbscissaData);
double leftCutoff_ = xAxis.PhysicalMin.X - marker.Size;
double rightCutoff_ = xAxis.PhysicalMax.X + marker.Size;
ctx.Save();
ctx.SetColor(marker.LineColor);
ctx.SetLineWidth(marker.LineWidth);
for (int i = 0; i < data_.Count; ++i)
{
if (!Double.IsNaN(data_[i].X) && !Double.IsNaN(data_[i].Y))
{
Point xPos = xAxis.WorldToPhysical(data_[i].X, false);
if (xPos.X < leftCutoff_ || rightCutoff_ < xPos.X)
{
continue;
}
Point yPos = yAxis.WorldToPhysical(data_[i].Y, false);
marker.Draw(ctx, xPos.X, yPos.Y);
if (marker.DropLine)
{
Point yMin = new Point(data_[i].X, Math.Max(0.0, yAxis.Axis.WorldMin));
Point yStart = yAxis.WorldToPhysical(yMin.Y, false);
ctx.MoveTo(xPos.X, yStart.Y);
ctx.LineTo(xPos.X, yPos.Y);
ctx.Stroke();
}
}
}
ctx.Restore();
}
/// <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>
/// Does all the work in drawing grid lines.
/// </summary>
/// <param name="ctx">The graphics context with which to draw</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="color">the color to draw the grid lines.</param>
private void DrawGridLines(Context ctx,
PhysicalAxis axis, PhysicalAxis orthogonalAxis,
System.Collections.ArrayList a, bool horizontal)
{
for (int i = 0; i < a.Count; ++i)
{
Point p1 = axis.WorldToPhysical((double)a[i], true);
Point 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;
}
ctx.MoveTo(p1);
ctx.LineTo(p2);
}
ctx.SetLineWidth(1);
ctx.SetColor(gridColor);
ctx.SetLineDash(0, gridDash);
ctx.Stroke();
}
/// <summary>
/// Draws the horizontal line plot using the Context and the x and y axes specified
/// </summary>
/// <param name="ctx">The Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
double xMin = xAxis.PhysicalMin.X;
double xMax = xAxis.PhysicalMax.X;
xMin += pixelIndent_;
xMax -= pixelIndent_;
double length = Math.Abs(xMax - xMin);
double lengthDiff = length - length * scale_;
double indentAmount = lengthDiff / 2;
xMin += indentAmount;
xMax -= indentAmount;
double yPos = yAxis.WorldToPhysical(value_, false).Y;
ctx.Save();
ctx.SetLineWidth(1);
ctx.SetColor(color_);
ctx.MoveTo(xMin, yPos);
ctx.LineTo(xMax, yPos);
ctx.Stroke();
ctx.Restore();
// todo: clip and proper logic for flipped axis min max.
}
/// <summary>
/// Draws the vertical line using the Context and the x and y axes specified
/// </summary>
/// <param name="ctx">The Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
double yMin = yAxis.PhysicalMin.Y;
double yMax = yAxis.PhysicalMax.Y;
yMin -= PixelIndent;
yMax += PixelIndent;
double length = Math.Abs(yMax - yMin);
double lengthDiff = length - length * LengthScale;
double indentAmount = lengthDiff / 2;
yMin -= indentAmount;
yMax += indentAmount;
double xPos = xAxis.WorldToPhysical(AbscissaValue, false).X;
ctx.Save();
ctx.SetLineWidth(1);
ctx.SetColor(Color);
ctx.MoveTo(xPos, yMin);
ctx.LineTo(xPos, yMax);
ctx.Stroke();
ctx.Restore();
// todo: clip and proper logic for flipped axis min max.
}
/// <summary>
/// Draws the marker on a plot surface.
/// </summary>
/// <param name="ctx">The Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
Point point = new Point(
xAxis.WorldToPhysical(x_, true).X,
yAxis.WorldToPhysical(y_, true).Y);
marker_.Draw(ctx, point.X, point.Y);
}
/// <summary>
/// Draws the histogram.
/// </summary>
/// <param name="ctx">The Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
double yoff;
SequenceAdapter data = new SequenceAdapter (DataSource, DataMember, OrdinateData, AbscissaData);
ctx.Save ();
ctx.SetLineWidth (1);
for (int i=0; i<data.Count; ++i ) {
// (1) determine the top left hand point of the bar (assuming not centered)
Point 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)
Point p2 = Point.Zero;;
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 = 1.0;
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 = 0.0;
double yval = 0.0;
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) / 2.0;
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.
Point xPos1 = xAxis.WorldToPhysical (p1.X, false);
Point yPos1 = yAxis.WorldToPhysical (p1.Y, false);
Point xPos2 = xAxis.WorldToPhysical (p2.X, false);
if (IsStacked) {
currentPlot = this;
while (currentPlot.IsStacked) {
currentPlot = currentPlot.stackedTo;
}
baseWidth = currentPlot.baseWidth;
}
double width = xPos2.X - xPos1.X;
double height;
if (IsStacked) {
height = -yPos1.Y+yoff;
}
else {
height = -yPos1.Y+yAxis.PhysicalMin.Y;
}
double xoff = (1.0 - baseWidth)/2.0*width;
Rectangle bar = new Rectangle (xPos1.X+xoff, yPos1.Y, width-2*xoff, height);
ctx.Rectangle (bar);
if (Filled) {
if (bar.Height != 0 && bar.Width != 0) {
if (FillGradient != null) {
// Scale FillGradient to bar rectangle
double sX = bar.X + fillGradient.StartPoint.X * bar.Width;
double sY = bar.Y + fillGradient.StartPoint.Y * bar.Height;
double eX = bar.X + fillGradient.EndPoint.X * bar.Width;
double eY = bar.Y + fillGradient.EndPoint.Y * bar.Height;
LinearGradient g = new LinearGradient (sX, sY, eX, eY);
g.AddColorStop (0, FillGradient.StartColor);
g.AddColorStop (1, FillGradient.EndColor);
ctx.Pattern = g;
} else {
ctx.SetColor (FillColor);
}
ctx.FillPreserve ();
}
}
ctx.SetColor (BorderColor);
ctx.Stroke ();
}
ctx.Restore ();
}
/// <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>
/// Draws the step plot using a Drawing Context against the provided x and y axes.
/// </summary>
/// <param name="ctx">The Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
SequenceAdapter data =
new SequenceAdapter (DataSource, DataMember, OrdinateData, AbscissaData);
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
ctx.Save ();
ctx.SetColor (Color);
ctx.SetLineWidth (1);
for (int i=0; i<data.Count; ++i) {
Point p1 = data[i];
if (Double.IsNaN(p1.X) || Double.IsNaN(p1.Y)) {
continue;
}
Point p2;
Point 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 {
p2 = p1;
}
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
p3 = p2;
}
if (centre) {
double offset = ( p2.X - p1.X ) / 2.0;
p1.X -= offset;
p2.X -= offset;
p3.X -= offset;
}
Point xPos1 = xAxis.WorldToPhysical (p1.X, false);
Point yPos1 = yAxis.WorldToPhysical (p1.Y, false);
Point xPos2 = xAxis.WorldToPhysical (p2.X, false);
Point yPos2 = yAxis.WorldToPhysical (p2.Y, false);
Point xPos3 = xAxis.WorldToPhysical (p3.X, false);
Point yPos3 = yAxis.WorldToPhysical (p3.Y, false);
// do horizontal clipping here, to speed up
if ((p1.X<leftCutoff && p2.X<leftCutoff && p3.X<leftCutoff) || (p1.X>rightCutoff && p2.X>rightCutoff && p3.X>rightCutoff)) {
continue;
}
if (!this.hideHorizontalSegments) {
if (scale != 1) {
double middle = (xPos2.X + xPos1.X) / 2;
double width = xPos2.X - xPos1.X;
width *= this.scale;
ctx.MoveTo (middle-width/2, yPos1.Y);
ctx.LineTo (middle+width/2, yPos2.Y);
}
else {
ctx.MoveTo (xPos1.X, yPos1.Y);
ctx.LineTo (xPos2.X, yPos2.Y);
}
ctx.Stroke ();
}
if (!this.hideVerticalSegments) {
ctx.MoveTo (xPos2.X, yPos2.Y);
ctx.LineTo (xPos3.X, yPos3.Y);
ctx.Stroke ();
}
}
ctx.Restore ();
}
/// <summary>
/// Draw using the Drawing Context and Axes supplied
/// </summary>
/// <remarks>TODO: block positions may be off by a pixel or so. maybe. Re-think calculations</remarks>
public void Draw(Context ctx, 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 / xStep;
double worldHeight = yAxis.Axis.WorldMax - yAxis.Axis.WorldMin;
double numBlocksVertical = worldHeight / 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;
ctx.Save();
for (int i = 0; i < data.GetLength(0); ++i)
{
for (int j = 0; j < data.GetLength(1); ++j)
{
double wX = (double)j * xStep + xStart;
double wY = (double)i * yStep + yStart;
if (!hPositive)
{
wY += yStep;
}
if (!wPositive)
{
wX += xStep;
}
if (Center)
{
wX -= xStep / 2.0;
wY -= yStep / 2.0;
}
Color color = Gradient.GetColor((data[i, j] - DataMin) / (DataMax - DataMin));
ctx.SetColor(color);
double x = xAxis.WorldToPhysical(wX, false).X;
double y = yAxis.WorldToPhysical(wY, false).Y;
ctx.Rectangle(x, y, blockWidth, blockHeight);
ctx.Fill();
}
}
ctx.Restore();
}
/// <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>
/// Draws the arrow on a plot surface.
/// </summary>
/// <param name="ctx">the Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
if (To.X > xAxis.Axis.WorldMax || To.X < xAxis.Axis.WorldMin) {
return;
}
if (To.Y > yAxis.Axis.WorldMax || To.Y < yAxis.Axis.WorldMin) {
return;
}
ctx.Save ();
TextLayout layout = new TextLayout ();
layout.Font = textFont_;
layout.Text = text_;
double angle = angle_;
if (angle_ < 0.0) {
int mul = -(int)(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 (
xAxis.WorldToPhysical (to_.X, true).X,
yAxis.WorldToPhysical (to_.Y, true).Y);
double xDir = Math.Cos (normAngle * 2.0 * Math.PI / 360.0);
double yDir = Math.Sin (normAngle * 2.0 * Math.PI / 360.0);
toPoint.X += xDir*headOffset_;
toPoint.Y += yDir*headOffset_;
double xOff = physicalLength_ * xDir;
double yOff = physicalLength_ * yDir;
Point fromPoint = new Point(
(int)(toPoint.X + xOff),
(int)(toPoint.Y + yOff) );
ctx.SetLineWidth (1);
ctx.SetColor (arrowColor_);
ctx.MoveTo (fromPoint);
ctx.LineTo (toPoint);
ctx.Stroke ();
xOff = headSize_ * Math.Cos ((normAngle-headAngle_/2) * 2.0 * Math.PI / 360.0);
yOff = headSize_ * Math.Sin ((normAngle-headAngle_/2) * 2.0 * Math.PI / 360.0);
ctx.LineTo (toPoint.X + xOff, toPoint.Y + yOff);
double xOff2 = headSize_ * Math.Cos ((normAngle+headAngle_/2) * 2.0 * Math.PI / 360.0);
double yOff2 = headSize_ * Math.Sin ((normAngle+headAngle_/2) * 2.0 * Math.PI / 360.0);
ctx.LineTo (toPoint.X + xOff2, toPoint.Y + yOff2);
ctx.LineTo (toPoint);
ctx.ClosePath ();
ctx.SetColor (arrowColor_);
ctx.Fill ();
Size textSize = layout.GetSize ();
Size halfSize = new Size (textSize.Width/2, textSize.Height/2);
double quadrantSlideLength = halfSize.Width + halfSize.Height;
double quadrantD = normAngle / 90.0; // integer part gives quadrant.
int quadrant = (int)quadrantD; // quadrant in.
double prop = quadrantD - (double)quadrant; // proportion of way through this qadrant.
double 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.
Point offsetFromMiddle = new Point (0, 0);
switch (quadrant) {
case 0:
if (dist > halfSize.Height) {
dist -= halfSize.Height;
offsetFromMiddle = new Point ( -halfSize.Width + dist, halfSize.Height );
}
else {
offsetFromMiddle = new Point ( -halfSize.Width, - dist );
}
break;
case 1:
if (dist > halfSize.Width) {
dist -= halfSize.Width;
offsetFromMiddle = new Point ( halfSize.Width, halfSize.Height - dist );
}
else {
offsetFromMiddle = new Point ( dist, halfSize.Height );
}
break;
case 2:
if (dist > halfSize.Height) {
dist -= halfSize.Height;
offsetFromMiddle = new Point ( halfSize.Width - dist, -halfSize.Height );
}
else {
offsetFromMiddle = new Point ( halfSize.Width, -dist );
}
break;
case 3:
if (dist > halfSize.Width) {
dist -= halfSize.Width;
offsetFromMiddle = new Point ( -halfSize.Width, -halfSize.Height + dist );
}
else {
offsetFromMiddle = new Point ( -dist, -halfSize.Height );
}
break;
default:
throw new XwPlotException( "Programmer error." );
}
ctx.SetColor (textColor_);
double x = fromPoint.X - halfSize.Width - offsetFromMiddle.X;
double y = fromPoint.Y - halfSize.Height + offsetFromMiddle.Y;
ctx.DrawTextLayout (layout, x, y);
ctx.Restore ();
}
/// <summary>
/// Draws the arrow on a plot surface.
/// </summary>
/// <param name="ctx">the Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
if (To.X > xAxis.Axis.WorldMax || To.X < xAxis.Axis.WorldMin)
{
return;
}
if (To.Y > yAxis.Axis.WorldMax || To.Y < yAxis.Axis.WorldMin)
{
return;
}
ctx.Save();
TextLayout layout = new TextLayout();
layout.Font = textFont_;
layout.Text = text_;
double angle = angle_;
if (angle_ < 0.0)
{
int mul = -(int)(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(
xAxis.WorldToPhysical(to_.X, true).X,
yAxis.WorldToPhysical(to_.Y, true).Y);
double xDir = Math.Cos(normAngle * 2.0 * Math.PI / 360.0);
double yDir = Math.Sin(normAngle * 2.0 * Math.PI / 360.0);
toPoint.X += xDir * headOffset_;
toPoint.Y += yDir * headOffset_;
double xOff = physicalLength_ * xDir;
double yOff = physicalLength_ * yDir;
Point fromPoint = new Point(
(int)(toPoint.X + xOff),
(int)(toPoint.Y + yOff));
ctx.SetLineWidth(1);
ctx.SetColor(arrowColor_);
ctx.MoveTo(fromPoint);
ctx.LineTo(toPoint);
ctx.Stroke();
xOff = headSize_ * Math.Cos((normAngle - headAngle_ / 2) * 2.0 * Math.PI / 360.0);
yOff = headSize_ * Math.Sin((normAngle - headAngle_ / 2) * 2.0 * Math.PI / 360.0);
ctx.LineTo(toPoint.X + xOff, toPoint.Y + yOff);
double xOff2 = headSize_ * Math.Cos((normAngle + headAngle_ / 2) * 2.0 * Math.PI / 360.0);
double yOff2 = headSize_ * Math.Sin((normAngle + headAngle_ / 2) * 2.0 * Math.PI / 360.0);
ctx.LineTo(toPoint.X + xOff2, toPoint.Y + yOff2);
ctx.LineTo(toPoint);
ctx.ClosePath();
ctx.SetColor(arrowColor_);
ctx.Fill();
Size textSize = layout.GetSize();
Size halfSize = new Size(textSize.Width / 2, textSize.Height / 2);
double quadrantSlideLength = halfSize.Width + halfSize.Height;
double quadrantD = normAngle / 90.0; // integer part gives quadrant.
int quadrant = (int)quadrantD; // quadrant in.
double prop = quadrantD - (double)quadrant; // proportion of way through this qadrant.
double 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.
Point offsetFromMiddle = new Point(0, 0);
switch (quadrant)
{
case 0:
if (dist > halfSize.Height)
{
dist -= halfSize.Height;
offsetFromMiddle = new Point(-halfSize.Width + dist, halfSize.Height);
}
else
{
offsetFromMiddle = new Point(-halfSize.Width, -dist);
}
break;
case 1:
if (dist > halfSize.Width)
{
dist -= halfSize.Width;
offsetFromMiddle = new Point(halfSize.Width, halfSize.Height - dist);
}
else
{
offsetFromMiddle = new Point(dist, halfSize.Height);
}
break;
case 2:
if (dist > halfSize.Height)
{
dist -= halfSize.Height;
offsetFromMiddle = new Point(halfSize.Width - dist, -halfSize.Height);
}
else
{
offsetFromMiddle = new Point(halfSize.Width, -dist);
}
break;
case 3:
if (dist > halfSize.Width)
{
dist -= halfSize.Width;
offsetFromMiddle = new Point(-halfSize.Width, -halfSize.Height + dist);
}
else
{
offsetFromMiddle = new Point(-dist, -halfSize.Height);
}
break;
default:
throw new XwPlotException("Programmer error.");
}
ctx.SetColor(textColor_);
double x = fromPoint.X - halfSize.Width - offsetFromMiddle.X;
double y = fromPoint.Y - halfSize.Height + offsetFromMiddle.Y;
ctx.DrawTextLayout(layout, x, y);
ctx.Restore();
}
/// <summary>
/// Draws the step plot using a Drawing Context against the provided x and y axes.
/// </summary>
/// <param name="ctx">The Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data =
new SequenceAdapter(DataSource, DataMember, OrdinateData, AbscissaData);
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
ctx.Save();
ctx.SetColor(Color);
ctx.SetLineWidth(1);
for (int i = 0; i < data.Count; ++i)
{
Point p1 = data[i];
if (Double.IsNaN(p1.X) || Double.IsNaN(p1.Y))
{
continue;
}
Point p2;
Point 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
{
p2 = p1;
}
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
p3 = p2;
}
if (centre)
{
double offset = (p2.X - p1.X) / 2.0;
p1.X -= offset;
p2.X -= offset;
p3.X -= offset;
}
Point xPos1 = xAxis.WorldToPhysical(p1.X, false);
Point yPos1 = yAxis.WorldToPhysical(p1.Y, false);
Point xPos2 = xAxis.WorldToPhysical(p2.X, false);
Point yPos2 = yAxis.WorldToPhysical(p2.Y, false);
Point xPos3 = xAxis.WorldToPhysical(p3.X, false);
Point yPos3 = yAxis.WorldToPhysical(p3.Y, false);
// do horizontal clipping here, to speed up
if ((p1.X < leftCutoff && p2.X < leftCutoff && p3.X < leftCutoff) || (p1.X > rightCutoff && p2.X > rightCutoff && p3.X > rightCutoff))
{
continue;
}
if (!this.hideHorizontalSegments)
{
if (scale != 1)
{
double middle = (xPos2.X + xPos1.X) / 2;
double width = xPos2.X - xPos1.X;
width *= this.scale;
ctx.MoveTo(middle - width / 2, yPos1.Y);
ctx.LineTo(middle + width / 2, yPos2.Y);
}
else
{
ctx.MoveTo(xPos1.X, yPos1.Y);
ctx.LineTo(xPos2.X, yPos2.Y);
}
ctx.Stroke();
}
if (!this.hideVerticalSegments)
{
ctx.MoveTo(xPos2.X, yPos2.Y);
ctx.LineTo(xPos3.X, yPos3.Y);
ctx.Stroke();
}
}
ctx.Restore();
}
/// <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(xAxis_.WorldToPhysical(x, false).X, yAxis_.WorldToPhysical(y, false).Y));
}
/// <summary>
/// Draws the histogram.
/// </summary>
/// <param name="ctx">The Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
double yoff;
SequenceAdapter data = new SequenceAdapter(DataSource, DataMember, OrdinateData, AbscissaData);
ctx.Save();
ctx.SetLineWidth(1);
for (int i = 0; i < data.Count; ++i)
{
// (1) determine the top left hand point of the bar (assuming not centered)
Point 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)
Point p2 = Point.Zero;;
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 = 1.0;
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 = 0.0;
double yval = 0.0;
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) / 2.0;
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.
Point xPos1 = xAxis.WorldToPhysical(p1.X, false);
Point yPos1 = yAxis.WorldToPhysical(p1.Y, false);
Point xPos2 = xAxis.WorldToPhysical(p2.X, false);
if (IsStacked)
{
currentPlot = this;
while (currentPlot.IsStacked)
{
currentPlot = currentPlot.stackedTo;
}
baseWidth = currentPlot.baseWidth;
}
double width = xPos2.X - xPos1.X;
double height;
if (IsStacked)
{
height = -yPos1.Y + yoff;
}
else
{
height = -yPos1.Y + yAxis.PhysicalMin.Y;
}
double xoff = (1.0 - baseWidth) / 2.0 * width;
Rectangle bar = new Rectangle(xPos1.X + xoff, yPos1.Y, width - 2 * xoff, height);
ctx.Rectangle(bar);
if (Filled)
{
if (bar.Height != 0 && bar.Width != 0)
{
if (FillGradient != null)
{
// Scale FillGradient to bar rectangle
double sX = bar.X + fillGradient.StartPoint.X * bar.Width;
double sY = bar.Y + fillGradient.StartPoint.Y * bar.Height;
double eX = bar.X + fillGradient.EndPoint.X * bar.Width;
double eY = bar.Y + fillGradient.EndPoint.Y * bar.Height;
LinearGradient g = new LinearGradient(sX, sY, eX, eY);
g.AddColorStop(0, FillGradient.StartColor);
g.AddColorStop(1, FillGradient.EndColor);
ctx.Pattern = g;
}
else
{
ctx.SetColor(FillColor);
}
ctx.FillPreserve();
}
}
ctx.SetColor(BorderColor);
ctx.Stroke();
}
ctx.Restore();
}
/// <summary>
/// Draws the plot using the Drawing Context and X, Y axes supplied.
/// </summary>
public override void Draw(Context ctx, 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);
TextLayout layout = new TextLayout ();
layout.Font = Font;
ctx.Save ();
ctx.SetColor (Colors.Black);
for (int i=0; i<data.Count; ++i) {
try {
Point p = data[i];
if (!Double.IsNaN(p.X) && !Double.IsNaN(p.Y)) {
Point xPos = xAxis.WorldToPhysical (p.X, false);
Point yPos = yAxis.WorldToPhysical (p.Y, false);
// first plot the marker
Marker.Draw (ctx, xPos.X, yPos.Y);
// then the label
if (textData[i] != "") {
layout.Text = textData[i];
Size size = layout.GetSize ();
switch (labelTextPosition) {
case LabelPositions.Above:
p.X = xPos.X-size.Width/2;
p.Y = yPos.Y-size.Height-Marker.Size*2/3;
break;
case LabelPositions.Below:
p.X = xPos.X-size.Width/2;
p.Y = yPos.Y+Marker.Size*2/3;
break;
case LabelPositions.Left:
p.X = xPos.X-size.Width-Marker.Size*2/3;
p.Y = yPos.Y-size.Height/2;
break;
case LabelPositions.Right:
p.X = xPos.X+Marker.Size*2/3;
p.Y = yPos.Y-size.Height/2;
break;
}
ctx.DrawTextLayout (layout, p);
}
}
}
catch {
throw new XwPlotException ("Error in TextPlot.Draw");
}
}
ctx.Restore ();
}
/// <summary>
/// Draws the plot using the Drawing Context and X, Y axes supplied.
/// </summary>
public override void Draw(Context ctx, 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);
TextLayout layout = new TextLayout();
layout.Font = Font;
ctx.Save();
ctx.SetColor(Colors.Black);
for (int i = 0; i < data.Count; ++i)
{
try {
Point p = data[i];
if (!Double.IsNaN(p.X) && !Double.IsNaN(p.Y))
{
Point xPos = xAxis.WorldToPhysical(p.X, false);
Point yPos = yAxis.WorldToPhysical(p.Y, false);
// first plot the marker
Marker.Draw(ctx, xPos.X, yPos.Y);
// then the label
if (textData[i] != "")
{
layout.Text = textData[i];
Size size = layout.GetSize();
switch (labelTextPosition)
{
case LabelPositions.Above:
p.X = xPos.X - size.Width / 2;
p.Y = yPos.Y - size.Height - Marker.Size * 2 / 3;
break;
case LabelPositions.Below:
p.X = xPos.X - size.Width / 2;
p.Y = yPos.Y + Marker.Size * 2 / 3;
break;
case LabelPositions.Left:
p.X = xPos.X - size.Width - Marker.Size * 2 / 3;
p.Y = yPos.Y - size.Height / 2;
break;
case LabelPositions.Right:
p.X = xPos.X + Marker.Size * 2 / 3;
p.Y = yPos.Y - size.Height / 2;
break;
}
ctx.DrawTextLayout(layout, p);
}
}
}
catch {
throw new XwPlotException("Error in TextPlot.Draw");
}
}
ctx.Restore();
}
/// <summary>
/// Does all the work in drawing grid lines.
/// </summary>
/// <param name="ctx">The graphics context with which to draw</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="color">the color to draw the grid lines.</param>
private void DrawGridLines(Context ctx,
PhysicalAxis axis, PhysicalAxis orthogonalAxis,
System.Collections.ArrayList a, bool horizontal)
{
for (int i=0; i<a.Count; ++i) {
Point p1 = axis.WorldToPhysical ((double)a[i], true);
Point 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;
}
ctx.MoveTo (p1);
ctx.LineTo (p2);
}
ctx.SetLineWidth (1);
ctx.SetColor (gridColor);
ctx.SetLineDash (0, gridDash);
ctx.Stroke ();
}
/// <summary>
/// Draws the marker on a plot surface.
/// </summary>
/// <param name="ctx">The Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
Point point = new Point (
xAxis.WorldToPhysical (x_, true).X,
yAxis.WorldToPhysical (y_, true ).Y);
marker_.Draw (ctx, point.X, point.Y );
}
/// <summary>
/// Draw using the Drawing Context and Axes supplied
/// </summary>
/// <remarks>TODO: block positions may be off by a pixel or so. maybe. Re-think calculations</remarks>
public void Draw(Context ctx, 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 / xStep;
double worldHeight = yAxis.Axis.WorldMax - yAxis.Axis.WorldMin;
double numBlocksVertical = worldHeight / 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;
ctx.Save ();
for (int i=0; i<data.GetLength(0); ++i) {
for (int j=0; j<data.GetLength(1); ++j) {
double wX = (double)j*xStep + xStart;
double wY = (double)i*yStep + yStart;
if (!hPositive) {
wY += yStep;
}
if (!wPositive ) {
wX += xStep;
}
if (Center) {
wX -= xStep/2.0;
wY -= yStep/2.0;
}
Color color = Gradient.GetColor ((data[i,j]-DataMin)/(DataMax-DataMin));
ctx.SetColor (color);
double x = xAxis.WorldToPhysical(wX,false).X;
double y = yAxis.WorldToPhysical(wY,false).Y;
ctx.Rectangle (x, y, blockWidth, blockHeight);
ctx.Fill ();
}
}
ctx.Restore ();
}
/// <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>
/// Draws the point plot using the Drawing Context and x and y axes supplied
/// </summary>
/// <param name="ctx">The Drawing Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data_ = new SequenceAdapter (DataSource, DataMember, OrdinateData, AbscissaData );
double leftCutoff_ = xAxis.PhysicalMin.X - marker.Size;
double rightCutoff_ = xAxis.PhysicalMax.X + marker.Size;
ctx.Save ();
ctx.SetColor (marker.LineColor);
ctx.SetLineWidth (marker.LineWidth);
for (int i=0; i<data_.Count; ++i) {
if (!Double.IsNaN(data_[i].X) && !Double.IsNaN(data_[i].Y)) {
Point xPos = xAxis.WorldToPhysical (data_[i].X, false);
if (xPos.X < leftCutoff_ || rightCutoff_ < xPos.X) {
continue;
}
Point yPos = yAxis.WorldToPhysical (data_[i].Y, false);
marker.Draw (ctx, xPos.X, yPos.Y);
if (marker.DropLine) {
Point yMin = new Point (data_[i].X, Math.Max (0.0, yAxis.Axis.WorldMin));
Point yStart = yAxis.WorldToPhysical (yMin.Y, false);
ctx.MoveTo (xPos.X, yStart.Y);
ctx.LineTo (xPos.X, yPos.Y);
ctx.Stroke ();
}
}
}
ctx.Restore ();
}
/// <summary>
/// Draws the horizontal line plot using the Context and the x and y axes specified
/// </summary>
/// <param name="ctx">The Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
double xMin = xAxis.PhysicalMin.X;
double xMax = xAxis.PhysicalMax.X;
xMin += pixelIndent_;
xMax -= pixelIndent_;
double length = Math.Abs (xMax - xMin);
double lengthDiff = length - length*scale_;
double indentAmount = lengthDiff/2;
xMin += indentAmount;
xMax -= indentAmount;
double yPos = yAxis.WorldToPhysical (value_, false).Y;
ctx.Save ();
ctx.SetLineWidth (1);
ctx.SetColor (color_);
ctx.MoveTo (xMin, yPos);
ctx.LineTo (xMax, yPos);
ctx.Stroke ();
ctx.Restore ();
// todo: clip and proper logic for flipped axis min max.
}
/// <summary>
/// Draws the vertical line using the Context and the x and y axes specified
/// </summary>
/// <param name="ctx">The Context with 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(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
double yMin = yAxis.PhysicalMin.Y;
double yMax = yAxis.PhysicalMax.Y;
yMin -= PixelIndent;
yMax += PixelIndent;
double length = Math.Abs (yMax - yMin);
double lengthDiff = length - length*LengthScale;
double indentAmount = lengthDiff/2;
yMin -= indentAmount;
yMax += indentAmount;
double xPos = xAxis.WorldToPhysical (AbscissaValue, false).X;
ctx.Save ();
ctx.SetLineWidth (1);
ctx.SetColor (Color);
ctx.MoveTo (xPos, yMin);
ctx.LineTo (xPos, yMax);
ctx.Stroke ();
ctx.Restore ();
// todo: clip and proper logic for flipped axis min max.
}
