/// <summary>
/// Draws the line plot on a GDI+ surface against the provided x and y axes.
/// </summary>
/// <param name="g">The GDI+ surface on which to draw.</param>
/// <param name="xAxis">The X-Axis to draw against.</param>
/// <param name="yAxis">The Y-Axis to draw against.</param>
public void Draw(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter dataTop =
new SequenceAdapter(DataSource, DataMember, OrdinateDataTop, AbscissaData);
SequenceAdapter dataBottom =
new SequenceAdapter(DataSource, DataMember, OrdinateDataBottom, AbscissaData);
ITransform2D t = Transform2D.GetTransformer(xAxis, yAxis);
for (int i = 0; i < dataTop.Count; ++i)
{
PointF physicalBottom = t.Transform(dataBottom[i]);
PointF physicalTop = t.Transform(dataTop[i]);
if (physicalBottom != physicalTop)
{
Rectangle r = new Rectangle((int)(physicalBottom.X - BarWidth / 2), (int)physicalTop.Y,
(int)BarWidth, (int)(physicalBottom.Y - physicalTop.Y));
g.FillRectangle(rectangleBrush_.Get(r), r);
g.DrawRectangle(borderPen_, r);
}
}
}
/// <summary>
/// Draw the filled region
/// </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)
{
ITransform2D t = Transform2D.GetTransformer(xAxis, yAxis);
Brush b = brush_;
if (b == null)
{
b = areaBrush_.Get(new Rectangle(xAxis.PhysicalMin.X, yAxis.PhysicalMax.Y, xAxis.PhysicalLength, yAxis.PhysicalLength));
}
if (hl1_ != null && hl2_ != null)
{
PointF[] points = new PointF[4];
points[0] = t.Transform(xAxis.Axis.WorldMin, hl1_.OrdinateValue);
points[1] = t.Transform(xAxis.Axis.WorldMax, hl1_.OrdinateValue);
points[2] = t.Transform(xAxis.Axis.WorldMax, hl2_.OrdinateValue);
points[3] = t.Transform(xAxis.Axis.WorldMin, hl2_.OrdinateValue);
g.FillPolygon(b, points);
}
else if (vl1_ != null && vl2_ != null)
{
PointF[] points = new PointF[4];
points[0] = t.Transform(vl1_.AbscissaValue, yAxis.Axis.WorldMin);
points[1] = t.Transform(vl1_.AbscissaValue, yAxis.Axis.WorldMax);
points[2] = t.Transform(vl2_.AbscissaValue, yAxis.Axis.WorldMax);
points[3] = t.Transform(vl2_.AbscissaValue, yAxis.Axis.WorldMin);
g.FillPolygon(b, points);
}
else if (lp1_ != null && lp2_ != null)
{
SequenceAdapter a1 = new SequenceAdapter(lp1_.DataSource, lp1_.DataMember, lp1_.OrdinateData, lp1_.AbscissaData);
SequenceAdapter a2 = new SequenceAdapter(lp2_.DataSource, lp2_.DataMember, lp2_.OrdinateData, lp2_.AbscissaData);
int count = a1.Count + a2.Count;
PointF[] points = new PointF[count];
for (int i = 0; i < a1.Count; ++i)
{
points[i] = t.Transform(a1[i]);
}
for (int i = 0; i < a2.Count; ++i)
{
points[i + a1.Count] = t.Transform(a2[a2.Count - i - 1]);
}
g.FillPolygon(b, points);
}
else
{
throw new NPlotException("One of bounds was set to null");
}
}
/// <summary>
/// Draws the line plot on a GDI+ surface against the provided x and y axes.
/// </summary>
/// <param name="g">The GDI+ surface on which to draw.</param>
/// <param name="xAxis">The X-Axis to draw against.</param>
/// <param name="yAxis">The Y-Axis to draw against.</param>
/// <param name="drawShadow">If true draw the shadow for the line. If false, draw line.</param>
public void DrawLineOrShadow(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis, bool drawShadow)
{
Pen shadowPen = null;
if (drawShadow)
{
shadowPen = (Pen)this.Pen.Clone();
shadowPen.Color = this.ShadowColor;
}
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
ITransform2D t = Transform2D.GetTransformer(xAxis, yAxis);
int numberPoints = data.Count;
if (data.Count == 0)
{
return;
}
// clipping is now handled assigning a clip region in the
// graphic object before this call
if (numberPoints == 1)
{
PointF physical = t.Transform(data[0]);
if (drawShadow)
{
g.DrawLine(shadowPen,
physical.X - 0.5f + this.ShadowOffset.X,
physical.Y + this.ShadowOffset.Y,
physical.X + 0.5f + this.ShadowOffset.X,
physical.Y + this.ShadowOffset.Y);
}
else
{
g.DrawLine(Pen, physical.X - 0.5f, physical.Y, physical.X + 0.5f, physical.Y);
}
}
else
{
// prepare for clipping
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
if (leftCutoff > rightCutoff)
{
Utils.Swap(ref leftCutoff, ref rightCutoff);
}
if (drawShadow)
{
// correct cut-offs
double shadowCorrection =
xAxis.PhysicalToWorld(ShadowOffset, false) - xAxis.PhysicalToWorld(new Point(0, 0), false);
leftCutoff -= shadowCorrection;
rightCutoff -= shadowCorrection;
}
for (int i = 1; i < numberPoints; ++i)
{
// check to see if any values null. If so, then continue.
double dx1 = data[i - 1].X;
double dx2 = data[i].X;
double dy1 = data[i - 1].Y;
double dy2 = data[i].Y;
if (Double.IsNaN(dx1) || Double.IsNaN(dy1) ||
Double.IsNaN(dx2) || Double.IsNaN(dy2))
{
continue;
}
// do horizontal clipping here, to speed up
if ((dx1 < leftCutoff && dx2 < leftCutoff) ||
(rightCutoff < dx1 && rightCutoff < dx2))
{
continue;
}
// else draw line.
PointF p1 = t.Transform(data[i - 1]);
PointF p2 = t.Transform(data[i]);
// when very far zoomed in, points can fall ontop of each other,
// and g.DrawLine throws an overflow exception
if (p1.Equals(p2))
{
continue;
}
if (drawShadow)
{
g.DrawLine(shadowPen,
p1.X + ShadowOffset.X,
p1.Y + ShadowOffset.Y,
p2.X + ShadowOffset.X,
p2.Y + ShadowOffset.Y);
}
else
{
g.DrawLine(Pen, p1.X, p1.Y, p2.X, p2.Y);
}
}
}
}
/// <summary>
/// Draws the line plot on a GDI+ surface against the provided x and y axes.
/// </summary>
/// <param name="g">The GDI+ surface on which to draw.</param>
/// <param name="xAxis">The X-Axis to draw against.</param>
/// <param name="yAxis">The Y-Axis to draw against.</param>
/// <param name="drawShadow">If true draw the shadow for the line. If false, draw line.</param>
public void DrawLineOrShadow(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis, bool drawShadow)
{
Pen shadowPen = null;
if (drawShadow)
{
shadowPen = (Pen)this.Pen.Clone();
shadowPen.Color = this.ShadowColor;
}
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
int numberPoints = data.Count;
if (data.Count == 0)
{
return;
}
// clipping is now handled assigning a clip region in the
// graphic object before this call
if (numberPoints == 1)
{
PointF physical = Transform2D.GetTransformer(xAxis, yAxis).Transform(data[0]);
if (drawShadow)
{
g.DrawLine(shadowPen,
physical.X - 0.5f + this.ShadowOffset.X,
physical.Y + this.ShadowOffset.Y,
physical.X + 0.5f + this.ShadowOffset.X,
physical.Y + this.ShadowOffset.Y);
}
else
{
g.DrawLine(Pen, physical.X - 0.5f, physical.Y, physical.X + 0.5f, physical.Y);
}
}
else
{
// prepare for clipping
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
if (leftCutoff > rightCutoff)
{
double temp = leftCutoff;
leftCutoff = rightCutoff;
rightCutoff = temp;
}
if (drawShadow)
{
// correct cut-offs
double shadowCorrection =
xAxis.PhysicalToWorld(ShadowOffset, false) - xAxis.PhysicalToWorld(new Point(0, 0), false);
leftCutoff -= shadowCorrection;
rightCutoff -= shadowCorrection;
}
// determine which points to plot
double tradingTimeOffset = 0;
List <PointD> plotPoints = new List <PointD>(numberPoints);
PointD d1 = data[0];
PointD d2 = d1;
if ((d1.X >= leftCutoff) && (d1.X <= rightCutoff))
{
plotPoints.Add(d1);
}
DateTime prevTime = (DateTime)((System.Data.DataTable) this.DataSource).Rows[0][(string)this.AbscissaData];
for (int i = 1; i < numberPoints; ++i)
{
// check to see if any values null. If so, then continue.
d1 = d2;
d2 = data[i];
if (Double.IsNaN(d1.X) || Double.IsNaN(d1.Y) ||
Double.IsNaN(d2.X) || Double.IsNaN(d2.Y))
{
continue;
}
// Get the X axis offset to strip out the non-trading time
d1.X -= tradingTimeOffset;
DateTime nextTime = (DateTime)((System.Data.DataTable) this.DataSource).Rows[i][(string)this.AbscissaData];
if (nextTime.TimeOfDay < prevTime.TimeOfDay)
{
tradingTimeOffset += (double)(nextTime - prevTime).Ticks;
}
prevTime = nextTime;
d2.X -= tradingTimeOffset;
// do horizontal clipping here, to speed up
if ((d1.X < leftCutoff && d2.X < leftCutoff) ||
(rightCutoff < d1.X && rightCutoff < d2.X))
{
continue;
}
// Add a point to plot
plotPoints.Add(d2);
}
// create a transform, which takes into account the skipped time
PhysicalAxis shunkAxis = new PhysicalAxis(new DateTimeAxis(xAxis.Axis.WorldMin, xAxis.Axis.WorldMax - tradingTimeOffset), xAxis.PhysicalMin, xAxis.PhysicalMax);
ITransform2D t = Transform2D.GetTransformer(shunkAxis, yAxis);
// plot those points
for (int i = 1; i < plotPoints.Count; i++)
{
// else draw line.
PointF p1 = t.Transform(plotPoints[i - 1]);
PointF p2 = t.Transform(plotPoints[i]);
// when very far zoomed in, points can fall ontop of each other,
// and g.DrawLine throws an overflow exception
if (p1.Equals(p2))
{
continue;
}
if (drawShadow)
{
g.DrawLine(shadowPen,
p1.X + ShadowOffset.X,
p1.Y + ShadowOffset.Y,
p2.X + ShadowOffset.X,
p2.Y + ShadowOffset.Y);
}
else
{
g.DrawLine(Pen, p1.X, p1.Y, p2.X, p2.Y);
}
}
}
}