/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func<int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
if (range.Length < 2)
return;
int lastIdx;
int numberOfPointsPerOriginalPoint;
PointF[] stepPolylinePoints = GetStepPolylinePoints(allLinePoints, range, layer, connectCircular, out numberOfPointsPerOriginalPoint, out lastIdx);
GraphicsPath gp = new GraphicsPath();
if (null != symbolGap)
{
int end = range.UpperBound - 1;
var subPointsLength = skipFrequency * numberOfPointsPerOriginalPoint + 1;
for (int i = 0; i < range.Length; i += skipFrequency)
{
int partialPolylineLength = Math.Min(subPointsLength, stepPolylinePoints.Length - numberOfPointsPerOriginalPoint * i);
if (partialPolylineLength < 2)
continue; // happens probably at the end of the range if there are not enough points to draw
double gapAtStart = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i));
double gapAtEnd;
if (connectCircular && skipFrequency >= (range.Length - i))
gapAtEnd = symbolGap(range.OriginalFirstPoint);
else if (skipFrequency <= (range.Length - 1 - i))
gapAtEnd = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i + skipFrequency));
else
gapAtEnd = 0;
int startOfPartialPolyline = numberOfPointsPerOriginalPoint * i;
var shortenedPolyline = stepPolylinePoints.ShortenPartialPolylineByDistanceFromStartAndEnd(startOfPartialPolyline, startOfPartialPolyline + partialPolylineLength - 1, gapAtStart / 2, gapAtEnd / 2);
if (null != shortenedPolyline)
g.DrawLines(linePen, shortenedPolyline);
}
}
else
{
if (connectCircular)
g.DrawPolygon(linePen, stepPolylinePoints);
else
g.DrawLines(linePen, stepPolylinePoints);
}
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="pen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, the line is connected circular, and the area is the polygon inside of that circular connection.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public abstract void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX pen,
Func <int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle
);
/// <summary> /// Template to make a line draw. /// </summary> /// <param name="g">Graphics context.</param> /// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param> /// <param name="range">The plot range to use.</param> /// <param name="layer">Graphics layer.</param> /// <param name="pen">The pen to draw the line.</param> /// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index. /// This function is null if no symbol gap is required.</param> /// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param> /// <param name="connectCircular">If true, the line is connected circular, and the area is the polygon inside of that circular connection.</param> /// <param name="linePlotStyle">The line plot style.</param> public abstract void PaintOneRange( Graphics g, PointF[] allLinePoints, IPlotRange range, IPlotArea layer, PenX pen, Func<int, double> symbolGap, int skipFrequency, bool connectCircular, LinePlotStyle linePlotStyle );
public XYPlotLineStyleController(LinePlotStyle doc)
{
if (doc == null)
{
throw new ArgumentNullException("doc is null");
}
if (!InitializeDocument(doc))
{
throw new ApplicationException("Programming error");
}
}
private void cmdOK_Click(object sender, EventArgs e)
{
if (cboScale.SelectedIndex > -1)
{
color = pictureBoxColor.BackColor;
scale = double.Parse(cboScale.Items[cboScale.SelectedIndex].ToString());
plotStyle = (LinePlotStyle)cboPlotStyle.SelectedIndex;
dashStyle = (System.Drawing.Drawing2D.DashStyle)cboDashStyle.SelectedIndex;
DialogResult = DialogResult.OK;
Close();
}
}
public static G2DPlotStyleCollection PlotStyle_LineArea(Altaxo.Main.Properties.IReadOnlyPropertyBag context)
{
var result = new G2DPlotStyleCollection();
var ps1 = new LinePlotStyle(context);
var ps2 = new DropAreaPlotStyle(context)
{
FillDirection = Graph.CSPlaneID.Bottom
};
result.Add(ps1);
result.Add(ps2);
return(result);
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func <int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
if (range.Length <= 1)
{
return; // seems to be only a single point, thus no connection possible
}
PointF[] stepPolylinePoints = GetStepPolylinePoints(allLinePoints, range, layer, connectCircular, out var numberOfPointsPerOriginalPoint, out var lastIdx);
if (null != symbolGap)
{
foreach (var segmentRange in GetSegmentRanges(range, symbolGap, skipFrequency, connectCircular))
{
if (segmentRange.IsFullRangeClosedCurve) // test if this is a closed polygon without any gaps -> draw a closed polygon and return
{
// use the whole circular arry to draw a closed polygon without any gaps
g.DrawPolygon(linePen, stepPolylinePoints);
}
else
{
int plotIndexAtStart = segmentRange.IndexAtSubRangeStart * numberOfPointsPerOriginalPoint;
int plotIndexAtEnd = segmentRange.IndexAtSubRangeEnd * numberOfPointsPerOriginalPoint;
var shortenedPolyline = stepPolylinePoints.ShortenPartialPolylineByDistanceFromStartAndEnd(plotIndexAtStart, plotIndexAtEnd, segmentRange.GapAtSubRangeStart / 2, segmentRange.GapAtSubRangeEnd / 2);
if (null != shortenedPolyline)
{
g.DrawLines(linePen, shortenedPolyline);
}
}
}
}
else
{
if (connectCircular)
{
g.DrawPolygon(linePen, stepPolylinePoints);
}
else
{
g.DrawLines(linePen, stepPolylinePoints);
}
}
}
public bool InitializeDocument(params object[] args)
{
if (args.Length == 0 || !(args[0] is LinePlotStyle))
{
return(false);
}
bool isFirstTime = (null == _doc);
_doc = (LinePlotStyle)args[0];
_tempDoc = _useDocumentCopy == UseDocument.Directly ? _doc : (LinePlotStyle)_doc.Clone();
Initialize(isFirstTime);
return(true);
}
public ILine AddLine(string nameId, Color color, double scale, LinePlotStyle plotStyle, DashStyle dashStyle)
{
if (LineExists(nameId))
{
return(GetLine(nameId));
}
ILine line = new FlowLine(nameId, color, scale);
line.Color = color;
line.Scale = scale;
line.PlotStyle = plotStyle;
line.DashStyle = dashStyle;
lines.Add(line);
return(line);
}
private void DrawLineMarker(ref Graphics g, Color lineColor, int x, int y, LinePlotStyle style)
{
using (Pen plotPen = new Pen(lineColor, 2))
{
switch (style)
{
case LinePlotStyle.Dots:
g.DrawEllipse(plotPen, x - 2, y - 2, 4, 4);
break;
case LinePlotStyle.Cross:
g.DrawLine(plotPen, x, y - 3, x, y + 3);
g.DrawLine(plotPen, x - 3, y, x + 3, y);
break;
case LinePlotStyle.Ex:
g.DrawLine(plotPen, x - 3, y - 3, x + 3, y + 3);
g.DrawLine(plotPen, x - 3, y + 3, x + 3, y - 3);
break;
case LinePlotStyle.Box:
g.DrawLine(plotPen, x - 3, y - 3, x + 3, y - 3);
g.DrawLine(plotPen, x + 3, y - 3, x + 3, y + 3);
g.DrawLine(plotPen, x + 3, y + 3, x - 3, y + 3);
g.DrawLine(plotPen, x - 3, y + 3, x - 3, y - 3);
break;
case LinePlotStyle.Triangle:
g.DrawLine(plotPen, x, y - 3, x + 3, y + 3);
g.DrawLine(plotPen, x + 3, y + 3, x - 3, y + 3);
g.DrawLine(plotPen, x - 3, y + 3, x, y - 3);
break;
default:
break;
}
}
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func <int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
// Bezier is only supported with point numbers n=4+3*k
// so trim the range appropriately
if (range.Length < 4)
{
return; // then too less points are in this range
}
PointF[] circularLinePoints;
if (connectCircular)
{
var circularLinePointsLengthM1 = 2 + TrimToValidBezierLength(range.Length);
circularLinePoints = new PointF[circularLinePointsLengthM1 + 1];
Array.Copy(allLinePoints, range.LowerBound, circularLinePoints, 0, range.Length); // Extract
circularLinePoints[circularLinePointsLengthM1] = circularLinePoints[0];
// amend missing control points
if (circularLinePointsLengthM1 - range.Length >= 1)
{
circularLinePoints[circularLinePointsLengthM1 - 1] = GdiExtensionMethods.Interpolate(circularLinePoints[circularLinePointsLengthM1 - 3], circularLinePoints[circularLinePointsLengthM1], 0.5); // Last Control point should be halfway between
}
if (circularLinePointsLengthM1 - range.Length >= 2)
{
circularLinePoints[circularLinePointsLengthM1 - 2] = GdiExtensionMethods.Interpolate(circularLinePoints[circularLinePointsLengthM1 - 3], circularLinePoints[circularLinePointsLengthM1], 0.5); // Middle Control point should be halfway between previous fixed point and last(=first) fixed point
}
range = range.WithUpperBoundExtendedBy(circularLinePointsLengthM1 - range.Length);
}
else // not circular
{
var trimmedLength = TrimToValidBezierLength(range.Length);
if (range.Length != trimmedLength)
{
range = range.WithUpperBoundShortenedBy(range.Length - trimmedLength);
}
if (range.LowerBound == 0 && trimmedLength == allLinePoints.Length)
{
circularLinePoints = allLinePoints;
}
else
{
circularLinePoints = new PointF[trimmedLength];
Array.Copy(allLinePoints, range.LowerBound, circularLinePoints, 0, trimmedLength); // Extract
}
}
if (null != symbolGap) // circular with symbol gap
{
var realSkipFrequency = skipFrequency % 3 == 0 ? skipFrequency : skipFrequency * 3; // least common multiple of skipFrequency and 3
var skipLinePoints = new PointF[0];
foreach (var segmentRange in GetSegmentRanges(range, symbolGap, realSkipFrequency, connectCircular))
{
if (segmentRange.IsFullRangeClosedCurve) // test if this is a closed polygon without any gaps -> draw a closed polygon and return
{
// use the whole circular arry to draw a closed polygon without any gaps
g.DrawBeziers(linePen, circularLinePoints);
}
else
{
var skipLinePointsLength = 1 + segmentRange.Length;
if (skipLinePoints.Length != skipLinePointsLength)
{
skipLinePoints = new PointF[skipLinePointsLength];
}
Array.Copy(circularLinePoints, segmentRange.IndexAtSubRangeStart, skipLinePoints, 0, skipLinePointsLength);
PointF[] shortenedLinePoints;
if (segmentRange.GapAtSubRangeStart != 0 || segmentRange.GapAtSubRangeEnd != 0)
{
shortenedLinePoints = GdiExtensionMethods.ShortenBezierCurve(skipLinePoints, segmentRange.GapAtSubRangeStart / 2, segmentRange.GapAtSubRangeEnd / 2);
}
else
{
shortenedLinePoints = skipLinePoints;
}
if (null != shortenedLinePoints)
{
g.DrawBeziers(linePen, shortenedLinePoints);
}
}
}
}
else // no symbol gap
{
g.DrawBeziers(linePen, circularLinePoints);
}
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func<int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
int lastIdx;
PointF[] subLinePoints = Segment2Connection_GetSubPoints(allLinePoints, range, layer, connectCircular, out lastIdx);
GraphicsPath gp = new GraphicsPath();
int i;
// special efforts are necessary to realize a line/symbol gap
// I decided to use a path for this
// and hope that not so many segments are added to the path due
// to the exclusion criteria that a line only appears between two symbols (rel<0.5)
// if the symbols do not overlap. So for a big array of points it is very likely
// that the symbols overlap and no line between the symbols needs to be plotted
if (null != symbolGap)
{
float startx, starty, stopx, stopy;
for (i = 0; i < lastIdx; i += 2)
{
var diff = GdiExtensionMethods.Subtract(subLinePoints[i + 1], subLinePoints[i]);
var diffLength = GdiExtensionMethods.VectorLength(diff);
int originalIndex = range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i);
double gapAtStart = 0 == i % skipFrequency ? symbolGap(originalIndex) : 0;
double gapAtEnd;
if ((0 == (i + 1) % skipFrequency) || ((i + 1) == range.Length))
{
gapAtEnd = ((i + 1) != range.Length) ? symbolGap(originalIndex + 1) : symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound));
}
else
{
gapAtEnd = 0;
}
var relAtStart = (float)(0.5 * gapAtStart / diffLength); // 0.5 because symbolGap is the full gap between two lines, thus between the symbol center and the beginning of the line it is only 1/2
var relAtEnd = (float)(0.5 * gapAtEnd / diffLength); // 0.5 because symbolGap is the full gap between two lines, thus between the symbol center and the beginning of the line it is only 1/2
if ((relAtStart + relAtEnd) < 1) // a line only appears if sum of the gaps is smaller than 1
{
startx = subLinePoints[i].X + relAtStart * diff.X;
starty = subLinePoints[i].Y + relAtStart * diff.Y;
stopx = subLinePoints[i + 1].X - relAtEnd * diff.X;
stopy = subLinePoints[i + 1].Y - relAtEnd * diff.Y;
gp.AddLine(startx, starty, stopx, stopy);
gp.StartFigure();
}
} // end for
g.DrawPath(linePen, gp);
gp.Reset();
}
else // no line symbol gap required, so we can use DrawLines to draw the lines
{
for (i = 0; i < lastIdx; i += 2)
{
gp.AddLine(subLinePoints[i].X, subLinePoints[i].Y, subLinePoints[i + 1].X, subLinePoints[i + 1].Y);
gp.StartFigure();
} // end for
g.DrawPath(linePen, gp);
gp.Reset();
}
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func <int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
PointF[] subLinePoints;
if (range.LowerBound == 0 && range.UpperBound == allLinePoints.Length)
{
// under optimal conditions we can use allLinePoints directly
subLinePoints = allLinePoints;
}
else
{
// otherwise, make a new array
subLinePoints = new PointF[range.Length];
Array.Copy(allLinePoints, range.LowerBound, subLinePoints, 0, range.Length); // Extract
}
int lastIdx = range.Length - 1;
var layerSize = layer.Size;
if (connectCircular)
{
if (null != symbolGap)
{
// convert points to bezier segments
var bezierSegments = GdiExtensionMethods.ClosedCardinalSplineToBezierSegments(subLinePoints, subLinePoints.Length);
var subBezierSegments = new PointF[0];
foreach (var segmentRange in GetSegmentRanges(range, symbolGap, skipFrequency, connectCircular))
{
if (segmentRange.IsFullRangeClosedCurve) // test if this is a closed polygon without any gaps -> draw a closed polygon and return
{
// use the whole circular arry to draw a closed polygon without any gaps
g.DrawClosedCurve(linePen, subLinePoints);
}
else
{
var subBezierLength = 3 * segmentRange.Length + 1;
if (subBezierSegments.Length != subBezierLength)
{
subBezierSegments = new PointF[subBezierLength];
}
Array.Copy(bezierSegments, segmentRange.IndexAtSubRangeStart * 3, subBezierSegments, 0, subBezierLength);
var shortenedBezierSegments = GdiExtensionMethods.ShortenBezierCurve(subBezierSegments, segmentRange.GapAtSubRangeStart / 2, segmentRange.GapAtSubRangeEnd / 2);
if (null != shortenedBezierSegments)
{
g.DrawBeziers(linePen, shortenedBezierSegments);
}
}
}
}
else
{
g.DrawClosedCurve(linePen, subLinePoints);
}
}
else // not circular
{
if (symbolGap != null)
{
// convert points to bezier segments
var bezierSegments = GdiExtensionMethods.OpenCardinalSplineToBezierSegments(subLinePoints, subLinePoints.Length);
var subBezierSegments = new PointF[0];
foreach (var segmentRange in GetSegmentRanges(range, symbolGap, skipFrequency, connectCircular))
{
if (segmentRange.IsFullRangeClosedCurve) // test if this is a closed polygon without any gaps -> draw a closed polygon and return
{
// use the whole circular arry to draw a closed polygon without any gaps
g.DrawCurve(linePen, subLinePoints);
}
else
{
var subBezierLength = 3 * segmentRange.Length + 1;
if (subBezierSegments.Length != subBezierLength)
{
subBezierSegments = new PointF[subBezierLength];
}
Array.Copy(bezierSegments, segmentRange.IndexAtSubRangeStart * 3, subBezierSegments, 0, subBezierLength);
var shortenedBezierSegments = GdiExtensionMethods.ShortenBezierCurve(subBezierSegments, segmentRange.GapAtSubRangeStart / 2, segmentRange.GapAtSubRangeEnd / 2);
if (null != shortenedBezierSegments)
{
g.DrawBeziers(linePen, shortenedBezierSegments);
}
}
}
}
else
{
g.DrawCurve(linePen, subLinePoints);
}
}
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func<int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
PointF[] circularLinePoints;
if (!connectCircular && range.LowerBound == 0 && range.UpperBound == allLinePoints.Length)
{
// under optimal conditions we can use allLinePoints directly
circularLinePoints = allLinePoints;
}
else
{
// otherwise, make a new array
circularLinePoints = new PointF[range.Length + (connectCircular ? 1 : 0)];
Array.Copy(allLinePoints, range.LowerBound, circularLinePoints, 0, range.Length); // Extract
if (connectCircular)
circularLinePoints[circularLinePoints.Length - 1] = circularLinePoints[0];
}
int lastIdx = range.Length - 1 + (connectCircular ? 1 : 0);
GraphicsPath gp = new GraphicsPath();
var layerSize = layer.Size;
var rangeLowerBound = range.LowerBound;
// special efforts are necessary to realize a line/symbol gap
// I decided to use a path for this
// and hope that not so many segments are added to the path due
// to the exclusion criteria that a line only appears between two symbols (rel<0.5)
// if the symbols do not overlap. So for a big array of points it is very likely
// that the symbols overlap and no line between the symbols needs to be plotted
if (null != symbolGap)
{
float xdiff, ydiff, startx, starty, stopx, stopy;
if (skipFrequency <= 1) // skip all scatter symbol gaps -> thus skipOffset can be ignored
{
for (int i = 0; i < lastIdx; i++)
{
xdiff = circularLinePoints[i + 1].X - circularLinePoints[i].X;
ydiff = circularLinePoints[i + 1].Y - circularLinePoints[i].Y;
var diffLength = System.Math.Sqrt(xdiff * xdiff + ydiff * ydiff);
double gapAtStart = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i));
double gapAtEnd;
if (connectCircular && skipFrequency >= (range.Length - i))
gapAtEnd = symbolGap(range.OriginalFirstPoint);
else if (skipFrequency <= (range.Length - 1 - i))
gapAtEnd = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i + skipFrequency));
else
gapAtEnd = 0;
var relAtStart = (float)(0.5 * gapAtStart / diffLength); // 0.5 because symbolGap is the full gap between two lines, thus between the symbol center and the beginning of the line it is only 1/2
var relAtEnd = (float)(0.5 * gapAtEnd / diffLength); // 0.5 because symbolGap is the full gap between two lines, thus between the symbol center and the beginning of the line it is only 1/2
if ((relAtStart + relAtEnd) < 1) // a line only appears if sum of the gaps is smaller than 1
{
startx = circularLinePoints[i].X + relAtStart * xdiff;
starty = circularLinePoints[i].Y + relAtStart * ydiff;
stopx = circularLinePoints[i + 1].X - relAtEnd * xdiff;
stopy = circularLinePoints[i + 1].Y - relAtEnd * ydiff;
gp.AddLine(startx, starty, stopx, stopy);
gp.StartFigure();
}
} // end for
g.DrawPath(linePen, gp);
gp.Reset();
}
else // skipFrequency is > 1
{
for (int i = 0; i < lastIdx; i += skipFrequency)
{
int subPointLengthM1 = Math.Min(skipFrequency, circularLinePoints.Length - 1 - i);
double gapAtStart = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i));
double gapAtEnd;
if (connectCircular && skipFrequency >= (range.Length - i))
gapAtEnd = symbolGap(range.OriginalFirstPoint);
else if (skipFrequency <= (range.Length - 1 - i))
gapAtEnd = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i + skipFrequency));
else
gapAtEnd = 0;
if (subPointLengthM1 >= 1)
{
var polyline = circularLinePoints.ShortenPartialPolylineByDistanceFromStartAndEnd(i, i + subPointLengthM1, gapAtStart / 2, gapAtEnd / 2);
if (null != polyline)
g.DrawLines(linePen, polyline);
}
} // end for
}
}
else // no line symbol gap required, so we can use DrawLines to draw the lines
{
if (circularLinePoints.Length > 1) // we don't want to have a drawing exception if number of points is only one
{
g.DrawLines(linePen, circularLinePoints);
}
}
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func <int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
if (range.Length <= 1)
{
return; // seems to be only a single point, thus no connection possible
}
PointF[] circularLinePoints;
int indexBasePlotPoints; // index of the first plot point of this range in circularLinePoints array
if (connectCircular) // we have to copy the array in order to append the first point to the end
{
// otherwise, make a new array
circularLinePoints = new PointF[range.Length + 1];
Array.Copy(allLinePoints, range.LowerBound, circularLinePoints, 0, range.Length); // Extract
circularLinePoints[circularLinePoints.Length - 1] = circularLinePoints[0];
indexBasePlotPoints = 0;
}
else // use the array directly without copying
{
circularLinePoints = allLinePoints;
indexBasePlotPoints = range.LowerBound;
}
if (null != symbolGap)
{
foreach (var segmentRange in GetSegmentRanges(range, symbolGap, skipFrequency, connectCircular))
{
if (segmentRange.IsFullRangeClosedCurve) // test if this is a closed polygon without any gaps -> draw a closed polygon and return
{
// use the whole circular arry to draw a closed polygon without any gaps
g.DrawPolygon(linePen, circularLinePoints);
}
else if (segmentRange.Length == 1) // special case only one line segment
{
int plotIndexAtStart = segmentRange.IndexAtSubRangeStart + indexBasePlotPoints;
int plotIndexAtEnd = segmentRange.IndexAtSubRangeEnd + indexBasePlotPoints;
var xdiff = circularLinePoints[plotIndexAtEnd].X - circularLinePoints[plotIndexAtStart].X;
var ydiff = circularLinePoints[plotIndexAtEnd].Y - circularLinePoints[plotIndexAtStart].Y;
var diffLength = System.Math.Sqrt(xdiff * xdiff + ydiff * ydiff);
var relAtStart = (float)(0.5 * segmentRange.GapAtSubRangeStart / diffLength); // 0.5 because symbolGap is the full gap between two lines, thus between the symbol center and the beginning of the line it is only 1/2
var relAtEnd = (float)(0.5 * segmentRange.GapAtSubRangeEnd / diffLength); // 0.5 because symbolGap is the full gap between two lines, thus between the symbol center and the beginning of the line it is only 1/2
if ((relAtStart + relAtEnd) < 1) // a line only appears if sum of the gaps is smaller than 1
{
var startx = circularLinePoints[plotIndexAtStart].X + relAtStart * xdiff;
var starty = circularLinePoints[plotIndexAtStart].Y + relAtStart * ydiff;
var stopx = circularLinePoints[plotIndexAtEnd].X - relAtEnd * xdiff;
var stopy = circularLinePoints[plotIndexAtEnd].Y - relAtEnd * ydiff;
g.DrawLine(linePen, startx, starty, stopx, stopy);
}
}
else
{
int plotIndexAtStart = segmentRange.IndexAtSubRangeStart + indexBasePlotPoints;
int plotIndexAtEnd = segmentRange.IndexAtSubRangeEnd + indexBasePlotPoints;
var shortenedPolyline = circularLinePoints.ShortenPartialPolylineByDistanceFromStartAndEnd(plotIndexAtStart, plotIndexAtEnd, segmentRange.GapAtSubRangeStart / 2, segmentRange.GapAtSubRangeEnd / 2);
if (null != shortenedPolyline)
{
g.DrawLines(linePen, shortenedPolyline);
}
}
} // end for
}
else // no line symbol gap required, so we can use DrawLines or DrawPolygon to draw the lines
{
if (connectCircular) // array was already copied from original array
{
g.DrawPolygon(linePen, circularLinePoints);
}
else if (indexBasePlotPoints == 0 && range.Length == circularLinePoints.Length) // can use original array directly
{
g.DrawLines(linePen, circularLinePoints);
}
else
{
circularLinePoints = new PointF[range.Length];
Array.Copy(allLinePoints, range.LowerBound, circularLinePoints, 0, range.Length);
g.DrawLines(linePen, circularLinePoints);
}
}
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func<int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
PointF[] subLinePoints;
if (range.LowerBound == 0 && range.UpperBound == allLinePoints.Length)
{
// under optimal conditions we can use allLinePoints directly
subLinePoints = allLinePoints;
}
else
{
// otherwise, make a new array
subLinePoints = new PointF[range.Length];
Array.Copy(allLinePoints, range.LowerBound, subLinePoints, 0, range.Length); // Extract
}
int lastIdx = range.Length - 1;
var layerSize = layer.Size;
if (connectCircular)
{
if (symbolGap != null)
{
// convert points to bezier segments
var bezierSegments = GdiExtensionMethods.ClosedCardinalSplineToBezierSegments(subLinePoints, subLinePoints.Length);
var subBezierSegments = new PointF[0];
int subPointLengthM1, subBezierLength;
for (int i = 0; i < (range.Length); i += skipFrequency)
{
subPointLengthM1 = Math.Min(skipFrequency, range.Length - i);
int originalIndexAtStart = range.GetOriginalRowIndexFromPlotPointIndex(i + range.LowerBound);
double gapAtStart = symbolGap(originalIndexAtStart);
int originalIndexAtEnd = ((i + skipFrequency) < range.Length) ? range.GetOriginalRowIndexFromPlotPointIndex(i + range.LowerBound + skipFrequency) : range.OriginalFirstPoint;
double gapAtEnd = symbolGap(originalIndexAtEnd);
subBezierLength = 3 * subPointLengthM1 + 1;
if (subBezierSegments.Length != subBezierLength)
subBezierSegments = new PointF[subBezierLength];
Array.Copy(bezierSegments, i * 3, subBezierSegments, 0, subBezierLength);
var shortenedBezierSegments = GdiExtensionMethods.ShortenBezierCurve(subBezierSegments, gapAtStart / 2, gapAtEnd / 2);
if (null != shortenedBezierSegments)
{
g.DrawBeziers(linePen, shortenedBezierSegments);
}
}
}
else
{
g.DrawClosedCurve(linePen, subLinePoints);
}
}
else
{
if (symbolGap != null)
{
// convert points to bezier segments
var bezierSegments = GdiExtensionMethods.OpenCardinalSplineToBezierSegments(subLinePoints, subLinePoints.Length);
var subBezierSegments = new PointF[0];
int subPointLengthM1, subBezierLength;
for (int i = 0; i < (range.Length - 1); i += skipFrequency)
{
subPointLengthM1 = Math.Min(skipFrequency, range.Length - 1 - i);
int originalIndex = range.GetOriginalRowIndexFromPlotPointIndex(i + range.LowerBound);
double gapAtStart = symbolGap(originalIndex);
double gapAtEnd = subPointLengthM1 == skipFrequency ? symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(i + range.LowerBound + skipFrequency)) : 0;
subBezierLength = 3 * subPointLengthM1 + 1;
if (subBezierSegments.Length != subBezierLength)
subBezierSegments = new PointF[subBezierLength];
Array.Copy(bezierSegments, i * 3, subBezierSegments, 0, subBezierLength);
var shortenedBezierSegments = GdiExtensionMethods.ShortenBezierCurve(subBezierSegments, gapAtStart / 2, gapAtEnd / 2);
if (null != shortenedBezierSegments)
{
g.DrawBeziers(linePen, shortenedBezierSegments);
}
}
}
else
{
g.DrawCurve(linePen, subLinePoints);
}
}
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func <int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
PointF[] subLinePoints = Segment2Connection_GetSubPoints(allLinePoints, range, layer, connectCircular, out var lastIdx);
var gp = new GraphicsPath();
int i;
// special efforts are necessary to realize a line/symbol gap
// I decided to use a path for this
// and hope that not so many segments are added to the path due
// to the exclusion criteria that a line only appears between two symbols (rel<0.5)
// if the symbols do not overlap. So for a big array of points it is very likely
// that the symbols overlap and no line between the symbols needs to be plotted
if (null != symbolGap)
{
float startx, starty, stopx, stopy;
for (i = 0; i < lastIdx; i += 2)
{
var diff = GdiExtensionMethods.Subtract(subLinePoints[i + 1], subLinePoints[i]);
var diffLength = GdiExtensionMethods.VectorLength(diff);
int originalIndex = range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i);
double gapAtStart = 0 == i % skipFrequency ? symbolGap(originalIndex) : 0;
double gapAtEnd;
if ((0 == (i + 1) % skipFrequency) || ((i + 1) == range.Length))
{
gapAtEnd = ((i + 1) != range.Length) ? symbolGap(originalIndex + 1) : symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound));
}
else
{
gapAtEnd = 0;
}
var relAtStart = (float)(0.5 * gapAtStart / diffLength); // 0.5 because symbolGap is the full gap between two lines, thus between the symbol center and the beginning of the line it is only 1/2
var relAtEnd = (float)(0.5 * gapAtEnd / diffLength); // 0.5 because symbolGap is the full gap between two lines, thus between the symbol center and the beginning of the line it is only 1/2
if ((relAtStart + relAtEnd) < 1) // a line only appears if sum of the gaps is smaller than 1
{
startx = subLinePoints[i].X + relAtStart * diff.X;
starty = subLinePoints[i].Y + relAtStart * diff.Y;
stopx = subLinePoints[i + 1].X - relAtEnd * diff.X;
stopy = subLinePoints[i + 1].Y - relAtEnd * diff.Y;
gp.AddLine(startx, starty, stopx, stopy);
gp.StartFigure();
}
} // end for
g.DrawPath(linePen, gp);
gp.Reset();
}
else // no line symbol gap required, so we can use DrawLines to draw the lines
{
for (i = 0; i < lastIdx; i += 2)
{
gp.AddLine(subLinePoints[i].X, subLinePoints[i].Y, subLinePoints[i + 1].X, subLinePoints[i + 1].Y);
gp.StartFigure();
} // end for
g.DrawPath(linePen, gp);
gp.Reset();
}
}
void InitializeStyles()
{
// Clear the previous controller cache
_additionalPlotStyle = null;
if (_combinedScatterLineGroupController != null)
{
_combinedScatterLineGroupController.ChildControlChanged -= EhView_ActiveChildControlChanged;
_combinedScatterLineGroupController = null;
}
_styleControllerList.Clear();
// start to create new controllers
if (_tempdoc.Style.Count > 0)
{
bool addHelperStyle = NeedsHelperStyle();
bool useCombinedTab = UseCombinedScatterLineGroupTab();
if (useCombinedTab)
{
List <ControlViewElement> combList = new List <ControlViewElement>();
// create the controllers
IMVCANController ct1 = GetStyleController(_tempdoc.Style[0]);
_styleControllerList.Add(ct1);
if (addHelperStyle)
{
IPlotArea layer = Main.DocumentPath.GetRootNodeImplementing <IPlotArea>(_doc);
// add either line or scatter
if (_tempdoc.Style[0] is LinePlotStyle)
{
ScatterPlotStyle scatterStyle = new ScatterPlotStyle();
scatterStyle.ParentObject = _tempdoc.Style;
_tempdoc.Style.PrepareNewSubStyle(scatterStyle, layer, _doc.GetRangesAndPoints(layer));
_additionalPlotStyle = scatterStyle;
scatterStyle.Shape = Altaxo.Graph.Gdi.Plot.Styles.XYPlotScatterStyles.Shape.NoSymbol;
_additionalPlotStyleController = GetStyleController(_additionalPlotStyle);
combList.Add(new ControlViewElement("Symbol", _additionalPlotStyleController));
combList.Add(new ControlViewElement("Line", ct1));
}
else
{
LinePlotStyle lineStyle = new LinePlotStyle();
lineStyle.ParentObject = _tempdoc.Style;
_tempdoc.Style.PrepareNewSubStyle(lineStyle, layer, _doc.GetRangesAndPoints(layer));
_additionalPlotStyle = lineStyle;
lineStyle.Connection = Altaxo.Graph.Gdi.Plot.Styles.XYPlotLineStyles.ConnectionStyle.NoLine;
_additionalPlotStyleController = GetStyleController(_additionalPlotStyle);
combList.Add(new ControlViewElement("Symbol", ct1));
combList.Add(new ControlViewElement("Line", _additionalPlotStyleController));
}
}
else // no helper style, i.e. second style is line style
{
// create the controllers
IMVCANController ct2 = GetStyleController(_tempdoc.Style[1]);
_styleControllerList.Add(ct2);
combList.Add(new ControlViewElement("Symbol", ct1));
combList.Add(new ControlViewElement("Line", ct2));
}
combList.Add(new ControlViewElement(string.Empty, this, this._plotGroupView));
_combinedScatterLineGroupController = new Common.MultiChildController(combList.ToArray(), true);
Current.Gui.FindAndAttachControlTo(_combinedScatterLineGroupController);
string title;
if (null != _additionalPlotStyle)
{
title = string.Format("#{0}:{1}", 1, Current.Gui.GetUserFriendlyClassName(_tempdoc.Style[0].GetType()));
}
else
{
title = "#1&&2:Symbol&&Line";
}
AddTab(title, _combinedScatterLineGroupController, _combinedScatterLineGroupController.ViewObject);
_combinedScatterLineGroupController.ChildControlChanged += this.EhView_ActiveChildControlChanged;
} // if use CombinedTab
// now the remaining styles
int start = useCombinedTab ? (addHelperStyle ? 1 : 2) : 0;
for (int i = start; i < _tempdoc.Style.Count; i++)
{
IMVCANController ctrl = GetStyleController(_tempdoc.Style[i]);
_styleControllerList.Add(ctrl);
string title = string.Format("#{0}:{1}", (i + 1), Current.Gui.GetUserFriendlyClassName(_tempdoc.Style[i].GetType()));
AddTab(title, ctrl, ctrl != null ? ctrl.ViewObject : null);
}
}
base.SetElements(false);
}
/// <summary>
/// Template to make a line draw.
/// </summary>
/// <param name="g">Graphics context.</param>
/// <param name="allLinePoints">The plot data. Don't use the Range property of the pdata, since it is overriden by the next argument.</param>
/// <param name="range">The plot range to use.</param>
/// <param name="layer">Graphics layer.</param>
/// <param name="linePen">The pen to draw the line.</param>
/// <param name="symbolGap">The size of the symbol gap. Argument is the original index of the data. The return value is the absolute symbol gap at this index.
/// This function is null if no symbol gap is required.</param>
/// <param name="skipFrequency">Skip frequency. Normally 1, thus all gaps are taken into account. If 2, only every 2nd gap is taken into account, and so on.</param>
/// <param name="connectCircular">If true, there is a line connecting the start and the end of the range.</param>
/// <param name="linePlotStyle">The line plot style.</param>
public override void PaintOneRange(
Graphics g,
PointF[] allLinePoints,
IPlotRange range,
IPlotArea layer,
PenX linePen,
Func<int, double> symbolGap,
int skipFrequency,
bool connectCircular,
LinePlotStyle linePlotStyle)
{
// Bezier is only supported with point numbers n=4+3*k
// so trim the range appropriately
if (range.Length < 4)
return; // then too less points are in this range
if (connectCircular)
{
var circularLinePointsLengthM1 = 2 + TrimToValidBezierLength(range.Length);
var circularLinePoints = new PointF[circularLinePointsLengthM1 + 1];
Array.Copy(allLinePoints, range.LowerBound, circularLinePoints, 0, range.Length); // Extract
circularLinePoints[circularLinePointsLengthM1] = circularLinePoints[0];
// amend missing control points
if (circularLinePointsLengthM1 - range.Length >= 1)
circularLinePoints[circularLinePointsLengthM1 - 1] = GdiExtensionMethods.Interpolate(circularLinePoints[circularLinePointsLengthM1 - 3], circularLinePoints[circularLinePointsLengthM1], 0.5); // Last Control point should be halfway between
if (circularLinePointsLengthM1 - range.Length >= 2)
circularLinePoints[circularLinePointsLengthM1 - 2] = GdiExtensionMethods.Interpolate(circularLinePoints[circularLinePointsLengthM1 - 3], circularLinePoints[circularLinePointsLengthM1], 0.5); // Middle Control point should be halfway between previous fixed point and last(=first) fixed point
if (null != symbolGap) // circular with symbol gap
{
var realSkipFrequency = skipFrequency % 3 == 0 ? skipFrequency : skipFrequency * 3; // least common multiple of skipFrequency and 3
for (int i = 0; i < range.Length; i += realSkipFrequency)
{
var skipLinePointsLength = Math.Min(realSkipFrequency + 1, TrimToValidBezierLength(circularLinePoints.Length - i));
if (skipLinePointsLength >= 4)
{
var skipLinePoints = new PointF[skipLinePointsLength];
Array.Copy(circularLinePoints, i, skipLinePoints, 0, skipLinePointsLength); // Extract
var gapAtStart = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i));
double gapAtEnd;
if (connectCircular && realSkipFrequency >= (range.Length - 1 - i))
gapAtEnd = symbolGap(range.OriginalFirstPoint);
else if (realSkipFrequency <= (range.Length - 1 - i))
gapAtEnd = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i + realSkipFrequency));
else
gapAtEnd = 0;
if (gapAtStart != 0 || gapAtEnd != 0)
{
skipLinePoints = GdiExtensionMethods.ShortenBezierCurve(skipLinePoints, gapAtStart / 2, gapAtEnd / 2);
}
if (null != skipLinePoints)
{
g.DrawBeziers(linePen, skipLinePoints);
}
}
}
}
else // circular without symbol gap
{
g.DrawBeziers(linePen, circularLinePoints);
}
}
else // not circular
{
if (null != symbolGap) // not circular with symbol gap
{
var realSkipFrequency = skipFrequency % 3 == 0 ? skipFrequency : skipFrequency * 3; // least common multiple of skipFrequency and 3
for (int i = 0; i < range.Length; i += realSkipFrequency)
{
var skipLinePointsLength = Math.Min(realSkipFrequency + 1, TrimToValidBezierLength(range.Length - i));
if (skipLinePointsLength >= 4)
{
var skipLinePoints = new PointF[skipLinePointsLength];
Array.Copy(allLinePoints, range.LowerBound + i, skipLinePoints, 0, skipLinePointsLength); // Extract
var gapAtStart = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i));
var gapAtEnd = symbolGap(range.GetOriginalRowIndexFromPlotPointIndex(range.LowerBound + i + skipLinePointsLength - 1));
if (gapAtStart != 0 || gapAtEnd != 0)
{
skipLinePoints = GdiExtensionMethods.ShortenBezierCurve(skipLinePoints, gapAtStart / 2, gapAtEnd / 2);
}
if (null != skipLinePoints)
{
g.DrawBeziers(linePen, skipLinePoints);
}
}
}
}
else // not circular without symbol gap
{
var trimmedLength = TrimToValidBezierLength(range.Length);
var subLinePoints = new PointF[trimmedLength];
Array.Copy(allLinePoints, range.LowerBound, subLinePoints, 0, trimmedLength); // Extract
g.DrawBeziers(linePen, subLinePoints);
}
}
}