/// <summary>
/// Called when DataSource property changed
/// </summary>
/// <param name="oldValue"></param>
/// <param name="newValue"></param>
protected override void OnDataSourceChanged(System.Collections.IEnumerable oldValue, System.Collections.IEnumerable newValue)
{
Segment = null;
base.OnDataSourceChanged(oldValue, newValue);
}
/// <summary>
/// Creates the segments of SplineAreaSeries
/// </summary>
public override void CreateSegments()
{
int index = -1;
double[] yCoef = null;
var segmentPoints = new List <ChartPoint>();
double Origin = this.ActualXAxis != null ? this.ActualXAxis.Origin : 0.0;
if (ActualXAxis != null && ActualXAxis.Origin == 0 && ActualYAxis is LogarithmicAxis &&
(ActualYAxis as LogarithmicAxis).Minimum != null)
{
Origin = (double)(ActualYAxis as LogarithmicAxis).Minimum;
}
List <double> xValues = null;
bool isGrouping = this.ActualXAxis is CategoryAxis && !(this.ActualXAxis as CategoryAxis).IsIndexed;
if (isGrouping)
{
xValues = GroupedXValuesIndexes;
}
else
{
xValues = GetXValues();
}
if (xValues != null && xValues.Count > 1)
{
if (isGrouping)
{
Segments.Clear();
Adornments.Clear();
if (SplineType == SplineType.Monotonic)
{
GetMonotonicSpline(xValues, GroupedSeriesYValues[0]);
}
else if (SplineType == SplineType.Cardinal)
{
GetCardinalSpline(xValues, GroupedSeriesYValues[0]);
}
else
{
this.NaturalSpline(xValues, GroupedSeriesYValues[0], out yCoef);
}
ChartPoint initialPoint = new ChartPoint(xValues[0], Origin);
segmentPoints.Add(initialPoint);
initialPoint = new ChartPoint(xValues[0], double.IsNaN(GroupedSeriesYValues[0][0]) ? Origin : GroupedSeriesYValues[0][0]);
segmentPoints.Add(initialPoint);
for (int i = 0; i < xValues.Count; i++)
{
index = i + 1;
if (index < xValues.Count && index < GroupedSeriesYValues[0].Count)
{
ChartPoint startPoint = new ChartPoint(xValues[i], GroupedSeriesYValues[0][i]);
ChartPoint endPoint = new ChartPoint(xValues[index], GroupedSeriesYValues[0][index]);
ChartPoint startControlPoint;
ChartPoint endControlPoint;
// Calculate curve points.
if (SplineType == SplineType.Monotonic)
{
startControlPoint = startControlPoints[index - 1];
endControlPoint = endControlPoints[index - 1];
}
else if (SplineType == SplineType.Cardinal)
{
startControlPoint = startControlPoints[index - 1];
endControlPoint = endControlPoints[index - 1];
}
else
{
GetBezierControlPoints(startPoint, endPoint, yCoef[i], yCoef[index], out startControlPoint, out endControlPoint);
}
segmentPoints.AddRange(new ChartPoint[] { startControlPoint, endControlPoint, endPoint });
}
}
if (Segment == null || Segments.Count == 0)
{
Segment = new SplineAreaSegment(segmentPoints, xValues, GroupedSeriesYValues[0], this);
Segments.Add(Segment);
}
if (AdornmentsInfo != null)
{
AddAreaAdornments(GroupedSeriesYValues[0]);
}
}
else
{
ClearUnUsedAdornments(this.DataCount);
if (SplineType == SplineType.Monotonic)
{
GetMonotonicSpline(xValues, YValues);
}
else if (SplineType == SplineType.Cardinal)
{
GetCardinalSpline(xValues, YValues);
}
else
{
this.NaturalSpline(xValues, YValues, out yCoef);
}
ChartPoint initialPoint = new ChartPoint(xValues[0], Origin);
segmentPoints.Add(initialPoint);
initialPoint = new ChartPoint(xValues[0], double.IsNaN(YValues[0]) ? Origin : YValues[0]);
segmentPoints.Add(initialPoint);
for (int i = 0; i < DataCount; i++)
{
index = i + 1;
if (index < DataCount)
{
ChartPoint startPoint = new ChartPoint(xValues[i], YValues[i]);
ChartPoint endPoint = new ChartPoint(xValues[index], YValues[index]);
ChartPoint startControlPoint;
ChartPoint endControlPoint;
// Calculate curve points.
if (SplineType == SplineType.Monotonic)
{
startControlPoint = startControlPoints[index - 1];
endControlPoint = endControlPoints[index - 1];
}
else if (SplineType == SplineType.Cardinal)
{
startControlPoint = startControlPoints[index - 1];
endControlPoint = endControlPoints[index - 1];
}
else
{
GetBezierControlPoints(startPoint, endPoint, yCoef[i], yCoef[index], out startControlPoint, out endControlPoint);
}
segmentPoints.AddRange(new ChartPoint[] { startControlPoint, endControlPoint, endPoint });
}
}
if (Segment == null || Segments.Count == 0)
{
Segment = new SplineAreaSegment(segmentPoints, xValues, YValues, this);
Segments.Add(Segment);
}
else
{
Segment.Item = ActualData;
(Segment as SplineAreaSegment).SetData(segmentPoints, xValues, YValues);
}
if (AdornmentsInfo != null)
{
AddAreaAdornments(YValues);
}
}
}
}
