private void UpdateHighlightPath(PieDataPoint dataPoint, PieUpdateContext updateContext)
{
DoughnutSegmentData segment = new DoughnutSegmentData()
{
Center = new RadPoint(updateContext.Center.X, updateContext.Center.Y),
Radius1 = updateContext.Radius,
Radius2 = updateContext.Radius * this.ParentSeries.HighlightInnerRadiusFactor,
StartAngle = updateContext.StartAngle,
SweepAngle = dataPoint.SweepAngle,
SweepDirection = updateContext.SweepDirection
};
this.highlightPath.Data = DoughnutSegmentRenderer.Render(dataPoint, segment);
}
protected override void UpdateCore(PieDataPoint dataPoint, PieUpdateContext context)
{
var doughnutContext = context as DoughnutUpdateContext;
if (doughnutContext != null)
{
var segmentData = DoughnutSegment.GetSegmentData(dataPoint, doughnutContext);
var highlightSegmentData = DoughnutSegment.GetSegmentData(dataPoint, doughnutContext);
highlightSegmentData.Radius2 = 0.9 * context.Radius;
if (context.SweepDirection == SweepDirection.Clockwise)
{
context.StartAngle += dataPoint.SweepAngle;
}
else
{
context.StartAngle -= dataPoint.SweepAngle;
}
this.Path.Data = DoughnutSegmentRenderer.Render(dataPoint, segmentData);
this.HighlightPath.Data = DoughnutSegmentRenderer.Render(dataPoint, highlightSegmentData);
var doughnutPoint = dataPoint as DoughnutDataPoint;
if (doughnutPoint != null)
{
doughnutPoint.Radius = doughnutContext.Radius;
doughnutPoint.InnerRadius = doughnutContext.Radius * doughnutContext.InnerRadiusFactor;
doughnutPoint.CenterPoint = doughnutContext.Center;
}
}
else
{
base.UpdateCore(dataPoint, context);
}
}