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);
}
private static Geometry BuildRadialStripe(RadCircle circle, RadCircle previousCircle)
{
DoughnutSegmentData segment = new DoughnutSegmentData()
{
Center = new RadPoint(circle.Center.X + 0.5, circle.Center.Y + 0.5),
Radius1 = circle.Radius + 0.5,
Radius2 = previousCircle.Radius - 0.5,
StartAngle = 0,
SweepAngle = 359.99 // 360 does not render properly
};
if (segment.Radius1 < 0)
{
segment.Radius1 = 0;
}
if (segment.Radius2 < 0)
{
segment.Radius2 = 0;
}
return(DoughnutSegmentRenderer.RenderArc(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);
}
}