private void UpdateLabels(RadSize availableSize)
{
RadRect availableRect = new RadRect(availableSize.Width, availableSize.Height);
RadRect ellipseRect = RadRect.ToSquare(availableRect, false);
ellipseRect = RadRect.CenterRect(ellipseRect, availableRect);
double radius = ellipseRect.Width / 2;
RadPoint center = ellipseRect.Center;
RadPoint arcPosition;
foreach (AxisLabelModel label in this.owner.labels)
{
if (!label.isVisible)
{
continue;
}
double angle = this.owner.IsInverse ? 360 - (double)label.normalizedPosition * 360 : (double)label.normalizedPosition * 360;
arcPosition = RadMath.GetArcPoint(angle, center, radius);
this.UpdateMargins(ellipseRect, label.desiredSize, arcPosition);
}
double offset = this.owner.LineThickness + this.owner.MajorTickLength;
this.margins.Left += offset;
this.margins.Top += offset;
this.margins.Right += offset;
this.margins.Bottom += offset;
}
protected override RadRect ArrangeAxes(RadRect rect)
{
IRadialAxis angleAxis = this.primarySecondAxis as IRadialAxis;
if (angleAxis == null)
{
throw new InvalidOperationException("AngleAxis of a polar chart area must be radial.");
}
RadRect ellipseRect = RadRect.ToSquare(rect, false);
ellipseRect = RadRect.CenterRect(ellipseRect, rect);
RadSize ellipseSize = new RadSize(ellipseRect.Width, ellipseRect.Height);
RadRect remaining = ellipseRect;
// Measure the second (radial) axis first; it will inflate the plot area
this.primarySecondAxis.Measure(ellipseSize);
this.primarySecondAxis.Arrange(ellipseRect);
RadThickness margins = this.primarySecondAxis.desiredMargin;
remaining.X += margins.Left;
remaining.Y += margins.Top;
remaining.Width -= margins.Left + margins.Right;
remaining.Height -= margins.Top + margins.Bottom;
remaining = RadRect.ToSquare(remaining, false);
remaining = RadRect.CenterRect(remaining, ellipseRect);
this.primaryFirstAxis.Measure(ellipseSize);
this.primaryFirstAxis.Arrange(remaining);
return(remaining);
}