internal override void ArrangeLabel(FrameworkElement visual, ChartSeriesLabelUpdateContext context)
{
RadSize size = MeasureVisual(visual);
PieDataPoint piePoint = context.Point as PieDataPoint;
double radius = this.updateContext.Radius;
double offsetFromCenter = radius * piePoint.OffsetFromCenter;
double offset = context.Definition.Margin.Left;
// calculate the position of the label, depending on its size
this.updateContext.Radius = radius - offset + offsetFromCenter;
this.updateContext.StartAngle = piePoint.startAngle;
double angle = piePoint.startAngle;
if (this.AngleRange.SweepDirection == ChartSweepDirection.Clockwise)
{
angle += piePoint.sweepAngle / 2;
}
else
{
angle -= piePoint.sweepAngle / 2;
}
Point middlePoint = this.updateContext.CalculateArcPoint(angle);
middlePoint.X += size.Width * Math.Cos(angle * RadMath.DegToRadFactor) / 2;
middlePoint.Y += size.Height * Math.Sin(angle * RadMath.DegToRadFactor) / 2;
RadRect labelRect = RadRect.Round(new RadRect(middlePoint.X - (size.Width / 2), middlePoint.Y - (size.Height / 2), size.Width, size.Height));
this.ArrangeUIElement(visual, labelRect);
this.updateContext.Radius = radius;
}
internal override void ArrangeTicks()
{
double x, y, lineHeight;
double tickLength = this.owner.tickSize.Width;
double tickThickness = this.owner.tickSize.Height;
if (this.owner.TickPlacementCache == ScaleElementPlacement.TopLeft)
{
x = this.owner.Line.X1 - (this.owner.LineThicknessCache / 2) - tickLength;
}
else if (this.owner.TickPlacementCache == ScaleElementPlacement.Center)
{
double fix = (tickLength % 2 == 0 && this.owner.LineThicknessCache % 2 == 1) ? 1 : 0;
x = this.owner.Line.X1 - ((tickLength + fix) / 2);
}
else
{
x = this.owner.Line.X1 + (this.owner.LineThicknessCache / 2);
}
lineHeight = this.owner.Line.Y2 - this.owner.Line.Y1;
foreach (var tick in this.owner.Ticks)
{
y = this.owner.Line.Y2 - tickThickness / 2.0 - (double)(tick.normalizedValue * (decimal)lineHeight);
tick.layoutSlot = RadRect.Round(new RadRect(x, y, tickLength, tickThickness));
}
}
private static RadRect CalculatePlotAreaRect(RadRect availableRect, AxisStack leftStack, AxisStack topStack, AxisStack rightStack, AxisStack bottomStack)
{
RadPoint topLeft = new RadPoint();
double finalLeftRectWidth = leftStack.desiredWidth + leftStack.desiredMargin.Left + leftStack.desiredMargin.Right;
double maxLeftMargin = Math.Max(topStack.desiredMargin.Left, bottomStack.desiredMargin.Left);
topLeft.X = Math.Max(finalLeftRectWidth, maxLeftMargin);
double finalTopRectHeight = topStack.desiredHeight + topStack.desiredMargin.Top + topStack.desiredMargin.Bottom;
double maxTopMargin = Math.Max(leftStack.desiredMargin.Top, rightStack.desiredMargin.Top);
topLeft.Y = Math.Max(finalTopRectHeight, maxTopMargin);
RadPoint bottomRight = new RadPoint();
double finalRightRectWidth = rightStack.desiredWidth + rightStack.desiredMargin.Left + rightStack.desiredMargin.Right;
double maxRightMargin = Math.Max(topStack.desiredMargin.Right, bottomStack.desiredMargin.Right);
bottomRight.X = availableRect.Width - Math.Max(finalRightRectWidth, maxRightMargin);
double finalBottomRectHeight = bottomStack.desiredHeight + bottomStack.desiredMargin.Top + bottomStack.desiredMargin.Bottom;
double maxBottomMargin = Math.Max(leftStack.desiredMargin.Bottom, rightStack.desiredMargin.Bottom);
bottomRight.Y = availableRect.Height - Math.Max(finalBottomRectHeight, maxBottomMargin);
RadRect plotAreaRect = new RadRect(topLeft, bottomRight);
return(RadRect.Round(plotAreaRect));
}
protected virtual bool ShouldPlotPoint(DataPoint point)
{
var pointBounds = RadRect.Round(point.layoutSlot);
var plotBounds = this.model.layoutSlot;
var isWithinXPlot = pointBounds.X <= plotBounds.X + plotBounds.Width && pointBounds.X + pointBounds.Width >= plotBounds.X;
var isWithinYPlot = pointBounds.Y <= plotBounds.Y + plotBounds.Height && pointBounds.Y + pointBounds.Height >= plotBounds.Y;
if (isWithinXPlot && isWithinYPlot)
{
return(true);
}
var plotDirection = this.model.GetTypedValue <AxisPlotDirection>(AxisModel.PlotDirectionPropertyKey, AxisPlotDirection.Vertical);
// empty values
return((isWithinXPlot && double.IsNaN(point.layoutSlot.Y) && plotDirection == AxisPlotDirection.Vertical) ||
(isWithinYPlot && double.IsNaN(point.layoutSlot.X) && plotDirection == AxisPlotDirection.Horizontal));
}
