/// <summary>
/// Layouts and calculates the space used by the pie chart.
/// </summary>
internal override void Format()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
LegendRenderer lr = new PieLegendRenderer(this.rendererParms);
lr.Format();
// Calculate rects and positions.
XRect chartRect = LayoutLegend();
cri.plotAreaRendererInfo.Rect = chartRect;
double edge = Math.Min(chartRect.Width, chartRect.Height);
cri.plotAreaRendererInfo.X += (chartRect.Width - edge) / 2;
cri.plotAreaRendererInfo.Y += (chartRect.Height - edge) / 2;
cri.plotAreaRendererInfo.Width = edge;
cri.plotAreaRendererInfo.Height = edge;
DataLabelRenderer dlr = new PieDataLabelRenderer(this.rendererParms);
dlr.Format();
// Calculated remaining plot area, now it's safe to format.
PlotAreaRenderer renderer = GetPlotAreaRenderer();
renderer.Format();
dlr.CalcPositions();
}
