public override void DrawChartData()
{
// calculate the number of rows and columns
ChartModel model = Model;
double [,] yValues = model.YValues;
int yValueCount = yValues.GetUpperBound(0) + 1;
string[] groupLabels = model.GroupLabels;
int groupCount = (groupLabels != null)?groupLabels.Length:1;
int nCols = (int)Math.Ceiling(Math.Sqrt(yValueCount)),
nRows = (int)Math.Round(Math.Sqrt(yValueCount));
double dx = MarginLeft, dy = MarginTop;
double quadWidth = (ChartCanvas.Width - MarginLeft - MarginRight) / (double)nCols;
// We do not need any gap for 3D pie chart because of the vertical scaling
double vGap = IsPerspective?0:2.0 * _TEXT_MARGIN;
double quadHeight = (ChartCanvas.Height - MarginTop - MarginBottom - (nRows - 1) * vGap) / (double)nRows;
LookAndFeel lf = CurrentLookAndFeel;
string labelXAML = lf.GetGroupLabelXAML();
TextBlock labelElem = null;
for (int i = 0; i < nRows; ++i)
{
for (int j = 0; j < nCols; ++j)
{
int iGroup = (groupLabels != null)?(i * nCols + j):(-1);
if (iGroup >= yValueCount)
{
break;
}
string groupLabel = (iGroup == -1)?null:groupLabels[iGroup];
Canvas fnlContainer = new Canvas();
ChartCanvas.Children.Add(fnlContainer);
double newHeight = DrawGroupLabelTitle(groupLabel, ChartCanvas, labelXAML, ref labelElem,
dx, dy, quadWidth, quadHeight);
double newWidth = quadWidth - 2 * _TEXT_MARGIN;
TranslateTransform transform = new TranslateTransform();
if (IsPerspective)
{
// Top ring has a height of 1/6 that of the width. So we need to compensate for half of it.
newHeight -= newWidth / 6;
_drawPerspectiveFunnel(fnlContainer, newWidth, newHeight, iGroup);
transform.X = (dx + _TEXT_MARGIN);
transform.Y = (dy + newWidth / 12);
}
else
{
_drawFunnel(fnlContainer, newWidth, newHeight, iGroup);
transform.X = dx + _TEXT_MARGIN;
transform.Y = dy;
}
fnlContainer.RenderTransform = transform;
dx += quadWidth;
}
dx = MarginLeft;
dy += quadHeight + vGap;
}
}
