/// <summary>
/// Initializes all necessary data to draw all series for a column chart.
/// </summary>
internal void InitSeries()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
int seriesIndex = 0;
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
sri.LineFormat = Converter.ToXPen(sri.series.lineFormat, XColors.Black, ChartRenderer.DefaultSeriesLineWidth);
sri.FillFormat = Converter.ToXBrush(sri.series.fillFormat, ColumnColors.Item(seriesIndex++));
sri.pointRendererInfos = new ColumnRendererInfo[sri.series.seriesElements.Count];
for (int pointIdx = 0; pointIdx < sri.pointRendererInfos.Length; ++pointIdx)
{
PointRendererInfo pri = new ColumnRendererInfo();
Point point = sri.series.seriesElements[pointIdx];
pri.point = point;
if (point != null)
{
pri.LineFormat = sri.LineFormat;
pri.FillFormat = sri.FillFormat;
if (point.lineFormat != null && !point.lineFormat.color.IsEmpty)
{
pri.LineFormat = Converter.ToXPen(point.lineFormat, sri.LineFormat);
}
if (point.fillFormat != null && !point.fillFormat.color.IsEmpty)
{
pri.FillFormat = new XSolidBrush(point.fillFormat.color);
}
}
sri.pointRendererInfos[pointIdx] = pri;
}
}
}
/// <summary>
/// Determines the sum of the smallest and the largest stacked bar
/// from all series of the chart.
/// </summary>
protected override void CalcYAxis(out double yMin, out double yMax)
{
yMin = double.MaxValue;
yMax = double.MinValue;
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
int maxPoints = 0;
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
maxPoints = Math.Max(maxPoints, sri.series.seriesElements.Count);
}
for (int pointIdx = 0; pointIdx < maxPoints; ++pointIdx)
{
double valueSumPos = 0, valueSumNeg = 0;
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
if (sri.pointRendererInfos.Length <= pointIdx)
{
break;
}
ColumnRendererInfo column = (ColumnRendererInfo)sri.pointRendererInfos[pointIdx];
if (column.point != null && !double.IsNaN(column.point.value))
{
if (column.point.value < 0)
{
valueSumNeg += column.point.value;
}
else
{
valueSumPos += column.point.value;
}
}
}
yMin = Math.Min(valueSumNeg, yMin);
yMax = Math.Max(valueSumPos, yMax);
}
}
/// <summary>
/// Calculates the position, width and height of each column of all series.
/// </summary>
protected override void CalcColumns()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
if (cri.seriesRendererInfos.Length == 0)
{
return;
}
double xMin = cri.xAxisRendererInfo.MinimumScale;
double xMajorTick = cri.xAxisRendererInfo.MajorTick;
int maxPoints = 0;
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
maxPoints = Math.Max(maxPoints, sri.series.seriesElements.Count);
}
double x = xMin + xMajorTick / 2;
// Space used by one column.
double columnWidth = xMajorTick * 0.75 / 2;
XPoint[] points = new XPoint[2];
for (int pointIdx = 0; pointIdx < maxPoints; ++pointIdx)
{
// Set x to first clustered column for each series.
double yMin = 0, yMax = 0, y0 = 0, y1 = 0;
double x0 = x - columnWidth;
double x1 = x + columnWidth;
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
if (sri.pointRendererInfos.Length <= pointIdx)
{
break;
}
ColumnRendererInfo column = (ColumnRendererInfo)sri.pointRendererInfos[pointIdx];
if (column.point != null && !double.IsNaN(column.point.value))
{
double y = column.point.value;
if (y < 0)
{
y0 = yMin + y;
y1 = yMin;
yMin += y;
}
else
{
y0 = yMax;
y1 = yMax + y;
yMax += y;
}
points[0].X = x0; // upper left
points[0].Y = y1;
points[1].X = x1; // lower right
points[1].Y = y0;
cri.plotAreaRendererInfo.matrix.TransformPoints(points);
column.Rect = new XRect(points[0].X,
points[0].Y,
points[1].X - points[0].X,
points[1].Y - points[0].Y);
}
}
x++; // Next stacked column.
}
}