/// <summary>
/// Draws the data labels of the pie chart.
/// </summary>
internal override void Draw()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
if (cri.seriesRendererInfos.Length == 0)
{
return;
}
SeriesRendererInfo sri = cri.seriesRendererInfos[0];
if (sri.dataLabelRendererInfo == null)
{
return;
}
if (sri != null)
{
XGraphics gfx = this.rendererParms.Graphics;
XFont font = sri.dataLabelRendererInfo.Font;
XBrush fontColor = sri.dataLabelRendererInfo.FontColor;
XStringFormat format = XStringFormats.Center;
format.LineAlignment = XLineAlignment.Center;
foreach (DataLabelEntryRendererInfo dataLabel in sri.dataLabelRendererInfo.Entries)
{
if (dataLabel.Text != null)
{
gfx.DrawString(dataLabel.Text, font, fontColor, dataLabel.Rect, format);
}
}
}
}
/// <summary>
/// Draws all markers given in rendererInfo at the positions specified by points.
/// </summary>
private void DrawMarker(XGraphics graphics, XPoint[] points, SeriesRendererInfo rendererInfo)
{
foreach (XPoint pos in points)
{
MarkerRenderer.Draw(graphics, pos, rendererInfo.markerRendererInfo);
}
}
/// <summary>
/// Calculate angles for each sector.
/// </summary>
protected override void CalcSectors()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
if (cri.seriesRendererInfos.Length == 0)
{
return;
}
SeriesRendererInfo sri = cri.seriesRendererInfos[0];
double sumValues = sri.SumOfPoints;
if (sumValues == 0)
{
return;
}
double textMeasure = 0;
if (sri.dataLabelRendererInfo != null && sri.dataLabelRendererInfo.Position == DataLabelPosition.OutsideEnd)
{
foreach (DataLabelEntryRendererInfo dleri in sri.dataLabelRendererInfo.Entries)
{
textMeasure = Math.Max(textMeasure, dleri.Width);
textMeasure = Math.Max(textMeasure, dleri.Height);
}
}
XRect pieRect = cri.plotAreaRendererInfo.Rect;
if (textMeasure != 0)
{
pieRect.X += textMeasure;
pieRect.Y += textMeasure;
pieRect.Width -= 2 * textMeasure;
pieRect.Height -= 2 * textMeasure;
}
double startAngle = 270, sweepAngle = 0;
foreach (SectorRendererInfo sector in sri.pointRendererInfos)
{
if (!double.IsNaN(sector.point.value) && sector.point.value != 0)
{
sweepAngle = 360 / (sumValues / Math.Abs(sector.point.value));
sector.Rect = pieRect;
sector.StartAngle = startAngle;
sector.SweepAngle = sweepAngle;
startAngle += sweepAngle;
}
else
{
sector.StartAngle = double.NaN;
sector.SweepAngle = double.NaN;
}
}
}
/// <summary>
/// Initializes the legend's renderer info. Each data point will be represented through
/// a legend entry renderer info.
/// </summary>
internal override RendererInfo Init()
{
LegendRendererInfo lri = null;
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
if (cri.chart.legend != null)
{
lri = new LegendRendererInfo();
lri.legend = cri.chart.legend;
lri.Font = Converter.ToXFont(lri.legend.font, cri.DefaultFont);
lri.FontColor = new XSolidBrush(XColors.Black);
if (lri.legend.lineFormat != null)
{
lri.BorderPen = Converter.ToXPen(lri.legend.lineFormat, XColors.Black, DefaultLineWidth, XDashStyle.Solid);
}
XSeries xseries = null;
if (cri.chart.xValues != null)
{
xseries = cri.chart.xValues[0];
}
int index = 0;
SeriesRendererInfo sri = cri.seriesRendererInfos[0];
lri.Entries = new LegendEntryRendererInfo[sri.pointRendererInfos.Length];
foreach (PointRendererInfo pri in sri.pointRendererInfos)
{
LegendEntryRendererInfo leri = new LegendEntryRendererInfo();
leri.seriesRendererInfo = sri;
leri.legendRendererInfo = lri;
leri.EntryText = string.Empty;
if (xseries != null)
{
if (xseries.Count > index)
{
leri.EntryText = xseries[index].Value;
}
}
else
{
leri.EntryText = (index + 1).ToString(CultureInfo.InvariantCulture); // create default/dummy entry
}
leri.MarkerPen = pri.LineFormat;
leri.MarkerBrush = pri.FillFormat;
lri.Entries[index++] = leri;
}
}
return(lri);
}
/// <summary>
/// Initializes all necessary data to draw series for a combination chart.
/// </summary>
private void InitSeriesRendererInfo()
{
CombinationRendererInfo cri = (CombinationRendererInfo)this.rendererParms.RendererInfo;
SeriesCollection seriesColl = cri.chart.SeriesCollection;
cri.seriesRendererInfos = new SeriesRendererInfo[seriesColl.Count];
for (int idx = 0; idx < seriesColl.Count; ++idx)
{
SeriesRendererInfo sri = new SeriesRendererInfo();
sri.series = seriesColl[idx];
cri.seriesRendererInfos[idx] = sri;
}
}
/// <summary>
/// Initializes all necessary data to draw all series for a column chart.
/// </summary>
private void InitSeriesRendererInfo()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
SeriesCollection seriesColl = cri.chart.SeriesCollection;
cri.seriesRendererInfos = new SeriesRendererInfo[seriesColl.Count];
// Lowest series is the first, like in Excel
for (int idx = 0; idx < seriesColl.Count; ++idx)
{
SeriesRendererInfo sri = new SeriesRendererInfo();
sri.series = seriesColl[idx];
cri.seriesRendererInfos[idx] = sri;
}
InitSeries();
}
/// <summary>
/// Calculates the space used by the data labels.
/// </summary>
internal override void Format()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
if (cri.seriesRendererInfos.Length == 0)
{
return;
}
SeriesRendererInfo sri = cri.seriesRendererInfos[0];
if (sri.dataLabelRendererInfo == null)
{
return;
}
double sumValues = sri.SumOfPoints;
XGraphics gfx = this.rendererParms.Graphics;
sri.dataLabelRendererInfo.Entries = new DataLabelEntryRendererInfo[sri.pointRendererInfos.Length];
int index = 0;
foreach (SectorRendererInfo sector in sri.pointRendererInfos)
{
DataLabelEntryRendererInfo dleri = new DataLabelEntryRendererInfo();
if (sri.dataLabelRendererInfo.Type != DataLabelType.None)
{
if (sri.dataLabelRendererInfo.Type == DataLabelType.Percent)
{
double percent = 100 / (sumValues / Math.Abs(sector.point.value));
dleri.Text = percent.ToString(sri.dataLabelRendererInfo.Format) + "%";
}
else if (sri.dataLabelRendererInfo.Type == DataLabelType.Value)
{
dleri.Text = sector.point.value.ToString(sri.dataLabelRendererInfo.Format);
}
if (dleri.Text.Length > 0)
{
dleri.Size = gfx.MeasureString(dleri.Text, sri.dataLabelRendererInfo.Font);
}
}
sri.dataLabelRendererInfo.Entries[index++] = dleri;
}
}
/// <summary>
/// Initializes all necessary data to draw a series for a pie chart.
/// </summary>
protected void InitSeries(ChartRendererInfo rendererInfo)
{
SeriesCollection seriesColl = rendererInfo.chart.SeriesCollection;
rendererInfo.seriesRendererInfos = new SeriesRendererInfo[seriesColl.Count];
for (int idx = 0; idx < seriesColl.Count; ++idx)
{
SeriesRendererInfo sri = new SeriesRendererInfo();
rendererInfo.seriesRendererInfos[idx] = sri;
sri.series = seriesColl[idx];
sri.LineFormat = Converter.ToXPen(sri.series.lineFormat, XColors.Black, ChartRenderer.DefaultSeriesLineWidth);
sri.FillFormat = Converter.ToXBrush(sri.series.fillFormat, ColumnColors.Item(idx));
sri.pointRendererInfos = new SectorRendererInfo[sri.series.seriesElements.Count];
for (int pointIdx = 0; pointIdx < sri.pointRendererInfos.Length; ++pointIdx)
{
PointRendererInfo pri = new SectorRendererInfo();
Point point = sri.series.seriesElements[pointIdx];
pri.point = point;
if (point != null)
{
pri.LineFormat = sri.LineFormat;
if (point.lineFormat != null && !point.lineFormat.color.IsEmpty)
{
pri.LineFormat = new XPen(point.lineFormat.color);
}
if (point.fillFormat != null && !point.fillFormat.color.IsEmpty)
{
pri.FillFormat = new XSolidBrush(point.fillFormat.color);
}
else
{
pri.FillFormat = new XSolidBrush(PieColors.Item(pointIdx));
}
pri.LineFormat.LineJoin = XLineJoin.Round;
}
sri.pointRendererInfos[pointIdx] = pri;
}
}
}
/// <summary>
/// Draws the content of the pie plot area.
/// </summary>
internal override void Draw()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
XRect plotAreaRect = cri.plotAreaRendererInfo.Rect;
if (plotAreaRect.IsEmpty)
{
return;
}
if (cri.seriesRendererInfos.Length == 0)
{
return;
}
XGraphics gfx = this.rendererParms.Graphics;
XGraphicsState state = gfx.Save();
// Draw sectors.
SeriesRendererInfo sri = cri.seriesRendererInfos[0];
foreach (SectorRendererInfo sector in sri.pointRendererInfos)
{
if (!double.IsNaN(sector.StartAngle) && !double.IsNaN(sector.SweepAngle))
{
gfx.DrawPie(sector.FillFormat, sector.Rect, sector.StartAngle, sector.SweepAngle);
}
}
// Draw border of the sectors.
foreach (SectorRendererInfo sector in sri.pointRendererInfos)
{
if (!double.IsNaN(sector.StartAngle) && !double.IsNaN(sector.SweepAngle))
{
gfx.DrawPie(sector.LineFormat, sector.Rect, sector.StartAngle, sector.SweepAngle);
}
}
gfx.Restore(state);
}
/// <summary>
/// Calculate angles for each sector.
/// </summary>
protected override void CalcSectors()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
if (cri.seriesRendererInfos.Length == 0)
{
return;
}
SeriesRendererInfo sri = cri.seriesRendererInfos[0];
double sumValues = sri.SumOfPoints;
if (sumValues == 0)
{
return;
}
double textMeasure = 0;
if (sri.dataLabelRendererInfo != null && sri.dataLabelRendererInfo.Position == DataLabelPosition.OutsideEnd)
{
foreach (DataLabelEntryRendererInfo dleri in sri.dataLabelRendererInfo.Entries)
{
textMeasure = Math.Max(textMeasure, dleri.Width);
textMeasure = Math.Max(textMeasure, dleri.Height);
}
}
XRect pieRect = cri.plotAreaRendererInfo.Rect;
if (textMeasure != 0)
{
pieRect.X += textMeasure;
pieRect.Y += textMeasure;
pieRect.Width -= 2 * textMeasure;
pieRect.Height -= 2 * textMeasure;
}
XPoint origin = new XPoint(pieRect.X + pieRect.Width / 2, pieRect.Y + pieRect.Height / 2);
XRect innerRect = new XRect();
XPoint p1 = new XPoint();
double midAngle = 0, sectorStartAngle = 0, sectorSweepAngle = 0,
deltaAngle = 2, startAngle = 270, sweepAngle = 0,
rInnerCircle = pieRect.Width / 15,
rOuterCircle = pieRect.Width / 2;
foreach (SectorRendererInfo sector in sri.pointRendererInfos)
{
if (!double.IsNaN(sector.point.value) && sector.point.value != 0)
{
sweepAngle = 360 / (sumValues / Math.Abs(sector.point.value));
midAngle = startAngle + sweepAngle / 2;
sectorStartAngle = Math.Max(0, startAngle + deltaAngle);
sectorSweepAngle = Math.Max(sweepAngle, sweepAngle - deltaAngle);
p1.X = origin.X + rInnerCircle * Math.Cos(midAngle / 180 * Math.PI);
p1.Y = origin.Y + rInnerCircle * Math.Sin(midAngle / 180 * Math.PI);
innerRect.X = p1.X - rOuterCircle + rInnerCircle;
innerRect.Y = p1.Y - rOuterCircle + rInnerCircle;
innerRect.Width = (rOuterCircle - rInnerCircle) * 2;
innerRect.Height = innerRect.Width;
sector.Rect = innerRect;
sector.StartAngle = sectorStartAngle;
sector.SweepAngle = sectorSweepAngle;
startAngle += sweepAngle;
}
else
{
sector.StartAngle = double.NaN;
sector.SweepAngle = double.NaN;
}
}
}
/// <summary>
/// Calculates the data label positions specific for pie charts.
/// </summary>
internal override void CalcPositions()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
XGraphics gfx = this.rendererParms.Graphics;
if (cri.seriesRendererInfos.Length > 0)
{
SeriesRendererInfo sri = cri.seriesRendererInfos[0];
if (sri != null && sri.dataLabelRendererInfo != null)
{
int sectorIndex = 0;
foreach (SectorRendererInfo sector in sri.pointRendererInfos)
{
// Determine output rectangle
double midAngle = sector.StartAngle + sector.SweepAngle / 2;
double radMidAngle = midAngle / 180 * Math.PI;
XPoint origin = new XPoint(sector.Rect.X + sector.Rect.Width / 2,
sector.Rect.Y + sector.Rect.Height / 2);
double radius = sector.Rect.Width / 2;
double halfradius = radius / 2;
DataLabelEntryRendererInfo dleri = sri.dataLabelRendererInfo.Entries[sectorIndex++];
switch (sri.dataLabelRendererInfo.Position)
{
case DataLabelPosition.OutsideEnd:
// Outer border of the circle.
dleri.X = origin.X + (radius * Math.Cos(radMidAngle));
dleri.Y = origin.Y + (radius * Math.Sin(radMidAngle));
if (dleri.X < origin.X)
{
dleri.X -= dleri.Width;
}
if (dleri.Y < origin.Y)
{
dleri.Y -= dleri.Height;
}
break;
case DataLabelPosition.InsideEnd:
// Inner border of the circle.
dleri.X = origin.X + (radius * Math.Cos(radMidAngle));
dleri.Y = origin.Y + (radius * Math.Sin(radMidAngle));
if (dleri.X > origin.X)
{
dleri.X -= dleri.Width;
}
if (dleri.Y > origin.Y)
{
dleri.Y -= dleri.Height;
}
break;
case DataLabelPosition.Center:
// Centered
dleri.X = origin.X + (halfradius * Math.Cos(radMidAngle));
dleri.Y = origin.Y + (halfradius * Math.Sin(radMidAngle));
dleri.X -= dleri.Width / 2;
dleri.Y -= dleri.Height / 2;
break;
case DataLabelPosition.InsideBase:
// Aligned at the base/center of the circle
dleri.X = origin.X;
dleri.Y = origin.Y;
if (dleri.X < origin.X)
{
dleri.X -= dleri.Width;
}
if (dleri.Y < origin.Y)
{
dleri.Y -= dleri.Height;
}
break;
}
}
}
}
}
