/// <summary>
/// Calculates the data label positions specific for column charts.
/// </summary>
internal override void CalcPositions()
{
ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
XGraphics gfx = _rendererParms.Graphics;
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
if (sri._dataLabelRendererInfo == null)
{
continue;
}
int columnIndex = 0;
foreach (ColumnRendererInfo bar in sri._pointRendererInfos)
{
DataLabelEntryRendererInfo dleri = sri._dataLabelRendererInfo.Entries[columnIndex++];
dleri.Y = bar.Rect.Y + (bar.Rect.Height - dleri.Height) / 2; // Always the same...
switch (sri._dataLabelRendererInfo.Position)
{
case DataLabelPosition.InsideEnd:
// Inner border of the column.
dleri.X = bar.Rect.X;
if (bar.Point._value > 0)
{
dleri.X += bar.Rect.Width - dleri.Width;
}
break;
case DataLabelPosition.Center:
// Centered inside the column.
dleri.X = bar.Rect.X + (bar.Rect.Width - dleri.Width) / 2;
break;
case DataLabelPosition.InsideBase:
// Aligned at the base of the column.
dleri.X = bar.Rect.X;
if (bar.Point._value < 0)
{
dleri.X += bar.Rect.Width - dleri.Width;
}
break;
case DataLabelPosition.OutsideEnd:
// Outer border of the column.
dleri.X = bar.Rect.X;
if (bar.Point._value > 0)
{
dleri.X += bar.Rect.Width;
}
else
{
dleri.X -= dleri.Width;
}
break;
}
}
}
}
/// <summary>
/// Calculates the space used by the data labels.
/// </summary>
internal override void Format()
{
ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
if (cri.seriesRendererInfos.Length == 0)
{
return;
}
SeriesRendererInfo sri = cri.seriesRendererInfos[0];
if (sri._dataLabelRendererInfo == null)
{
return;
}
double sumValues = sri.SumOfPoints;
XGraphics gfx = _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>
/// Calculates the space used by the data labels.
/// </summary>
internal override void Format()
{
ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
if (sri._dataLabelRendererInfo == null)
{
continue;
}
XGraphics gfx = _rendererParms.Graphics;
sri._dataLabelRendererInfo.Entries = new DataLabelEntryRendererInfo[sri._pointRendererInfos.Length];
int index = 0;
foreach (ColumnRendererInfo column in sri._pointRendererInfos)
{
DataLabelEntryRendererInfo dleri = new DataLabelEntryRendererInfo();
if (sri._dataLabelRendererInfo.Type != DataLabelType.None)
{
if (sri._dataLabelRendererInfo.Type == DataLabelType.Value)
{
dleri.Text = column.Point._value.ToString(sri._dataLabelRendererInfo.Format);
}
else if (sri._dataLabelRendererInfo.Type == DataLabelType.Percent)
{
throw new InvalidOperationException(PSCSR.PercentNotSupportedByColumnDataLabel);
}
if (dleri.Text.Length > 0)
{
dleri.Size = gfx.MeasureString(dleri.Text, sri._dataLabelRendererInfo.Font);
}
}
sri._dataLabelRendererInfo.Entries[index++] = dleri;
}
}
CalcPositions();
}
/// <summary>
/// Calculates the data label positions specific for pie charts.
/// </summary>
internal override void CalcPositions()
{
ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
XGraphics gfx = _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;
}
}
}
}
}
