public void PaintOneRange(Graphics g, IPlotArea layer, IPlotRange range, Processed2DPlotData pdata)
{
if (this._labelColumnProxy.Document == null)
return;
_cachedStringFormat.Alignment = GdiExtensionMethods.ToGdi(_alignmentX);
_cachedStringFormat.LineAlignment = GdiExtensionMethods.ToGdi(_alignmentY);
if (null != _attachedPlane)
_attachedPlane = layer.UpdateCSPlaneID(_attachedPlane);
var ptArray = pdata.PlotPointsInAbsoluteLayerCoordinates;
Altaxo.Data.IReadableColumn labelColumn = this._labelColumnProxy.Document;
bool isUsingVariableColorForLabelText = null != _cachedColorForIndexFunction && IsColorReceiver;
bool isUsingVariableColorForLabelBackground = null != _cachedColorForIndexFunction &&
(null != _backgroundStyle && _backgroundStyle.SupportsBrush && (_backgroundColorLinkage == ColorLinkage.Dependent || _backgroundColorLinkage == ColorLinkage.PreserveAlpha));
bool isUsingVariableColor = isUsingVariableColorForLabelText || isUsingVariableColorForLabelBackground;
BrushX clonedTextBrush = null;
BrushX clonedBackBrush = null;
if (isUsingVariableColorForLabelText)
clonedTextBrush = _brush.Clone();
if (isUsingVariableColorForLabelBackground)
clonedBackBrush = _backgroundStyle.Brush.Clone();
// save the graphics stat since we have to translate the origin
var gs = g.Save();
double xpos = 0, ypos = 0;
double xpre, ypre;
double xdiff, ydiff;
bool isFormatStringContainingBraces = _labelFormatString?.IndexOf('{') >= 0;
var culture = System.Threading.Thread.CurrentThread.CurrentCulture;
bool mustUseLogicalCoordinates = null != this._attachedPlane || 0 != _cachedLogicalShiftX || 0 != _cachedLogicalShiftY;
int lower = range.LowerBound;
int upper = range.UpperBound;
for (int j = lower; j < upper; j+=_skipFrequency)
{
int originalRowIndex = range.GetOriginalRowIndexFromPlotPointIndex(j);
string label;
if (string.IsNullOrEmpty(_labelFormatString))
{
label = labelColumn[originalRowIndex].ToString();
}
else if (!isFormatStringContainingBraces)
{
label = labelColumn[originalRowIndex].ToString(_labelFormatString, culture);
}
else
{
// the label format string can contain {0} for the label column item, {1} for the row index, {2} .. {4} for the x, y and z component of the data point
label = string.Format(_labelFormatString, labelColumn[originalRowIndex], originalRowIndex, pdata.GetPhysical(0, originalRowIndex), pdata.GetPhysical(1, originalRowIndex), pdata.GetPhysical(2, originalRowIndex));
}
if (string.IsNullOrEmpty(label))
continue;
double localSymbolSize = _symbolSize;
if (null != _cachedSymbolSizeForIndexFunction)
{
localSymbolSize = _cachedSymbolSizeForIndexFunction(originalRowIndex);
}
double localFontSize = _fontSizeOffset + _fontSizeFactor * localSymbolSize;
if (!(localFontSize > 0))
continue;
_font = _font.WithSize(localFontSize);
// Start of preparation of brushes, if a variable color is used
if (isUsingVariableColor)
{
Color c = _cachedColorForIndexFunction(originalRowIndex);
if (isUsingVariableColorForLabelText)
{
clonedTextBrush.Color = new NamedColor(AxoColor.FromArgb(c.A, c.R, c.G, c.B), "e");
}
if (isUsingVariableColorForLabelBackground)
{
if (_backgroundColorLinkage == ColorLinkage.PreserveAlpha)
clonedBackBrush.Color = new NamedColor(AxoColor.FromArgb(clonedBackBrush.Color.Color.A, c.R, c.G, c.B), "e");
else
clonedBackBrush.Color = new NamedColor(AxoColor.FromArgb(c.A, c.R, c.G, c.B), "e");
}
}
// end of preparation of brushes for variable colors
if (mustUseLogicalCoordinates) // we must use logical coordinates because either there is a shift of logical coordinates, or an attached plane
{
Logical3D r3d = layer.GetLogical3D(pdata, originalRowIndex);
r3d.RX += _cachedLogicalShiftX;
r3d.RY += _cachedLogicalShiftY;
if (null != this._attachedPlane)
{
var pp = layer.CoordinateSystem.GetPointOnPlane(this._attachedPlane, r3d);
xpre = pp.X;
ypre = pp.Y;
}
else
{
PointD3D pt;
layer.CoordinateSystem.LogicalToLayerCoordinates(r3d, out xpre, out ypre);
}
}
else // no shifting, thus we can use layer coordinates
{
xpre = ptArray[j].X;
ypre = ptArray[j].Y;
}
xdiff = xpre - xpos;
ydiff = ypre - ypos;
xpos = xpre;
ypos = ypre;
g.TranslateTransform((float)xdiff, (float)ydiff);
if (this._rotation != 0)
g.RotateTransform((float)-this._rotation);
this.PaintOneItem(g, label, localSymbolSize, clonedTextBrush, clonedBackBrush);
if (this._rotation != 0)
g.RotateTransform((float)this._rotation);
}
g.Restore(gs); // Restore the graphics state
}