void vtkfig::XYPlot::PlotGrid ( )
private
Plot the label grid.
Definition at line 317 of file vtkfigXYPlot.cxx.
   {
     if (PlotState.grid_show)
     {
       double xrange[2];
       double yrange[2];
       int mynxlabels;
       int mynylabels;
       
 
       // nice to have but not with opengl2
       // https://gitlab.kitware.com/vtk/vtk/issues/15799
       XYPlotActor->GetProperty()->SetLineStipplePattern(0xf0f0);
       XYPlotActor->GetProperty()->SetLineStippleRepeatFactor(5);
 
 
       if (PlotState.adjust_labels)
       {
         XYPlotActor->GetXAxisActor2D()->GetAdjustedRange(xrange);
         XYPlotActor->GetYAxisActor2D()->GetAdjustedRange(yrange);
         mynxlabels=XYPlotActor->GetXAxisActor2D()->GetAdjustedNumberOfLabels();
         mynylabels=XYPlotActor->GetYAxisActor2D()->GetAdjustedNumberOfLabels();
       }
       else
       {
         XYPlotActor->GetXRange(xrange);
         XYPlotActor->GetYRange(yrange);
         mynxlabels=XYPlotActor->GetNumberOfXLabels();
         mynylabels=XYPlotActor->GetNumberOfYLabels();
       }
 
       // The number of grid lines can change, so there may be more or less
       // of them in a new plot. We however keep the once allocated vectors
       // and have to extend them if they are too short.
       // If they are too long , we switch off the superfluous ones
       // (via the second argument in SetPlotLines())
 
       for (int i=XGridLines.size();i<mynxlabels; i++)
         XGridLines.emplace_back(XYPlotActor, num_curves,PlotState.grid_rgb);
       
       for (int i=YGridLines.size();i<mynylabels; i++)
         YGridLines.emplace_back(XYPlotActor, num_curves,PlotState.grid_rgb);
       
 
       double dx=0.999999*(xrange[1]-xrange[0])/(mynxlabels-1);
       double x=xrange[0]+dx;
       for (int i=1;i<mynxlabels;i++,x+=dx)
       {
         XGridLines[i].SetXLine(yrange,x);
         XYPlotActor->SetPlotLines(XGridLines[i].GetDataSetNumber(), 1);
       }
       for (int i=mynxlabels;i<XGridLines.size();i++)
       {
         XYPlotActor->SetPlotLines(XGridLines[i].GetDataSetNumber(), 0);
       }
 
       
       double dy=0.9999999*(yrange[1]-yrange[0])/(mynylabels-1);
       double y=yrange[0]+dy;
       for (int i=1;i<mynylabels;i++,y+=dy)
       {
         YGridLines[i].SetYLine(xrange,y);
         XYPlotActor->SetPlotLines(YGridLines[i].GetDataSetNumber(), 1);
       }
       for (int i=mynylabels;i<XGridLines.size();i++)
       {
         XYPlotActor->SetPlotLines(YGridLines[i].GetDataSetNumber(), 0);
       }
       
     }
   }
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