CGraphicalListener(iNumberOfAxes, caLabels, caLabelUnits)
 iNumberOfAxes - number of plots 
  caLabels - labels of actual axes on the plots
  one can have for example an single plot (iNumberOfAxes = 1)
  with energy and position caLabels = {'energy', 'position'}
  or two axes (like default behaviour of C3DVisualizerListener)
  (iNumberOfAxes = 2) sharing dimensions like 'X', 'Y', 'T'
 
  example
  CGraphicalListener(2, {'T', 'XY'}, {'s', 'm'})
  CGraphicalListener(2, {'T', 'XY'}, {'fs', '\mu m'})