/ . / CGLtk / Histogram.py / HistogramMarker 

a marker on a histogram

Should only be created (or destroyed) with methods of a HistogramMarkers instance. See that class's doc string for details.

The only options relevant externally are rgba and xy. xy should be treated as if it were read-only (use HistogramMarkers methods to delete/add a marker if it is necessary to get one to "move" programatically). xy values will depend on HistogramMarkers' coordtype option.

__init__ (
        self,
        parent=None,
        **kw,
        )

__cmp__ ( self,  other )