[vtkusers] Scalar bar with discrete values

[Karl Merkley]

I have a set of discrete values (thicknesses) that I want to describe with a scalar bar.   Each color has exactly one value associated with it.   When I set up my scalar bar it has a range defined by each color.    Is there a way to get a single label drawn at the center of the color range instead of labels at the tops and bottoms of each range?

  Thanks, 
     Karl