[vtkusers] Magnify Glass

[Kenneth Porter]

--On Thursday, January 28, 2010 10:04 AM -0500 Karthik Krishnan 
<karthik.krishnan at kitware.com> wrote:

> There are other not-directly but similar examples in VTK. See the
> vtkAxesActor for instance. It creates an overlay renderer and places
> the axes prop on a corner of the render window. It shares the same
> camera of course deliberately so as to have the orientation reflect
> that of the scene, but you needn't.

Is there a similar actor that can display a color bar showing 
correspondence between colors and scalar values?