9-06-2012, see also current porting task list:
http://cadswes2.colorado.edu/~philw/2012/Qt4Port/ListsTables.html 

Qt4 Port: RplFrame ported from Q3ScrollView to Qt4 QScrollArea
Bug Number: none
Release notes (y/n): n
For Release Nums: 6.3

This was a very simple port because there was very little
application-level interaction at the 'Q3ScrollView' level.
Qt4 QScrollArea does require the application to provide the
underlying widget (to be 'scrolled') -- See the new class:

  class RplFrame::Canvas : public QWidget

There was a minor fix to the 'wrapping' (line-breaking)
computation.  The old Qt3 implemenation wasn't breaking 'soon
enough' -- sometimes obscuring on the right side when line-
breaking was available.  SEE comparative illustration:

  http://cadswes2.colorado.edu/~philw/2012/Qt4Port/RplFrame/2012-09-06/wrap.html

That demonstration code is available in the PhilQt4Port branch,
9-6-2012 commit:
  'Qt4 Port: RplFrame / Both Qt3 and Qt4 implementations DEMONSTRATED'
  '40b4b961e4d3c6e59306711837e1cecae93e7872'