enthought/enable — pull request #78 by pberkes (2012-11-28 15:16:05+00:00)
Title: FIX the size of the scroll bar for Qt4

The maximum value of a QScrollBar is the maximum position of the
scroll bar, not the document length. We need to subtract the length
of the scroll bar itself.

See for example the examples/scrolled_demo.py before and after
the fix.