matplotlib/matplotlib — pull request #539 by efiring (2011-10-18 18:33:34+00:00)
Title: Qt4agg draw

This is the latest in a series of modifications to the Qt4Agg
drawing strategy going back several years. It simplifies the
code and should solve the problem introduced in 6938b0025; that
is, delaying the Agg draw operation until the paintEvent breaks
code expecting the draw operation to have occurred immediately.
The problem was reported here:
http://sourceforge.net/mailarchive/message.php?msg_id=28245744