[gtkmm] Another Events problem

[Phillip Neiswanger <sigsegv prodigy net>]

In this program the main working widget is a drawingarea.  It is contained 
in a frame.  At certain points it makes sense to allow the user to split 
this widget.  I wrote some code that would remove the drawingarea from the 
frame, construct 2 new drawingarea widgets and place them in a vertical or 
horizontal paned widget, then add the paned widget to the frame and delete 
the original drawingarea.  That code works and when I split the original 
drawingarea it generates the 2 paned drawingareas.  Unfortunately, the new 
drawingareas no longer get any events even though the code to set up the 
events is the same.  I tried setting the events and focus parameters in 
the paned widget, but that doesn't help.  Then it occured to me that the 
paned widget might be a windowless widget, so I created an EventBox and 
stuffed the paned widget in it and added the eventbox to the frame instead 
of the paned widget.  So far I can't get that code to work.  It just hangs 
the program.  I don't really care about that because what I really want to 
know is the following.

What am I missing?  Why don't the drawingareas get events when I put them 
in a paned widget?  Is there some parameter I need to set in the paned 
widget, or do I simple need to get the eventbox code working?

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