Exposure handling

CLX Lispers,

This may or may not be a problem, but it's one of those things that 
bothers me.  I seem to get too many expose events when I put up a screen.

For instance, if I do a list box with ten items I seem to get more than 
ten exposures for the main listbox window.   This could be normal, or it 
could be because of the design of my code.   The layout manager I'm 
designing calls for the listbox main window to be sized and exposed 
before the item windows, which seems to be a different approach from 
what I've seen done elsewhere.   Is this a real problem and is it 
causing the multiple exposures?   (It would seem that it is)   If so, is 
there a way to stop the multiple exposures?   Is there an accepted (or 
required) order in which things should be done?   Or should I just 
ignore the multiple exposures?   (The screen  looks and works fine)

Obviously, I can change my code to do the sizing and placement before 
any exposures are done if that's what's required.     What I don't know 
is how many exposures there are supposed to be in a widget made up of 
multiple parts or, in fact, how the multiple part widget should be 
constructed, mapped, and exposed in the first place.

Bill

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