Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!snorkelwacker!bloom-beacon!EXPO.LCS.MIT.EDU!kit
From: kit@EXPO.LCS.MIT.EDU (Chris D. Peterson)
Newsgroups: comp.windows.x
Subject: Re: Set Values Widget Routine
Message-ID: <9006061556.AA26804@expo.lcs.mit.edu>
Date: 6 Jun 90 15:56:46 GMT
References: <100920227@hpcvlx.cv.hp.com>
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 20


> > ... I can't figure out who is doing the erasing.

> The XtSetValues routine calls XClearArea on the widget.  It's kind of a
> simplistic way to generate a "safe" expose on the widget.

Slight clarification:

If a widget's SetValues method (or any of its ancestors SetValues methods since
this is a chained class method) returns TRUE the intrinsics will clear the
widget's window, and generate an exposure event for that window.  I will refer
you to the Intrinsics specification, section 9.7.2.1 paragraph 10, for further
details.

						Chris D. Peterson     
						MIT X Consortium 

Net:	 kit@expo.lcs.mit.edu
Phone:   (617) 253 - 9608	
Address: MIT - Room NE43-213