Path: utzoo!attcan!uunet!snorkelwacker!bloom-beacon!EXPO.LCS.MIT.EDU!keith
From: keith@EXPO.LCS.MIT.EDU (Keith Packard)
Newsgroups: comp.windows.x
Subject: Re: Resize and expose event in Xt
Message-ID: <9010131657.AA00990@xenon.lcs.mit.edu>
Date: 13 Oct 90 16:57:54 GMT
References: <9010130358.AA11381@Larry.McRCIM.McGill.EDU>
Sender: root@athena.mit.edu (Wizard A. Root)
Organization: The Internet
Lines: 12


> Not necessarily; if a window is shrunk you will not necessarily get an
> Expose.  After all, no part of the window is visible that wasn't
> visible before.

By looking at the CreateWindow request, you'll notice that the default
bit-gravity for a window is Forget.  Unless the application specifically sets
it to something else, everytime the window is resized, it will get exposure
events, even if the window has backing-store (see the ConfigureWindow request).

A better to track resize would obviously be to select for StructureNotify and
pay attention to ConfigureNotify events.