Re: OnIdle() and GUI problem

From:
"Tom Serface" <tom@camaswood.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Wed, 21 Oct 2009 06:37:05 -0700
Message-ID:
<1BF4C435-1DB9-4697-B117-6285642A3602@microsoft.com>
Yes, I always wondered about that as well. Seems like this feature would
have been more accessible. I've seen many articles over the years that show
ways to work around it.

Tom

"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message
news:brosd5dqlf2elo7fih8uhc90d84girbt6v@4ax.com...

And for reasons unknowable to ordinary mortals, it is in a non-"public"
header file,
afxpriv.h, which is supposed MFC "private" values.

Sadly, it is also undocumented.
joe

On Tue, 20 Oct 2009 13:49:39 -0700 (PDT), Ajay Kalra <ajaykalra@yahoo.com>
wrote:

On Oct 20, 1:48 pm, Joseph M. Newcomer <newco...@flounder.com> wrote:

A simple counter in the OnIdle handler will reveal that it is called
hundreds of thousands
of times in any brief execution.

Note that the reason OnIdle is called "on every mouse move" is that the
mouse message is
the only message in the queue, and OnIdle is called any time the queue
is empty and a
GetMessage would block.


Yes. A useful trick is to post a WM_KICKIDLE to call OnIdle if you
want to update the UI immediately due to some internal state change.

Joseph M. Newcomer [MVP]
email: newcomer@flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm

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