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Re: Windows emacs menu bar redraw


From: Andrew Choi
Subject: Re: Windows emacs menu bar redraw
Date: Fri, 05 Jul 2002 23:47:12 +0000 (GMT)
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3.50

address@hidden (Dave Schuyler) writes:

> Hi,
> 
> I'm using gnu emacs 21.2.1 on Windows 2000.
> 
> I've noticed that the menu bar will sometimes flicker and redraw.
> I've seen this before in applications where some controls are bing
> told to redraw themselves, not just as needed, but very often.  The
> programmer may miss a bug like this because the redraw is exactly
> the same as what was there before, and if it's fast enough, or if
> there is no blanking, you can't see it.  If your machine slows down
> with other tasks, the flicker can become bothersome.  Also, the
> redraw is needlessly using cpu time.  Worse, someone else may
> immitate the code doing the needless redraws, thinking that there is
> nothing broken with the original code.
> 
> Anyway, it would be nice if someone would take care of it.
> 
> Thanks.

Hi,

Does the problem go away if you call Fequal instead of EQ in w32menu.c
(set_frame_menubar) to check the previous_items array against
menu_items?

Andrew.



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