GNU bug report logs - #51490
Show an indicator when Emacs is busy somewhere in the Emacs window

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Message #47 received at 51490 <at> debbugs.gnu.org (full text, mbox):

From: Gregory Heytings <gregory <at> heytings.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: larsi <at> gnus.org, stefan <at> marxist.se, 51490 <at> debbugs.gnu.org
Subject: Re: bug#51490: Show an indicator when Emacs is busy somewhere in
 the Emacs window
Date: Wed, 21 Sep 2022 17:11:17 +0000

>> On GUI frames, can't we do something similar to what we do for fringe 
>> bitmaps?
>
> I'm not sure I follow.  Fringe bitmaps are drawn by redisplay, and they 
> do access faces, text properties, overlays,...  So how would this solve 
> the problem?
>

Aren't they the simplest graphical element drawn by Emacs, a simple 
black-and-white bitmap?  I don't think a "busy" indicator would have to 
access faces, text properties and overlays, it could be a simple (list of) 
black-and-white bitmaps drawn at a fixed position, e.g. on the left of the 
mode line.  The interaction with Lisp would be minimal.

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