Subject: bug#51490: Show an indicator when Emacs is busy somewhere in the Emacs window

From: Eli Zaretskii <[email-masked]>
Date: Wed, 21 Sep 2022 19:21:18 +0300

> Date: Wed, 21 Sep 2022 16:02:12 +0000
> From: Gregory Heytings <[email-masked]>
> cc: Lars Ingebrigtsen <[email-masked]>, [email-masked], 
>     [email-masked]
> 
> 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?