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Re: frame visibility wrong after redisplay
From: |
Stefan Monnier |
Subject: |
Re: frame visibility wrong after redisplay |
Date: |
Thu, 21 May 2009 10:23:40 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.93 (gnu/linux) |
> I'm still trying to fix #3303, and the problem I am seeing now is that
> FRAME_VISIBLE_P returns the wrong value.
> In the NS port, but not on GNU/Linux (or perhaps X), I get the following
> behavior when evaluating this expression:
> (let ((f (selected-frame)))
> (make-frame)
> (make-frame-invisible f t)
> (setq aa2v (frame-visible-p f))
> (redisplay)
> (setq aa3v (frame-visible-p f)))
> (list aa2v aa3v) is, surprisingly, '(nil t).
> Why is the frame deemed visible after the redisplay when it is, in
> fact, invisible?
> What should I look for here?
> I think drawrect: is called for the view of that frame, which sets
> async_visible (unclear why that's done there). Why?
> This is what's causing much pain somewhere else where we need to decide how
> to correctly raise it.
If you run under GDB, you should be able to place a watchpoint on the
`visible' (and `async_visible') field of frame `f', so you'll be
immediately told when those fields change. The backtraces at those
times should give us a good indication of when/where the visibility is
incorrectly set back to t.
Stefan