From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Juri Linkov <juri@jurta.org>
Cc: 17439@debbugs.gnu.org
Subject: bug#17439: 24.3.50; run-with-idle-timer runs on focus-out
Date: Sun, 11 May 2014 18:29:19 -0400 [thread overview]
Message-ID: <jwvk39s3qs7.fsf-monnier+emacsbugs@gnu.org> (raw)
In-Reply-To: <87r440gfhf.fsf@mail.jurta.org> (Juri Linkov's message of "Mon, 12 May 2014 00:31:48 +0300")
>> Huh? `run-with-idle-timer' is not supposed to generate any event.
> It runs on `focus-out',
It does. But that doesn't mean that "`run-with-idle-timer' generates
the `focus-out'". The `focus-out' event is generated by the
window-manager plus Emacs's C code in response to some situation such as
a user action. And after execution of the command bound to `focus-out',
we run the idle timers.
> (defun test () (message "%S" last-input-event))
> (setq timer (run-with-idle-timer 0.1 t 'test))
> It generates:
> (focus-in #<frame emacs@localhost 0x1121908>)
> (focus-out #<frame emacs@localhost 0x1121908>)
Your code generates some output which mentions `focus-out' but it did
not generate those events.
>>> + ;; Some window managers generate the `focus-in' event
>>> + ;; when showing the Window List,
>> What means "showing the Window List"?
> It depends on the desktop environment, but usually this is a list of windows
> shown after typing Alt-Tab.
Then I still don't understand: why would Emacs get a focus-in event when
the window-manager shows the "Window List"? I'd maybe expect
a focus-*out* event, since suddenly the focus might go from Emacs to the
Window List.
Or do you mean that Emacs gets a focus-in event when the user selects
an Emacs frame in the window manager's Window List (maybe even if that
selection is transient while looping through all windows)?
>>> + ;; but `raise-frame' forcibly switches to an Emacs
>>> frame when the Window List is active,
Well, this behavior is a choice of the window-manager. While I'm very
happy to call raise-frame less often (so I generally agree with the
direction of the patch), you could argue that this might be a bug in the
window-manager.
> This is specific behavior observed at least in one window manager (Gnome 2),
> where typing Alt-Tab shows the Window List and generates the `focus-in' event
> in Emacs at the same time.
OK, I think I understand. Please make the comment a bit more clear
about the fact that the focus-in event might come even *while* (rather
than *when*) the "Window List thingy to select a window" is active.
> But maybe it should be handled like `focus-in', i.e. also
> to not ignore it in `mouse-avoidance-ignore-p' and to move
> the mouse pointer after switching between Emacs frames.
I don't have a strong opinion either way, but it seems like they
generally should be handled in the same way, since they occur in similar
circumstances (one being when you focus-in from another frame of the
same Emacs session, while the other is when you focus-in from some
other process).
Stefan
next prev parent reply other threads:[~2014-05-11 22:29 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-08 20:45 bug#17439: 24.3.50; run-with-idle-timer runs on focus-out Juri Linkov
2014-05-09 6:28 ` Eli Zaretskii
2014-05-09 20:35 ` Juri Linkov
2014-05-10 6:16 ` Eli Zaretskii
2014-05-10 20:38 ` Juri Linkov
2014-05-11 20:19 ` Juri Linkov
2014-05-11 21:06 ` Stefan Monnier
2014-05-11 21:31 ` Juri Linkov
2014-05-11 22:29 ` Stefan Monnier [this message]
2014-05-12 20:39 ` Juri Linkov
2014-05-13 19:33 ` Stefan Monnier
2014-05-20 21:14 ` Juri Linkov
2014-05-20 22:12 ` Juri Linkov
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