GNU bug report logs - #16565
24.3.50; x-popup-menu just returns nil

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Jan Djärv <jan.h.d <at> swipnet.se>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#16565: closed (24.3.50; x-popup-menu just returns nil)
Date: Wed, 29 Jan 2014 08:28:04 +0000

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Your message dated Wed, 29 Jan 2014 09:27:24 +0100
with message-id <52E8BB6C.9070109 <at> swipnet.se>
and subject line Re: bug#16565: 24.3.50; x-popup-menu just returns nil
has caused the debbugs.gnu.org bug report #16565,
regarding 24.3.50; x-popup-menu just returns nil
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; x-popup-menu just returns nil
Date: Mon, 27 Jan 2014 03:50:37 +0100

Hello,

in emacs -Q, I eval the following:

--8<---------------cut here---------------start------------->8---
(defun foo (event)
  (interactive "e")
  (message "%s" (x-popup-menu event (mouse-menu-bar-map))))
 
(global-set-key
 [(meta control mouse-3)] ;just some free key
 #'foo)
--8<---------------cut here---------------end--------------->8---

Now, I hit M-C-mouse-3 somewhere.  The menu appears at the right place.
I select any item, and FOO messages "nil" instead of a list of events.
This is the bug.

However, when I redefine FOO so that it uses t instead of EVENT as first
argument of `x-popup-menu', it works as expected!

The problem seems to be system specific.  I see it on Debian Linux with
X, Drew Adams doesn't see it under Windows.

I use openbox, but the behavior is the same in an X session without any
window manager.


Regards,

Michael.



In GNU Emacs 24.3.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 3.8.6)
 of 2014-01-27 on drachen
Windowing system distributor `The X.Org Foundation', version 11.0.11405000
System Description:	Debian GNU/Linux testing (jessie)

Important settings:
  value of $LC_ALL: de_DE.utf8
  value of $LC_COLLATE: C
  value of $LC_TIME: C
  value of $LANG: de_DE.utf8
  locale-coding-system: utf-8-unix

[Message part 3 (message/rfc822, inline)]

From: Jan Djärv <jan.h.d <at> swipnet.se>
To: Eli Zaretskii <eliz <at> gnu.org>, Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: 16565-done <at> debbugs.gnu.org
Subject: Re: bug#16565: 24.3.50; x-popup-menu just returns nil
Date: Wed, 29 Jan 2014 09:27:24 +0100

Hello.

2014-01-28 17:31, Eli Zaretskii skrev:
>> From: Michael Heerdegen <michael_heerdegen <at> web.de>
>
>> I continued debugging xmenu_show and found that after the call to
>> `create_and_show_popup_menu', `menu_item_selection' is only != 0 in the
>> good case.
>
> Perhaps Jan could help us out, then.  Jan, it sounds like GTK doesn't
> like what we do with the menu, for some reason.
>

The Gtk+ assumtion is that popup is done on key down, not key up, i.e.:

(global-set-key
 [(meta control down mouse-3)] ;just some free key
 #'foo)

It is very strange to popup a menu on key up.  From the Gtk+ point of view, 
that corresponds to popping up without a mouse click, hence the error.  I have 
checked in a fix in trunk.

	Jan D.

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