GNU bug report logs - #7084
24.0.50; alpha frame parameter causes flashing with standalone minibuffer

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "Drew Adams" <drew.adams <at> oracle.com>
To: <bug-gnu-emacs <at> gnu.org>
Subject: 24.0.50;
	alpha frame parameter causes flashing with standalone minibuffer
Date: Wed, 22 Sep 2010 10:45:20 -0700

I use a standalone minibuffer frame.

If I set the alpha frame parameter for some frame to (alpha 100 . 80),
then whenever that frame is inactive it becomes 20% transparent, as
intended.  However, when the minibuffer becomes active the alpha frame
flashes.  And it flashes again for each char I type or delete in the
minibuffer.  This renders the alpha feature useless.


In GNU Emacs 24.0.50.1 (i386-mingw-nt5.1.2600)
 of 2010-09-20 on 3249CTO
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.4) --no-opt --cflags
-Ic:/imagesupport/include'

Message #10 received at 7084 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: "Drew Adams" <drew.adams <at> oracle.com>
Cc: 7084 <at> debbugs.gnu.org
Subject: Re: bug#7084: 24.0.50;
 alpha frame parameter causes flashing with standalone minibuffer
Date: Sun, 09 Feb 2014 21:15:39 -0800

"Drew Adams" <drew.adams <at> oracle.com> writes:

> I use a standalone minibuffer frame.
>
> If I set the alpha frame parameter for some frame to (alpha 100 . 80),
> then whenever that frame is inactive it becomes 20% transparent, as
> intended.  However, when the minibuffer becomes active the alpha frame
> flashes.  And it flashes again for each char I type or delete in the
> minibuffer.  This renders the alpha feature useless.

Is this problem still present in Emacs 24.3?

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Message #13 received at 7084 <at> debbugs.gnu.org (full text, mbox):

From: Drew Adams <drew.adams <at> oracle.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 7084 <at> debbugs.gnu.org
Subject: RE: bug#7084: 24.0.50; alpha frame parameter causes flashing with
 standalone minibuffer
Date: Sun, 9 Feb 2014 21:31:33 -0800 (PST)

> Is this problem still present in Emacs 24.3?

Yes, and in a 24.4 build from 2014-02-07.  It makes frame
parameter `alpha' unusable for a setup that has a standalone
minibuffer frame (mine, at least).

Message #18 received at 7084-done <at> debbugs.gnu.org (full text, mbox):

From: martin rudalics <rudalics <at> gmx.at>
To: Drew Adams <drew.adams <at> oracle.com>, 
 Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 7084-done <at> debbugs.gnu.org
Subject: Re: bug#7084: 24.0.50; alpha frame parameter causes flashing with
 standalone minibuffer
Date: Fri, 22 Sep 2017 10:44:47 +0200

>> Is this problem still present in Emacs 24.3?
>
> Yes, and in a 24.4 build from 2014-02-07.  It makes frame
> parameter `alpha' unusable for a setup that has a standalone
> minibuffer frame (mine, at least).

When I start Emacs 24.5.50.1 with the -Q option and load a file with the
following contents

(setq default-frame-alist '((minibuffer . nil)))

(set-frame-parameter nil 'alpha (cons 100 80))

and I now type C-h f in the "alpha frame", I can indeed see "the alpha
frame flash (at least on Windows)".  Since I cannot reproduce this
flashing with a build of Emacs 25.3.50.1, I'm marking this bug as done.

Thanks for the report, martin

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