Marking with mouse does not highlight region

Marking with mouse does not highlight region

[Arash Esbati]

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Hi all,

I am observing a strange behavior: Emacs does not highlight region when
marked with mouse during the first mark process.  The region is
highlighted when I release the mouse button.  After that, I can hold the
mouse button and mark, region is highlighted directly.

I started Emacs with `emacs -Q' and tried it with `C-h f forward-sexp'.
The screenshot below shows what happens in the very same help buffer:
Above, the region is marked, but not highlighted, below, I released the
mouse button and see the highlighting.


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I'm using Emacs 25.0.95 on Win7 64bit.  24.5 does not show this
behavior.  Any idea?

Best, Arash

Re: Marking with mouse does not highlight region

[Noam Postavsky]

On Tue, Jul 12, 2016 at 8:55 AM, Arash Esbati <esbati@gmx.de> wrote:
> I'm using Emacs 25.0.95 on Win7 64bit.  24.5 does not show this
> behavior.  Any idea?
>

No idea why, but I see the same thing (Win8.1, 64bit).

Re: Marking with mouse does not highlight region

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Tue, 12 Jul 2016 09:16:27 -0400
> 
> On Tue, Jul 12, 2016 at 8:55 AM, Arash Esbati <esbati@gmx.de> wrote:
> > I'm using Emacs 25.0.95 on Win7 64bit.  24.5 does not show this
> > behavior.  Any idea?
> >
> 
> No idea why, but I see the same thing (Win8.1, 64bit).

I don't understand the recipe.  Can it be spelled out, please?

Re: Marking with mouse does not highlight region

[Noam Postavsky]

On Tue, Jul 12, 2016 at 9:51 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>> From: Noam Postavsky <npostavs@users.sourceforge.net>
>> Date: Tue, 12 Jul 2016 09:16:27 -0400
>>
>> On Tue, Jul 12, 2016 at 8:55 AM, Arash Esbati <esbati@gmx.de> wrote:
>> > I'm using Emacs 25.0.95 on Win7 64bit.  24.5 does not show this
>> > behavior.  Any idea?
>> >
>>
>> No idea why, but I see the same thing (Win8.1, 64bit).
>
> I don't understand the recipe.  Can it be spelled out, please?

emacs -Q

Evaluate

;; Alternatively use C-h k k to get a new *Help* buffer, same behaviour
(with-current-buffer (get-buffer-create "*foo*")
  (insert "some text\n")
  (display-buffer-pop-up-window (current-buffer) nil))

Click left mouse button down in the new buffer, then drag without releasing.
Observe region is not highlighted. (In Emacs 24.5 the region is highlighted)
Release mouse, region is highlighted.

Re: Marking with mouse does not highlight region

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Tue, 12 Jul 2016 10:25:04 -0400
> Cc: Emacs developers <emacs-devel@gnu.org>
> 
> emacs -Q
> 
> Evaluate
> 
> ;; Alternatively use C-h k k to get a new *Help* buffer, same behaviour
> (with-current-buffer (get-buffer-create "*foo*")
>   (insert "some text\n")
>   (display-buffer-pop-up-window (current-buffer) nil))
> 
> Click left mouse button down in the new buffer, then drag without releasing.
> Observe region is not highlighted. (In Emacs 24.5 the region is highlighted)
> Release mouse, region is highlighted.

Thanks.

Is this Windows specific, or does it happen on X as well?

Re: Marking with mouse does not highlight region

[Michael Heerdegen]

Eli Zaretskii <eliz@gnu.org> writes:

> Is this Windows specific, or does it happen on X as well?

X here, and I see it too.


Michael.

Re: Marking with mouse does not highlight region

[Noam Postavsky]

On Tue, Jul 12, 2016 at 6:37 PM, Michael Heerdegen
<michael_heerdegen@web.de> wrote:
> Eli Zaretskii <eliz@gnu.org> writes:
>
>> Is this Windows specific, or does it happen on X as well?
>
> X here, and I see it too.

Yup.