GNU bug report logs - #9366
Display geometry change hook

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From: David De La Harpe Golden <david <at> harpegolden.net>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 9366 <at> debbugs.gnu.org
Subject: bug#9366: Display geometry change hook
Date: Thu, 25 Aug 2011 13:42:29 +0100

On 25/08/11 06:55, Eli Zaretskii wrote:
>> Date: Thu, 25 Aug 2011 06:16:58 +0100
>> From: David De La Harpe Golden<david <at> harpegolden.net>
>>
>> Dunno about w32 as yet, but presumably it has something similar.
>
> On MS-Windows there's the WM_DISPLAYCHANGE message sent to the message
> pump.  Emacs already accepts that message (see w32term.c), but
> currently does nothing with it except announcing the change to the
> attached debugger.
>
> However, on Windows the message also specifies the new resolution, so
> this:
>

Technically the incoming x11 event does too, but as you can re-query 
with the existing #'display-pixel-width etc. functions (and get the new 
values) anyway by the time the hook actually runs (on x11), wasn't sure 
we needed to allow for propagation of the info really.

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