[Rd] X11 device windows are spawned with empty WM_NAME property

Drew Frank ajfrank at ics.uci.edu
Fri Jun 17 23:05:01 CEST 2011

On Fri, Jun 17, 2011 at 1:57 PM, Drew Frank <ajfrank at ics.uci.edu> wrote:
> On Fri, Jun 17, 2011 at 7:26 AM, peter dalgaard <pdalgd at gmail.com> wrote:
>> On Jun 17, 2011, at 15:32 , Prof Brian Ripley wrote:
>> >>>
>> >>> Is this behavior intended?  Would be it be reasonable to instead create
>> >>> windows with a generic name like "R Graphics" prior to updating them with
>> >>> the device number and active/inactive status?
>> >
>> > Yes, no.
>> >
>> Well, "yes, maybe", I'd say. If the WM insists on looking at the title, it makes some pragmatic sense for the user to set it to a generic name that the WM can recognize.
>> However, on revisiting this, the obvious fix/workaround is just to set
>> X11.options(title="R Graphics: Device %d")
>> and the user can do this in his/her startup files. No need to inflict it on every user with any WM.
>> --
>> Peter Dalgaard
>> Center for Statistics, Copenhagen Business School
>> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
>> Phone: (+45)38153501
>> Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com

Thank you Peter and Brian for your replies.  The X11.options
workaround is effective, and I'd be happy to make use of it.

That said, after reading your replies I agree that the "correct" thing
to do would be for the WM to match on WM_CLASS, which is currently not
set.  I checked out the R-devel trunk and was preparing a patch to set
WM_CLASS when I noticed that Brian already committed code to do this
in r56008.  However, the code is wrapped in an "#ifndef USE_Xt", with
the comment "/* For those too idle to make use of Xt (PR#14588) */".
When I compile, USE_Xt is set so this code isn't executed and WM_CLASS
is never set.  Is it supposed to be set somewhere else?

Thank you,

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