From paul at stat.auckland.ac.nz  Tue Nov 15 20:02:38 2016
From: paul at stat.auckland.ac.nz (Paul Murrell)
Date: Wed, 16 Nov 2016 08:02:38 +1300
Subject: [Rd] getGraphicsEvent() alternative for cairo graphics device?
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Hi

That sounds good - somewhere public like that would be best.

Thanks!

Paul

On 16/11/16 00:13, Mark O'Connell wrote:
> Hi Paul,
>
> No problem. Is it best if I post examples to the bug report 16951?
>
> Kind regards,
> Mark
>
> --
>
> Mark O'Connell, PhD student
> Department of Mathematics & Statistics
> 231 Top Logic
> National University of Ireland, Maynooth
>
> ----- Paul Murrell <paul at stat.auckland.ac.nz> wrote:
>>
>> Thanks Frederick.
>>
>> Mark, if you have any examples to share, they would also be gratefully
>> received.
>>
>> Paul
>>
>> On 14/11/16 14:53, frederik at ofb.net wrote:
>>> Hi Paul,
>>>
>>> OK I tried not to make the examples too fancy.
>>>
>>> Please let me know what you think. They should probably be amended to
>>> support the Windows platform, but I think that task would be much
>>> easier for someone with access to Windows...
>>>
>>> By the way I'm Cc'ing Mark O'Connell who shared with me some great
>>> getGraphicsEvent examples - well, I found them useful, perhaps if
>>> these are going to the R distro somewhere, then his examples should be
>>> included as well.
>>>
>>> Thank you,
>>>
>>> Frederick
>>>
>>> On Mon, Nov 14, 2016 at 01:51:08PM +1300, Paul Murrell wrote:
>>>>
>>>> Great.  Thanks!
>>>>
>>>> Paul
>>>>
>>>> On 14/11/16 13:41, frederik at ofb.net wrote:
>>>>> Hi Paul,
>>>>>
>>>>> Thank you, for some reason I didn't seem to get an email notification
>>>>> for your bugzilla comment!
>>>>>
>>>>> I will try to send you something shortly.
>>>>>
>>>>> Frederick
>>>>>
>>>>> On Mon, Nov 14, 2016 at 08:55:20AM +1300, Paul Murrell wrote:
>>>>>> Hi
>>>>>>
>>>>>> The current status is that I am keen for people to contribute some testing
>>>>>> code (see https://bugs.r-project.org/bugzilla/show_bug.cgi?id=16951)
>>>>>>
>>>>>> There were also some getGraphicsEvent() changes/fixes suggested by Richard
>>>>>> Bodewits (cc'ed), for which I am also seeking test code.
>>>>>>
>>>>>> Paul
>>>>>>
>>>>>> On 13/11/16 09:00, frederik at ofb.net wrote:
>>>>>>> Hi Paul,
>>>>>>>
>>>>>>> Just checking in to see what the status is.
>>>>>>>
>>>>>>> From my perspective it seems logical to split off X11 into a separate
>>>>>>> package, so development can proceed at a reasonable rate, but I
>>>>>>> haven't yet tried to see if that's even possible.
>>>>>>>
>>>>>>> Thanks,
>>>>>>>
>>>>>>> Frederick
>>>>>>>
>>>>>>> On Tue, Jul 26, 2016 at 09:23:35AM +1200, Paul Murrell wrote:
>>>>>>>> Hi
>>>>>>>>
>>>>>>>> Taking a look at those patches is now on my todo list, so I may be in touch
>>>>>>>> with both of you at some point to request some testing.
>>>>>>>>
>>>>>>>> Paul
>>>>>>>>
>>>>>>>> On 26/07/16 07:17, frederik at ofb.net wrote:
>>>>>>>>> Dear Daniel Greenidge,
>>>>>>>>>
>>>>>>>>> To enable getGraphicsEvent on Cairo, you have two patches to choose
>>>>>>>>> from:
>>>>>>>>>
>>>>>>>>> https://bugs.r-project.org/bugzilla/show_bug.cgi?id=14364
>>>>>>>>> https://bugs.r-project.org/bugzilla/show_bug.cgi?id=16951
>>>>>>>>>
>>>>>>>>> The second one is by me, and the first one is from five years ago by
>>>>>>>>> Hugo Mildenberger.
>>>>>>>>>
>>>>>>>>> Both patches are very simple, they move some lines enabling
>>>>>>>>> getGrahpicsEvent outside of a if(!cairo) statement. My patch also adds
>>>>>>>>> the ability to execute code (e.g. for animation) while the interface
>>>>>>>>> is idle.
>>>>>>>>>
>>>>>>>>> Top guy Duncan Murdoch has expressed that he doesn't have time to work
>>>>>>>>> on applying these patches, and I haven't had any responses from the
>>>>>>>>> rest of the R Core Team. I was thinking that perhaps your best bet is
>>>>>>>>> to try to create a package called e.g. "X11-fixes" which people can
>>>>>>>>> use to get a better X11 library (there is also a bug waiting to be
>>>>>>>>> fixed from 2001:
>>>>>>>>> https://bugs.r-project.org/bugzilla/show_bug.cgi?id=16702).
>>>>>>>>>
>>>>>>>>> I don't know if CRAN would accept such a package, or if you'd have to
>>>>>>>>> distribute it via GitHub, but R has excellent tools to facilitate the
>>>>>>>>> distribution of code via packages. Whether the R kernel exports enough
>>>>>>>>> functions to allow a package to take over event handling, I'm not
>>>>>>>>> sure. I was intending to look more into the details of this
>>>>>>>>> possibility but haven't had time.
>>>>>>>>>
>>>>>>>>> Best wishes,
>>>>>>>>>
>>>>>>>>> Frederick
>>>>>>>>>
>>>>>>>>> On Mon, Jul 25, 2016 at 02:15:59PM -0400, Daniel Greenidge wrote:
>>>>>>>>>> Hi all,
>>>>>>>>>>
>>>>>>>>>> I'm writing an interactive plotting function for viewing fMRI
>>>>>>>>>> datasets. Currently, I get keypresses using
>>>>>>>>>> grDevices::getGraphicsEvent().
>>>>>>>>>>
>>>>>>>>>> Unfortunately getGraphicsEvent() only supports the X11(type="Xlib")
>>>>>>>>>> graphics device on Unix systems. The Xlib device doesn't support
>>>>>>>>>> buffering (i.e. dev.hold() and dev.flush()), so redrawing the plots
>>>>>>>>>> causes lots of flickering.
>>>>>>>>>>
>>>>>>>>>> Is there a way to get keypresses while using the cairo graphics
>>>>>>>>>> device? Alternatively, is there a way to prevent flickering with the
>>>>>>>>>> Xlib graphics device?
>>>>>>>>>>
>>>>>>>>>> Best,
>>>>>>>>>> Daniel Greenidge
>>>>>>>>>>
>>>>>>>>>> ______________________________________________
>>>>>>>>>> R-devel at r-project.org mailing list
>>>>>>>>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> ______________________________________________
>>>>>>>>> R-devel at r-project.org mailing list
>>>>>>>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Dr Paul Murrell
>>>>>>>> Department of Statistics
>>>>>>>> The University of Auckland
>>>>>>>> Private Bag 92019
>>>>>>>> Auckland
>>>>>>>> New Zealand
>>>>>>>> 64 9 3737599 x85392
>>>>>>>> paul at stat.auckland.ac.nz
>>>>>>>> http://www.stat.auckland.ac.nz/~paul/
>>>>>>>>
>>>>>>
>>>>>> --
>>>>>> Dr Paul Murrell
>>>>>> Department of Statistics
>>>>>> The University of Auckland
>>>>>> Private Bag 92019
>>>>>> Auckland
>>>>>> New Zealand
>>>>>> 64 9 3737599 x85392
>>>>>> paul at stat.auckland.ac.nz
>>>>>> http://www.stat.auckland.ac.nz/~paul/
>>>>>>
>>>>
>>>> --
>>>> Dr Paul Murrell
>>>> Department of Statistics
>>>> The University of Auckland
>>>> Private Bag 92019
>>>> Auckland
>>>> New Zealand
>>>> 64 9 3737599 x85392
>>>> paul at stat.auckland.ac.nz
>>>> http://www.stat.auckland.ac.nz/~paul/
>>>>
>>
>> --
>> Dr Paul Murrell
>> Department of Statistics
>> The University of Auckland
>> Private Bag 92019
>> Auckland
>> New Zealand
>> 64 9 3737599 x85392
>> paul at stat.auckland.ac.nz
>> http://www.stat.auckland.ac.nz/~paul/
>

-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul at stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/



[Rd] getGraphicsEvent() alternative for cairo graphics device?
Paul Murrell