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Paul Murrell

2016-Nov-14 00:51 UTC

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

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/

frederik at ofb.net

2016-Nov-14 01:53 UTC

head link

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

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/
> -------------- next part --------------
# Examples for "onIdle" function in getGraphicsEvent
# FHE 13 Nov 2016 - public domain

# This should produce a "plot" display with 50 random points connected
# by lines. The points will scroll to the right at a fixed speed,
# which depends on how fast your computer is. Closing the plot window
# should terminate the function cleanly, and pressing Ctrl-C at the
# prompt should have the same effect.
testIdle1 = function() {
  # cairo is the flicker-free option for X11
  X11(type="cairo");
  on.exit(dev.off());

  ps=matrix(runif(100),ncol=2)
  getGraphicsEvent(
                   onIdle=function() {
                     plot(ps[,1],ps[,2],type="b",
                          xlim=c(0,1),ylim=c(0,1));
                     ps<<-t(t(ps)+c(0.001,0)) %% 1
                     NULL
                   }
                   );
}

# This is a more interactive example. You have to move the mouse to
# start, and then the mouse will leave a trail which shrinks and
# rotates towards the center of the screen. There is a 0.01 second
# delay (currently Linux-specific, since Sys.sleep() can't be used in
# onIdle) between successive updates, so, unlike the first example,
# this shouldn't use 100% of your CPU (I measured 20% on a 3.7GHz
# Xeon). Closing the window or pressing "q" should terminate the
# function, but sometimes Ctrl-C at the prompt is ignored due to the
# system() call.
testIdle2 = function(factor=0.99,theta=0.03) {
  n=200;

  xform=factor*
    rbind(c(cos(theta),-sin(theta)),
          c(sin(theta),cos(theta)));
  
  lastp=c(0,0);
  ps=matrix(lastp,ncol=2);

  # cairo is the flicker-free option for X11
  X11(type="cairo");
  on.exit(dev.off());

  getGraphicsEvent(
                   onIdle=function() {
                     plot(ps[,1],ps[,2],
                          xlim=c(-1,1),ylim=c(-1,1),type="l");
                     
                     ps<<-head(rbind(lastp,ps%*%xform),n);

                     # for Windows, comment or change appropriately
                     system("sleep 0.02");
                     
                     NULL
                   },
                   onMouseMove=function(buttons,x,y) {
                     newX=grconvertX(x,"ndc","user");
                     newY=grconvertY(y,"ndc","user");
                     lastp<<-c(newX,newY);
                     NULL;
                   },
                   onKeybd=function(key) {
                     if(key=="q") { 1 }
                     else { NULL }
                   }
                   );
}

Paul Murrell

2016-Nov-14 19:43 UTC

head link

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

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/

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