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

[frederik at ofb.net]

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/
>