R devel - Sep 2005 - indicating progress in RGui from a c function

Hi,

I'm sure this issue has come up before, but searching the archives
didn't
lead me to a solution or resolution of the issue.

 

I'd like to indicate progress of a calculation from within a C shared
library to the R GUI.  The apparent function call is flush.console() after
RPrintf, but it isn't clear to me what the easiest way to do this is.  Would
it be possible to add a flag to RPrintf to have this done implicitly?

 

Thanks,

chris


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On Tue, 20 Sep 2005, Chris Paulse wrote:
> I'm sure this issue has come up before, but searching the archives
didn't
> lead me to a solution or resolution of the issue.
It is documented in the rw-FAQ: Q8.8 in the R-2.2.0-alpha version.
> I'd like to indicate progress of a calculation from within a C shared
> library to the R GUI.  The apparent function call is flush.console() after
> RPrintf, but it isn't clear to me what the easiest way to do this is. 
Would
> it be possible to add a flag to RPrintf to have this done implicitly?
No.  It's a varargs function and we cannot go round changing the API.
> 	[[alternative HTML version deleted]]
Please don't send HTML mail as we do ask in the posting guide.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

On 20 Sep 2005, cpaulse at aecom.yu.edu wrote:
> I'd like to indicate progress of a calculation from within a C
> shared library to the R GUI.  The apparent function call is
> flush.console() after RPrintf, but it isn't clear to me what the
> easiest way to do this is.  Would it be possible to add a flag to
> RPrintf to have this done implicitly?
When you do get this sorted out, you may want to consider a verbose
option that toggles such updating of the GUI.  When users want to run
code in a non-interactive mode, such output can get in the way.

You could use interactive() to determine a default value for the
verbose option.

Best,

+ seth