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indicating progress in RGui from a c function
3 messages · Chris Paulse, Brian Ripley, Seth Falcon
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.
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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