R devel - Nov 2009 - Sending signals to current R process from R running under MS Windows (c.f. Esc)

I am using RGtk2 for a simple GUI (rattle).

I start rattle from the RGui and I remain able to interact with the
RGui while rattle runs.

Under MS/Windows, when rattle has initiated some other underlying R
command the rattle GUI remains responsive (unlike under GNU/Linux
where it is not responsive until the underlying command completes).

I can interrupt the running command with a press of the Esc key in the RGui.

I want to have a button on the rattle GUI to run an R command to have
the same behavior as pressing the Esc key in the RGui. I currently
have a button in rattle as an example that will run another R command
whilst the original R command is still running.

Looking at the C source code for the RGui it looks like it is sending
a SIGBREAK signal to the R process.

Is this possible to do, somehow, from R?

Thanks,
Graham

Hi,

here is some discussion/information in the same vein:

(1) R-help thread '[R] The R "fork"', March 18, 2006:

  https://stat.ethz.ch/pipermail/r-help/2006-March/101913.html

(2) R-devel thread '[Rd] New simpleExit() condition (Was: Re: Can
example() code stop the example without generating an error?)', March
14-16, 2006:

  https://stat.ethz.ch/pipermail/r-devel/2006-March/036861.html

(3) Regarding sending SIGINT on Windows, I posted the following
question (without replies): 'Fix Unix' thread 'Sending/generating
SIGINT to process', Oct 1, 2007:

 http://fixunix.com/microsoft-windows/30232-sending-generating-sigint-process.html

/Henrik

On Sat, Nov 28, 2009 at 10:54 AM, Graham Williams
<Graham.Williams at togaware.com> wrote:
> I am using RGtk2 for a simple GUI (rattle).
>
> I start rattle from the RGui and I remain able to interact with the
> RGui while rattle runs.
>
> Under MS/Windows, when rattle has initiated some other underlying R
> command the rattle GUI remains responsive (unlike under GNU/Linux
> where it is not responsive until the underlying command completes).
>
> I can interrupt the running command with a press of the Esc key in the
RGui.
>
> I want to have a button on the rattle GUI to run an R command to have
> the same behavior as pressing the Esc key in the RGui. I currently
> have a button in rattle as an example that will run another R command
> whilst the original R command is still running.
>
> Looking at the C source code for the RGui it looks like it is sending
> a SIGBREAK signal to the R process.
>
> Is this possible to do, somehow, from R?
>
> Thanks,
> Graham
>
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>