R devel - Jul 2010 - HowTo get callback on destroy of grDevices::windows()

I'm build with the usage of the tcltk/tcltk2 package a gui which is

started with rscript.exe. At this gui the user is able to open and close
plot windows.

Now I'm looking for a way that a r function is called when a
grDevices::windows window is closed.
Is there a way to attach a callback function or so, which would be
triggert if the user click at close of the grDevices::window?

My workarround is to check continues the open windows with the tcl
command after, but it's no good workarround.

thanks
roland

Hi

On 27/07/2010 7:49 a.m., rrichte2 at fh-lausitz.de
wrote:
>    I'm build with the usage of the tcltk/tcltk2 package a gui which is
>
> started with rscript.exe. At this gui the user is able to open and close
> plot windows.
>
> Now I'm looking for a way that a r function is called when a
> grDevices::windows window is closed.
> Is there a way to attach a callback function or so, which would be
> triggert if the user click at close of the grDevices::window?
>
> My workarround is to check continues the open windows with the tcl
> command after, but it's no good workarround.
I don't think this is possible with standard R graphics devices.  Have 
you taken a look at the 'tkrplot' package; if you produce a tcltk window
with an R graphics device embedded, instead of opening/closing raw R 
graphics devices, perhaps you could gain more control over the 
opening/closing of the window (?)

Paul
> thanks
> roland
>
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Dr Paul Murrell
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