R help - Mar 2012 - changing the drawing context using Cairo and RGtk2

I am not too familiar with Cairo and RGtk2 and have the following problem:
I have a container with two GTK drawing areas converted into Cairo devices. 
I know that I can set the current drawing context e.g. using dev.set().
But this is tedious. How can I set the context using the objects da1 or da2?

 w <- gtkWindow()
 w$setSizeRequest(400, 400)
 vbox <- gtkVBox()
 da1 <- gtkDrawingArea()   
 da2 <- gtkDrawingArea() 
 vbox$add(da1)
 vbox$add(da2)
 dummy <- asCairoDevice(da1) 
 dummy <- asCairoDevice(da2)
 w$add(vbox)
 par(oma=c(0,0,0,0), mar=c(0,0,0,0)) 
 plot(1:10)  

THX
--Mark
????????????????????????????????????
Mark Heckmann
Blog: www.markheckmann.de
R-Blog: http://ryouready.wordpress.com

Currently, the GtkDrawingArea object has no real knowledge that it is being
used as a graphics device. You could do something like: stick the device ID
on da1/da2 as an attribute, and then have a function that does dev.set with
that attribute.

Michael

On Mon, Mar 5, 2012 at 1:14 PM, Mark Heckmann <mark.heckmann@gmx.de>
wrote:
> I am not too familiar with Cairo and RGtk2 and have the following problem:
> I have a container with two GTK drawing areas converted into Cairo devices.
> I know that I can set the current drawing context e.g. using dev.set().
> But this is tedious. How can I set the context using the objects da1 or
> da2?
>
>  w <- gtkWindow()
>  w$setSizeRequest(400, 400)
>  vbox <- gtkVBox()
>  da1 <- gtkDrawingArea()
>  da2 <- gtkDrawingArea()
>  vbox$add(da1)
>  vbox$add(da2)
>  dummy <- asCairoDevice(da1)
>  dummy <- asCairoDevice(da2)
>  w$add(vbox)
>  par(oma=c(0,0,0,0), mar=c(0,0,0,0))
>  plot(1:10)
>
> THX
> --Mark
> ––––––––––––––––––––––––––––––––––––
> Mark Heckmann
> Blog: www.markheckmann.de
> R-Blog: http://ryouready.wordpress.com
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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