I'm working on a graphics device in a R package, and need to set some graphical parameters for text / labels on the devices as they are initialized or reset.
This feature is described in R Internals: > The three copies of the GPar structure are used to store the current > parameters (accessed via gpptr), > the ‘device copy’ (accessed via dpptr) and space for a saved copy of the > ‘device copy’ parameters. > The current parameters are, clearly, those currently in use and are copied > from the ‘device copy’ > whenever plot.new() is called (whether or not that advances to the next > ‘page’). The saved copy > keeps the state when the device was last completely cleared (e.g. when > plot.new() was called > with par(new=TRUE)), and is used to replay the display list. How do I, from a package, actually access and initialize the "device copy" ? All I've been able to find is a comment containing an older, copy-pasted comment in GraphicsDevice.h : > * 2. I found this comment in the doc for dev_Open -- looks nasty > * Any known instances of such a thing happening? Should be > * replaced by a function to query the device for preferred gpars > * settings? (to be called when the device is initialised) > * > * NOTE that it is perfectly acceptable for this > * function to set generic graphics parameters too > * (i.e., override the generic parameter settings > * which GInit sets up) all at the author's own risk > * of course :) Thanks, Neal ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
