On Tue, Sep 7, 2010 at 11:34 AM, Simon Urbanek <simon.urba...@r-project.org>wrote:
> > On Sep 7, 2010, at 2:21 PM, ghostwheel wrote: > > > > > Another message about the R to TeXmacs interface. > > > > 1. Graphics > > The TeXmacs interface allows the user to directly insert graphics into > the > > session. > > > > Since I am not very familiar with programming for R, I implemented the > > interaction with graphics in a very primitive way. It was two modes of > > working: with X11, and without (for example when working remotely through > > ssh without forwarding X11). > > > > In both cases the user has to invoke a command, v(), in order to insert > the > > current graph into the buffer at the current place. > > > > With X11, the way it works is that when v() is invoked I call > recordPlot(), > > then open a postscript file, then replayPlot(), and then close the > > postscript file and insert it into the session. > > > > Without X11, I open a postscript file ahead of time, then when v() is > > called, I close it, and insert it into the session, and then open a new > > postscript file. > > > > Obviously quite primitive.I think ideally would be if everything was > > transparent to the user - the user does a plot, and the plot is inserted > > into the buffer right away, and later, updates to the same plot update > the > > original plot where it is. But to be able to do that I need to be able to > > generate the postscript file of the current plot, and be notified somehow > > whenever the plot changes. > > > > Is all that possible? Is there a better way to implement this all? > > > > I don't know the mechanics of the actual "inserting" in TeXmac but it would > be trivial to simply create a copy of the plot as EPS (or whatever is > needed) at the time of insertion. See dev.copy2eps() for a function that > does exactly that. > > > > > 2. Libraries > > > > A remotely related question is this: the interface with TeXmacs generates > > menus that depend on the currently loaded libraries. > > Libraries are not "loaded" (see .libPath() for handling libraries) - but > chances are that you meant packages... > > > > I'd like to be able to > > update the menus whenever a new library is loaded. Is there a possibility > to > > have a function called whenever this happens? Or would it be advisable to > > change the global 'library' function? > > > > I would strongly advise against the latter. A reasonably simple way would > be to check the search path - if it changed a package has been loaded. A > natural place to do such check would be in a top-level task handler for > example. > > Another possibility would be the setHook() function. Michael Cheers, > Simon > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
