Re: [Rd] tcltk GUIs (was need gui matrix editor: does R Core team have advice on how?)

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Sun, 29 Jan 2012 12:10:19 +0000

On 28/01/2012 22:04, John Fox wrote:
> Dear Paul and Gabor,
>
> The Rcmdr GUI uses the tcltk package, so I have some experience with
> providing an R tcltk-based GUI for various platforms.
>
> As Gabor says, everything works very smoothly on Windows because the R
> Windows binary includes Tcl/Tk.

Maybe, but getting it there was very far from smooth. Tcl/Tk compiled under the compilers we used, but the resulting DLLs crashed R. No one has ever found the cause and I used the system SDK (essentiallly a version of VC++) to build them. And that puts us in a bind since the current system SDKs generate code depending on DLLs that are not part of the minimal OS versions we support (e.g. Windows XP and Server 2003, and the machine used to build was retired 2 years ago).

> On Mac OS X, it's necessary for the user to
> install Tcl/Tk for X Windows and to insure that X Windows is installed (as
> it typically is in recent releases of Mac OS X). In my experience, most
> Linux users already have Tcl/Tk and X Windows (or if they don't, they're
> familiar with how to install software on their systems), so that things work
> smoothly there as well.
>
> The upshot of this is that Mac OS X is the platform that seems to generate
> the most problems for naive users, although installing Tcl/Tk for X Windows
> isn't that difficult. Take a look, e.g., at the Rcmdr installation notes
> <http://socserv.socsci.mcmaster.ca/jfox/Misc/Rcmdr/installation-notes.html>.

If this were really a problem it could be resolved with far less effort than was needed on Windows. The X11 version of Tk is only needed to get R's tcltk to play under R.app. For those wanting a Tk-based front end for command-line R, it is easy to build R against the Tcl/Tk which ships with OS X (or an update of it) and get fully Aqua-themed widgets. If I want to show Rcmdr to a Mac user, that is what I use.

As various recent threads on R-sig-mac show, some useRs are capable of misconfiguring their Macs so that X11 does not work, does not find any fonts ... but maybe they could manage the same on any other Unix-alike.

> I hope this helps,
> John
>
> --------------------------------
> John Fox
> Senator William McMaster
> Professor of Social Statistics
> Department of Sociology
> McMaster University
> Hamilton, Ontario, Canada
> http://socserv.mcmaster.ca/jfox
>

-- 
Brian D. Ripley,                  ripley_at_stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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