[R] Floating windows in TCLTK

[Prof Brian Ripley]

On Wed, 14 Nov 2001, David Middleton wrote:

> Simon.Gatehouse at csiro.au wrote:
>
> > I'm trying, without any success, to get a simple TCLTK window to remain
> > floating on top of the RGui and RConsol windows when the later have focus.
>
> ...
> > I'm running R in Windows 2000
>
> I suspect that this is a windows issue rather than anything specific to
> Tk/Tcl in R.  Under windows NT, and presumably win 2000, you can download a
> utility from microsoft called TweakUI which allows you to change the
> behaviour of windows.  If you choose to have the focus following the mouse,
> and no raising of windows with the focus, you should get the behaviour you
> want.

Unfortunately not (I use TweakUI to have focus following the mouse: it
doesn't raise focussed windows for me).  This works perfectly with
multiple R windows in --sdi mode, *except* with package tcltk.
It seems Tcl/Tk on Windows uses some hidden windows to manage its event
queue, with the result that all visible windows lose focus, and you have
to click on one of them.  So I think it is a Tcl/Tk issue.


-- 
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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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