[ESS] ESS toolbar

[Stephen Eglen]

> Even after your explanation I am a bit mystified by a few things:
> 
> Firstly why does the manual say
>  Variable: auto-resize-tool-bar
> 
>     If this variable is non-nil, the tool bar automatically resizes to
> show all defined tool bar items but not larger than a quarter of the
> frame's height.
> 
> when the tool bar can only have one line? I read that to mean the tool
> bar would increase in height to fit the icons. And
> auto-resize-tool-bar is stated there to be a variable, so what is
> going on?
> 
> Secondly, how is the different behaviour that I noted on windows
> (where the tool bar does expand giving a second row of icons)
> achieved? Is it because the windowing system is different on windows,
> ie not X?

These two things are probably connected -- I think they apply on windows
and mac, but not on linux.  I just experimented on mac, and making the
frame smaller does increase the number of rows on the toolbar.  The docs
should presumably thus say mac and windows only, or similar.

There is clearly another bug in the documentation though as I could get the
toolbar to be more than a quarter of the frame's height!

(needless to say, this is all a reflection of Emacs, rather than ESS.)


> mouse than use command keys repeatedly to invoke this function. I
> guess another option would be to rebind that function to some other
> key sequence, but that could bring unforeseen conflicts.

I have C-j bound in .R buffers to my favourite:
  C-j runs the command ess-eval-line-and-step

so that whizzing through a set of lines is a breeze.

Stephen