[ESS] How to get the assign-key <- via command + return?

[Kasper Daniel Hansen]

On Sun, Sep 11, 2011 at 11:21 AM, Hofert  Jan Marius
<marius.hofert at math.ethz.ch> wrote:
>
> On 2011-09-11, at 15:46 , Kasper Daniel Hansen wrote:
>
>> Step 1: figure out what function you want to bind to the key.  Here
>> you can use that you know the function is already bound to underscore,
>> so pressing
>>  C-h k _
>> (C-h k is "help on key"), tells me that the function is called
>> ess-smart-underscore.
>
> Dear Kasper,
>
> thank you very much, that clarified a lot! (I am only using emacs for a couple of days now...)
>
>>
>> Step 2: figure out what key you are pressing.  I have never seen the
>> 'A' for the command key.  You know of 'meta' and 'control' and
>> 'shift'.  Modern Emacs have two other keys 'hyper' and 'super' (abbr h
>> and s), which various keys on the keyboard can be bound to.  In my
>> experience the Apple key yields either super or hyper in Emacs, but
>> that may depend on Emacs version.
>>
>> You figure this out by pressing C-h k again:
>>  on my apply laptop when I press
>>  C-h k Apple+Return
>> I get
>>  <H-return> is undefined.
>
> Okay, I got <A-return> is undefined. If I replace "hyper" by "A" below, it works! :-))) Thanks a lot!

This is probably a "hack" by Aquamacs.  They have done a _lot_ to
customize Emacs, to make it more Mac-like, so some things work
slightly differently.  I use Cocoa Emacs myself, which is "standard
emacs".

Kasper

>>
>> So now I have the key and the function.  All that remains to do is
>> bind it.  Use something like
>>  (add-hook 'ess-mode-hook
>>         (lambda ()
>>           (define-key ess-mode-map [(hyper return)] 'ess-smart-underscore)
>> ))
>>
>> This defines the key only in ess-mode.  If you have other modes where
>> you want to bind it, you need to figure out what the hook and mode-map
>> is called, but it is usually (always I think) the name of the mode.
>>
>> Kasper
>>
>>
>> On Sun, Sep 11, 2011 at 8:20 AM, Hofert  Jan Marius
>> <marius.hofert at math.ethz.ch> wrote:
>>> Dear ess-experts,
>>>
>>> I am a new user of Aquamacs and it helps me a lot to have some "native Apple commands" available which I got used to over the last years. I was wondering how I can get ESS to accept the keystroke "Command (= Apple key) + Return" to give me the assignment arrow "<-".
>>> I read some posts I found and tried to adapt those, but Aquamacs reports errors on startup...
>>> I don't need/want to change the smart underscore behavior, I just want to add this additional way of putting in the assignment key "<-".
>>>
>>> Here are things I tried:
>>> ;; define command + return as arrow in R:
>>> (define-key osx-key-mode-map (kbd "A-<return>") 'ess-S-assign-key)
>>> (setq ess-S-assign-key (kbd "A-<return>"))
>>> (ess-toggle-S-assign-key t)
>>> (ess-toggle-underscore nil)
>>>
>>> Obviously, this does not work. I am not even sure if I address the keys correctly, I also tried <RET>, for example. For the Apple key, I am also not sure if "A" is correct (however, I found it under http://www.emacswiki.org/emacs/CustomizeAquamacs)
>>> I tried either one of the first two lines, the second I found online, the first is similar to what I found out to define a keystroke for "eval buffer till here" (which works well and even shows up in the menus):
>>> (define-key osx-key-mode-map (kbd "C-c C-<up>") 'ess-eval-buffer-from-beg-to-here)
>>>
>>> Cheers,
>>>
>>> Marius
>>>
>>>
>>>
>>> ETH Zurich
>>> Dr. Marius Hofert
>>> RiskLab, Department of Mathematics
>>> HG E 65.2
>>> Rämistrasse 101
>>> 8092 Zurich
>>> Switzerland
>>>
>>> Phone +41 44 632 2423
>>> marius.hofert at math.ethz.ch
>>> http://www.math.ethz.ch/~hofertj
>>>
>>> ______________________________________________
>>> ESS-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/ess-help
>>>
>
> ETH Zurich
> Dr. Marius Hofert
> RiskLab, Department of Mathematics
> HG E 65.2
> Rämistrasse 101
> 8092 Zurich
> Switzerland
>
> Phone +41 44 632 2423
> marius.hofert at math.ethz.ch
> http://www.math.ethz.ch/~hofertj
>
>