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From: southern@neit.cgd.ucar.edu
Newsgroups: comp.emacs
Subject: toggling key definitions
Message-ID: <9322@ncar.ucar.edu>
Date: 28 Nov 90 19:32:39 GMT
Sender: news@ncar.ucar.edu
Reply-To: southern@neit.cgd.ucar.edu ()
Organization: Climate and Global Dynamics Division/NCAR, Boulder, CO
Lines: 44

As a new Emacs user coming from years in a CMS/Xedit environment, it
didn't take long for the level of the features that I am trying to
build into my .emacs file to outstripped my ability to correctly write
and impliment them.  So, I'm hoping to get some guidance on a couple of
definitions.

First, there are a number of complimentary commands that I would like
 to define in such a manner that they are toggled by a single key.
 These include:
 1.  moving between the beginning and end-of-line, 
 2.  moving between the beginning and end-of-buffer, 
 3.  issuing start and end-kbd-macro commands.

 For example, I currently define my 7 and 8 keypad keys to begin and end a
 keyboard macro definition as such:

 (define-key function-keymap "7" 'start-kbd-macro)         ;NCD [7]
 (define-key function-keymap "8" 'end-kbd-macro)           ;NCD [8]

 I would like to use only one key to toggle between the start-kbd-macro
 and end-kbd-macro commands such that:
  if I currently am not defining a keyboard macro, 7 maps to start-kbd-macro 
  if I currently am     defining a keyboard macro, 7 maps to end-kbd-macro.

 Similarly, I would like to define a single key which bounces me
 between the beginning and end-of-line and another to bounce between
 beginning and end-of-buffer.

 Can anyone show me a simple generic method to do this for the various
 cases that I'm currently working on as well as others which might crop
 up in the future.

The second definition I would like to make may be similar to the
 first.  When I scroll-down through a buffer and reach the last full
 screen, the cursor is left a number of lines up from the bottom of the
 buffer and I get a beep and a "End of buffer" message.  I would like
 to define the scroll-down such that when I reach the last full screen
 and issue another scroll-down, the cursor is placed at the
 end-of-buffer rather than being left a half screen up.


                                     Thanks,
                                     Lawrence Buja
                                     southern@ncar.ucar.edu