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From: norm@athena.mit.edu (Wayne M Miller)
Newsgroups: comp.emacs
Subject: Mode toggle switch
Message-ID: <1991Mar20.183646.9078@athena.mit.edu>
Date: 20 Mar 91 18:36:46 GMT
Sender: news@athena.mit.edu (News system)
Distribution: usa
Organization: Massachusetts Institute of Technology
Lines: 37

I am trying to use the F5 key on my DEC VAX as a mode toggle switch,
in other words, the first press of F5 should put emacs in LaTeX mode,
the next should get C mode, the next should get fundamental mode,
the next should get LaTeX mode once again, etc.  Here is my elisp code:

;; The F5 key is "\e[15~"
(defun my-quick-latex-mode()
  "Quick LaTeX mode."
  (interactive)
  (latex-mode)
  (global-set-key "\e[15~" 'my-quick-c-mode))
(defun my-quick-c-mode()
  "Quick C mode."
  (interactive)
  (c-mode)
  (global-set-key "\e[15~" 'my-quick-fundamental-mode))
(defun my-quick-fundamental-mode()
  "Quick fundamental mode."
  (interactive)
  (fundamental-mode)
  (global-set-key "\e[15~" 'my-quick-latex-mode))
(global-set-key "\e[15~" 'my-quick-latex-mode)

When I hit F5, emacs loads the correct mode, but does not implement it
until I strike a sequence of control characters (i.e.  when I hit F5
the mode line echos "Loading TeX-mode... done!", but remains in
fundamental mode until I type C-g or some other sequence).  I am new
to elisp hacking and so I can't figure out what I did wrong.  If anyone
has any ideas, please email them to the address below.  I'll post the
best reply.

Thank you in advance.
--
==============================================================================
  Love is a snowmobile racing across   |        Wayne M Miller
     the tundra and then suddenly it   |        norm@athena.mit.edu
  flips over, pinning you underneath.  |--------------------------------------