How to redefine a key inside a "minibuffer" mode-map?

Question

I'm trying to redefine the keys used to navigate the history when inside several commands accepting regexps and offering C-p / C-n history navigation. I'd like to use other keys, in addition to C-p / C-n. For example when using occur or replace-regexp, C-p and C-n can be used to go to previous and next elements.

I've tried several things but can't make it work. I think I'm missing the "big picture" here.

Which mode-map do I need to modify, when and how? Everything I tried failed.

P.S: Note that I've got my own minor mode with all my keymaps as adviced here.

Answer 1

I'm assuming you just needed minibuffer-local-map. Subsequent definitions using keys previously assigned to that key map will trump the prior definitions. To disable a prior key assignment, then just create a new definition and set the last portion to nil instead of 'function-name.

(define-key minibuffer-local-map (kbd "<f6>") 'help-for-help)

Here is an excerpt from Emacs Trunk .../lisp/bindings.el:

(let ((map minibuffer-local-map))
  (define-key map "\en"   'next-history-element)
  (define-key map [next]  'next-history-element)
  (define-key map [down]  'next-history-element)
  (define-key map [XF86Forward] 'next-history-element)
  (define-key map "\ep"   'previous-history-element)
  (define-key map [prior] 'previous-history-element)
  (define-key map [up]    'previous-history-element)
  (define-key map [XF86Back] 'previous-history-element)
  (define-key map "\es"   'next-matching-history-element)
  (define-key map "\er"   'previous-matching-history-element)
  ;; Override the global binding (which calls indent-relative via
  ;; indent-for-tab-command).  The alignment that indent-relative tries to
  ;; do doesn't make much sense here since the prompt messes it up.
  (define-key map "\t"    'self-insert-command)
  (define-key map [C-tab] 'file-cache-minibuffer-complete))