Variable: transient-mark-mode-hook

transient-mark-mode-hook is a customizable variable defined in simple.el.gz.

Value

nil

Documentation

Hook run after entering or leaving transient-mark-mode(var)/transient-mark-mode(fun).

No problems result if this variable is not bound. add-hook automatically binds it. (This is true for all hook variables.)

Source Code

;; Defined in /usr/src/emacs/lisp/simple.el.gz
(define-minor-mode transient-mark-mode
  "Toggle Transient Mark mode.

Transient Mark mode is a global minor mode.  When enabled, the
region is highlighted with the `region' face whenever the mark
is active.  The mark is \"deactivated\" after certain non-motion
commands, including those that change the text in the buffer, and
during shift or mouse selection by any unshifted cursor motion
command (see Info node `Shift Selection' for more details).

You can also deactivate the mark by typing \\[keyboard-quit] or
\\[keyboard-escape-quit].

Many commands change their behavior when Transient Mark mode is
in effect and the mark is active, by acting on the region instead
of their usual default part of the buffer's text.  Examples of
such commands include \\[comment-dwim], \\[flush-lines], \\[keep-lines],
\\[query-replace], \\[query-replace-regexp], \\[ispell], and \\[undo].
To see the documentation of commands that are sensitive to the
Transient Mark mode, invoke \\[apropos-documentation] and type \"transient\"
or \"mark.*active\" at the prompt."
  :global t
  ;; It's defined in C/cus-start, this stops the d-m-m macro defining it again.
  :variable (default-value 'transient-mark-mode))