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Re: .emacs - minor mode behavior
From: |
Kevin Rodgers |
Subject: |
Re: .emacs - minor mode behavior |
Date: |
Tue, 13 Feb 2007 20:24:58 -0700 |
User-agent: |
Thunderbird 1.5.0.9 (Macintosh/20061207) |
J K wrote:
I'm just learning Emacs and have recently started working on a .emacs
file for myself. I was hoping someone could answer what I think is
probably a simple question:
During customization of the mode line, I was able to turn on column-
number-mode with the following line in .emacs:
(setq column-number-mode t)
I understand that this line is setting 'column-number-mode to t
(true). I also understand that this variable is created along with
the column-number-mode function by the define-minor-mode macro in
simple.el.
I then proceeded to attempt to add the time to the mode line with the
line:
(setq display-time-mode t)
This doesn't work. I have seen that you can instead call the function
with a positive argument like so:
(display-time-mode 1)
But I don't understand why the first method doesn't work. I think the
problem is that I don't know how emacs goes from variables being set
to t/nil to actually drawing the screen, but I was hoping to avoid
digging that deep as I still am learning. Could someone please help
me to understand?
Some minor modes are simple enough that all you need to do is set a
variable to turn them on. But some are not, in which case the variable
is merely an indicator of whether the mode is on or not.
display-time-mode is one of the latter; see the third sentence of its
doc string:
,----[ C-h v display-time-mode RET ]
| display-time-mode is a variable defined in `time.el'.
| Its value is nil
|
|
| Documentation:
| Non-nil if Display-Time mode is enabled.
| See the command `display-time-mode' for a description of this minor-mode.
| Setting this variable directly does not take effect;
| either customize it (see the info node `Easy Customization')
| or call the function `display-time-mode'.
|
| You can customize this variable.
|
| [back]
`----
Also - I've read quite a few posts in this group, and it seems like
most folks lean toward using customize as opposed to hand
editing .emacs. Am I making things harder on myself?
Perhaps. But since I had used Emacs for about 15 years before custom
came along, I prefer to stick with .emacs.
--
Kevin Rodgers
Denver, Colorado, USA