Hi, Eli

1: first step
my .emacs only one line
cat ~/.emacs
(warn  "my frame-parameters ----: %s"  (frame-parameters (selected-frame)))

it ouput:
Warning (emacs): my frame-parameters ----: ((parent-id . 23169188)
(explicit-name) (display . :0.0) (visibility . t) (icon-name)
(outer-window-id . 67109031) (window-id . 67109060) (top . 0) (left . 50)
(buried-buffer-list) (buffer-list *scratch*) (unsplittable) (minibuffer .
#<window 4 on  *Minibuf-0*>) (modeline . t) (width . 80) (height . 35) (name
. emacs@host) (environment) (sticky) (cursor-color . black)
(background-mode . light) (display-type . color) (horizontal-scroll-bars .
t) (window-system . x) (alpha) (scroll-bar-width . 16) (cursor-type . box)
(auto-lower) (auto-raise) (icon-type . t) (tool-bar-position . top)
(fullscreen) (wait-for-wm . t) (title) (buffer-predicate) (tool-bar-lines .
1) (menu-bar-lines . 1) (scroll-bar-background . grey75)
(scroll-bar-foreground) (right-fringe . 9) (left-fringe . 9) (line-spacing)
(screen-gamma) (border-color . black) (mouse-color . black)
(background-color . white) (foreground-color . black) (vertical-scroll-bars
. right) (internal-border-width . 0) (border-width . 0) (font-parameter .
Monospace 11) (font . -unknown-DejaVu Sans
Mono-normal-normal-normal-*-15-*-*-*-m-0-iso10646-1) (font-backend xft x))

there were: (explicit-name)  (name . emacs@host)

2: then i comment the line in .emacs of first step.
now it has 2 line
cat ~/.emacs
(setq frame-title-format '("%m @ "("%f" ("%b"))))
(warn (warn))  <-  this will output: Warning (initialization): An error
occurred while loading /home/sand/.emacs  , but in this instance
i can get the right result on title like : C/l @ /home/sand/test.c,   if i
comment this line, no warning message , but  its result will be like:
test.c - emacs@host

3: other
I want to change explicit-name use modify-frame-parameter
(modify-frame-parameter nil '((explicit-name . nil)))
but it doesn't work.

Thank you all the same



On Sun, May 27, 2012 at 2:19 AM, Eli Zaretskii <eliz@gnu.org> wrote:

> > Date: Sat, 26 May 2012 22:05:39 +0800
> > From: ëÀñ½Ü <maolijie@gmail.com>
> >
> > It may be a bug ?
>
> I don't think so.
>
> > cat ~/.emacs
> > (setq frame-title-format '("%m @ "(buffer-file-name "%f" (dired-directory
> > dired-directory "%b"))))
> >
> > I just want to set the frame-title-format to %f for my emacs24.0.95
> >
> > But it don't work,  i can't see the %f format on the title
> >
> > After emacs start, i use C-h v frame-title-format
> > it shows:
> > frame-title-format is a variable defined in `C source code'.
> > Its value is "%b - emacs@host"
>
> You omitted the important part:
>
>  It is used only on frames for which no explicit name has been set
>  (see `modify-frame-parameters').
>
> And if I evaluate
>
>   (frame-parameters (selected-frame))
>
> I see there (explicit-name).  So I think your customization is ignored
> by design.  I think you should set the `title' frame parameter instead.
>
>
>


-- 
ëÀñ½Ü <Mao Lijie>