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* scroll-bar.el (scroll-bar-mode): Variable deleted.

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(scroll-bar-mode): Function changed to consult default-frame-alist
	instead of the variable.
This commit is contained in:
Jim Blandy 1993-06-10 12:18:36 +00:00
parent 1c595d45c4
commit ada464a7f3
1 changed files with 30 additions and 22 deletions
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52
lisp/scroll-bar.el
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@ -48,9 +48,6 @@ that scroll bar position."
;;;; Helpful functions for enabling and disabling scroll bars.
;;; This is not documented because you can't change the
;;; mode properly by setting it.
(defvar scroll-bar-mode t)
(defun scroll-bar-mode (flag)
"Toggle display of vertical scroll bars on each frame.
@ -59,25 +56,36 @@ created in the future.
With a numeric argument, if the argument is negative,
turn off scroll bars; otherwise, turn on scroll bars."
(interactive "P")
(setq scroll-bar-mode (if (null flag) (not scroll-bar-mode)
(or (not (numberp flag)) (>= flag 0))))
(mapcar
(function
(lambda (param-name)
(let ((parameter (assq param-name default-frame-alist)))
(if (consp parameter)
(setcdr parameter scroll-bar-mode)
(setq default-frame-alist
(cons (cons param-name scroll-bar-mode)
default-frame-alist))))))
'(vertical-scroll-bars horizontal-scroll-bars))
(let ((frames (frame-list)))
(while frames
(modify-frame-parameters
(car frames)
(list (cons 'vertical-scroll-bars scroll-bar-mode)
(cons 'horizontal-scroll-bars scroll-bar-mode)))
(setq frames (cdr frames)))))
;; Obtain the current setting by looking at default-frame-alist.
(let ((scroll-bar-mode
(let ((assq (assq 'vertical-scroll-bars default-frame-alist)))
(if assq (cdr assq) t))))
;; Tweedle it according to the argument.
(setq scroll-bar-mode (if (null flag) (not scroll-bar-mode)
(or (not (numberp flag)) (>= flag 0))))
;; Apply it to default-frame-alist.
(mapcar
(function
(lambda (param-name)
(let ((parameter (assq param-name default-frame-alist)))
(if (consp parameter)
(setcdr parameter scroll-bar-mode)
(setq default-frame-alist
(cons (cons param-name scroll-bar-mode)
default-frame-alist))))))
'(vertical-scroll-bars horizontal-scroll-bars))
;; Apply it to existing frames.
(let ((frames (frame-list)))
(while frames
(modify-frame-parameters
(car frames)
(list (cons 'vertical-scroll-bars scroll-bar-mode)
(cons 'horizontal-scroll-bars scroll-bar-mode)))
(setq frames (cdr frames))))))
;;;; Buffer navigation using the scroll bar.