;;; scroll-bar.el --- window system-independent scroll bar support
;; Copyright (C) 1993, 1994, 1995, 1999, 2000, 2001, 2002, 2003,
-;; 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+;; 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: hardware
"Toggle display of vertical scroll bars on all frames.
This command applies to all frames that exist and frames to be
created in the future.
-With a numeric argument, if the argument is negative,
-turn off scroll bars; otherwise, turn on scroll bars."
+With a numeric argument, if the argument is positive
+turn on scroll bars; otherwise turn off scroll bars."
(interactive "P")
;; Tweedle the variable according to the argument.
(set-scroll-bar-mode (if (if (null flag)
(not scroll-bar-mode)
(setq flag (prefix-numeric-value flag))
- (or (not (numberp flag)) (>= flag 0)))
+ (or (not (numberp flag)) (> flag 0)))
(or previous-scroll-bar-mode
default-frame-scroll-bars))))
\f
;;;; Buffer navigation using the scroll bar.
-;;; This was used for up-events on button 2, but no longer.
+;; This was used for up-events on button 2, but no longer.
(defun scroll-bar-set-window-start (event)
"Set the window start according to where the scroll bar is dragged.
EVENT should be a scroll bar click or drag event."
(let* ((end-position (event-end event))
(window (nth 0 end-position))
(portion-whole (nth 2 end-position)))
- (save-excursion
- (set-buffer (window-buffer window))
+ (with-current-buffer (window-buffer window)
(save-excursion
(goto-char (+ (point-min)
(scroll-bar-scale portion-whole
portion-start
next-portion-start
(current-start (window-start window)))
- (save-excursion
- (set-buffer (window-buffer window))
+ (with-current-buffer (window-buffer window)
(setq portion-start (scroll-bar-drag-position portion-whole))
(setq next-portion-start (max
(scroll-bar-drag-position next-portion-whole)
(let* ((start-position (event-start event))
(window (nth 0 start-position))
(portion-whole (nth 2 start-position)))
- (save-excursion
- (set-buffer (window-buffer window))
- ;; Calculate position relative to the accessible part of the buffer.
- (goto-char (+ (point-min)
- (scroll-bar-scale portion-whole
- (- (point-max) (point-min)))))
- (vertical-motion 0 window)
- (set-window-start window (point)))))
+ (save-excursion
+ (with-current-buffer (window-buffer window)
+ ;; Calculate position relative to the accessible part of the buffer.
+ (goto-char (+ (point-min)
+ (scroll-bar-scale portion-whole
+ (- (point-max) (point-min)))))
+ (vertical-motion 0 window)
+ (set-window-start window (point))))))
(defun scroll-bar-drag (event)
"Scroll the window by dragging the scroll bar slider.
\f
;;;; Bindings.
-;;; For now, we'll set things up to work like xterm.
+;; For now, we'll set things up to work like xterm.
(cond ((and (boundp 'x-toolkit-scroll-bars) x-toolkit-scroll-bars)
(global-set-key [vertical-scroll-bar mouse-1]
'scroll-bar-toolkit-scroll))