;;; mwheel.el --- Mouse support for MS intelli-mouse type mice
-;; Copyright (C) 1998, 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1998,2000,2001,2002 Free Software Foundation, Inc.
;; Maintainer: William M. Perry <wmperry@gnu.org>
;; Keywords: mouse
;; new button is bound to mwheel-scroll.
(defun mouse-wheel-change-button (var button)
- (set-default var button)
- (when mouse-wheel-mode
- (mouse-wheel-mode 0)
- (mouse-wheel-mode 1)))
+ (let ((active mouse-wheel-mode))
+ ;; Deactivate before changing the setting.
+ (when active (mouse-wheel-mode -1))
+ (set-default var button)
+ (when active (mouse-wheel-mode 1))))
(defcustom mouse-wheel-down-button 4
- "Mouse button number for scrolling down."
+ "Obsolete. Use `mouse-wheel-down-event'.")
+(defcustom mouse-wheel-down-event
+ ;; In the latest versions of XEmacs, we could just use mouse-%s as well.
+ (intern (format (if (featurep 'xemacs) "button%s" "mouse-%s")
+ mouse-wheel-down-button))
+ "Event used for scrolling down."
:group 'mouse
- :type 'integer
+ :type 'symbol
:set 'mouse-wheel-change-button)
(defcustom mouse-wheel-up-button 5
- "Mouse button number for scrolling up."
+ "Obsolete. Use `mouse-whell-up-event'.")
+(defcustom mouse-wheel-up-event
+ ;; In the latest versions of XEmacs, we could just use mouse-%s as well.
+ (intern (format (if (featurep 'xemacs) "button%s" "mouse-%s")
+ mouse-wheel-up-button))
+ "Event used for scrolling down."
:group 'mouse
- :type 'integer
+ :type 'symbol
:set 'mouse-wheel-change-button)
(defcustom mouse-wheel-scroll-amount '(5 ((shift) . 1) ((control) . nil))
:group 'mouse
:type 'boolean)
-(defcustom mouse-wheel-follow-mouse nil
+(defcustom mouse-wheel-follow-mouse t
"Whether the mouse wheel should scroll the window that the mouse is over.
This can be slightly disconcerting, but some people prefer it."
:group 'mouse
(if (not (fboundp 'event-button))
(defun mwheel-event-button (event)
- (let ((x (symbol-name (event-basic-type event))))
+ (let ((x (event-basic-type event)))
;; Map mouse-wheel events to appropriate buttons
- (if (string-equal "mouse-wheel" x)
+ (if (eq 'mouse-wheel x)
(let ((amount (car (cdr (cdr (cdr event))))))
(if (< amount 0)
- mouse-wheel-up-button
- mouse-wheel-down-button))
- (if (not (string-match "^mouse-\\([0-9]+\\)" x))
- (error "Not a button event: %S" event)
- (string-to-int (substring x (match-beginning 1) (match-end 1)))))))
+ mouse-wheel-up-event
+ mouse-wheel-down-event))
+ x)))
(fset 'mwheel-event-button 'event-button))
(if (not (fboundp 'event-window))
(defun mwheel-scroll (event)
"Scroll up or down according to the EVENT.
This should only be bound to mouse buttons 4 and 5."
- (interactive "e")
+ (interactive (list last-input-event))
(let* ((curwin (if mouse-wheel-follow-mouse
(prog1
(selected-window)
(if (floatp amt) (setq amt (1+ (truncate (* amt (window-height))))))
(when (and mouse-wheel-progessive-speed (numberp amt))
;; When the double-mouse-N comes in, a mouse-N has been executed already,
- ;; So by adding things up we get a squaring up (1, 3, 6, 10, 16, ...).
+ ;; So by adding things up we get a squaring up (1, 3, 6, 10, 15, ...).
(setq amt (* amt (event-click-count event))))
(unwind-protect
(let ((button (mwheel-event-button event)))
- (cond ((= button mouse-wheel-down-button) (scroll-down amt))
- ((= button mouse-wheel-up-button) (scroll-up amt))
+ (cond ((eq button mouse-wheel-down-event) (scroll-down amt))
+ ((eq button mouse-wheel-up-event) (scroll-up amt))
(t (error "Bad binding in mwheel-scroll"))))
(if curwin (select-window curwin)))))
Returns non-nil if the new state is enabled."
:global t
:group 'mouse
- ;; In the latest versions of XEmacs, we could just use
- ;; (S-)*mouse-[45], since those are aliases for the button
- ;; equivalents in XEmacs, but I want this to work in as many
- ;; versions of XEmacs as it can.
- (let* ((prefix (if (featurep 'xemacs) "button%d" "mouse-%d"))
- (dn (intern (format prefix mouse-wheel-down-button)))
- (up (intern (format prefix mouse-wheel-up-button)))
+ (let* ((dn mouse-wheel-down-event)
+ (up mouse-wheel-up-event)
(keys
(nconc (mapcar (lambda (amt) `[(,@(if (consp amt) (car amt)) ,up)])
mouse-wheel-scroll-amount)
;;;###autoload
(defun mwheel-install (&optional uninstall)
"Enable mouse wheel support."
- (mouse-wheel-mode t))
+ (mouse-wheel-mode (if uninstall -1 1)))
(provide 'mwheel)