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(scroll-bar-drag-1): Set point-before-scroll properly.

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(scroll-bar-scroll-down, scroll-bar-scroll-up): Likewise.
This commit is contained in:
Richard M. Stallman 1995-01-26 07:17:31 +00:00
parent bfbcf12e47
commit 8f37c4f3df
1 changed files with 27 additions and 16 deletions
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43
lisp/scroll-bar.el
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@ -133,17 +133,20 @@ EVENT should be a scroll bar click or drag event."
If you click outside the slider, the window scrolls to bring the slider there."
(interactive "e")
(let* (done)
(or point-before-scroll
(setq point-before-scroll (point)))
(scroll-bar-drag-1 event)
(track-mouse
(while (not done)
(setq event (read-event))
(if (eq (car-safe event) 'mouse-movement)
(setq event (read-event)))
(cond ((eq (car-safe event) 'scroll-bar-movement)
(scroll-bar-drag-1 event))
(t
;; Exit when we get the drag event; ignore that event.
(setq done t)))))))
(let (point-before-scroll)
(track-mouse
(while (not done)
(setq event (read-event))
(if (eq (car-safe event) 'mouse-movement)
(setq event (read-event)))
(cond ((eq (car-safe event) 'scroll-bar-movement)
(scroll-bar-drag-1 event))
(t
;; Exit when we get the drag event; ignore that event.
(setq done t))))))))
(defun scroll-bar-scroll-down (event)
"Scroll the window's top line down to the location of the scroll bar click.
@ -155,9 +158,13 @@ EVENT should be a scroll bar click."
(let* ((end-position (event-end event))
(window (nth 0 end-position))
(portion-whole (nth 2 end-position)))
(select-window window)
(scroll-down
(scroll-bar-scale portion-whole (1- (window-height))))))
(let (point-before-scroll)
(select-window window))
(or point-before-scroll
(setq point-before-scroll (point)))
(let (point-before-scroll)
(scroll-down
(scroll-bar-scale portion-whole (1- (window-height)))))))
(select-window old-selected-window))))
(defun scroll-bar-scroll-up (event)
@ -170,9 +177,13 @@ EVENT should be a scroll bar click."
(let* ((end-position (event-end event))
(window (nth 0 end-position))
(portion-whole (nth 2 end-position)))
(select-window window)
(scroll-up
(scroll-bar-scale portion-whole (1- (window-height))))))
(let (point-before-scroll)
(select-window window))
(or point-before-scroll
(setq point-before-scroll (point)))
(let (point-before-scroll)
(scroll-up
(scroll-bar-scale portion-whole (1- (window-height)))))))
(select-window old-selected-window))))