Re- Scroller's thumbs probl

[bill@cambridge.apple.com (Bill St. Clair)]

>I am not sure if Bill St. Clair's code works because if you click inside the
>*myscroller*,
>it always  reports #@(184 184), not #@(400 400).
>
>I tried to add   
>(setf (scroll-bar-max (ccl::h-scroller self)) x)
> (setf (scroll-bar-max (ccl::v-scroller self)) y)
>to the resize method.  
>
>Now, Clicking initially  shows #@(400 400).  
>But moving the thumb away and back to 0, the scroll-bar-max is 184 again.
>
>I said  I am not sure because I did not know how scroll-bar-limits works.
>Particularly, what's the relationship between scroll-bar-limits and
>scroll-bar-max?
>Setting scroll-bar-limits does not seem to set scroll-bar-max. 

Sorry, I forgot a couple of "CCL::" package prefixes. My code should
have read as follows. This time I actually tried it in an MCL 2.0
instead of in my development CCL. ccl::scroll-bar-limits returns
two values.

1) (make-point h-scroll-bar-min h-scroll-bar-max)
2) (make-point v-scroll-bar-min v-scroll-bar-max)

It is called by ccl::update-scroll-bar-limits, which is called
whenever the scroll bar thumb is moved to 0.

------------------------------------------------------------------------

(require 'scrollers)

(defclass myscroller (ccl::scroller)
  ((limits :initform (cons nil nil)
           :reader scroll-bar-limits-slot)))

(defmethod view-click-event-handler ((self myscroller) where)
  (declare (ignore where))
  (print (point-string (make-point (scroll-bar-max (ccl::h-scroller self))
(scroll-bar-max (ccl::v-scroller self)))))
  (call-next-method))

(setq *w* (make-instance 'window
            :view-size #@(200 200)
            ))

(setq *myscroller* 
           (make-instance 'myscroller
             :view-container *w*
             :track-thumb-p t
             :view-size #@(184 184)
             :view-position #@(0 0)
      ))

(defmethod ccl::scroll-bar-limits ((self myscroller))
  (let ((limits (scroll-bar-limits-slot self))
        (size (view-size self)))
    (values
     (or (car limits) (point-h size))
     (or (cdr limits) (point-v size)))))

(defmethod resize ((self myscroller) x y)
  (let ((limits (scroll-bar-limits-slot self)))
    (setf (car limits) (make-point 0 x))
    (setf (cdr limits) (make-point 0 y)))
  (ccl::update-scroll-bar-limits self)
)

(resize *myscroller* 400 400)