(FILECREATED "28-Jun-84 23:20:55" {PHYLUM}<SHRAGER>LISP>SNAPSCROLL.;1
 1561   

      changes to:  (VARS SNAPSCROLLCOMS)
		   (FNS SNAPSCROLLREPAINTFN SNAPSCROLL)
		   (ADVICE SNAPW))


(PRETTYCOMPRINT SNAPSCROLLCOMS)

(RPAQQ SNAPSCROLLCOMS
 ((FNS SNAPSCROLL SNAPSCROLLREPAINTFN)
		       (ADVISE SNAPW)))
(DEFINEQ

(SNAPSCROLL

  [LAMBDA (W)                                                (* Jeff.Shrager "28-Jun-84 23:14")

    (PROG ((WIDTH (WINDOWPROP W (QUOTE WIDTH)))
	   (HEIGHT (WINDOWPROP W (QUOTE HEIGHT)))
	   BITMAP)
          (WINDOWPROP W (QUOTE BITMAP)
		      (SETQ BITMAP (BITMAPCREATE WIDTH HEIGHT 1)))
          (BITBLT W 0 0 BITMAP 0 0 WIDTH HEIGHT (QUOTE INPUT)
		  (QUOTE REPLACE))
          (WINDOWPROP W (QUOTE SCROLLFN)
		      (QUOTE SCROLLBYREPAINTFN))
          (WINDOWPROP W (QUOTE EXTENT)
		      (create
 REGION
			      LEFT ← 0
			      BOTTOM ← 0
			      WIDTH ← WIDTH
			      HEIGHT ← HEIGHT))
          (WINDOWPROP W (QUOTE REPAINTFN)
		      (FUNCTION SNAPSCROLLREPAINTFN))
          (RETURN W])

(SNAPSCROLLREPAINTFN

  [LAMBDA (W R)                                              (* Jeff.Shrager "28-Jun-84 23:19")

    (BITBLT (WINDOWPROP W (QUOTE BITMAP))
	    (fetch
 LEFT R)
	    (fetch
 BOTTOM R)
	    W
	    (fetch
 LEFT R)
	    (fetch
 BOTTOM R)
	    (fetch
 WIDTH R)
	    (fetch
 HEIGHT R)
	    (QUOTE INPUT)
	    (QUOTE REPLACE])
)

(PUTPROPS SNAPW READVICE
 (NIL (AROUND NIL (SNAPSCROLL *))))
(READVISE SNAPW)
(PUTPROPS SNAPSCROLL COPYRIGHT (NONE))
(DECLARE: DONTCOPY
  (FILEMAP (NIL (312 1418 (SNAPSCROLL 322 . 1049) (SNAPSCROLLREPAINTFN 1051 . 1416)))))
STOP