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Scroller(3I)

NAME

   Scroller, HScroller, VScroller - scrolling an interactor

SYNOPSIS

   #include <InterViews/scroller.h>

DESCRIPTION

   A scroller is an interactor that manipulates the perspective of another
   interactor.  It contains a bar whose  position  and  size  reflect  the
   current  origin and size in the interactor's perspective.  Clicking and
   dragging  in  the   scroller   modifies   the   attached   interactor's
   perspective.   VScroller  is  a  class for defining vertical scrollers,
   HScroller for horizontal scrollers.

PUBLIC OPERATIONS

   HScroller(Interactor*, int size = 0)
   VScroller(Interactor*, int size = 0)
          Create a scroller of a  given  size  (height  for  a  horizontal
          scroller,  width for a vertical scroller).  A zero size means to
          use the default size.

   virtual void Update()
          Redisplay the scroller to reflect a change in  the  interactor's
          perspective.

X DEFAULTS

   The  ``syncScroll'' resource specifies whether the scroller should work
   in real-time or not.   When  synchronized  scrolling  is  employed  the
   interactor  scrolls  synchronously  as  the  scroller's bar is dragged;
   otherwise the bar's outline follows the mouse during dragging, and  the
   interactor  is  scrolled  only  after  the user stops dragging the bar.
   Scrollers will scroll synchronously if their syncScroll resource is set
   to  ``on''  or  ``true.''  The state of the syncScroll attribute can be
   toggled temporarily by holding  down  the  ``control''  key  while  the
   scroller is manipulated.

SEE ALSO

   Interactor(3I), Perspective(3I)



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