scroll-to

Called by the snip to request scrolling so that the given region is visible. The snip generally needs to be updated after a scroll, but the snip decides whether the update should occur immediately.

The result is #t if the editor is scrolled, #f oitherwise.

The method call is ignored (and the result is #f) if the given snip is not managed by this administrator.

• (send a-snip-admin scroll-to snip localx localy w h refresh? bias) -> boolean
      snip : snip% object
      localx : real number
      localy : real number
      w : non-negative real number
      h : non-negative real number
      refresh? : boolean
      bias = 'none : symbol in '(start end none)

  The localx, localy, w, and h arguments specify a region of the snip to be made visible by the scroll (in snip coordinates).

  If refresh? is not #f, then the editor is requesting to be updated immediately.

  The bias argument is one of:

  • 'start -- if the range doesn't fit in the visible area, show the top-left region
  • 'none -- no special scrolling instructions
  • 'end -- if the range doesn't fit in the visible area, show the bottom-right region