scroll-to in editor<%>

Called (indirectly) by snips within the editor: it causes the editor to be scrolled so that a given location range within a given snip is visible. If the editor is scrolled, #t is returned, otherwise #f is returned.

• (send an-editor scroll-to snip localx localy width height refresh? bias) -> boolean
     snip : snip% object
     localx : real number
     localy : real number
     width : non-negative real number
     height : non-negative real number
     refresh? : boolean
     bias = 'none : symbol in '(start end none)

  The localx, localy, width, and height arguments specify the area that needs to be visible in snip's coordinate system.

  When the specified region cannot fit in the visible area, bias indicates which end of the region to display. When bias is 'start, then the top-left of the region is displayed. When bias is 'end, then the bottom-right of the region is displayed. Otherwise, bias must be 'none.