after-move-to (augmentable only) in pasteboard%

Called after a given snip is moved within the editor (and after the display is refreshed; use on-move-to and begin-edit-sequence to avoid extra refreshes when after-move-to modifies the editor).

See also can-move-to? and on-edit-sequence.

No internals locks are set when this method is called.

• (send a-pasteboard after-move-to snip x y dragging?) -> void
     snip : snip% object
     x : real number
     y : real number
     dragging? : boolean

  If dragging? is not #f, then this move was a temporary move for dragging.