on-delete

Called before a range is deleted from the buffer. If the return value is #f, then the delete will be aborted. Otherwise, after-delete is guaranteed to be called after the delete has completed.

The buffer is internally locked for writing during a call to this method (see also Locks). Use after-delete to modify the buffer, if necessary.

See also on-edit-sequence.

• (send a-wx:media-edit on-delete start len) -> boolean
      start : small integer
      len : small integer