do-copy

Called to copy a region of the buffer into the clipboard. This method is provided so that it can be overriden by subclasses. Do not call this method directly; instead, call copy .

• (send a-wx:media-edit do-copy start end time extend?) -> void
      start : small integer
      end : small integer
      time : small integer
      extend? : boolean

  Copy the data from start to end, extending the current clipboard contexnts if extend? is not #f.

  See Cut and Paste for a discussion of the time argument.