get-data in clipboard-client%

Called when a process requests clipboard data while this client is the current one for the clipboard. The requested format is passed to the method, and the result should be a byte string matching the requested format, or #f if the request cannot be fulfilled.

Only data format names in the client's list will be passed to this method; see add-type.

When this method is called by the clipboard, the current eventspace is the same as the client's eventspace. If, at the point of the clipboard request, the current eventspace is not the client's eventspace, then current thread is guaranteed to be the handler thread of the client's eventspace.

• (send a-clipboard-client get-data format) -> byte string or #f
   format : string

  The format string is typically four capital letters. (Under Mac OS X, only four characters for format are ever used.) For example, "TEXT" is the name of the UTF-8-encoded string format. New format names can be used to communicate application- and platform-specific data formats.