[ Version ( since = "2.10" ) ]
public delegate void ClipboardRichTextReceivedFunc (Clipboard clipboard, Atom format, uint8? text)
A function to be called when the results of request_rich_text are received, or when the request fails.
The format of the rich text
the rich text received, as a UTF-8 encoded string, or null if retrieving the data failed.
Length of the text.