gtk:widget-tooltip-markup (object)

object -- a gtk:widget object
markup -- a string for the text of the tooltip

The accessor for the tooltip-markup slot gets or sets the contents of the tooltip, which is marked up with the Pango text markup language. This function will take care of setting the has-tooltip property to true and of the default handler for the "query-tooltip" signal.

See also the tooltip-markup property and the gtk:tooltip-set-markup function.