gtk:calendar-set-detail-func (calendar func)

calendar -- a gtk:calendar widget
func -- a gtk:calendar-detail-func callback function providing details for each day

Installs a function which provides Pango markup with detail information for each day. Examples for such details are holidays or appointments. That information is shown below each day when the show-details property is set. A tooltip containing with full detail information is provided, if the entire text should not fit into the details area, or if the show-details property is not set.

The size of the details area can be restricted by setting the detail-width-chars and detail-height-rows properties.