This kind of functions provide Pango markup with detail information for the
specified day. Examples for such details are holidays or appointments. The
function returns %NULL when no information is available.
aliasGtkCalendarDetailFunc = char* function(GtkCalendar* calendar, uintyear, uintmonth, uintday, void* userData)
This kind of functions provide Pango markup with detail information for the specified day. Examples for such details are holidays or appointments. The function returns %NULL when no information is available.