Im using the Fullcalendar Control and implemented the eventOrder function as described - it works perfect, however it gets only called for events of same length. I would like to know how to customize the Control in order to get the eventOrder function called for all events (even events that span across a single day). I have a custom sort attribute pre-calculated.

Im using the Oracle Application Express Framework and the only way I have to put a custom sort attribute is to provide that into a CSS class.

Inside the eventOrder function which I will outline below you see how I have implemented it.

The calendar picture shows exactly where the error is: one event is spanned over 2 days and is not put below the event, in case the event is only for one day, the function gets called and the sort order works. ( I see it in the breakpoint)

Calendar with wrong sort order:

pOptions.eventOrder = function(a, b) {
  var result = 0;
  //if (a.id == '17399' || b.id == '17399') 
  //    alert(a.title + ' vs ' + b.title);
    
  if (parseInt(a.className[0]) > parseInt(b.className[0])) {
    result = 1;
  }
  if (parseInt(a.className[0]) < parseInt(b.className[0])) {
    result = -1;
  }
  return result;
};

The version of the FullCalendar seems to be 3.10.0