Fullcalendar eventDrop on confirm looks like revert

Question

When i am using eventDrop with a confirm box before processing the drop data it looks like the event is reverting to its original location. When i click on Oke the event is dropped correctly. Does anyone has got a solution for this?

eventDrop: function(event, delta, revertFunc, jsEvent, ui, view) {
if (!confirm("Are you sure about this change?")) {
    revertFunc();
    } else {
    savedrop(event.id,event.start,event.end);
}} 

Answer 1

I found an solution for this. At the beginning of the Eventdrop and/or Eventresize i placed the following:

$('#calendar').fullCalendar('updateEvent', event);

I can than show the confirm and ajax call on confirm to save this with php. Also if this is not confirmed i can still use revertFunc.