Prevent fullcalendar from accepting every "droppable" object

I'm using the jquery "dialog" feature to开发者_如何学编程 provide popup windows with fullcalendar. I use the "modal: true" setting to disable the parent page. However, fullcalendar tries to interact with the modal accepting it as a droppable object. As a result when you drag the modal the calendar days underneath highlight. When you let go the fullcalendar errors....

Or set the option droppable = false.

Got it:

drop-accept: 'div class of object'

under the calendar.