what exactly do you have in mind with the combination of MIGX and the fullcalendar - TV?
Ideally, I think it would be great to set up the template variable so that you can view it on a calendar instead of as a list of items. Everything else would function the same--you would click on a date on the calendar and you would get a MigX popup to enter your information. The start date would prepopulate, but you would have the option to change the start date and add end date, start time, and end time. Then you can add whatever other items that you need (ie. title, description, color, filters, etc).
Instead of looking at a list of events, the client would have a better way to manage their calendar.
What I've tried is to duplicate these files to modify:
core/components/migx/elements/tv/migx.tpl
core/components/migx/elements/tv/input/migx.php
core/components/migx/elements/tv/inputoptions/migx.php
Then in the template file, I setup the calendar scripts. I don't know exactly how to call that MigX popup window from the calendar, however. Additionally, when I try to add the input options php (so that I can setup the json in the template variable setup) I get a 500 error on the resource with that template variable.
Any ideas on how I can utilize the FullCalendar to call the MigX popup?