My topic is this:
I SYNC data between tvPlanit and a second source. So "add" is fine: The event is triggered, the event data is sent to the other source. And I add it to my sync-source. Modify troubles me a little at the moment, I am not sure, what exactly is done by start edit (is this the name?) and the modify thing. What I need is an interface, which allows me to compare the old values of the event with the new one.
Huge trouble gives me "delete". How can I hinder, that my alternative source grows bigger and bigger and not-actual, because there is no way to find out, when an event from the calendar is deleted?