We are starting to add support for modifying appointments. What is the best way to revert/cancel a modified item?

Imagine a certain type of item that does not apply to the resource that you try to drag it to. What is the best way to go about cancelling the item modification?

An example might be that the logged in user drags a personal TODO item to another user. We would not want to allow them to put their personal TODO items into another person's calendar. But we do want to allow them to move them around on their calendar.

Is there a way to cancel the modification if they try to drop an item in the wrong spot?

Right now, this is for dragging and dropping inside the calendar timetable view that has multiple resources on the calendar.

Thanks in advance for any advice.

Michael

That works! Thanks!