The onTimeRangeRightClick event is fired when a user clicks an existing time range selection or selects a time range using right mouse button in the JavaScript Scheduler component. It is fired before the default action is performed (see also timeRangeRightClickHandling) - see also onTimeRangeRightClicked which is fired after the default action.
DayPilot.Scheduler.onTimeRangeRightClick(args);
args.start - selection start (DayPilot.Date)
args.end - selection end (DayPilot.Date)
args.resource - resource ID
args.ctrl
args.meta
args.shift
args.preventDefault()