The OnClientTimeSlotContextMenuItemClicking client-side event is called when a time slotcontext menu item is clicked, before RadScheduler processes the click event.
Two parameters are passed to the event handler:
sender is the scheduler client object.
eventArgs has the following methods:
get_slot() - the instance of the time slot, on which the context menu was shown.
get_startSlot() - the instance of the first time slot in the slot selection.
get_endSlot() - the instance of the last time slot in the slot selection.
get_item() - the clicked menu item
set_cancel() - used to cancel the event.
This event can be cancelled.