The PlayerRightClickItem Event is fired shortly before an item's functionality is fired. It is not fired if the player is targetting a block or entity. It can be canceled to prevent any other events from taking place. If the event is canceled, a specific result of allow, deny, or pass can be provided. By default, the result is pass.

You will need to cast the event in the function header as this class:
crafttweaker.event.PlayerRightClickItemEvent
You can, of course, also import the class before and use that name then.

PlayerRightClickItem Events implement the following interfaces and are able to call all of their methods/getters/setters as well:

• IEventCancelable
• PlayerInteract
• IHasCancellationResult

The following information can be retrieved from the event:

ZenGetter	ZenSetter	Type
ZenGetter cancellationResult	ZenSetter cancellationResult	Type string ("success" / "pass" / "fail")
ZenGetter world	ZenSetter ​	Type IWorld
ZenGetter blockState	ZenSetter ​	Type IBlockState
ZenGetter block	ZenSetter ​	Type IBlock
ZenGetter face	ZenSetter ​	Type IFacing
ZenGetter item	ZenSetter ​	Type IItemStack
ZenGetter dimension	ZenSetter ​	Type int
ZenGetter hand	ZenSetter ​	Type string
ZenGetter player	ZenSetter ​	Type IPlayer
ZenGetter canceled	ZenSetter canceled	Type bool

ZenMethods

• event.damageItem(int amount) damages the item by the specified amount
• event.cancel(); Method, returns void (nothing). Can cancel the event and stop something from happening

ZenGetter	ZenSetter	Type
ZenGetter player	ZenSetter ​	Type IPlayer
ZenGetter position	ZenSetter ​	Type IBlockPos
ZenGetter x	ZenSetter ​	Type int
ZenGetter y	ZenSetter ​	Type int
ZenGetter z	ZenSetter ​	Type int
ZenGetter entityLivingBase	ZenSetter ​	Type IEntityLivingBase