# Package net.minecraftforge.event.world

- Class Summary
  Class | Description
  --- | ---
  BlockEvent |
  BlockEvent.BreakEvent | Event that is fired when an Block is about to be broken by a player Canceling this event will prevent the Block from being broken.
  BlockEvent.HarvestDropsEvent | Fired when a block is about to drop it's harvested items.
  ChunkDataEvent |
  ChunkDataEvent.Load |
  ChunkDataEvent.Save |
  ChunkEvent |
  ChunkEvent.Load |
  ChunkEvent.Unload |
  ChunkWatchEvent |
  ChunkWatchEvent.UnWatch |
  ChunkWatchEvent.Watch |
  NoteBlockEvent | Base class for Noteblock Events
  NoteBlockEvent.Change | Fired when a Noteblock is changed.
  NoteBlockEvent.Play | Fired when a Noteblock plays it's note.
  WorldEvent |
  WorldEvent.Load |
  WorldEvent.PotentialSpawns | Called by WorldServer to gather a list of all possible entities that can spawn at the specified location.
  WorldEvent.Save |
  WorldEvent.Unload |

- Enum Summary
  Enum | Description
  --- | ---
  NoteBlockEvent.Instrument | Describes the types of musical Instruments that can be played by a Noteblock.
  NoteBlockEvent.Note | Information about the pitch of a Noteblock note.
  NoteBlockEvent.Octave | Describes the Octave of a Note being played by a Noteblock.