Callbacks is a mechanism that allows to handle and prevent some of the in-game events as well as user-invoked events. When some native event occurs, all callback functions registered for this event are called. To add a callback to some event, use Callback.addCallback function. To invoke a custom event, use Callback.invokeCallback. To prevent the default flow of the event, use Game.prevent.
All pre-defined (in-game) callbacks with their functions interfaces are listed below. If no function interface is provided, use a function with no params and return value:
ContainerOpened occurs when user opens some container. See ContainerOpenedFunction for details
ContainerClosed occurs when some container is closed. See ContainerClosedFunction for details
CustomWindowOpened occurs when every single window is opened. Called for every window and subwindow. Examples of subwindows include standard inventory, window title, main window, etc. See CustomWindowOpenedFunction for details
CustomWindowClosed occurs when every single window is closed. See CustomWindowClosedFunction for details
CraftRecipePreProvided occurs befor crafting is performed. See CraftRecipePreProvidedFunction for details
CraftRecipeProvided occurs afrer crafting recipe result is determined. See CraftRecipeProvidedFunction for details
VanillaWorkbenchCraft occurs just before adding crafting recipe result to player's inventory. See VanillaWorkbenchCraftFunction for details
VanillaWorkbenchPostCraft occurs after adding crafting recipe result to player's inventory. See VanillaWorkbenchCraftFunction for details
VanillaWorkbenchRecipeSelected occurs when player selects recipe in the workbench. See VanillaWorkbenchRecipeSelectedFunction for details
CoreConfigured occurs when Inner Core default configuration file is loaded. See CoreConfiguredFunction for details
PreLoaded occurs directly after "CoreConfigured" callback
APILoaded occurs directly after "PreLoaded" callback
ModsLoaded occurs directly after "APILoaded" callback
PostLoaded occurs directly after "ModsLoaded" callback. Last of the loading callbacks
AppSuspended occurs when Minecraft application is paused
NativeGuiChanged occurs when vanilla screen changes. See NativeGuiChangedFunction for details
ReadSaves occurs when reading saves from global scope. See SavesFunction for details
WriteSaves occurs when writing saves to global scope. See SavesFunction for details
tick is main game tick. This callback is called 20 times per second and is used to define all dynamic events in the game. Avoid overloading tick functions and use Updatables and TileEntitys when posssible
LevelSelected occurs when the level is selected and will be loaded. See LevelSelectedFunction for details
LevelCreated occurs when level is created in the memory of the device
LevelDisplayed occurs when level is displayed to the player
LevelPreLoaded occurs before some level initialization
LevelLoaded occurs when level is completely loaded and is ready to be displayed to the player
DimensionLoaded occurs when vanilla or custom dimension is loaded. See DimensionLoadedFunction for details
LevelPreLeft occurs when player starts leaving world
LevelLeft occurs when player completes leaving world
PreBlocksDefined occurs before saving block data while loading world
BlocksDefined occurs after saving block data while loading world
DestroyBlock occurs when player breaks block. See DestroyBlockFunction for details
DestroyBlockStart occurs when player starts breaking block. Has the same parameters as "DestroyBlock" callback, see DestroyBlockFunction for details
DestroyBlockContinue occurs when player continues breaking block. Occurs several times during one block breaking. See DestroyBlockContinueFunction for details
BuildBlock occurs when player places block somewhere in the world. See BuildBlockFunction for details
BlockChanged occurs when block changes in the world. To capture this event you should register blocks that you need to watch using World.setBlockChangeCallbackEnabled method. All block changes that are related to the registered blocks trigger this event. See BlockChangedFunction for details
ItemUse occurs when player uses item on some block. Doesn't work if vanilla container is opened (e.g. chest, workbench, etc.). Use "ItemUseLocalServer" to track such events instead. See ItemUseFunction for details
ItemUseLocalServer occurs when player uses some item on the local server. Can be used to prevent vanilla container from opening. See ItemUseFunction for details
FoodEaten occurs when player eats food. See FoodEatenFunction for details
ExpAdd occurs when player gains some experience. See ExpAddFunciton for details
ExpLevelAdd occurs when player gains some experience levels. See ExpLevelAddFunciton for details
NativeCommand occurs when player enters some command. See NativeCommandFunciton for details
PlayerAttack occurs when player attacks some entity. See PlayerAttackFunction for details
EntityInteract occurs when player longclick some entity (interacts with it). See EntityInteractFunction for details
ItemUseNoTarget occurs when an item is used in the air. See ItemUseNoTargetFunction for details
ItemUsingReleased occurs when player doesn't complete using item that has maximum use time set with Item.setMaxUseDuration funciton. See ItemUsingReleasedFunction for details
ItemUsingComplete when player completes using item that has maximum use time set with Item.setMaxUseDuration funciton. See ItemUsingCompleteFunction for details
Explosion occurs when something is exploded in the world. See ExplosionFunction for details
EntityAdded occurs when an entity is added in the world. See EntityAddedFunction for details
EntityRemoved occurs when an entity is removed from the world. See EntityRemovedFunction for details
EntityDeath occurs when an entity dies. See EntityDeathFunction for details
EntityHurt occurs when an entity is hurt. See EntityHurtFunction for details
ProjectileHit occurs when a projectile entity hits entity or block. See ProjectileHitFunction for details
RedstoneSignal occurs when redstone signal changes on the specified coordinates. To register block as redstone consumer, use Block.setRedstoneTile function. See RedstoneSignalFunction for details
PopBlockResources occurs when block is desroyed somehow (not by player). See PopBlockResourcesFunction for details
CustomBlockTessellation occurs when custom block rendering needs to be performed. See CustomBlockTessellationFunction for details
ItemIconOverride occurs when displaying item somewhere to override item's icon. You can use it to change item's icon depending on some item state. See ItemIconOverrideFunction for details
ItemNameOverride occurs when displaying item name to override it. You can use it to display item charge, status, etc. See ItemNameOverrideFunction for details
ItemDispensed occurs when an item is dispenced using dispenser. See [ItemDispensedFunction]] for details
GenerateChunk occurs when generating chunk in overworld. Shoud be used for all generation process. See GenerateChunkFunction for details
GenerateChunkUnderground occurs when generating chunk's underground in overworld. Can be used for all underground generation process (though it is OK to use "GenerateChunk" for it as well). See GenerateChunkFunction for details
GenerateNetherChunk occurs when generating chunk in neather world. See GenerateChunkFunction for details
GenerateEndChunk occurs when generating chunk in end world. See GenerateChunkFunction for details
GenerateChunkUniversal occurs when any chunk is generated. See GenerateChunkFunction for details
GenerateBiomeMap occurs after generating vanilla biome map so that we can modify it before the covers generation. See Biomes for the biomes generation information. See GenerateChunkFunction for details
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