The IEventManager is what you're gonna need when dealing with event handlers.

It might be required for you to import the class if you encounter any issues.
import crafttweaker.events.IEventManager;

You can access the event manager using the global events field

You can add a function that represents the event and from there on you can decide what you want CrT to do if such an event occurs.
The most important thing to remember is that you need to CAST THE EVENT TO IT'S TYPE! as otherwise you will not be able to access any if it's ZenGetters.
If you simply want to print something where you don't need to access the event, then it's fine.

ZenScript
 Copy
events.onPlayerCrafted(function(event as crafttweaker.event.PlayerCraftedEvent){
    print("event".length);
    print(event.player.name);
    event.player.xp += 1;
});


events.onPlayerLoggedIn(function(event) {
    //event instanceof Object -> No way of accessing it, so better cast!
    print("SOMEONE HAS LOGGED IN!!!");
});

The ZenMethods would be what you'll need to call on events, the Event Class would be what you need to cast the event as.

ZenMethod	Event-Klasse
ZenMethod onAllowDespawn	Event-Klasse crafttweaker.event.EntityLivingSpawnEvent
ZenMethod onArrowLoose	Event-Klasse crafttweaker.event.ArrowLooseEvent
ZenMethod onArrowNock	Event-Klasse crafttweaker.event.ArrowNockEvent
ZenMethod onAnimalTame	Event-Klasse crafttweaker.event.AnimalTameEvent
ZenMethod onBlockBreak	Event-Klasse crafttweaker.event.BlockBreakEvent
ZenMethod onBlockHarvestDrops	Event-Klasse crafttweaker.event.BlockHarvestDrops
ZenMethod onBlockNeighborNotify	Event-Klasse crafttweaker.event.BlockNeighborNotifyEvent
ZenMethod onBlockPlace	Event-Klasse crafttweaker.event.BlockPlaceEvent
ZenMethod onCheckSpawn	Event-Klasse crafttweaker.event.EntityLivingExtendedSpawnEvent
ZenMethod onClientTick	Event-Klasse crafttweaker.event.ClientTickEvent
ZenMethod onCommand	Event-Klasse crafttweaker.event.CommandEvent
ZenMethod onCriticalHit	Event-Klasse crafttweaker.event.CriticalHitEvent
ZenMethod onCropGrowPost	Event-Klasse crafttweaker.event.CropGrowPostEvent
ZenMethod onCropGrowPre	Event-Klasse crafttweaker.event.CropGrowPreEvent
ZenMethod onEnchantmentLevelSet	Event-Klasse crafttweaker.event.EnchantmentLevelSetEvent
ZenMethod onEnderTeleport	Event-Klasse crafttweaker.event.EnderTeleportEvent
ZenMethod onEntityLivingAttacked	Event-Klasse crafttweaker.event.EntityLivingAttackedEvent
ZenMethod onEntityLivingDamage	Event-Klasse crafttweaker.event.EntityLivingDamageEvent
ZenMethod onEntityLivingDeath	Event-Klasse crafttweaker.event.EntityLivingDeathEvent
ZenMethod onEntityLivingDeathDrops	Event-Klasse crafttweaker.event.EntityLivingDeathDropsEvent
ZenMethod onEntityLivingEquipmentChange	Event-Klasse crafttweaker.event.EntityLivingEquipmentChangeEvent
ZenMethod onEntityLivingFall	Event-Klasse crafttweaker.event.EntityLivingFallEvent
ZenMethod onEntityLivingHeal	Event-Klasse crafttweaker.event.EntityLivingHealEvent
ZenMethod onEntityLivingHurt	Event-Klasse crafttweaker.event.EntityLivingHurtEvent
ZenMethod onEntityLivingJump	Event-Klasse crafttweaker.event.EntityLivingJumpEvent
ZenMethod onEntityLivingUpdate	Event-Klasse crafttweaker.event.EntityLivingUpdateEvent
ZenMethod onEntityLivingUseItem	Event-Klasse crafttweaker.event.EntityLivingUseItemEvent.All
ZenMethod onEntityLivingUseItemFinish	Event-Klasse crafttweaker.event.EntityLivingUseItemEvent.Finish
ZenMethod onEntityLivingUseItemStart	Event-Klasse crafttweaker.event.EntityLivingUseItemEvent.Start
ZenMethod onEntityLivingUseItemStop	Event-Klasse crafttweaker.event.EntityLivingUseItemEvent.Stop
ZenMethod onEntityLivingUseItemTick	Event-Klasse crafttweaker.event.EntityLivingUseItemEvent.Tick
ZenMethod onEntityJoinWorld	Event-Klasse crafttweaker.event.EntityJoinWorldEvent
ZenMethod onEntityMount	Event-Klasse crafttweaker.event.EntityMountEvent
ZenMethod onEntityTravelToDimension	Event-Klasse crafttweaker.event.EntityTravelToDimensionEvent
ZenMethod onEntityStruckByLightning	Event-Klasse crafttweaker.event.EntityStruckByLightningEvent
ZenMethod onExplosionDetonate	Event-Klasse crafttweaker.event.ExplosionDetonateEvent
ZenMethod onExplosionStart	Event-Klasse crafttweaker.event.ExplosionStartEvent
ZenMethod onFarmlandTrample	Event-Klasse crafttweaker.event.FarmlandTrampleEvent
ZenMethod onItemExpire	Event-Klasse crafttweaker.event.ItemExpireEvent
ZenMethod onItemFished	Event-Klasse crafttweaker.event.ItemFishedEvent
ZenMethod onItemToss	Event-Klasse crafttweaker.event.ItemTossEvent
ZenMethod onLivingDestroyBlock	Event-Klasse crafttweaker.event.LivingDestroyBlockEvent
ZenMethod onLivingExperienceDrop	Event-Klasse crafttweaker.event.LivingExperienceDropEvent
ZenMethod onLivingKnockBack	Event-Klasse crafttweaker.event.LivingKnockBackEvent
ZenMethod onLootingLevel	Event-Klasse crafttweaker.event.LootingLevelEvent
ZenMethod onMinecartCollision	Event-Klasse crafttweaker.event.MinecartCollisionEvent
ZenMethod onMinecartInteract	Event-Klasse crafttweaker.event.MinecartInteractEvent
ZenMethod onMobGriefing	Event-Klasse crafttweaker.event.MobGriefingEvent
ZenMethod onPlayerAdvancement	Event-Klasse crafttweaker.event.PlayerAdvancement
ZenMethod onPlayerAnvilRepair	Event-Klasse crafttweaker.event.PlayerAnvilRepairEvent
ZenMethod onPlayerAnvilUpdate	Event-Klasse crafttweaker.event.PlayerAnvilUpdateEvent
ZenMethod onPlayerAttackEntity	Event-Klasse crafttweaker.event.PlayerAttackEntityEvent
ZenMethod onPlayerBonemeal	Event-Klasse crafttweaker.event.PlayerBonemealEvent
ZenMethod onPlayerBreakSpeed	Event-Klasse crafttweaker.event.PlayerBreakSpeed
ZenMethod onPlayerBrewedPotion	Event-Klasse crafttweaker.event.PlayerBrewedPotion
ZenMethod onPlayerChangedDimension	Event-Klasse crafttweaker.event.PlayerChangedDimensionEvent
ZenMethod onPlayerClone	Event-Klasse crafttweaker.event.PlayerCloneEvent
ZenMethod onPlayerCloseContainer	Event-Klasse crafttweaker.event.PlayerCloseContainerEvent
ZenMethod onPlayerCrafted	Event-Klasse crafttweaker.event.PlayerCraftedEvent
ZenMethod onPlayerDeathDrops	Event-Klasse crafttweaker.event.PlayerDeathDropsEvent
ZenMethod onPlayerDestroyItem	Event-Klasse crafttweaker.event.PlayerDestroyItem
ZenMethod onPlayerFillBucket	Event-Klasse crafttweaker.event.PlayerFillBucketEvent
ZenMethod onPlayerInteract	Event-Klasse crafttweaker.event.PlayerInteractEvent
ZenMethod onPlayerInteractBlock	Event-Klasse crafttweaker.event.PlayerInteractBlockEvent
ZenMethod onPlayerInteractEntity	Event-Klasse crafttweaker.event.PlayerInteractEntityEvent
ZenMethod onPlayerItemPickup	Event-Klasse crafttweaker.event.PlayerItemPickupEvent
ZenMethod onPlayerLeftClickBlock	Event-Klasse crafttweaker.event.PlayerLeftClickBlockEvent
ZenMethod onPlayerLoggedIn	Event-Klasse crafttweaker.event.PlayerLoggedInEvent
ZenMethod onPlayerLoggedOut	Event-Klasse crafttweaker.event.PlayerLoggedOutEvent
ZenMethod onPlayerOpenContainer	Event-Klasse crafttweaker.event.PlayerOpenContainerEvent
ZenMethod onPlayerPickupItem	Event-Klasse crafttweaker.event.PlayerPickupItemEvent
ZenMethod onPlayerPickupXp	Event-Klasse crafttweaker.event.PlayerPickupXpEvent
ZenMethod onPlayerRespawn	Event-Klasse crafttweaker.event.PlayerRespawnEvent
ZenMethod onPlayerRightClickItem	Event-Klasse crafttweaker.event.PlayerRightClickItemEvent
ZenMethod onPlayerSetSpawn	Event-Klasse crafttweaker.event.PlayerSetSpawn
ZenMethod onPlayerSleepInBed	Event-Klasse crafttweaker.event.PlayerSleepInBedEvent
ZenMethod onPlayerSmelted	Event-Klasse crafttweaker.event.PlayerSmeltedEvent
ZenMethod onPlayerTick	Event-Klasse crafttweaker.event.PlayerTickEvent
ZenMethod onPlayerUseHoe	Event-Klasse crafttweaker.event.PlayerUseHoeEvent
ZenMethod onPlayerVisibility	Event-Klasse crafttweaker.event.PlayerVisibilityEvent
ZenMethod onPortalSpawn	Event-Klasse crafttweaker.event.PortalSpawnEvent
ZenMethod onPotionBrewPost	Event-Klasse crafttweaker.event.PotionBrewPostEvent
ZenMethod onPotionBrewPre	Event-Klasse crafttweaker.event.PotionBrewPreEvent
ZenMethod onProjectileImpactArrow	Event-Klasse crafttweaker.event.ProjectileImpactArrowEvent
ZenMethod onProjectileImpactFireball	Event-Klasse crafttweaker.event.ProjectileImpactFireballEvent
ZenMethod onProjectileImpactThrowable	Event-Klasse crafttweaker.event.ProjectileImpactThrowableEvent
ZenMethod onRenderTick	Event-Klasse crafttweaker.event.RenderTickEvent
ZenMethod onServerTick	Event-Klasse crafttweaker.event.ServerTickEvent
ZenMethod onSleepingLocationCheck	Event-Klasse crafttweaker.event.SleepingLocationCheckEvent
ZenMethod onSleepingTimeCheck	Event-Klasse crafttweaker.event.SleepingTimeCheckEvent
ZenMethod onSpecialSpawn	Event-Klasse crafttweaker.event.EntityLivingExtendedSpawnEvent
ZenMethod onWorldTick	Event-Klasse crafttweaker.event.WorldTickEvent

ZenScript
 Copy
events.clear();