Callback events

Getting started with OneConfig's callback-based events system is familiar, easy to learn and fast. If you've worked with FabricMC or QuiltMC before, you'll already be familiar with how these function.

Registering a listener & listening for events

Registering a listener is as simple as defining the class of the event you'd like to listen to, and providing a callback to be executed whenever that event is dispatched. This can be done via OneConfig's EventManager, like so:

Java

public void setupEvents() {
    EventManager.register(TickEvent.Start.class, event -> System.out.println("Tick tick tick!"));
}

Kotlin

fun setupEvents() {
    EventManager.register(TickEvent.Start::class.java) { event ->
        println("Tick tick tick!")
    }
}

And that's it! Now, from this example, you'll be listening to the TickEvent.Start event, and every time a new game tick starts, it will print "Tick tick tick!" so long as our setupEvents method/function is executed at least once in it's lifetime.

Kotlin DSL

There is also a Kotlin DSL for an improved developer experience with event listeners:

eventHandler { event: TickEvent.Start ->
    println("Tick tick tick!")
}.register()