import { Pattern } from "./formats";
type EventCallback<T = unknown> = (data: T) => void;
export interface EventMap {
    fps: string | number;
    population: string | number;
    generation: string | number;
    zoom: string | number;
    step: string | number;
    "mouse:x": string | number;
    "mouse:y": string | number;
    "pan:x": string | number;
    "pan:y": string | number;
    "pattern:load": Pattern;
    "start": boolean;
    "stop": boolean;
}
declare class EventBus {
    #private;
    /**
     * Emit an event with data
     */
    emit<K extends keyof EventMap>(event: K, data: EventMap[K]): void;
    /**
     * Subscribe to an event
     * @returns A function to unsubscribe
     */
    on<K extends keyof EventMap>(event: K, callback: EventCallback<EventMap[K]>): () => void;
    /**
     * Unsubscribe from an event
     */
    off<K extends keyof EventMap>(event: K, callback: EventCallback<EventMap[K]>): void;
    /**
     * Clear all listeners for an event or all events
     */
    clear<K extends keyof EventMap>(event?: K): void;
}
declare const eventBus: EventBus;
export default eventBus;