/**
 * ZUI EventEmitter
 * A lightweight event emitter for component communication
 */
import type { EventCallback } from './types';
/**
 * EventEmitter class for handling component events
 */
export declare class EventEmitter {
    private listeners;
    private onceListeners;
    /**
     * Subscribe to an event
     * @param event - Event name
     * @param callback - Callback function
     * @returns Unsubscribe function
     */
    on<T = unknown>(event: string, callback: EventCallback<T>): () => void;
    /**
     * Subscribe to an event once
     * @param event - Event name
     * @param callback - Callback function
     * @returns Unsubscribe function
     */
    once<T = unknown>(event: string, callback: EventCallback<T>): () => void;
    /**
     * Unsubscribe from an event
     * @param event - Event name
     * @param callback - Callback function to remove
     */
    off<T = unknown>(event: string, callback: EventCallback<T>): void;
    /**
     * Emit an event
     * @param event - Event name
     * @param data - Event data
     */
    emit<T = unknown>(event: string, data?: T): void;
    /**
     * Check if event has listeners
     * @param event - Event name
     */
    hasListeners(event: string): boolean;
    /**
     * Get listener count for an event
     * @param event - Event name
     */
    listenerCount(event: string): number;
    /**
     * Remove all listeners for an event or all events
     * @param event - Optional event name
     */
    removeAllListeners(event?: string): void;
    /**
     * Get all event names
     */
    eventNames(): string[];
}
export declare const globalEventBus: EventEmitter;
/**
 * Create a scoped event emitter with prefixed events
 * @param prefix - Event prefix
 */
export declare function createScopedEmitter(prefix: string): EventEmitter;
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