/// <reference types="angular" />
/**
 * Adds event subscription ability to inheriting classes
 */
export declare class EventEmitter {
    private readonly __state;
    private readonly __id;
    /**
     * @param scope   Pass scope when the inheriting object is deep watched. This will create the internal state outside of the object.
     */
    constructor(scope?: angular.IScope);
    private $state;
    /**
     * Invokes all event subscribers
     */
    protected fire(eventName: string, ...args: any[]): EventEmitter;
    /**
     * Invokes all event subscribers, and also keep event in history list.
     */
    protected stream(eventName: string, ...args: any[]): EventEmitter;
    /**
     * Subscribes to event
     *
     * @param invoke  Pass true to immediately invoke the handler if event was already triggered
     * @param scope   Pass scope to automatically remove the handler when scope is destroyed
     */
    on(eventName: string, handler: (...args: any[]) => any, invoke?: boolean, scope?: angular.IScope): EventEmitter;
    /**
     * Subscribes to event, but only for one occurrence of the event.
     *
     * @param invoke  Pass true to immediately invoke the handler if event was already triggered
     */
    onOnce(eventName: string, handler: (...args: any[]) => any, invoke?: boolean): EventEmitter;
    /**
     * Invokes all event subscribers. This is a public version of {@link fire}.
     */
    trigger(eventName: string, ...args: any[]): EventEmitter;
    /**
     * Invokes all event subscribers, but also keep it in history. This is a public version of {@link stream}.
     */
    triggerStream(eventName: string, ...args: any[]): EventEmitter;
    /**
     * Use to update scope reference
     */
    setScope(scope: angular.IScope): EventEmitter;
}