import { Component } from "../Component";
import { ActivityViaViewportSystem } from "../Systems/ActivityViaViewportSystem";
import { Rectangle } from "pixi.js";
export declare class ActivityViaViewportComponent extends Component {
    static readonly id: string;
    protected static readonly _system: typeof ActivityViaViewportSystem;
    private _viewportRef;
    private _frameInterval;
    private _frameCounter;
    private _recursive;
    constructor(_viewportRef: Rectangle, _recursive?: boolean);
    onAttach(): void;
    onComponentAttached(_componentId: string, _component: Component): void;
    onDetach(): void;
}