import type { IPoint } from '../../../interfaces/IPoint.js';
export declare function getCanvasPointAtViewportCenter(viewportWidth: number, viewportHeight: number, zoomFactor: number, canvasOffset: IPoint): IPoint;
export declare class ZoomHoldRepeater {
    private _repeatDelay;
    private _repeatRate;
    private _repeatTimeout;
    private _repeatInterval;
    constructor(_repeatDelay?: number, _repeatRate?: number);
    start(initialAction: () => void, repeatAction?: () => void): void;
    stop(): void;
}