import { Cartesian3 } from '@cesium/engine';
import { default as Widget } from '../Widget';
declare class ZoomController extends Widget {
    private _zoomInEl;
    private _zoomOutEl;
    private _refreshEl;
    constructor();
    /**
     *
     * @param scene
     * @returns {Cartesian3}
     * @private
     */
    _getCameraFocus(scene: any): Cartesian3;
    /**
     *
     * @param camera
     * @param focus
     * @param scalar
     * @returns {Cartesian3}
     * @private
     */
    _getCameraPosition(camera: any, focus: any, scalar: any): Cartesian3;
    /**
     *
     * @returns {boolean}
     * @private
     */
    _zoomIn(): boolean;
    /**
     *
     * @private
     */
    _refresh(): void;
    /**
     *
     * @returns {boolean}
     * @private
     */
    _zoomOut(): boolean;
    /**
     *
     * @private
     */
    _mountContent(): void;
}
export default ZoomController;