import DraggableTool from '../DraggableTool';
import ViewerEvent from '../../viewer/ViewerEvent';
import Viewer from '../../viewer/Viewer';
import { Tool } from '../Tool';
/**
 * CelestialRotateTool handles mouse drags and wheel moves on the Viewer and
 * rotates the MPR section accordingly.
 */
export default class CelestialRotateTool extends DraggableTool implements Tool {
    activate(viewer: Viewer): void;
    deactivate(viewer: Viewer): void;
    dragHandler(ev: ViewerEvent): void;
    private rotate;
    private rotateAroundYAxis;
    private rotateAroundXAxis;
}