import ViewerEvent from '../../viewer/ViewerEvent';
import DraggableTool from '../DraggableTool';
import Viewer from '../../viewer/Viewer';
import { Tool } from '../Tool';
/**
 * HandTool is a tool which responds to a mouse drag and moves the
 * MprImageSource in parallel with the screen.
 */
export default class HandTool extends DraggableTool implements Tool {
    activate(viewer: Viewer): void;
    deactivate(viewer: Viewer): void;
    dragHandler(ev: ViewerEvent): void;
    private translateBy;
}