/// <reference types="node" />
import { EventEmitter } from 'events';
import ViewerEvent from '../../browser/viewer/ViewerEvent';
import ViewerEventTarget from '../interface/ViewerEventTarget';
import Viewer from '../viewer/Viewer';
export interface Tool extends ViewerEventTarget {
    activate(viewer: Viewer): void;
    deactivate(viewer: Viewer): void;
}
/**
 * A tool determines how a viewer intersects with various UI events.
 * An active tool will change the active view state of each viewer.
 */
export default class ToolBaseClass extends EventEmitter implements Tool {
    protected options: object;
    constructor();
    activate(viewer: Viewer): void;
    deactivate(viewer: Viewer): void;
    setOptions(options: object): void;
    mouseUpHandler(viewerEvent: ViewerEvent): void;
    mouseDownHandler(viewerEvent: ViewerEvent): void;
    mouseMoveHandler(viewerEvent: ViewerEvent): void;
    dragStartHandler(viewerEvent: ViewerEvent): void;
    dragHandler(viewerEvent: ViewerEvent): void;
    dragEndHandler(viewerEvent: ViewerEvent): void;
    wheelHandler(viewerEvent: ViewerEvent): void;
}