import Annotation, { DrawOption } from './Annotation';
import Viewer from '../viewer/Viewer';
import ViewState from '../ViewState';
import ViewerEventTarget from '../interface/ViewerEventTarget';
import ViewerEvent from '../viewer/ViewerEvent';
interface Options {
    color?: string;
}
/**
 * ReferenceLine is a type of annotation which draws how the sections
 * of other viewers which share the same composition intersect with this viewer.
 */
export default class ReferenceLine implements Annotation, ViewerEventTarget {
    private targetViewer;
    /**
     * Color of the reference line.
     */
    color: string;
    private handleType;
    private dragStartPoint3;
    constructor(viewer: Viewer, { color }?: Options);
    private handleViewerStateChange;
    draw(viewer: Viewer, viewState: ViewState, option: DrawOption): void;
    private getReferenceLineOnScreen;
    /**
     * ViewerEventHandler
     */
    mouseMoveHandler(ev: ViewerEvent): void;
    dragStartHandler(ev: ViewerEvent): void;
    dragHandler(ev: ViewerEvent): void;
    dragEndHandler(ev: ViewerEvent): void;
    dispose(): void;
    private lineHitTest;
}
export {};