import { DrawOptions, IDrawer } from '../types';
export default class PolygonDrawer implements IDrawer {
    private Cesium;
    private viewer;
    private handler;
    private positions;
    private lnglats;
    private entity;
    private tooltip;
    private tempPoints;
    private options;
    private keydownHandler;
    constructor(Cesium: any, viewer: any);
    private isHelperPick;
    private withHiddenHelpers;
    private getPickPosition;
    private syncEntity;
    private undoLastPoint;
    private finishDrawing;
    private bindKeyboardEvents;
    private unbindKeyboardEvents;
    startDrawing(options: DrawOptions): void;
    stopDrawing(): void;
    clear(): void;
}