/**
 * A helper for VEllipseSectors.
 *
 * @author   Ikaros Kappler
 * @date     2021-03-24
 * @modified 2025-04-02 Adding `VEllipseSectorHelper.drawHandleLines`.
 * @modified 2025-04-07 Modifying the calculation of `startAngle` and `endAngle` from the rotation control point: wrapping result into [0,TWO_PI).
 * @modified 2025-04-09 Adding the `VEllipseSectorHelper.destroy` method.
 * @modified 2025-05-05 `VEllipseSectorHelper` is now implementing `IShapeInteractionHelper`.
 * @version  1.1.0
 */
import { VEllipseSector } from "../../VEllipseSector";
import { Vertex } from "../../Vertex";
import { DrawLib, IShapeInteractionHelper } from "../../interfaces";
export declare class VEllipseSectorHelper implements IShapeInteractionHelper {
    private sector;
    private startAngleControlPoint;
    private endAngleControlPoint;
    private rotationControlPoint;
    private _rotationControlLine;
    private _startAngleControlLine;
    private _endAngleControlLine;
    private _centerHandler;
    private _rotationHandler;
    private _startAngleHandler;
    private _endAngleHandler;
    constructor(sector: VEllipseSector, startAngleControlPoint: Vertex, endAngleControlPoint: Vertex, rotationControlPoint: Vertex);
    /**
     * Creates a new drag handler for the circle sector's start control point.
     *
     * @private
     * @method _handleDragStartControlPoint
     * @instance
     * @memberof CircleSectorHelper
     * @returns A new event handler.
     */
    private _handleDragCenterPoint;
    private _handleDragRotationControlPoint;
    private _handleDragStartAngleControlPoint;
    private _handleDragEndAngleControlPoint;
    /**
     * Draw grey handle lines.
     *
     * @param {DrawLib<any>} draw - The draw library instance to use.
     * @param {DrawLib<any>} fill - The fill library instance to use.
     */
    drawHandleLines(draw: DrawLib<any>, fill: DrawLib<any>): void;
    /**
     * Destroy this VEllipseHandler which means: all listeners are being removed.
     */
    destroy(): void;
}