import { Rect } from "../../Core/Rect";
import { RegionData } from "../../Core/RegionData";
import { IAnchorMixin } from "../../Interface/IAnchorMixin";
import { EventListeners } from "../../Interface/IEventDescriptor";
import { IRegionCallbacks } from "../../Interface/IRegionCallbacks";
import { AnchorsComponent } from "../Component/AnchorsComponent";
export declare class BezierController implements IAnchorMixin {
    private anchorComponent;
    private paper;
    private paperRect;
    private regionData;
    private anchorsNode;
    private callbacks;
    /**
     * The array of bezier control point elements.
     */
    private controlPoints;
    /**
     * Bezier control ghost anchor
     */
    private controlGhostAnchor;
    private activeControlPointId?;
    private createAnchor;
    private subscribeToEvents;
    private dragOrigin?;
    private isDragged;
    constructor(anchorComponent: AnchorsComponent, paper: Snap.Paper, paperRect: Rect, regionData: RegionData, anchorsNode: Snap.Element, callbacks: IRegionCallbacks, createAnchor: (paper: Snap.Paper, x: number, y: number, style?: string, r?: number) => Snap.Element, subscribeToEvents: (listeners: EventListeners) => void);
    buildAnchors(): void;
    redraw(): void;
    private updateControlPoints;
    private subscribeControlPointToEvents;
    /**
     * Helper function to create a bezier control point.
     * @param paper - The `Snap.Paper` object to draw on.
     * @param x - The `x`-coordinate of the anchor.
     * @param y - The `y`-coordinate of the anchor.
     * @param r - The radius of the anchor.
     */
    private createControlPoint;
    /**
     * Helper function to create a bezier control point tangent line.
     * @param paper - The `Snap.Paper` object to draw on.
     * @param polylinePoints - Points to draw line on
     */
    private createControlPointTangent;
    /**
     * Create Snap elements for control point and control point tangent line, in a group.
     * @param index - Index of line segment/control data
     * @param line - Line segment
     * @param control - Bezier control
     * @param pointName - `"c1" | "c2"` The point name id of the bezier control
     * @returns Group containing the control point element and its tangent line.
     */
    private createControlPointGroup;
    /**
     * Creates SnapSVG UI of control points of each bezier control.
     */
    private buildControlPoints;
    private subscribeControlGhostToEvents;
    private getActiveControlPoint;
    private updateRegion;
}