import { ICosmographInternalApi } from "../../../internal";
/**
 * `PolygonalSelect` class provides a freeform polygonal selection tool that can be used to select an area within the Cosmograph visualization.
 * It uses a canvas-based approach to enable interactive selection of an arbitrary polygon region.
 */
export declare class PolygonalSelect {
    private _;
    private _canvas;
    private _ctx;
    private _isDrawing;
    private _points;
    private _onSelectCallback;
    private _resizeObserver?;
    constructor(_: ICosmographInternalApi);
    private _initializeCanvas;
    /**
     * Enables the polygonal selection tool, making it visible and interactive.
     */
    enable(): void;
    /**
     * Disables the polygonal selection tool, hiding it and making it non-interactive.
     */
    disable(): void;
    /**
     * Destroys the polygonal selection tool, removing it from the DOM.
     */
    destroy(): void;
    private _startDrawing;
    private _draw;
    private _stopDrawing;
    private _resizeCanvas;
}