import { Box2, Matrix3, Vector2 } from '@daign/math';
import { StyledGraphicNode } from '../styledGraphicNode';
/**
 * Class for a scalable text element at an anchor position.
 * There is a second point whose distance to the anchor defines the font size. Therefore, the font
 * size scales proportionally. Unproportional scaling, rotation and perspective transformations are
 * not supported.
 */
export declare class ScalableText extends StyledGraphicNode {
    content: string;
    textAnchor: string;
    /**
     * Getter for the anchor position.
     */
    get anchor(): Vector2;
    /**
     * Setter for the anchor position.
     */
    set anchor(position: Vector2);
    /**
     * Getter for the point representing the font size.
     */
    get heightPoint(): Vector2;
    private _fontSize;
    /**
     * Setter for the font size.
     */
    set fontSize(size: number);
    /**
     * Getter for the font size.
     */
    get fontSize(): number;
    /**
     * Constructor.
     */
    constructor();
    /**
     * Calculate the fontSize after a given transformation.
     * @param transformation - The transformation to apply.
     * @returns The transformed fontSize.
     */
    getFontSizeTransformed(transformation: Matrix3): number;
    /**
     * Calculate the anchor after a given transformation.
     * @param transformation - The transformation to apply.
     * @returns The transformed anchor position.
     */
    getAnchorTransformed(transformation: Matrix3): Vector2;
    /**
     * Get an approximated bounding box of the scalable text.
     * @returns The bounding box.
     */
    getBox(): Box2;
}