import { Canvas } from '../../interfaces/canvas';
import { DiagramElement, DiagramElementSet } from '../model/diagram-element';
/**
 * Stores the functionality regarding the user highlight of a diagram canvas.
 * @public
 * @see DiagramCanvas
 */
export declare class DiagramUserHighlight extends DiagramElementSet<DiagramElement> {
    #private;
    /**
     * Constructs a user highlight object.
     * @public
     * @param canvas A canvas.
     */
    constructor(canvas: Canvas, highlightSections?: boolean);
    /**
     * Gets the focus of the user highlight, which is the element where the current user highlight started regardless of which other elements were highlighted as a consequence.
     * @public
     * @returns A diagram element.
     */
    getFocus(): DiagramElement | undefined;
    /**
     * Unhighlights all highlighted elements and highlights the given element as the main element of the user highlight.
     * @param element
     */
    focusOn(element: DiagramElement): void;
    add(element: DiagramElement): void;
    clear(): void;
}