import { IContext } from "../engine_types.js";
/**
 * Use the ButtonsFactory to create buttons with icons and functionality
 * Get access to the default buttons by using `ButtonsFactory.instance`
 * The factory will create the buttons if they don't exist yet, and return the existing ones if they do (this allows you to reparent or modify created buttons)
 *
 * @category HTML
*/
export declare class ButtonsFactory {
    private static _instance?;
    /**
     * Get access to the default HTML button factory.
     * Use this to get or create default Needle Engine buttons that can be added to your HTML UI
     * If you want to create a new factory and create new button instances instead of shared buttons, use `ButtonsFactory.create()` instead
     */
    static get instance(): ButtonsFactory;
    /**
     * Get access to the default HTML button factory.
     * Use this to get or create default Needle Engine buttons that can be added to your HTML UI
     * If you want to create a new factory and create new button instances instead of shared buttons, use `ButtonsFactory.create()` instead
     */
    static getOrCreate(): ButtonsFactory;
    /** create a new buttons factory */
    static create(): ButtonsFactory;
    private _fullscreenButton?;
    /**
     * Get the fullscreen button (or undefined if it doesn't exist yet). Call {@link ButtonsFactory.createFullscreenButton} to get or create it
     */
    get fullscreenButton(): HTMLButtonElement | undefined;
    /** Create a fullscreen button (or return the existing one if it already exists) */
    createFullscreenButton(ctx: IContext): HTMLButtonElement | null;
    private _muteButton?;
    /** Get the mute button (or undefined if it doesn't exist yet). Call {@link ButtonsFactory.createMuteButton} to get or create it */
    get muteButton(): HTMLButtonElement | undefined;
    /** Create a mute button (or return the existing one if it already exists) */
    createMuteButton(ctx: IContext): HTMLButtonElement;
    private _qrButton?;
    /**
     * Get the QR code button (or undefined if it doesn't exist yet). Call {@link ButtonsFactory.createQRCode} to get or create it
     */
    get qrButton(): HTMLButtonElement | undefined;
    private _customQRButtonUrl;
    /** Get or set the QR code button URL - this URL will open when scanning the QR code */
    set qrButtonUrl(url: string);
    get qrButtonUrl(): string;
    /** Create a QR code button (or return the existing one if it already exists)
     * The QR code button will show a QR code that can be scanned to open the current page on a phone
     * The QR code will be generated with the current URL when the button is clicked
     * @returns the QR code button element
     */
    createQRCode(opts?: {
        anchorElement?: HTMLElement;
    }): HTMLButtonElement;
    private hideElementDuringXRSession;
}