import { AppBase } from 'playcanvas';
import { AsyncElement } from './async-element';
/**
 * The AppElement interface provides properties and methods for manipulating
 * {@link https://developer.playcanvas.com/user-manual/web-components/tags/pc-app/ | `<pc-app>`} elements.
 * The AppElement interface also inherits the properties and methods of the
 * {@link HTMLElement} interface.
 */
declare class AppElement extends AsyncElement {
    /**
     * The canvas element.
     */
    private _canvas;
    private _alpha;
    private _backend;
    private _antialias;
    private _depth;
    private _stencil;
    private _highResolution;
    private _hierarchyReady;
    private _picker;
    private _hasPointerListeners;
    private _hoveredEntity;
    private _pointerHandlers;
    /**
     * The PlayCanvas application instance.
     */
    app: AppBase | null;
    /**
     * Creates a new AppElement instance.
     *
     * @ignore
     */
    constructor();
    connectedCallback(): Promise<void>;
    disconnectedCallback(): void;
    _onWindowResize(): void;
    _pickerCreate(): void;
    _pickerDestroy(): void;
    private _getPickerCoordinates;
    _onPointerMove(event: PointerEvent): void;
    _onPointerDown(event: PointerEvent): void;
    _onPointerUp(event: PointerEvent): void;
    _onPointerListenerAdded(type: string): void;
    _onPointerListenerRemoved(type: string): void;
    /**
     * Sets the alpha flag.
     * @param value - The alpha flag.
     */
    set alpha(value: boolean);
    /**
     * Gets the alpha flag.
     * @returns The alpha flag.
     */
    get alpha(): boolean;
    /**
     * Sets the antialias flag.
     * @param value - The antialias flag.
     */
    set antialias(value: boolean);
    /**
     * Gets the antialias flag.
     * @returns The antialias flag.
     */
    get antialias(): boolean;
    /**
     * Sets the graphics backend.
     * @param value - The graphics backend ('webgpu', 'webgl2', or 'null').
     */
    set backend(value: 'webgpu' | 'webgl2' | 'null');
    /**
     * Gets the graphics backend.
     * @returns The graphics backend.
     */
    get backend(): "webgpu" | "webgl2" | "null";
    /**
     * Sets the depth flag.
     * @param value - The depth flag.
     */
    set depth(value: boolean);
    /**
     * Gets the depth flag.
     * @returns The depth flag.
     */
    get depth(): boolean;
    /**
     * Gets the hierarchy ready flag.
     * @returns The hierarchy ready flag.
     * @ignore
     */
    get hierarchyReady(): boolean;
    /**
     * Sets the high resolution flag. When true, the application will render at the device's
     * physical resolution. When false, the application will render at CSS resolution.
     * @param value - The high resolution flag.
     */
    set highResolution(value: boolean);
    /**
     * Gets the high resolution flag.
     * @returns The high resolution flag.
     */
    get highResolution(): boolean;
    /**
     * Sets the stencil flag.
     * @param value - The stencil flag.
     */
    set stencil(value: boolean);
    /**
     * Gets the stencil flag.
     * @returns The stencil flag.
     */
    get stencil(): boolean;
    static get observedAttributes(): string[];
    attributeChangedCallback(name: string, _oldValue: string, newValue: string): void;
}
export { AppElement };