import ScreenObserver from './observer/ScreenObserver';
import ScreenViewingSessionConnectionRequest from './session/ScreenViewingSessionConnectionRequest';
export default interface ScreenViewing {
    /**
     * Returns a task for initializing the screen viewing components
     */
    open(request: ScreenViewingSessionConnectionRequest): Promise<void>;
    /**
     * Closes the screen viewing
     */
    close(): Promise<void>;
    /**
     * Starts the screen viewing given a div to create a canvas within
     * @param canvasContainer
     */
    start(canvasContainer: HTMLDivElement): Promise<void>;
    /**
     * Stops the screen viewing
     */
    stop(): Promise<void>;
    /**
     * Changes the presentation policy to scale-to-fit
     */
    presentScaleToFit(): void;
    /**
     * Changes the presentation policy to allow dragging and zooming
     */
    presentDragAndZoom(): void;
    /**
     * Zooms in
     */
    zoomIn(relativeZoomFactor?: number): void;
    /**
     * Zooms out
     */
    zoomOut(relativeZoomFactor?: number): void;
    /**
     * Zooms
     * @param absoluteZoomFactor
     */
    zoom(absoluteZoomFactor: number): void;
    /**
     * Resets zoom
     */
    zoomReset(): void;
    /**
     * Registers signaling observer
     * @param observer
     */
    registerObserver(observer: ScreenObserver): void;
    /**
     * Unregisters signaling observer
     * @param observer
     */
    unregisterObserver(observer: ScreenObserver): void;
}