/// <reference types="node" />
import { EventEmitter } from 'events';
import Annotation from '../browser/annotation/Annotation';
import ImageSource from '../browser/image-source/ImageSource';
import Viewer from './viewer/Viewer';
/**
 * A composition is a combination of one imageSource and
 * an arbitrary number of annotations.
 */
export default class Composition extends EventEmitter {
    /**
     * The image source that is associated with this composition.
     * Do not modify this directly: Use the accessor methods instead.
     */
    readonly imageSource: ImageSource;
    /**
     * List of viewers that are associated with this composition.
     * Do not modify this directly: Use the accessor methods instead.
     */
    viewers: Viewer[];
    /**
     * List of annotations that are associated with this composition.
     * Do not modify this directly: Use the accessor methods instead.
     */
    annotations: Annotation[];
    private imageReady;
    constructor(imageSource: ImageSource);
    /**
     * Adds a viewer to the internal list.
     * This method will be called automatically by a viewer.
     * End-users should not call this manually.
     */
    registerViewer(viewer: Viewer): void;
    /**
     * Removes a viewer from the internal list.
     * This method will be called automatically by a viewer.
     * End-users should not call this manually.
     */
    unregisterViewer(viewer: Viewer): void;
    /**
     * Adds an annotation to this composition.
     */
    addAnnotation(annotation: Annotation): void;
    /**
     * Removes an annotation from this composition.
     */
    removeAnnotation(annotation: Annotation): void;
    /**
     * Remove all annotations.
     */
    removeAllAnnotations(): void;
    /**
     * Re-renders annotations in all of the associated viewers.
     * @param viewer Specify the viewer to update.
     */
    annotationUpdated(viewer?: Viewer | Viewer[]): void;
    dispatchAnnotationChanging(annotation: Annotation): void;
    dispatchAnnotationChange(annotation: Annotation): void;
}