/**
 * Copyright 2019 Google LLC. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/// <reference types="googlemaps" />
import { MarkerClusterer } from "./markerclusterer";
/**
 * Creates a single cluster that manages a group of proximate markers.
 *  Used internally, do not call this constructor directly.
 */
export declare class Cluster {
    private markerClusterer_;
    private map_;
    private minClusterSize_;
    private averageCenter_;
    private markers_;
    private center_;
    private bounds_;
    private clusterIcon_;
    /**
     *
     * @param markerClusterer_ The `MarkerClusterer` object with which this
     *  cluster is associated.
     */
    constructor(markerClusterer_: MarkerClusterer);
    /**
     * Returns the number of markers managed by the cluster. You can call this from
     * a `click`, `mouseover`, or `mouseout` event handler for the `MarkerClusterer` object.
     *
     * @return The number of markers in the cluster.
     */
    getSize(): number;
    /**
     * Returns the array of markers managed by the cluster. You can call this from
     * a `click`, `mouseover`, or `mouseout` event handler for the `MarkerClusterer` object.
     *
     * @return The array of markers in the cluster.
     */
    getMarkers(): google.maps.Marker[];
    /**
     * Returns the center of the cluster. You can call this from
     * a `click`, `mouseover`, or `mouseout` event handler
     * for the `MarkerClusterer` object.
     *
     * @return The center of the cluster.
     */
    getCenter(): google.maps.LatLng;
    /**
     * Returns the map with which the cluster is associated.
     *
     * @return The map.
     * @ignore
     */
    getMap(): google.maps.Map;
    /**
     * Returns the `MarkerClusterer` object with which the cluster is associated.
     *
     * @return The associated marker clusterer.
     * @ignore
     */
    getMarkerClusterer(): MarkerClusterer;
    /**
     * Returns the bounds of the cluster.
     *
     * @return the cluster bounds.
     * @ignore
     */
    getBounds(): google.maps.LatLngBounds;
    /**
     * Removes the cluster from the map.
     *
     * @ignore
     */
    remove(): void;
    /**
     * Adds a marker to the cluster.
     *
     * @param marker The marker to be added.
     * @return True if the marker was added.
     * @ignore
     */
    addMarker(marker: google.maps.Marker & {
        isAdded?: boolean;
    }): boolean;
    /**
     * Determines if a marker lies within the cluster's bounds.
     *
     * @param marker The marker to check.
     * @return True if the marker lies in the bounds.
     * @ignore
     */
    isMarkerInClusterBounds(marker: google.maps.Marker): boolean;
    /**
     * Calculates the extended bounds of the cluster with the grid.
     */
    private calculateBounds_;
    /**
     * Updates the cluster icon.
     */
    updateIcon(): void;
    /**
     * Determines if a marker has already been added to the cluster.
     *
     * @param marker The marker to check.
     * @return True if the marker has already been added.
     */
    private isMarkerAlreadyAdded_;
}