/**-----------------------------------------------------------------------------------------
* Copyright © 2025 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { Observable } from 'rxjs';
import { LoadMoreRequestArgs } from './load-more-request-args';
/**
 * @hidden
 */
export interface LoadMoreService {
    /**
     * Specifies the callback that will be executed when the load more button is clicked.
     * Providing a `loadMoreNodes` function is only required when additional nodes are fetched from the server on demand.
     */
    loadMoreNodes?: (loadMoreArgs: LoadMoreRequestArgs) => Observable<any[]>;
    /**
     * Specifies the initial number of nodes that will be rendered for the specified data item children group.
     * Every time the load more button is clicked, the data item page size will be incremented with this number.
     */
    getInitialPageSize: (dataItem: any) => number;
    /**
     * Gets the current page size for the targeted data item children collection.
     */
    getGroupSize: (dataItem: any) => number;
    /**
     * Sets the current page size for the targeted data item children collection.
     */
    setGroupSize: (dataItem: any, pageSize: number) => void;
    /**
     * Retrieves the total number of child nodes for the targeted data item.
     *
     * @param dataItem The parent item of the checked group.
     * @param loadedNodesCount The number of already loaded nodes via the `children` function.
     */
    getTotalNodesCount: (dataItem: any, loadedNodesCount: number) => number;
}