import type { HotInstance } from '../../../core/types';
import type { NestedRows } from '../nestedRows';
import BaseUI from './_base';
/**
 * Minimal interface for DataManager methods used by HeadersUI.
 */
interface NestedRowsDataManager {
    getDataObject(rowIndex: number): Record<string, unknown> | null;
    getRowLevel(rowIndex: number): number;
    hasChildren(rowObject: Record<string, unknown>): boolean;
    cache: {
        levelCount: number;
    };
}
/**
 * Minimal interface for CollapsingUI methods used by HeadersUI.
 */
interface NestedRowsCollapsingUI {
    areChildrenCollapsed(rowIndex: number): boolean;
}
/**
 * Class responsible for the UI in the Nested Rows' row headers.
 *
 * @private
 * @class HeadersUI
 * @augments BaseUI
 */
declare class HeadersUI extends BaseUI {
    /**
     * Reference to the DataManager instance connected with the Nested Rows plugin.
     *
     * @type {object}
     */
    dataManager: NestedRowsDataManager | null;
    /**
     * Reference to the CollapsingUI instance connected with the Nested Rows plugin.
     *
     * @type {object}
     */
    collapsingUI: NestedRowsCollapsingUI | null;
    /**
     * Cache for the row headers width.
     *
     * @type {null|number}
     */
    rowHeaderWidthCache: number | null;
    /**
     * CSS classes used in the row headers.
     *
     * @type {object}
     */
    static get CSS_CLASSES(): {
        indicatorContainer: string;
        parent: string;
        indicator: string;
        emptyIndicator: string;
        button: string;
        expandButton: string;
        collapseButton: string;
    };
    /**
     * Initializes the headers UI component and sets up the data manager reference used to determine nesting levels for each row header.
     */
    constructor(nestedRowsPlugin: NestedRows, hotInstance: HotInstance);
    /**
     * Append nesting indicators and buttons to the row headers.
     *
     * @private
     * @param {number} row Row index.
     * @param {HTMLElement} TH TH 3element.
     */
    appendLevelIndicators(row: number, TH: HTMLTableCellElement): void;
    /**
     * Update the row header width according to number of levels in the dataset.
     *
     * @private
     * @param {number} deepestLevel Cached deepest level of nesting.
     */
    updateRowHeaderWidth(deepestLevel?: unknown): void;
}
export default HeadersUI;