/**-----------------------------------------------------------------------------------------
* Copyright © 2026 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { EventEmitter, OnDestroy, OnChanges, SimpleChanges } from '@angular/core';
import { GridComponent } from '../grid.component';
import { Subscription } from 'rxjs';
import { RowArgs } from './common/row-args';
import * as i0 from "@angular/core";
/**
 * Controls the expanded state of master detail rows in the Grid.
 * Use this directive to manage which detail rows are expanded or collapsed.
 * ([see example](https://www.telerik.com/kendo-angular-ui/components/grid/master-detail/expanded-state#built-in-directive))
 *
 * @example
 * ```html
 * <kendo-grid
 *     [kendoGridExpandDetailsBy]="expandDetailsKey"
 *     [expandedDetailKeys]="expandedDetailKeys">
 * </kendo-grid>
 * ```
 * @remarks
 * Applied to: {@link GridComponent}.
 */
export declare class ExpandDetailsDirective implements OnChanges, OnDestroy {
    protected grid: GridComponent;
    /**
     * Fires when the `expandedDetailKeys` collection changes.
     */
    expandedDetailKeysChange: EventEmitter<any[]>;
    /**
     * Sets the item key stored in the `expandedDetailKeys` collection.
     * Accepts a property name or a function that returns a unique key for each data item.
     * ([See example](https://www.telerik.com/kendo-angular-ui/components/grid/master-detail/expanded-state#built-in-directive)).
     */
    get expandDetailsKey(): string | ((dataItem: any) => any);
    set expandDetailsKey(key: string | ((dataItem: any) => any));
    /**
     * @hidden
     * A deprecated alias for setting the `expandDetailsKey` property.
     */
    get expandDetailBy(): string | ((dataItem: any) => any);
    set expandDetailBy(key: string | ((dataItem: any) => any));
    /**
     * Holds the collection of expanded detail row keys.
     * Set this property to control which detail rows are expanded.
     */
    expandedDetailKeys: any[];
    /**
     * Specifies if detail rows are expanded by default.
     * When set to `true`, items in the `expandedDetailKeys` collection are collapsed, and all others are expanded.
     * @default false
     */
    initiallyExpanded: boolean;
    protected expandedState: Set<any>;
    protected lastExpandedState: any[];
    protected _expandBy: any;
    protected subscriptions: Subscription;
    constructor(grid: GridComponent);
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    protected get keyGetter(): any;
    /**
     * @hidden
     */
    isExpanded(args: RowArgs): boolean;
    private toggleState;
    private notifyChange;
    static ɵfac: i0.ɵɵFactoryDeclaration<ExpandDetailsDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ExpandDetailsDirective, "[kendoGridExpandDetailsBy]", ["kendoGridExpandDetailsBy"], { "expandDetailsKey": { "alias": "kendoGridExpandDetailsBy"; "required": false; }; "expandDetailBy": { "alias": "expandDetailBy"; "required": false; }; "expandedDetailKeys": { "alias": "expandedDetailKeys"; "required": false; }; "initiallyExpanded": { "alias": "initiallyExpanded"; "required": false; }; }, { "expandedDetailKeysChange": "expandedDetailKeysChange"; }, never, never, true, never>;
}