import { AfterViewInit, ElementRef, EventEmitter, OnChanges, OnDestroy, OnInit, QueryList, SimpleChanges, WritableSignal } from '@angular/core';
import { CdkListbox, CdkOption } from '@angular/cdk/listbox';
import { PoListBoxBaseComponent } from './po-listbox-base.component';
import { PoSearchListComponent } from './po-search-list/po-search-list.component';
import { PoDropdownAction } from '../po-dropdown/po-dropdown-action.interface';
import { Observable } from 'rxjs';
export declare class PoListBoxComponent extends PoListBoxBaseComponent implements OnInit, AfterViewInit, OnChanges, OnDestroy {
    element: ElementRef<any>;
    currentItems: Array<PoDropdownAction>;
    currentGroup: PoDropdownAction | null;
    readonly subItemsLoading: WritableSignal<Record<string, boolean>>;
    readonly subItemsError: WritableSignal<Record<string, boolean>>;
    readonly subItemsSkeletonPlaceholders: number[];
    rootLazyLoad?: () => Observable<Array<PoDropdownAction>>;
    rootItemsLoad: EventEmitter<void>;
    contentChange: EventEmitter<void>;
    private readonly loadedSubItems;
    private lastLoadedGroup;
    private rootLoaded;
    private readonly destroySubItems$;
    private readonly navigationStack;
    private readonly renderer;
    private readonly router;
    private readonly changeDetector;
    listbox: ElementRef;
    listboxItemList: ElementRef;
    listboxGroupHeader: ElementRef;
    searchElement: PoSearchListComponent;
    popupHeaderContainer: ElementRef;
    listboxItems: QueryList<ElementRef>;
    cdkListbox?: CdkListbox;
    cdkOptions?: QueryList<CdkOption>;
    private scrollEvent$;
    private subscriptionScrollEvent;
    constructor();
    ngOnInit(): void;
    ngAfterViewInit(): void;
    ngOnChanges(changes?: SimpleChanges): void;
    ngOnDestroy(): void;
    openGroup(group: PoDropdownAction, event?: MouseEvent | KeyboardEvent): void;
    private loadSubItemsAsync;
    onRetryKeydown(event: KeyboardEvent, scope: 'root' | 'subItems'): void;
    retrySubItems(event?: MouseEvent | KeyboardEvent): void;
    loadRootItemsAsync(): void;
    retryRootItems(event?: MouseEvent | KeyboardEvent): void;
    isRootLoading(): boolean;
    isRootError(): boolean;
    isSubItemsLoading(group: PoDropdownAction | null): boolean;
    isSubItemsError(group: PoDropdownAction | null): boolean;
    isFunction(value: unknown): boolean;
    isGroupItem(item: PoDropdownAction): boolean;
    private hasSubItems;
    private getGroupKey;
    private setSubItemsState;
    private clearSubItemsState;
    private focusGroupHeader;
    goBack(event: MouseEvent | KeyboardEvent): void;
    onKeydownGoBack(event: KeyboardEvent, currentGroup?: PoDropdownAction): void;
    protected onKeydownTemplate(event: KeyboardEvent): void;
    onSelectItem(itemListAction: any, event?: MouseEvent | KeyboardEvent): void | Promise<boolean>;
    onSelectAllCheckboxKeyDown(event: KeyboardEvent): void;
    onKeyDown(itemListAction: any, event?: KeyboardEvent): void;
    private handleArrowRightKey;
    private handleEnterOrSpaceKey;
    checkboxClicked({ option, selected }: {
        option: any;
        selected: any;
    }): void;
    optionClicked(option: any): void;
    onSelectCheckBoxItem(option: any): void;
    isSelectedItem(option: any): boolean;
    changeAllEmit(event: KeyboardEvent): void;
    onSelectTabs(tab: any): void;
    onActivatedTabs(tab: any): void;
    callChangeSearch(event: any): void;
    showMoreInfiniteScroll({ target }: {
        target: any;
    }): void;
    scrollListener(componentListner: HTMLElement): Observable<any>;
    setFocus(): void;
    private getSelectedItem;
    scrollToAndSelectCurrentItem(): void;
    protected onListboxFocusIn(event: FocusEvent): void;
    protected checkInfiniteScroll(): void;
    protected getSizeLoading(): "xs" | "sm" | "md";
    protected getTextLoading(): "" | " ";
    private hasInfiniteScroll;
    checkTemplate(): number | true;
    private includeInfiniteScroll;
    protected returnBooleanValue(itemListAction: any, property: string): any;
    private setListBoxMaxHeight;
    private setListBoxWidth;
    private openUrl;
    onClickTabs(tab: any): void;
    formatItemList(item: any): string;
    handleFooterActionListbox(): void;
}