import { AfterViewInit, ChangeDetectorRef, QueryList, Renderer2, TemplateRef, Type, ViewContainerRef } from '@angular/core';
import { DropDownItem } from '../../models/drop-down-item.interface';
import { DropDownEventMessagesService } from '../../services/drop-down-event-messages/drop-down-event-messages.service';
import { PaginatorPage } from '../../../../data-table/paginator/models/paginator-page.interface';
import { ServerSideOptions } from '../../models/drop-down-server-options.interface';
import { DropDownOptions } from '../../models/drop-down-options.interface';
import { CdkVirtualScrollViewport } from '@angular/cdk/scrolling';
import { SelectedItemsState } from '../../utils/selected-items-state.utils';
import * as i0 from "@angular/core";
export declare class DefaultDropDownItemsComponent implements AfterViewInit {
    private cdr;
    private dropDownEventMessagesService;
    private viewContainerRef;
    private renderer;
    private _items;
    set items(items: DropDownItem[]);
    get items(): DropDownItem[];
    private _dropDownOptions;
    set dropDownOptions(dropDownOptions: DropDownOptions);
    get dropDownOptions(): DropDownOptions;
    private _serverSideOptions;
    set serverSideOptions(serverSideOptions: ServerSideOptions);
    get serverSideOptions(): ServerSideOptions;
    private _isServerSide;
    set isServerSide(isServerSide: boolean);
    get isServerSide(): boolean;
    private _isNestedServerSideMenu;
    set isNestedServerSideMenu(isNestedServerSideMenu: boolean);
    get isNestedServerSideMenu(): boolean;
    private _searchValue;
    set searchValue(searchValue: string);
    get searchValue(): string;
    private _selectedItemsState;
    set selectedItemsState(selectedItemsState: SelectedItemsState);
    get selectedItemsState(): SelectedItemsState;
    nextCursor: string;
    private _childrenItems;
    set childrenItems(childrenItems: QueryList<any>);
    get childrenItems(): QueryList<any>;
    menuIndexNumber: number;
    itemTemplateRef: TemplateRef<any>;
    itemComponent: Type<any>;
    isGivenItemsNil: boolean;
    showLoader: boolean;
    selectedPage: number;
    virtualScrollViewportHeight: number;
    private keyManager;
    private hasNestedItems;
    private lookGetMoreItems;
    readonly itemHeight = 40;
    get viewContainerNativeElement(): any;
    viewport: CdkVirtualScrollViewport;
    constructor(cdr: ChangeDetectorRef, dropDownEventMessagesService: DropDownEventMessagesService, viewContainerRef: ViewContainerRef, renderer: Renderer2);
    ngAfterViewInit(): void;
    /**
     * track by value
     * @param index
     * @param item
     */
    trackById(index: any, item: any): string;
    crateKeyManager(): void;
    /**
     * Handle key events (listen to keydown from all elements)
     * We support Enter, Arrow Down, Arrow Up
     * - ArrowDown, ArrowUp will move selection to show the active item
     * - Enter to select item
     */
    onKeydownHandler(event: any): void;
    /**
     * when user clicked on a page
     * @param page
     */
    pageChanged(page: PaginatorPage): void;
    /**
     * calc the virtual scroll viewport height
     */
    calcVirtualScrollViewportHeight(): void;
    /**
     * scroll to top.
     */
    scrollToTop(): void;
    /**
     * get more items from server
     */
    getMoreItems(): void;
    /**
     * prevent key manager in case
     * dropdown has nested items or uses infinite scroll
     */
    preventKeyManager(): boolean;
    /**
     * init the view container min-height style for infinite scroll.
     * we do this in order to prevent UI height jump when the user is searching.
     * once viewContainerNativeElement exists, we get its height and use it for min-height
     */
    initViewContainerMinHeight(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DefaultDropDownItemsComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<DefaultDropDownItemsComponent, "sing-default-drop-down-items", never, { "items": "items"; "dropDownOptions": "dropDownOptions"; "serverSideOptions": "serverSideOptions"; "isServerSide": "isServerSide"; "isNestedServerSideMenu": "isNestedServerSideMenu"; "searchValue": "searchValue"; "selectedItemsState": "selectedItemsState"; "nextCursor": "nextCursor"; "menuIndexNumber": "menuIndexNumber"; "itemTemplateRef": "itemTemplateRef"; "itemComponent": "itemComponent"; "isGivenItemsNil": "isGivenItemsNil"; }, {}, never, never, false, never>;
}
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