import { ElementRef, EventEmitter, TemplateRef } from "@angular/core";
import { DropdownGroupOptions } from './model/dropdown_group_options';
import { DropdownGroupOption } from './model/dropdown_group_option';
export declare class DropdownGroupComponent {
    private elementRef;
    options: DropdownGroupOptions<any>;
    selectEmitter: EventEmitter<any>;
    dropdownMenu: any;
    dropdownTemplate: any;
    searchContainer: any;
    currentTplRef: TemplateRef<any>;
    isOpen: boolean;
    selectedOption: DropdownGroupOption<any>;
    visibleDropdownOptionGroups: {
        groupName: string;
        valueList: DropdownGroupOption<any>[];
    }[];
    arrIndex: number;
    eleIndex: number;
    typedValue: string;
    searchValue: string;
    dropdownPositionStyles: {};
    private dropdownElement;
    private hoveredOption;
    private oldBtnPosition;
    constructor(elementRef: ElementRef);
    ngOnInit(): void;
    ngAfterContentInit(): void;
    isHovered(arrIndex: number, eleIndex: number): boolean;
    onSelect(arrIndex: number, eleIndex: number): void;
    private selectOption;
    private closeDropdown;
    selectNull(): void;
    toggleDropdown(): void;
    private updateSelectedOption;
    refreshOptionGroups(event: KeyboardEvent): void;
    imeEnd(event: Event): void;
    private updateVisibleDropdownOptionGroups;
    private calculateArrAndEleIndex;
    onHover(arrIndex: number, eleIndex: number): void;
    onClickOutside(event: MouseEvent): void;
    private updateTypedValueWhenClickingOutside;
    private updateScrollTop;
    setDropdownPosition(): boolean;
}