import { OnInit, OnChanges, EventEmitter, ViewContainerRef, TemplateRef, EmbeddedViewRef, ElementRef } from '@angular/core';
declare type OptionInterface = {
    label: string;
    value: string;
};
declare type SelectInterface = OptionInterface[];
export declare class VirtualScrollComponent implements OnInit, OnChanges {
    private vcr;
    topLevel: ElementRef;
    currentOption: any;
    isDisabled: boolean;
    options: SelectInterface;
    model: string;
    formName: string;
    formLabel: string;
    formValue: string;
    isRequired: boolean;
    modelChange: EventEmitter<any>;
    view: EmbeddedViewRef<any>;
    optionsCopy: SelectInterface;
    isOpen: boolean;
    button: {
        classes: string;
        style: string;
    };
    constructor(vcr: ViewContainerRef);
    ngOnInit(): void;
    ngOnChanges(): void;
    search(event: any): void;
    navigate(event: any): void;
    select(option: OptionInterface): void;
    isActive(value: string): boolean;
    open(dropdownTpl: TemplateRef<any>): void;
    closeDropdown(event?: any): void;
}
export {};