import { OnDestroy, AfterViewInit, EventEmitter } from '@angular/core';
import { ElementRef } from '@angular/core';
import { Quantity } from './quantity';
import { Unit } from './unit';
import { SystemOfUnits } from './system-of-units.service';
import * as i0 from "@angular/core";
export declare class UnitSelectComponent implements OnDestroy, AfterViewInit {
    private system;
    set quantityAttr(value: string | Quantity);
    changeUnit: EventEmitter<Unit>;
    quantity?: Quantity;
    private currentUnit?;
    private select;
    private subscription?;
    constructor(elementRef: ElementRef, system: SystemOfUnits);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    private initQuantity;
    private selectUnit;
    change(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<UnitSelectComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<UnitSelectComponent, "[ngUnitSelect]", never, { "quantityAttr": { "alias": "ngUnitSelect"; "required": false; }; }, { "changeUnit": "changeUnit"; }, never, never, false, never>;
}