import * as i0 from "@angular/core";
/**
 * Dropdown event service shared between Button and DropdownMenu components.
 *
 * Dropdown menu element's width calculation must be triggered from host Button click, and it should
 * ensure that the dropdown is always fully visible.
 */
export declare class DropdownEventService {
    private _triggerCalculationSubject;
    triggerCalculation: import("rxjs").Observable<void>;
    triggerWidthCalculation(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropdownEventService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DropdownEventService>;
}