import { AfterViewInit, ElementRef, EventEmitter, Renderer2 } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * this directive helps us with the up/down key presses
 * in order to set host element in focus
 */
export declare class SingArrowKeyNavigationDirective implements AfterViewInit {
    private elementRef;
    renderer: Renderer2;
    /**
     * let the host element to know when the element is focused
     */
    focusSet: EventEmitter<void>;
    constructor(elementRef: ElementRef, renderer: Renderer2);
    ngAfterViewInit(): void;
    /**
     * listen to keydown events on the host element
     * for key down: we find the next element sibling and set it in focus
     * for key up: we find the previous element sibling and set it in focus
     * if the key code is not one of the above - do nothing
     * @param event
     */
    onKeydownHandler(event: KeyboardEvent): void;
    /**
     * set element in focus and emit an event to the host element
     * that it is now in focus
     * @param elementToFocus
     */
    setElementFocus(elementToFocus: any): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SingArrowKeyNavigationDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<SingArrowKeyNavigationDirective, "[singArrowKeyNavigation]", never, {}, { "focusSet": "focusSet"; }, never, never, false, never>;
}
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