import { AfterViewInit, ElementRef, OnDestroy, Renderer2 } from '@angular/core';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
/**
 * This is a manager for our resize events. You can add disable
 * the resize handlers, and (re-)enable handlers after they have been disabled.
 *
 * OptimizedResize uses the ResizeObserver object with a fallback to the
 * window.resize event.
 * The events emitted by the 'elementResized' property run out of
 * Angular ngZone.
 */
export declare class MigResizableDirective implements AfterViewInit, OnDestroy {
    private renderer;
    private window;
    private migContainerNative;
    private resizeUnloadHandler;
    private containerResizeObserver;
    private lastContainerHeight;
    private lastContainerWidth;
    private resizeObserverEnabled;
    private readonly unsubscribe$;
    private resizingSubject;
    /**
     * Observable that emits, when element resized.
     * Collects multiple events into one until the next animation frame.
     */
    elementResized: Observable<void>;
    /**
     *Creates an instance of OptimizedResize.
     * @param documentRef - Reference to the angular DOCUMENT element.
     * @param renderer - Angular class to modify DOM (here: add / remove event handlers).
     * @param containerElement - elementRef of the container element
     */
    constructor(documentRef: Document, renderer: Renderer2, containerElement: ElementRef<HTMLDivElement>);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    /**
     * Enables all resize handlers, if they do not exist or were disabled.
     */
    enable(): void;
    /**
     * Disables (but do not remove) all resize handlers.
     */
    disable(): void;
    /**
     * Create observer for resize events of the container element to update the
     * image grid. When the height or width of the container changes, all resize
     * callbacks get called.
     */
    private createContainerWidthResizeObserver;
    /**
     * Handle the resize event.
     */
    private resize;
    static ɵfac: i0.ɵɵFactoryDeclaration<MigResizableDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MigResizableDirective, "[migResizable]", never, {}, {}, never, never, true, never>;
}