import { ElementRef, TemplateRef, OnDestroy } from "@angular/core";
import { Overlay } from "@angular/cdk/overlay";
import { TooltipTrigger, TooltipTheme } from "./tooltip-content/tooltip-content.component";
import { Subject } from "rxjs";
import { TooltipPosition } from "./tooltip.positions";
/**
 * A text label that acts as a helper to a specific item
 */
export declare class TooltipDirective implements OnDestroy {
    private overlay;
    private elementRef;
    /** content of tooltip */
    content: string | TemplateRef<any>;
    /** tooltip trigger method */
    trigger: TooltipTrigger;
    /** tooltip position */
    position: TooltipPosition;
    /** tooltip theme */
    theme: TooltipTheme;
    /** CSS class */
    className?: string;
    /** reposition tooltip with more placement choices */
    cascade?: boolean;
    /** Close the tooltip once the user scrolls */
    closeOnScroll: boolean;
    /** Delay before closing on scroll */
    closeOnScrollDelay: number;
    /** <!-- skip --> */
    private overlayRef;
    /** <!-- skip --> */
    private tooltipRef;
    /** <!-- skip --> */
    destroy$: Subject<boolean>;
    constructor(overlay: Overlay, elementRef: ElementRef);
    /**
     * configure the overlay with position and scroll strategies
     * @param origin element ref to where the overlay will be connected to
     */
    private getOverlayConfig;
    /**
     * Configure the overlay position in a flexible way
     * listen for position changes and update the arrow of the tooltip accordingly
     * @param origin element ref to where the overlay will be connected to
     */
    private getOverlayPosition;
    /**
     * get possible overlay placements the first placement is the position Input
     * Default Tooltip position will display the tooltip in the following order depending on how available space [top, right, bottom, left]
     * Cascade Tooltip position have twelve different possible position like [top, top-right, top-bottom, right, right-top....]
     */
    private getPositions;
    showHover(): void;
    hideHover(event: MouseEvent): void;
    /**
     * This Listener triggers both on focus and on click
     */
    /** <!-- skip --> */
    showFocusWithin(event: FocusEvent): void;
    hideClick(): void;
    /**
     * <!-- skip -->
     * Show tooltip
     */
    showTooltip(): void;
    /**
     * <!-- skip -->
     * Hide tooltip by destroying the tooltip ref and overlay ref
     */
    hideTooltip(): void;
    ngOnDestroy(): void;
}