import { ChangeDetectorRef, ElementRef, EventEmitter, OnDestroy, OnInit } from '@angular/core';
import Popper from 'popper.js/dist/esm/popper.js';
import { TsPopoverOptions } from './popover-options';
/**
 * A popover component that supports rich HTML
 *
 * @example
 * <ts-popover
 *              #myPopper
 *              (onHidden)="myFunction($event)"
 *              (onUpdate)="myFunction($event)"
 *              (popoverHidden)="myFunction($event)"
 *              (popoverShown)="myFunction($event)"
 * >
 *              My popover content
 * </ts-popover>
 *
 * <example-url>https://getterminus.github.io/ui-demos-release/components/popover</example-url>
 */
export declare class TsPopoverComponent implements OnDestroy, OnInit {
    private CDR;
    /**
     * The element that passed to popper.js
     */
    referenceObject: HTMLElement;
    /**
     * An instance of popper
     */
    popoverInstance: Popper;
    /**
     * The display type of the popover element
     */
    displayType: string;
    /**
     * The opacity of popover element
     */
    opacity: number;
    /**
     * aria hidden attribute - it requires a string value.
     */
    ariaHidden: string;
    /**
     * Whether the element is visible
     */
    visibility: boolean;
    /**
     * ID set by trigger and pass to popover element
     */
    id: string;
    /**
     * Options needed for popper.js
     */
    popoverOptions: TsPopoverOptions;
    /**
     * A reference to the popover view
     */
    popoverViewRef: ElementRef;
    /**
     * Event emitted when the popover is hidden
     */
    readonly onHidden: EventEmitter<any>;
    /**
     * Event emitted when the popover is updated
     */
    readonly onUpdate: EventEmitter<any>;
    /**
     * Event emitted when the popover is hidden
     */
    readonly popoverHidden: EventEmitter<any>;
    /**
     * Event emitted when the popover is shown
     */
    readonly popoverShown: EventEmitter<any>;
    constructor(CDR: ChangeDetectorRef);
    /**
     * Check whether popper.js has been properly imported.
     */
    ngOnInit(): void;
    /**
     * Destroy the instance when component is destroyed.
     */
    ngOnDestroy(): void;
    /**
     * When popover is hidden, destroy the instance, toggle visibility to false and emit onHidden event.
     */
    hide(): void;
    /**
     * When popover is shown, instantiate popper instance, does update and toggle visibility.
     *
     * @param options - PopoverOptions
     */
    show(options: TsPopoverOptions): void;
    /**
     * When popover is scheduled to be updated, call popper.js scheduleUpdate
     */
    scheduleUpdate(): void;
    /**
     * Based on visibility, adjust visual settings
     *
     * @param visibility - boolean
     */
    toggleVisibility(visibility: boolean): void;
}