import { ViewContainerRef, OnDestroy, ElementRef, OnInit } from '@angular/core';
import { Overlay } from '@angular/cdk/overlay';
import { PopoverContent, PopoverPlacement, PopoverTrigger } from './types';
import * as i0 from "@angular/core";
export declare class PopoverDirective implements OnInit, OnDestroy {
    private _overlayService;
    private _elementRef;
    private _viewRef;
    header: import("@angular/core").InputSignal<string>;
    content: import("@angular/core").InputSignal<PopoverContent>;
    placement: import("@angular/core").InputSignal<PopoverPlacement>;
    triggerBy: import("@angular/core").InputSignal<PopoverTrigger>;
    private _portal;
    private _overlayRef?;
    constructor(_overlayService: Overlay, _elementRef: ElementRef, _viewRef: ViewContainerRef);
    ngOnInit(): void;
    private _createOverlay;
    private _disposeOverlay;
    private _toggleOverlay;
    private _getPositions;
    private _onClick;
    private _onDblclick;
    private _onMouseEnter;
    private _onMouseLeave;
    private _onFocus;
    private _onFocusout;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<PopoverDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<PopoverDirective, "[bkPopover]", ["bkPopover"], { "header": { "alias": "header"; "required": false; "isSignal": true; }; "content": { "alias": "bkPopover"; "required": false; "isSignal": true; }; "placement": { "alias": "placement"; "required": false; "isSignal": true; }; "triggerBy": { "alias": "triggerBy"; "required": false; "isSignal": true; }; }, {}, never, never, true, never>;
}