import { AnimationEvent } from '@angular/animations';
import { ConnectedOverlayDirective, ConnectedOverlayPositionChange, ConnectionPositionPair, OverlayOrigin } from '@angular/cdk/overlay';
import { ChangeDetectorRef, EventEmitter, TemplateRef } from '@angular/core';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';
import { Observable } from 'rxjs/Observable';
export declare class NzToolTipComponent {
    private _cdr;
    _hasBackdrop: boolean;
    nzTitle: string;
    nzOverlayClassName: string;
    nzOverlayStyle: {};
    nzMouseEnterDelay: number;
    nzMouseLeaveDelay: number;
    nzVisibleChange: EventEmitter<boolean>;
    nzTemplate: TemplateRef<void>;
    overlay: ConnectedOverlayDirective;
    overlayOrigin: OverlayOrigin;
    nzVisible: boolean;
    visibleSource: BehaviorSubject<boolean>;
    visible$: Observable<boolean>;
    nzTrigger: string;
    _prefix: string;
    _positions: ConnectionPositionPair[];
    _classMap: {};
    _placement: string;
    _trigger: string;
    nzPlacement: string;
    updatePosition(): void;
    onPositionChange($event: ConnectedOverlayPositionChange): void;
    show(): void;
    hide(): void;
    _afterVisibilityAnimation(e: AnimationEvent): void;
    setClassMap(): void;
    setOverlayOrigin(origin: OverlayOrigin): void;
    constructor(_cdr: ChangeDetectorRef);
    private isContentEmpty();
}