import { OnDestroy } from '@angular/core';
import { Point } from '../../bd2-heatmap.dom';
import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class TooltipService implements OnDestroy {
    request$: Subject<[boolean, string, Point, Point]>;
    constructor();
    showTooltip(label: string, point: Point, location: Point): void;
    hideTooltip(point: Point, location: Point): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<TooltipService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TooltipService>;
}