import { EventEmitter, OnDestroy, OnInit } from "@angular/core";
import { NgtVector2 } from "@angular-three/core";
import { NgtGroup } from "@angular-three/core/group";
import * as i0 from "@angular/core";
export declare class VerticalLayoutDirective implements OnInit, OnDestroy {
    private ngtgroup;
    private _margin;
    get margin(): NgtVector2;
    set margin(newvalue: NgtVector2);
    heightchange: EventEmitter<number>;
    private panel;
    constructor(ngtgroup: NgtGroup);
    ngOnDestroy(): void;
    private updatetimer;
    private listentimer;
    ngOnInit(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<VerticalLayoutDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<VerticalLayoutDirective, "[vertical-layout]", ["verticalLayout"], { "margin": "margin"; }, { "heightchange": "heightchange"; }, never, never, true, never>;
}