import { ChangeDetectorRef, NgZone, OnInit, TrackByFunction } from '@angular/core';
import { QueuedToast, ToastQueue } from './ToastQueue';
import { ToastContent } from './toast.component';
import * as i0 from "@angular/core";
type VerticalPlacement = 'top' | 'bottom';
type HorizontalPlacement = 'left' | 'right';
export declare class ToastRegionComponent implements OnInit {
    _toastQueue: ToastQueue<ToastContent>;
    private document;
    private changeDetectorRef;
    private ngZone;
    _trackBy: TrackByFunction<QueuedToast<unknown>>;
    placement: VerticalPlacement | `${VerticalPlacement}-${HorizontalPlacement}`;
    visibleToasts: QueuedToast<ToastContent>[];
    private _expanded;
    get expanded(): boolean;
    set expanded(expanded: boolean);
    get toastPlacement(): 'top' | 'bottom';
    constructor(_toastQueue: ToastQueue<ToastContent>, document: Document, changeDetectorRef: ChangeDetectorRef, ngZone: NgZone);
    onDocumentKeyDown(event: KeyboardEvent): void;
    onDocumentClick(event: MouseEvent): void;
    ngOnInit(): void;
    private updateVisibleToasts;
    withTransition(fn: () => void): void;
    protected toggleExpanded(): void;
    protected close(key: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<ToastRegionComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<ToastRegionComponent, "sp-toast-region", never, { "placement": "placement"; }, {}, never, never, true, never>;
}
export {};