import { NgZone } from '@angular/core';
import { BehaviorSubject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class TerraFileBrowserService {
    private _zone;
    isDragActive: BehaviorSubject<boolean>;
    private _dropzones;
    private _globalListenersDefined;
    private _dragenterTarget;
    constructor(_zone: NgZone);
    addDropzone(dropzone: HTMLElement): void;
    removeDropzone(dropzone: HTMLElement): void;
    private _isDropzone;
    private _setupGlobalListeners;
    static ɵfac: i0.ɵɵFactoryDeclaration<TerraFileBrowserService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TerraFileBrowserService>;
}