import { ElementRef, EventEmitter, OnInit, AfterViewInit, OnDestroy } from '@angular/core';
import { DragAndDropService, DragAndDropEvent } from './drag-and-drop.service';
import { DropZone } from './classes/drop-zone';
export declare class DropZoneDirective implements OnInit, AfterViewInit, OnDestroy {
    private _service;
    elementRef: ElementRef;
    private _draggable_children;
    private _setEnabled;
    private _setDropZoneRestriction;
    drop_zone_drag_over_class: string;
    onDragEnter: EventEmitter<DragEvent>;
    onDragLeave: EventEmitter<DragEvent>;
    onDrop: EventEmitter<DragAndDropEvent>;
    onRemove: EventEmitter<DragAndDropEvent>;
    constructor(_service: DragAndDropService, elementRef: ElementRef);
    enabled: boolean;
    dragging_over: boolean;
    drop_zone_restriction: string | string[];
    drop_zone: DropZone;
    private _drag_enter_subscription;
    private _drag_leave_subscription;
    private _drop_subscription;
    private _remove_subscription;
    ngOnInit(): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    private readonly _element;
}