import { NgZone } from '@angular/core';
import { Draggable } from './classes/draggable';
import { DropZone } from './classes/drop-zone';
interface DropZoneRegisterParams {
    element: HTMLElement;
}
interface DraggableRegisterParams {
    element: HTMLElement;
}
export declare type DragAction = 'move' | 'copy';
export interface DragAndDropEvent {
    action: DragAction;
    data: any;
    event: DragEvent;
}
export declare class DragAndDropService {
    private _ngZone;
    constructor(_ngZone: NgZone);
    active_draggable: Draggable;
    active_drop_zone: DropZone;
    private _draggable_id;
    private _draggables;
    private _draggable_subscriptions;
    private _drop_zone_id;
    private _drop_zones;
    private _drop_zone_subscriptions;
    registerDraggable(params: DraggableRegisterParams): Draggable;
    unregisterDraggable(draggable: Draggable): void;
    registerDropZone(params: DropZoneRegisterParams): DropZone;
    unregisterDropZone(drop_zone: DropZone): void;
    addEventListener(element: HTMLElement | Document, event_name: string, cb: (event: DragEvent) => void, outside_angular?: boolean): void;
    removeEventListener(element: HTMLElement | Document, event_name: string, cb: (event: DragEvent) => void): void;
    isDropZoneRestricted(drop_zone: DropZone): boolean;
    getEvent(event?: DragEvent): DragAndDropEvent;
    private _checkLeave;
}
export {};