import { OnInit, ElementRef, OnDestroy, EventEmitter, NgZone, Renderer2 } from '@angular/core';
import { Subscription } from 'rxjs';
import { DraggableHelper } from './draggable-helper.provider';
import { DraggableScrollContainerDirective } from './draggable-scroll-container.directive';
import * as i0 from "@angular/core";
export interface DropEvent<T = any> {
    dropData: T;
    /**
     * ClientX value of the mouse location where the drop occurred
     */
    clientX: number;
    /**
     * ClientY value of the mouse location where the drop occurred
     */
    clientY: number;
    /**
     * The target of the event where the drop occurred
     */
    target: EventTarget;
}
export interface DragEvent<T = any> extends DropEvent<T> {
}
export interface ValidateDropParams extends DropEvent {
}
export declare type ValidateDrop = (params: ValidateDropParams) => boolean;
export declare class DroppableDirective implements OnInit, OnDestroy {
    private element;
    private draggableHelper;
    private zone;
    private renderer;
    private scrollContainer;
    /**
     * Added to the element when an element is dragged over it
     */
    dragOverClass: string;
    /**
     * Added to the element any time a draggable element is being dragged
     */
    dragActiveClass: string;
    /**
     * Allow custom behaviour to control when the element is dropped
     */
    validateDrop: ValidateDrop;
    /**
     * Called when a draggable element starts overlapping the element
     */
    dragEnter: EventEmitter<DropEvent<any>>;
    /**
     * Called when a draggable element stops overlapping the element
     */
    dragLeave: EventEmitter<DropEvent<any>>;
    /**
     * Called when a draggable element is moved over the element
     */
    dragOver: EventEmitter<DropEvent<any>>;
    /**
     * Called when a draggable element is dropped on this element
     */
    drop: EventEmitter<DropEvent<any>>;
    currentDragSubscription: Subscription;
    constructor(element: ElementRef<HTMLElement>, draggableHelper: DraggableHelper, zone: NgZone, renderer: Renderer2, scrollContainer: DraggableScrollContainerDirective);
    ngOnInit(): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DroppableDirective, [null, null, null, null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<DroppableDirective, "[mwlDroppable]", never, { "dragOverClass": "dragOverClass"; "dragActiveClass": "dragActiveClass"; "validateDrop": "validateDrop"; }, { "dragEnter": "dragEnter"; "dragLeave": "dragLeave"; "dragOver": "dragOver"; "drop": "drop"; }, never, never, false, never>;
}