import { ElementRef, OnChanges, Renderer2, SimpleChanges } from '@angular/core';
import { TreeNode } from '../models';
import { TreeDraggingTargetService } from '../services/tree-dragging-target.service';
export declare class TreeDragDirective implements OnChanges {
    private el;
    private renderer;
    private treeDraggingTargetService;
    draggingTarget: TreeNode;
    treeDragEnabled: boolean;
    constructor(el: ElementRef, renderer: Renderer2, treeDraggingTargetService: TreeDraggingTargetService);
    onDragStart(ev: DragEvent): void;
    onDragEnd(event: DragEvent): void;
    ngOnChanges(changes: SimpleChanges): void;
}