import { AfterContentInit, Renderer2, ElementRef, OnDestroy } from '@angular/core';
import { DragSource } from './drag-source.directive';
export declare class DragSourceDragging implements AfterContentInit, OnDestroy {
    private elementRef;
    private renderer;
    isActive: boolean;
    source: DragSource;
    ccDragSourceDragging: string[] | string;
    private classList;
    private subscription;
    constructor(elementRef: ElementRef, renderer: Renderer2);
    ngAfterContentInit(): void;
    ngOnDestroy(): void;
    private update(isDragging);
}