import { Observable } from 'rxjs';
import { DragBackend } from './backends/drag-backend';
import { DragBackendEvent } from './backends/drag-backend-event';
import { DragLayer } from './drag-layer.component';
import { DragSource } from './drag-source/drag-source.directive';
import { DropTarget } from './drop-target/drop-target.directive';
import { DragRegistry } from './drag-registry';
export declare class DragDispatcher2 {
    private readonly registry;
    private readonly backend;
    dragPreviewsEnabled$: Observable<boolean>;
    private idCounter;
    private dragLayer?;
    private readonly unsubscribes;
    private dragPreviewsEnabled;
    constructor(registry: DragRegistry, backend: DragBackend);
    connectDragSource(dragSource: DragSource, node: any): Observable<DragBackendEvent>;
    disconnectDragSource(dragSource: DragSource): void;
    connectDropTarget(dropTarget: DropTarget, node: any): Observable<DragBackendEvent>;
    disconnectDropTarget(dropTarget: DropTarget): void;
    connectDragLayer(dragLayer: DragLayer): void;
    dragging$(itemType: string | string[]): Observable<boolean>;
    private setupDragPreviewForDragSource(eventStream$, dragPreview);
    toggleDragPreviews(value?: boolean): void;
}