/**
 * Central registry for all drag and drop operations.
 * Singleton that coordinates between active drag instances.
 *
 * @public
 */
export declare class DragDropRegistry {
    private static _instance;
    private readonly _dragItems;
    private readonly _dropContainers;
    private _activeDragItem;
    private readonly _globalListeners;
    private _pointerMoveThrottleId;
    /**
     * @private
     */
    private constructor();
    /**
     * Get singleton instance.
     *
     * @public
     */
    static get instance(): DragDropRegistry;
    /**
     * Whether any drag operation is currently active.
     *
     * @public
     */
    get isDragging(): boolean;
    /**
     * Active drag item (if any).
     *
     * @public
     */
    get activeDragItem(): any | null;
    /**
     * Register a drag item.
     *
     * @param item - Drag item to register.
     *
     * @public
     */
    registerDragItem(item: unknown): void;
    /**
     * Unregister a drag item.
     *
     * @param item - Drag item to unregister.
     *
     * @public
     */
    removeDragItem(item: unknown): void;
    /**
     * Register a drop container.
     *
     * @param container - Drop container to register.
     *
     * @public
     */
    registerDropContainer(container: unknown): void;
    /**
     * Unregister a drop container.
     *
     * @param container - Drop container to unregister.
     *
     * @public
     */
    removeDropContainer(container: unknown): void;
    /**
     * Start a drag operation.
     *
     * @param item - Drag item that is starting.
     *
     * @public
     */
    startDragging(item: unknown): void;
    /**
     * Stop a drag operation.
     *
     * @param item - Drag item that is stopping.
     *
     * @public
     */
    stopDragging(item: unknown): void;
    /**
     * Get all registered drag items.
     *
     * @returns Array of drag items.
     *
     * @public
     */
    getDragItems(): Array<any>;
    /**
     * Get all registered drop containers.
     *
     * @returns Array of drop containers.
     *
     * @public
     */
    getDropContainers(): Array<any>;
    /**
     * Find drop container at a specific point.
     *
     * @param x - X coordinate.
     * @param y - Y coordinate.
     * @returns Drop container or null.
     *
     * @public
     */
    getDropContainerAtPoint(x: number, y: number): any | null;
    /**
     * Setup global listeners for active drag.
     *
     * @private
     */
    private _setupGlobalListeners;
    /**
     * Remove global listeners.
     *
     * @private
     */
    private _removeGlobalListeners;
}
/**
 * Get the singleton registry instance.
 *
 * @returns Registry instance.
 *
 * @public
 */
export declare function getDragDropRegistry(): DragDropRegistry;
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