import { ReactiveController, ReactiveControllerHost } from 'lit';
import { Ref } from 'lit/directives/ref.js';
export interface DragControllerOptions {
    /** The element to make draggable */
    targetElementRef: Ref<HTMLElement>;
    /** The drag handle element reference */
    dragHandleRef: Ref<HTMLElement>;
    /** Whether to snap back to viewport bounds on release (default: true) */
    snapToViewport?: boolean;
    /** Whether keyboard navigation should be constrained to viewport (default: true) */
    constrainKeyboardNavigation?: boolean;
    /** Step size for keyboard navigation in pixels (default: 10) */
    keyboardStep?: number;
    /** Animation duration for snap-back in milliseconds (default: 200) */
    snapAnimationDuration?: number;
    /** Whether the element can be dragged outside viewport boundaries during drag (default: true) */
    allowOutOfBounds?: boolean;
}
export declare class DragController implements ReactiveController {
    private _host;
    private _options;
    private _isDragging;
    private _currentTransformX;
    private _currentTransformY;
    private _dragOffsetX;
    private _dragOffsetY;
    private _dragAbortController?;
    constructor(host: ReactiveControllerHost, options: DragControllerOptions);
    hostConnected(): void;
    hostDisconnected(): void;
    /**
     * Gets whether the element is currently being dragged
     */
    get isDragging(): boolean;
    /**
     * Gets the current transform values
     */
    get currentTransform(): {
        x: number;
        y: number;
    };
    /**
     * Resets the drag position to original location
     */
    resetPosition(): void;
    /**
     * Cleanup method for removing event listeners and resetting state
     */
    cleanup(): void;
    /**
     * Handle pointer down event to start dragging
     */
    handlePointerDown: (event: PointerEvent) => void;
    /**
     * Handle keyboard navigation for drag handle
     */
    handleKeyDown: (event: KeyboardEvent) => void;
    private _handlePointerMove;
    private _handlePointerUp;
    private _snapToViewport;
    private _constrainToViewport;
    private _getOriginalPosition;
    private _getCurrentTransform;
    private _addDragListeners;
    private _removeDragListeners;
}