/**
 * 拖拽组件类
 * @class Draggable
 * @description 为DOM元素添加拖拽功能的类,支持拖拽开始、拖拽中、拖拽结束的回调函数
 * @example
 * const element = document.getElementById('draggable');
 * const draggable = new Draggable(element, {
 *   onDragStart: (e) => console.log('开始拖拽'),
 *   onDrag: (e) => console.log('拖拽中'),
 *   onDragEnd: (e) => console.log('结束拖拽'),
 *   coordinate: 'tl' // 可选: tl(左上), tr(右上), bl(左下), br(右下)
 * });
 */
interface DraggableOptions {
    onDragStart?: (event: MouseEvent) => void;
    onDrag?: (event: MouseEvent) => void;
    onDragEnd?: (event: MouseEvent) => void;
    position?: "absolute" | "fixed";
    coordinate?: "tl" | "tr" | "bl" | "br";
}
/**
 * 拖拽组件配置选项接口
 * @interface DraggableOptions
 * @property {function} [onDragStart] - 开始拖拽时的回调函数
 * @property {function} [onDrag] - 拖拽过程中的回调函数
 * @property {function} [onDragEnd] - 结束拖拽时的回调函数
 * @property {string} [position] - 定位方式，可选 absolute 或 fixed
 * @property {string} [coordinate] - 坐标原点，可选 tl(左上)、tr(右上)、bl(左下)、br(右下)
 */
export declare class Draggable {
    private element;
    private options;
    private isDragging;
    private startX;
    private startY;
    private initialX;
    private initialY;
    private threshold;
    private onMouseMoveHandler;
    private onMouseUpHandler;
    constructor(element: HTMLElement, options?: DraggableOptions);
    private onMouseDown;
    private getBoundedPosition;
    private onMouseMove;
    private convertCoordinate;
    private onMouseUp;
}
export {};