export declare const FLOW_EVENTS: {
    NODE_SELECTED: string;
    EDGE_SELECTED: string;
    CANVAS_CLICKED: string;
    FLOW_DATA_UPDATED: string;
    LAYOUT_CHANGED: string;
    ZOOM_CHANGED: string;
};
export declare const flowEventBus: {
    /**
     * 发送事件
     * @param eventName 事件名称
     * @param detail 事件详情
     */
    emit: (eventName: string, detail?: any) => void;
    /**
     * 监听事件
     * @param eventName 事件名称
     * @param handler 事件处理函数
     * @returns 清理函数
     */
    on: (eventName: string, handler: (event: CustomEvent) => void) => () => void;
    /**
     * 移除事件监听
     * @param eventName 事件名称
     * @param handler 事件处理函数
     */
    off: (eventName: string, handler: (event: CustomEvent) => void) => void;
};