import { ComputedRef, Ref } from 'vue';
/**
 * Create the standard onDragAdd handler used by all container components.
 * Selects the dragged item in the design form store.
 */
export declare function useDragAdd(designForm?: any): {
    onDragAdd: (evt: Event | any, dataList: any) => void;
};
export declare function useDropGuard(parentItemType: string | (() => string)): {
    moveHandler: (evt: any) => boolean;
    guardAdd: (dataList: any[], newIndex: number) => boolean;
};
/**
 * Ensure a data object has an array at the given key (default "items").
 * Used by checkItem in container components.
 */
export declare function ensureItems(adata: any, key?: string): void;
/**
 * Create a checkItem function that ensures the given key exists.
 * Supports card-container's dual-key (header/body) pattern.
 */
export declare function createCheckItem(defaultKey?: string): (adata: any, type?: string) => void;
/**
 * Computed row height based on compSize.
 * Shared by box-col, box-container, dytable-col, table-container.
 */
export declare function useRowHeight(compSize: Ref<string> | ComputedRef<string> | (() => string)): ComputedRef<"45px" | "35px" | "40px">;
/**
 * Dialog/Drawer panel state management.
 * Shared by dialog-container and drawer-container.
 */
export declare function usePanelState(formData: Ref<any>, field: Ref<any> | (() => any)): {
    visible: Ref<boolean, boolean>;
    tempFormData: Ref<any, any>;
    handleOpen: () => void;
    handleClose: () => void;
};
/**
 * Create a child node for condition-container / condition-node.
 * @param index - insertion index
 * @param withItems - whether to include an items array
 */
export declare function createChildNode(index: number, withItems?: boolean): any;
/**
 * Remove a leaf node from a condition tree.
 */
export declare function removeLeaf(items: any[], index: number): void;
/**
 * Compute CSS class for condition node depth.
 */
export declare function levelClass(data: any, depth: number): string;