import { Instance, VirtualElement } from "@popperjs/core";
import { ComponentOptions } from "../../type";
export declare type LineHeightMenuItemCallback = (item: ComponentOptions) => void;
export interface LineHeightMenuConstructorOptions {
    reference: HTMLElement | VirtualElement;
    boundary: HTMLElement;
    options: ComponentOptions[];
    itemCallback?: LineHeightMenuItemCallback;
    onlyText?: boolean;
    defaultItem?: boolean;
}
export declare class LineHeightMenu {
    instance?: Instance;
    popper?: HTMLElement;
    constructorOptions: LineHeightMenuConstructorOptions;
    constructor(options: LineHeightMenuConstructorOptions);
    private create;
    protected addItem(panel: HTMLElement, option: ComponentOptions): HTMLDivElement;
    show(selectVal?: string): void;
    hide(): void;
}