import type { Ctrl, CtrlChangeHandler, CtrlConfig, CtrlItemType } from "./types";
export declare class FileCtrl implements Ctrl<File | null> {
    id: string;
    type: CtrlItemType;
    name: string;
    label: string;
    group: string;
    value: File | null;
    isRandomizationDisabled: boolean;
    onChange: CtrlChangeHandler;
    onInput: CtrlChangeHandler;
    element: HTMLElement;
    input: HTMLInputElement;
    preview: HTMLDivElement;
    accept: string;
    constructor(config: CtrlConfig<File | null>, onChange: CtrlChangeHandler, onInput: CtrlChangeHandler);
    buildUI: () => {
        element: HTMLDivElement;
        input: HTMLInputElement;
        preview: HTMLDivElement;
    };
    update: (file: File | null) => void;
    parse: () => null;
    getRandomValue: () => null;
    getDefaultValue: () => null;
    valueToString: () => string;
}