import * as React from 'react';
import { FormItem, IFormItemStates, IFormItemProps } from './common/FomItem';
export interface ICheckboxProps extends Omit<IFormItemProps, 'placeholder' | 'autoFocus'> {
    selectOptions: {
        label: React.ReactNode;
        value: string | number;
        disabled?: boolean;
    }[];
    delimiter: string;
    newLineForOption: boolean;
    checkboxAlwaysStayTop: boolean;
}
export declare class Checkbox extends FormItem<ICheckboxProps, IFormItemStates> {
    static defaultProps: {
        delimiter: string;
        newLineForOption: boolean;
        checkboxAlwaysStayTop: boolean;
        name: undefined;
        value: undefined;
        error: undefined;
        oldValue: undefined;
        comparing: boolean;
        required: boolean;
        disabled: boolean;
        onValueChanged: () => undefined;
        customValidate: () => undefined;
        innerClass: undefined;
    };
    render(): React.JSX.Element;
    validate(option?: {
        silentValidation?: boolean | undefined;
    }): string | undefined;
    protected valueToDisplayValue(value: string | null | undefined): string;
    private onCheckChanged;
    private convertToLabels;
    private normalizeSelectOptions;
}