import { VirtualKey } from './VirtualKey.js';
import type { WidgetProperties } from '../Widget.js';
import type { KeyContext } from '../../core/KeyContext.js';
import type { WidgetAutoXML } from '../../xml/WidgetAutoXML.js';
/**
 * A {@link VirtualKey} which acts as a control key; toggles
 * {@link KeyContext#ctrl} on click.
 *
 * @category Widget
 */
export declare class ControlKey extends VirtualKey {
    static autoXML: WidgetAutoXML;
    constructor(keyContext: KeyContext, properties?: Readonly<WidgetProperties>);
}