import { ISurfaceContext } from '@devexpress/analytics-core/analytics-elements';
import * as ko from 'knockout';
import { XRControlSurface } from '../designer/controls/xrControl';
import { XRRichViewModel } from '../designer/controls/xrRichText';
import { XRRichController } from './utils/_controller';
import { XRRichEditControlModel } from './utils/_model';
export declare class XRRichModernSurface extends XRControlSurface {
    private _convertReady;
    constructor(control: XRRichViewModel, context: ISurfaceContext);
    createController(richEdit: XRRichEditControlModel): void;
    hasContentBinding: ko.PureComputed<boolean>;
    private _richEditVisible;
    showRichEditWidget: ko.PureComputed<boolean>;
    isValid: ko.Observable<boolean>;
    defaultStyleunit: ko.Computed;
    controller: XRRichController;
    serializedRtf: ko.Observable<string>;
    dragDropFileEnabled: ko.Observable<boolean>;
}