import { IQuestion, QuestionFileModel } from 'survey-core';
import { SurveyPDF } from '../survey';
import { IPoint, DocController } from '../doc_controller';
import { FlatQuestion } from './flat_question';
import { IPdfBrick } from '../pdf_render/pdf_brick';
export declare class FlatFile extends FlatQuestion {
    protected survey: SurveyPDF;
    static readonly IMAGE_GAP_SCALE: number;
    static readonly TEXT_MIN_SCALE: number;
    static DEFAULT_IMAGE_FIT: string;
    protected question: QuestionFileModel;
    constructor(survey: SurveyPDF, question: IQuestion, controller: DocController);
    private generateFlatItem;
    private addLine;
    private getImagePreviewContentWidth;
    generateFlatsContent(point: IPoint): Promise<IPdfBrick[]>;
}