import { Base, IHeader, ILoadFromJSONOptions, ISaveToJSONOptions, ISurvey, ITheme, HorizontalAlignment, VerticalAlignment } from "survey-core";
export declare class HeaderModel extends Base implements IHeader {
    static primaryColorStr: string;
    height: number;
    mobileHeight: number;
    inheritWidthFrom: "survey" | "container";
    textAreaWidth: number;
    overlapEnabled: boolean;
    backgroundImage: string;
    backgroundImageOpacity: number;
    backgroundImageFit: "contain" | "cover" | "fill" | "tile";
    logoPositionX: HorizontalAlignment;
    logoPositionY: VerticalAlignment;
    titlePositionX: HorizontalAlignment;
    titlePositionY: VerticalAlignment;
    descriptionPositionX: HorizontalAlignment;
    descriptionPositionY: VerticalAlignment;
    owner: ITheme;
    getSurvey(live?: boolean): ISurvey;
    fromJSON(json: any, options?: ILoadFromJSONOptions): void;
    setCssVariables(cssVariables?: {
        [index: string]: string;
    }): void;
    toJSON(options?: ISaveToJSONOptions): any;
    saveToThemeJSON(json: ITheme, options?: ISaveToJSONOptions): void;
    private setHeaderBackgroundColorCssVariable;
    private getBackgroundColorSwitchByValue;
    getType(): string;
}