import { DownloadItem } from '../actions/download';
import { BarWidgetData } from './types';
export interface BarDownloadConfigArgs {
    filename: string;
    getData: () => BarWidgetData;
    /**
     * Optional getter for the widget's capture element (registered by
     * `Widget.State` on its success path). When provided, a PNG item is
     * prepended to the returned list. Wire it to
     * `() => getCaptureEl(id)`.
     */
    getCaptureEl?: () => HTMLElement | null;
    /** PNG `pixelRatio` (default 2). */
    pngPixelRatio?: number;
    /** PNG `backgroundColor` (default transparent). */
    pngBackgroundColor?: string | null;
}
/**
 * Builds download items for the Bar widget. Always includes a CSV item
 * with one `name,value` block per series, separated by an empty row when
 * there are multiple. When `getCaptureEl` is supplied, also prepends a PNG
 * item that rasterises the captured element via `html2canvas`.
 */
export declare function createBarDownloadConfig(args: BarDownloadConfigArgs): DownloadItem[];