import { XYGridConfig } from "../../core/grid/config/xy-grid-config";
import { RenderState } from "../../renderers/types";
import { Chart } from "../chart";
import { IChartAssist, ISpark } from "./types";
import { IAccessors, IChartAssistSeries, IChartMarker, IChartPalette, IChartSeries, IDataPointsPayload, IValueProvider } from "../common/types";
/**
 * Chart assist implementation to be used with spark charts
 */
export declare class SparkChartAssist implements IChartAssist {
    readonly showBottomAxis: boolean;
    readonly showTopBorder: boolean;
    palette: IChartPalette;
    markers: IValueProvider<IChartMarker>;
    /** Collection of ISpark objects */
    sparks: ISpark<IAccessors>[];
    /** Used for keeping tabs on the legend's active state */
    isLegendActive: boolean;
    /** Grid config for all sparks except the last (bottom) one */
    readonly gridConfig: XYGridConfig;
    /** Grid config for the last (bottom) spark */
    readonly lastGridConfig: XYGridConfig;
    highlightedDataPoints: IDataPointsPayload;
    constructor(showBottomAxis?: boolean, showTopBorder?: boolean, palette?: IChartPalette, markers?: IValueProvider<IChartMarker>);
    /**
     * Use this method to update the set of sparks if they all consist of only one series.
     * If one or more sparks has multiple series use the updateSparks method instead.
     *
     * See {@link IChartAssist#update}
     */
    update(inputSeriesSet: IChartAssistSeries<IAccessors>[]): void;
    /**
     * Use this method to update the set of sparks if any of them consist of more than one series.
     *
     * @param {ISpark<IAccessors>[]} sparks The collection of sparks to update
     */
    updateSparks(sparks: ISpark<IAccessors>[]): void;
    /** See {@link IChartAssist#getHighlightedValue} */
    getHighlightedValue(chartSeries: IChartSeries<IAccessors>, scaleKey: string, formatterName?: string): string | number;
    /**
     * To use the for-cycle trackBy, set the id value on each spark
     * and assign this function to the ngFor trackBy property
     */
    trackByFn(_index: number, spark: ISpark<IAccessors>): string | undefined;
    setRenderState(_seriesId: string, _state: RenderState): void;
    getVisibleSeriesWithLegend(): IChartAssistSeries<IAccessors>[];
    protected createChart(lastSpark: boolean): Chart;
    private configureEventSubscriptions;
    private reconfigureChart;
}