import { PathOption } from '@syncfusion/ej2-svg-base';
import { Series } from './chart-series';
import { LineBase } from './line-base';
import { Axis } from '../../chart/axis/axis';
/**
 * The `StackingStepAreaSeries` module is used to render the stacking step area series.
 */
export declare class StackingStepAreaSeries extends LineBase {
    private prevStep;
    /**
     * Render the Stacking Step Area series.
     *
     * @param {Series} stackSeries - The series to be rendered.
     * @param {Axis} xAxis - The x-axis of the chart.
     * @param {Axis} yAxis - The y-axis of the chart.
     * @param {boolean} isInverted - Specifies whether the chart is inverted.
     * @param {boolean} pointAnimate - Specifies whether the point has to be animated or not.
     * @param {boolean} pointUpdate - Specifies whether the point has to be updated or not.
     * @returns {void}
     * @private
     */
    render(stackSeries: Series, xAxis: Axis, yAxis: Axis, isInverted: boolean, pointAnimate: boolean, pointUpdate?: boolean): void;
    /**
     * To animate point for stacking step area series.
     *
     * @param {Series} series - Specifies the series.
     * @param {number} point - Specifies the point.
     * @returns {void}
     * @private
     */
    updateDirection(series: Series, point: number[]): void;
    /**
     * Adds a area path to equate the start and end paths.
     *
     * @param {PathOption} options - The options for the path.
     * @param {Series} series - The series to which the path belongs.
     * @param {string} clipRect - The clip rectangle for the path.
     * @returns {void}
     * @private
     */
    addPath(options: PathOption, series: Series, clipRect: string): void;
    /**
     * Animates the series.
     *
     * @param  {Series} series - Defines the series to animate.
     * @returns {void}
     * @private
     */
    doAnimation(series: Series): void;
    /**
     * To destroy the stacking step area.
     *
     * @returns {void}
     * @private
     */
    destroy(): void;
    /**
     * Get module name.
     *
     * @returns {string} - Returns the module name.
     */
    protected getModuleName(): string;
    /**
     * To get the nearest visible point.
     *
     * @param {Points[]} points points
     * @param {number} j index
     * @returns {number} - Returns the nearest visible point.
     */
    private getNextVisiblePointIndex;
}