/** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
 * Software engineering by
 *  Björnsen Beratende Ingenieure GmbH
 *  Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */
package org.dive4elements.river.client.client.ui.chart;

/**
 * Abstraction for stepping through the navi chart.
 *
 * @author Gernot Belger
 */
public interface INaviChartStepper {
    double getCurrentKm();

    double stepForward();

    double stepBackward();

    double setValidCurrentKm(double userInput);
}