--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/ChartExtender.java	Thu Feb 15 13:46:35 2018 +0100
@@ -0,0 +1,34 @@
+/** 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.exports;
+
+import org.jfree.chart.plot.XYPlot;
+
+/**
+ * Implementors of this class can be used to tweak some very application specific behaviour within the charts.<br/>
+ * Implementations should not have a state, because they are instantiated only once.
+ *
+ * @author Gernot Belger
+ */
+public interface ChartExtender {
+
+    /**
+     * Called after {@link DiagramGenerator#autoZoom(org.jfree.chart.plot.XYPlot)} was called, allows to tweak auto zoom
+     * behavior.
+     */
+    void afterAutoZoom(DiagramGenerator generator);
+
+    /**
+     * Called after the complete chart is generated.
+     * 
+     * @param plot
+     */
+    void afterGenerateChart(DiagramGenerator generator, XYPlot plot);
+}
\ No newline at end of file