--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/HistoricalDischargeWQCurveGenerator.java	Mon Oct 29 05:56:36 2012 +0100
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/HistoricalDischargeWQCurveGenerator.java	Mon Oct 29 05:59:27 2012 +0100
@@ -10,6 +10,7 @@
 import de.intevation.flys.artifacts.model.FacetTypes;
 import de.intevation.flys.artifacts.model.Timerange;
 import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.jfree.StyledValueMarker;
 import de.intevation.flys.jfree.StyledXYSeries;
 import de.intevation.flys.utils.FLYSUtils;
 
@@ -128,16 +129,14 @@
 
     protected void doHistoricalDischargeOutQ(FLYSArtifact artifact,
         Object data, String desc, Document theme, boolean visible) {
-        logger.debug("doHistoricalDischargeOutQ(): description = " + desc);
-
-        // addAxisDataset(series, YAXIS.Q.idx, visible);
+        double value = Double.valueOf(data.toString());
+        addDomainMarker(new StyledValueMarker(value, theme), visible);
     }
 
     protected void doHistoricalDischargeOutW(FLYSArtifact artifact,
         Object data, String desc, Document theme, boolean visible) {
-        logger.debug("doHistoricalDischargeOutW(): description = " + desc);
-
-        // addAxisDataset(series, YAXIS.W.idx, visible);
+        double value = Double.valueOf(data.toString());
+        addValueMarker(new StyledValueMarker(value, theme), visible);
     }
 
     protected void doHistoricalDischargeCurveOut(FLYSArtifact artifact,

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java	Mon Oct 29 05:56:36 2012 +0100
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java	Mon Oct 29 05:59:27 2012 +0100
@@ -503,11 +503,20 @@
      * Add the given vertical marker to the chart.
      */
     public void addDomainMarker(Marker marker) {
-        if (marker == null) {
-            return;
+        addDomainMarker(marker, true);
+    }
+
+
+    /**
+     * Add the given vertical marker to the chart.<b>Note:</b> the marker is
+     * added to the chart only if it is not null and if <i>visible</i> is true.
+     * @param marker The marker that should be added to the chart.
+     * @param visible The visibility of the marker.
+     */
+    public void addDomainMarker(Marker marker, boolean visible) {
+        if (visible && marker != null) {
+            domainMarkers.add(marker);
         }
-
-        domainMarkers.add(marker);
     }
 
 
@@ -515,11 +524,20 @@
      * Add the given vertical marker to the chart.
      */
     public void addValueMarker(Marker marker) {
-        if (marker == null) {
-            return;
+        addValueMarker(marker, true);
+    }
+
+
+    /**
+     * Add the given horizontal marker to the chart.<b>Note:</b> the marker is
+     * added to the chart only if it is not null and if <i>visible</i> is true.
+     * @param marker The marker that should be added to the chart.
+     * @param visible The visibility of the marker.
+     */
+    public void addValueMarker(Marker marker, boolean visible) {
+        if (visible && marker != null) {
+            valueMarkers.add(marker);
         }
-
-        valueMarkers.add(marker);
     }