--- a/flys-artifacts/ChangeLog	Mon Oct 10 10:12:51 2011 +0000
+++ b/flys-artifacts/ChangeLog	Mon Oct 10 10:27:45 2011 +0000
@@ -1,3 +1,9 @@
+2011-10-10  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java:
+	  Use slightly modified doWOut-implementation from
+	  LongitudinalSectionGenerator (here need to add Ws to different axis).
+
 2011-10-10  Felix Wolfsteller <felix.wolfsteller@intevation.de>
 
 	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelPairSelectState.java:

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java	Mon Oct 10 10:12:51 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java	Mon Oct 10 10:27:45 2011 +0000
@@ -19,12 +19,8 @@
 import de.intevation.flys.artifacts.model.WKms;
 
 import de.intevation.flys.utils.DataUtil;
-import de.intevation.flys.model.River;
-
-import de.intevation.flys.artifacts.WINFOArtifact;
 
 import de.intevation.flys.artifacts.model.WQKms;
-import de.intevation.flys.utils.FLYSUtils;
 
 
 
@@ -45,6 +41,9 @@
     public static final String I18N_CHART_SUBTITLE =
         "chart.w_differences.subtitle";
 
+    public static final String I18N_YAXIS_LABEL =
+        "chart.w_differences.yaxis.label";
+
     public static final String I18N_2YAXIS_LABEL =
         "chart.w_differences.yaxis.second.label";
 
@@ -100,18 +99,9 @@
                 visible);
         }
         else if (name.equals(LONGITUDINAL_W)) {
-            WINFOArtifact flysArtifact = (WINFOArtifact) artifact;
-            facet = flysArtifact.getNativeFacet(facet);
-
-            doWaterlevelOut(
-                (WQKms) facet.getData(artifact, context),
-                f.getDescription(),
-                attr,
-                flysArtifact,
-                visible);
-
+            doWOut((WQKms) f.getData(artifact, context), attr, visible);
         }
-       else {
+        else {
             logger.warn("Unknown facet name: " + name);
             return;
         }
@@ -121,51 +111,32 @@
     /**
      * Add the waterlevel-curves (the "absolutes" from which
      * differences were calculated).
+     *
      * @param wqkms The wqkms to add to the diagram.
+     * @param theme The theme that contains styling information.
      */
-    public void doWaterlevelOut(WQKms wqkms,
-         String        description,
-         Document      theme,
-         WINFOArtifact flysArtifact,
-         boolean       visible
-    ) {
-        String wqkmsName = wqkms.getName();
+    @Override
+    protected void doWOut(WQKms wqkms, Document theme, boolean visible) {
+        logger.debug("WDifferencesCurveGenerator.doWOut");
 
-        River river = FLYSUtils.getRiver(flysArtifact);
+        XYSeries series = new StyledXYSeries(getSeriesName(wqkms, "W"), theme);
 
-        if (river == null) {
-            logger.warn("no river found");
-            return;
+        int size = wqkms.size();
+
+        for (int i = 0; i < size; i++) {
+            series.add(wqkms.getKm(i), wqkms.getW(i));
         }
 
-        logger.debug("WDifferencesCurveGenerator.doWaterlevelOut, gauge: " +
-            wqkmsName);
-        /*
-        Gauge gauge = river.determineGaugeByName(wqkmsName);
-
-        if (gauge == null) {
-            logger.warn("no gauge found");
-            return;
-        }
-        */
-
+        // Note: the only difference in the super-implementation
+        //  (in LongitudinalSectionGenerator) is here (adds with
+        //  addFirstAxisSeries() .
+        addSecondAxisSeries(series, visible);
 
-        double [][] values = new double [][] {
-            wqkms.getKms(), wqkms.getWs() };
-
-        int size = values != null ? values[0].length : 0;
-
-        String seriesName = wqkmsName;
-        //getSeriesName(gauge);
+        if (needInvertAxis(wqkms)) {
+            setInverted(true);
+        }
+    }
 
-        XYSeries series = new StyledXYSeries(seriesName, theme);
-
-        for (int i = 0; i < size; i++) {
-            series.add(values[0][i], values[1][i]);
-        }
-
-        addSecondAxisSeries(series, visible);
-    }
 
     /**
      * Add items to dataseries which describes the differences.