--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java	Tue Sep 27 14:03:06 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java	Tue Sep 27 14:37:18 2011 +0000
@@ -177,14 +177,24 @@
 
 
     /**
-     * This method overrides the XYChartGenerators zoomY method to include the 0
-     * value on the Q axis.
+     * Create a range that includes 0 (for the Q axis).
+     * @param range range with which to look up upper bound.
+     * @return range with 0 included.
+     */
+    protected Range createSecondAxisRange(Range range) {
+       return new Range(0d, range.getUpperBound());
+    }
+
+
+    /**
+     * This method overrides the XYChartGenerators zoomY method to be able to
+     * modify the range of the Q axis (here, it shall include 0).
      */
     @Override
     protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) {
         if (plot.getRangeAxisIndex(axis) == 1) {
-            // we want the Q axis to start at 0 if no zooming has been done
-            range = new Range(0d, range.getUpperBound());
+            // We want the Q axis to start at 0 if no zooming has been done.
+            range = createSecondAxisRange(range);
         }
 
         return super.zoomY(plot, axis, range, x);