# HG changeset patch
# User Tom Gottfried <tom@intevation.de>
# Date 1430930817 -7200
# Node ID e6d0fc817e20a084ccb9e680937dacdc826974aa
# Parent  afa2096a1f156026c34ac21cd866a4f1bbee92c1
(issue1798) Handle the case when there are no data in the diagram.

diff -r afa2096a1f15 -r e6d0fc817e20 artifacts/src/main/java/org/dive4elements/river/exports/DischargeGenerator.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/DischargeGenerator.java	Wed May 06 17:59:38 2015 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/DischargeGenerator.java	Wed May 06 18:46:57 2015 +0200
@@ -14,7 +14,9 @@
 import org.dive4elements.river.exports.injector.InjectorConstants;
 import org.dive4elements.river.jfree.AxisDataset;
 import org.dive4elements.river.jfree.DoubleBounds;
+
 import org.jfree.chart.axis.NumberAxis;
+import org.jfree.chart.axis.ValueAxis;
 import org.jfree.chart.plot.XYPlot;
 import org.jfree.data.Range;
 
@@ -109,19 +111,24 @@
     @Override
     protected void autoZoom(XYPlot plot) {
         super.autoZoom(plot);
-        IdentifiableNumberAxis idA = (IdentifiableNumberAxis) plot.getRangeAxis(wAxisIndex);
-        Range fixedRange = getRangeForAxisFromSettings(idA.getId());
-        if (fixedRange == null) {
-            return;
+
+        ValueAxis wAxis = plot.getRangeAxis(wAxisIndex);
+        if (wAxis instanceof IdentifiableNumberAxis) {
+            IdentifiableNumberAxis idA = (IdentifiableNumberAxis)wAxis;
+            Range fixedRange = getRangeForAxisFromSettings(idA.getId());
+            if (fixedRange == null) {
+                return;
+            }
+
+            log.debug("Adjusting helper centimeter axis to fixed range.");
+            Range adjustedRange = inCm(
+                fixedRange,
+                pnpValue
+            );
+            IdentifiableNumberAxis wInCmAxis=
+                (IdentifiableNumberAxis) plot.getRangeAxis(wInCmAxisIndex);
+            wInCmAxis.setRange(adjustedRange);
         }
-        log.debug("Adjusting helper centimeter axis to fixed range.");
-        Range adjustedRange = inCm(
-            fixedRange,
-            pnpValue
-        );
-        IdentifiableNumberAxis wInCmAxis=
-            (IdentifiableNumberAxis) plot.getRangeAxis(wInCmAxisIndex);
-        wInCmAxis.setRange(adjustedRange);
     }
 }
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