# HG changeset patch
# User Felix Wolfsteller <felix.wolfsteller@intevation.de>
# Date 1372836842 -7200
# Node ID 30c6da3bfc86b6321e8a928748fffc6a3f2d73b7
# Parent  cf3065a17057a3bc33a8ebdaa592fcf585bd4be2
In analogy to w values allow q values to be calculated at the
correct km in fix settings (bug spotted while working on issue1370).

diff -r cf3065a17057 -r 30c6da3bfc86 artifacts/src/main/java/org/dive4elements/river/artifacts/MainValuesArtifact.java
--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/MainValuesArtifact.java	Tue Jul 02 15:43:11 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/MainValuesArtifact.java	Wed Jul 03 09:34:02 2013 +0200
@@ -373,6 +373,41 @@
      * Get a list of "Q" main values.
      * @return list of Q main values.
      */
+    public List<NamedDouble> getMainValuesQ(double[] kms) {
+        List<NamedDouble> filteredList = new ArrayList<NamedDouble>();
+        boolean atGauge = false;
+        Gauge gauge = getGauge(kms[0]);
+        WstValueTable interpolator = WstValueTableFactory.getTable(RiverUtils.getRiver(this));
+        Calculation c = new Calculation();
+        double w_out[] = {0.0f};
+        double q_out[] = {0.0f};
+        if (gauge != null) {
+            double gaugeStation = gauge.getStation().doubleValue();
+            atGauge = Math.abs(kms[0] - gaugeStation) < 1e-4;
+            List<MainValue> orig = gauge.getMainValues();
+            for (MainValue mv : orig) {
+                if (mv.getMainValue().getType().getName().equals("Q")) {
+                    if (atGauge) {
+                        q_out[0] = mv.getValue().doubleValue();
+                    }
+                    else {
+                        interpolator.interpolate(mv.getValue().doubleValue(),
+                            gaugeStation, kms, w_out, q_out, c);
+                    }
+                    filteredList.add(new NamedDouble(
+                                mv.getMainValue().getName(),
+                                q_out[0]
+                                ));
+                }
+            }
+        }
+        return filteredList;
+    }
+
+    /**
+     * Get a list of "Q" main values.
+     * @return list of Q main values.
+     */
     public List<NamedDouble> getMainValuesQ(boolean atGauge) {
         List<NamedDouble> filteredList = new ArrayList<NamedDouble>();
         Gauge gauge = getGauge();
@@ -381,8 +416,8 @@
         double w_out[] = {0.0f};
         double q_out[] = {0.0f};
         double kms[] = {getLocation()};
-        double gaugeStation = gauge.getStation().doubleValue();
         if (gauge != null) {
+            double gaugeStation = gauge.getStation().doubleValue();
             List<MainValue> orig = gauge.getMainValues();
             for (MainValue mv : orig) {
                 if (mv.getMainValue().getType().getName().equals("Q")) {
diff -r cf3065a17057 -r 30c6da3bfc86 artifacts/src/main/java/org/dive4elements/river/artifacts/model/MainValuesQFacet.java
--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/MainValuesQFacet.java	Tue Jul 02 15:43:11 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/MainValuesQFacet.java	Wed Jul 03 09:34:02 2013 +0200
@@ -25,6 +25,7 @@
 import org.dive4elements.river.jfree.StickyAxisAnnotation;
 
 import org.dive4elements.river.exports.DurationCurveGenerator;
+import org.dive4elements.river.exports.fixings.FixChartGenerator;
 
 
 /**
@@ -89,7 +90,8 @@
      * Returns the data this facet requires.
      *
      * @param artifact the owner artifact.
-     * @param context  the CallContext (ignored).
+     * @param context  the CallContext (can be used to find out if in
+     *                 navigable fixation-setting, or durationcurve).
      *
      * @return the data.
      */
@@ -105,6 +107,15 @@
             getDataProvider(DurationCurveFacet.BB_DURATIONCURVE);
         if (providers.size() < 1) {
             logger.warn("Could not find durationcurve data provider.");
+            // Do we have a current km in context?
+            // If so, we are likely fetching data for a navigable
+            // diagram (i.e. in fixation branch).
+            if (context.getContextValue(FixChartGenerator.CURRENT_KM) != null) {
+                Double ckm = (Double) context.getContextValue(FixChartGenerator.CURRENT_KM);
+                // Return linearly interpolated values, in m if not at gauge,
+                // in cm if at gauge.
+                qs = mvArtifact.getMainValuesQ(new double[] {ckm});
+            }
         }
         else {
             wqdays = (WQDay) providers.get(0).provideData(