--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/WDifferencesCurveGenerator.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,109 @@
+package org.dive4elements.river.exports;
+
+import org.dive4elements.river.artifacts.model.FacetTypes;
+import org.dive4elements.river.artifacts.model.WKms;
+
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.plot.XYPlot;
+
+
+/**
+ * An OutGenerator that generates w differences curves.
+ */
+public class WDifferencesCurveGenerator
+extends      LongitudinalSectionGenerator
+implements   FacetTypes
+{
+    public enum YAXIS {
+        W(0),
+        D(1),
+        Q(2);
+        protected int idx;
+        private YAXIS(int c) {
+           idx = c;
+        }
+    }
+
+    /** Key for internationalized title of WDiff charts. */
+    public final static String I18N_WDIFF_TITLE = "chart.w_differences.title";
+
+    /** Default for internationalized title (when no translation found). */
+    public final static String I18N_WDIFF_TITLE_DEFAULT = "Differences";
+
+    public final static String I18N_WDIFF_SUBTITLE =
+        "chart.w_differences.subtitle";
+
+
+    @Override
+    protected YAxisWalker getYAxisWalker() {
+        return new YAxisWalker() {
+            @Override
+            public int length() {
+                return YAXIS.values().length;
+            }
+
+            @Override
+            public String getId(int idx) {
+                YAXIS[] yaxes = YAXIS.values();
+                return yaxes[idx].toString();
+            }
+        };
+    }
+
+
+    /**
+     * Get internationalized title for chart.
+     * @return internationalized Chart title.
+     */
+    @Override
+    public String getDefaultChartTitle() {
+        return msg(I18N_WDIFF_TITLE, I18N_WDIFF_TITLE_DEFAULT);
+    }
+
+
+    @Override
+    protected String getDefaultChartSubtitle() {
+        return getRiverName();
+    }
+
+
+    /**
+     * Gets key to look up internationalized String for the charts subtitle.
+     * @return key to look up translated subtitle.
+     */
+    @Override
+    protected String getChartSubtitleKey() {
+        return I18N_WDIFF_SUBTITLE;
+    }
+
+
+    /**
+     *
+     */
+    @Override
+    public JFreeChart generateChart() {
+        JFreeChart chart = super.generateChart();
+        if (chart != null && chart.getPlot() != null) {
+            XYPlot plot = (XYPlot) chart.getPlot();
+            plot.setRangeZeroBaselineVisible(true);
+        }
+        return chart;
+    }
+
+
+    /**
+     * Get name of series (displayed in legend).
+     * @return name of the series.
+     */
+    protected String getSeriesName(WKms wqkms, String mode) {
+        String name   = wqkms.getName();
+        String prefix = (name != null && name.indexOf(mode) >= 0)
+                      ? null
+                      : mode;
+
+        return (prefix != null && prefix.length() > 0)
+                ? prefix + "(" + name +")"
+                : name;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :