# HG changeset patch
# User dnt_bjoernsen <d.tironi@bjoernsen.de>
# Date 1550157799 -3600
# Node ID 4b54d2ee728eec7fd59c3df7cde1bfa292344493
# Parent  fd8f9e27af015592abea387799ea3d6839ff071f# Parent  6b2496d719361280e96bcb74a893cda9b7d432ce
Merge

diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/doc/conf/themes/default.xml
--- a/artifacts/doc/conf/themes/default.xml	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/doc/conf/themes/default.xml	Thu Feb 14 16:23:19 2019 +0100
@@ -2709,6 +2709,8 @@
       <field name="showarealabel" type="boolean" display="Flächenbeschriftung anzeigen" default="false" hints="hidden"/>
 
       <field name="showmaximum" type="boolean" display="Maximum anzeigen" default="false"/>
+
+      <field name="baselineColor" type="Color" display="Farbe der 0-Linie" default="0, 0, 0" hints="hidden"/>
     </fields>
   </theme>
   <theme name="SInfoFlowDepthDevelopment">
diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/doc/conf/themes/second.xml
--- a/artifacts/doc/conf/themes/second.xml	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/doc/conf/themes/second.xml	Thu Feb 14 16:23:19 2019 +0100
@@ -2697,6 +2697,8 @@
       <field name="showarealabel" type="boolean" display="Flächenbeschriftung anzeigen" default="false" hints="hidden"/>
 
       <field name="showmaximum" type="boolean" display="Maximum anzeigen" default="false"/>
+
+      <field name="baselineColor" type="Color" display="Farbe der 0-Linie" default="0, 0, 0" hints="hidden"/>
     </fields>
   </theme>
   <theme name="SInfoFlowDepthDevelopment">
diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/src/main/java/org/dive4elements/river/artifacts/bundu/bezugswst/BezugswstCalculation.java
--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/bundu/bezugswst/BezugswstCalculation.java	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/bundu/bezugswst/BezugswstCalculation.java	Thu Feb 14 16:23:19 2019 +0100
@@ -329,7 +329,7 @@
                     areas.add(Double.valueOf(0.0));
                 }
                 if (chDepth - getFieldValue(i, BunduResultType.depthFields, j) > 0.0001) {
-                    vExcav += computeMissingVolume(null, null, i, first, last, j, ExcavationMissingAreaComputer.Instance);
+                    vExcav += computeMissingVolume(null, null, i, first, last, j, ExcavationMissingHeightComputer.Instance);
                 }
             }
             final double[] meanBedVolumeArea = computeMeanBedMissingAreaAndVolume(i, first, last);
@@ -352,13 +352,15 @@
         final double dhCurr = heightcomputer.missingHeight(this.rows.get(current), current, first, last, field);
         final double dhPrev = heightcomputer.missingHeight(this.rows.get(current - 1), current - 1, first, last, field);
         final double dhNext = heightcomputer.missingHeight(this.rows.get(current + 1), current + 1, first, last, field);
-        final double kmCurr = missingKm(current);
-        final double kmPrev = missingKm(current - 1);
-        final double kmNext = missingKm(current + 1);
+        final double kmCurr = kmOfRow(current);
+        final double kmPrev = kmOfRow(current - 1);
+        final double kmNext = kmOfRow(current + 1);
         final double width = getFieldValue(current, BunduResultType.missWidthFields, field);
-        final double area1 = Double.isNaN(kmPrev) ? 0.0 : (0.25 * dhPrev + 0.75 * dhCurr) * width;
-        final double area2 = Double.isNaN(kmNext) ? 0.0 : (0.75 * dhCurr + 0.25 * dhNext) * width;
-        final double volume = Double.valueOf((Math.abs(kmCurr - kmPrev) * KM_TO_M / 2 * area1) + (Math.abs(kmNext - kmCurr) * KM_TO_M / 2 * area2));
+        final double area1 = (0.25 * dhPrev + 0.75 * dhCurr) * width;
+        final double dist1 = Double.isNaN(kmPrev) ? 0.0 : Math.abs(kmCurr - kmPrev) * KM_TO_M / 2;
+        final double area2 = (0.75 * dhCurr + 0.25 * dhNext) * width;
+        final double dist2 = Double.isNaN(kmNext) ? 0.0 : Math.abs(kmNext - kmCurr) * KM_TO_M / 2;
+        final double volume = dist1 * area1 + dist2 * area2;
         if (volumes != null)
             volumes.add(volume);
         if (areas != null) {
@@ -371,13 +373,17 @@
     }
 
     /**
-     * Interface for the function that computes the missing height of a field
+     * Interface for the function that computes/gets the missing height of a field
      */
     private interface MissingHeightComputer {
         /**
-         * Gets the missing area of a field and a row if in range, otherwise 0.0
+         * Gets the missing height of a field and a row if in range, otherwise 0.0
          */
         double missingHeight(final ResultRow row, final int rowIndex, final int first, final int last, final int fieldIndex);
+        /**
+         * Gets the mean missing height of a row if in range, otherwise 0.0
+         */
+        double missingMeanHeight(final ResultRow row, final int rowIndex, final int first, final int last);
     }
 
     /**
@@ -393,7 +399,21 @@
         @Override
         public double missingHeight(final ResultRow row, final int rowIndex, final int first, final int last, final int fieldIndex) {
             if ((first <= rowIndex) && (rowIndex <= last)) {
-                return ((List<Double>) row.getValue(BunduResultType.missDepthFields)).get(fieldIndex - 1).doubleValue();
+                final double dh = ((List<Double>) row.getValue(BunduResultType.missDepthFields)).get(fieldIndex - 1).doubleValue();
+                return (!Double.isNaN(dh) ? dh : 0.0);
+            }
+            else
+                return 0.0;
+        }
+
+        /**
+         * Gets the missing mean height of a row if in range, otherwise 0.0
+         */
+        @Override
+        public double missingMeanHeight(final ResultRow row, final int rowIndex, final int first, final int last) {
+            if ((first <= rowIndex) && (rowIndex <= last)) {
+                final double dh = row.getDoubleValue(BunduResultType.missDepthMeanBed);
+                return (!Double.isNaN(dh) ? dh : 0.0);
             }
             else
                 return 0.0;
@@ -403,8 +423,8 @@
     /**
      * Computation of the excavation height of a field
      */
-    private static class ExcavationMissingAreaComputer implements MissingHeightComputer {
-        public static MissingHeightComputer Instance = new ExcavationMissingAreaComputer();
+    private static class ExcavationMissingHeightComputer implements MissingHeightComputer {
+        public static MissingHeightComputer Instance = new ExcavationMissingHeightComputer();
 
         /**
          * Gets the excavation height of a field and a row if in range, otherwise 0.0
@@ -415,7 +435,21 @@
             if ((first <= rowIndex) && (rowIndex <= last)) {
                 final double channeldepth = row.getDoubleValue(BunduResultType.channelDepth) + EXCAVATION_DEPTH;
                 final double fielddepth = ((List<Double>) row.getValue(BunduResultType.depthFields)).get(fieldIndex - 1).doubleValue();
-                return (channeldepth - fielddepth);
+                return (!Double.isNaN(channeldepth - fielddepth) ? Math.max(channeldepth - fielddepth, 0.0) : 0.0);
+            }
+            else
+                return 0.0;
+        }
+
+        /**
+         * Gets the excavation mean height of a row if in range, otherwise 0.0
+         */
+        @Override
+        public double missingMeanHeight(final ResultRow row, final int rowIndex, final int first, final int last) {
+            if ((first <= rowIndex) && (rowIndex <= last)) {
+                final double channeldepth = row.getDoubleValue(BunduResultType.channelDepth) + EXCAVATION_DEPTH;
+                final double flowdepth = row.getDoubleValue(BunduResultType.flowdepthMeanBed);
+                return (!Double.isNaN(channeldepth - flowdepth) ? Math.max(channeldepth - flowdepth, 0.0) : 0.0);
             }
             else
                 return 0.0;
@@ -427,41 +461,29 @@
      */
     private double[] computeMeanBedMissingAreaAndVolume(final int current, final int first, final int last) {
 
-        final double dhCurr = meanBedMissingHeight(current, first, last);
+        final double dhCurr = ActualMissingHeightComputer.Instance.missingMeanHeight(this.rows.get(current), current, first, last);
         if (dhCurr < 0.0001)
             return new double[] { 0.0, 0.0 };
-        final double dhPrev = meanBedMissingHeight(current - 1, first, last);
-        final double dhNext = meanBedMissingHeight(current + 1, first, last);
-        final double kmCurr = missingKm(current);
-        final double kmPrev = missingKm(current - 1);
-        final double kmNext = missingKm(current + 1);
+        final double dhPrev = ActualMissingHeightComputer.Instance.missingMeanHeight(this.rows.get(current - 1), current - 1, first, last);
+        final double dhNext = ActualMissingHeightComputer.Instance.missingMeanHeight(this.rows.get(current + 1), current + 1, first, last);
+        final double kmCurr = kmOfRow(current);
+        final double kmPrev = kmOfRow(current - 1);
+        final double kmNext = kmOfRow(current + 1);
         final double width = this.rows.get(current).getDoubleValue(BunduResultType.channelWidth);
-        final double area1 = Double.isNaN(kmPrev) ? 0.0 : (0.25 * dhPrev + 0.75 * dhCurr) * width;
-        final double area2 = Double.isNaN(kmNext) ? 0.0 : (0.75 * dhCurr + 0.25 * dhNext) * width;
-        final double volume = Double.valueOf((Math.abs(kmCurr - kmPrev) * KM_TO_M / 2 * area1) + (Math.abs(kmNext - kmCurr) * KM_TO_M / 2 * area2));
-        final double area = Double.isNaN(volume) ? Double.NaN : Double.valueOf(area1 + area2);
+        final double area1 = (0.25 * dhPrev + 0.75 * dhCurr) * width;
+        final double dist1 = Double.isNaN(kmPrev) ? 0.0 : Math.abs(kmCurr - kmPrev) * KM_TO_M / 2;
+        final double area2 = (0.75 * dhCurr + 0.25 * dhNext) * width;
+        final double dist2 = Double.isNaN(kmNext) ? 0.0 : Math.abs(kmNext - kmCurr) * KM_TO_M / 2;
+        final double volume = dist1 * area1 + dist2 * area2;
+        final double area = Double.isNaN(volume) ? Double.NaN : area1 + area2;
         return new double[] { volume, area };
     }
 
     /**
-     * Gets the missing height of the mean bed level and a row if in range, otherwise 0.0
+     * Gets the km of a row index if within range, otherwise NaN
      */
-    private double meanBedMissingHeight(final int rowIndex, final int first, final int last) {
-        if ((first <= rowIndex) && (rowIndex <= last)) {
-            final double dh = this.rows.get(rowIndex).getDoubleValue(BunduResultType.channelDepth)
-                    - this.rows.get(rowIndex).getDoubleValue(BunduResultType.flowdepthMeanBed);
-            if (dh > 0.0)
-                return dh;
-            return 0.0;
-        }
-        return 0.0;
-    }
-
-    /**
-     * Gets the km of a row if within range, otherwise NaN
-     */
-    private double missingKm(final int rowIndex) {
-        if ((0 <= rowIndex) && (rowIndex <= this.rows.size() - 1) && (this.rows.get(rowIndex).getValue(BunduResultType.hasMissingDepth) != null))
+    private double kmOfRow(final int rowIndex) {
+        if ((0 <= rowIndex) && (rowIndex <= this.rows.size() - 1)) // && (this.rows.get(rowIndex).getValue(BunduResultType.hasMissingDepth) != null))
             return this.rows.get(rowIndex).getDoubleValue(GeneralResultType.station);
         return Double.NaN;
     }
diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/common/FlowDepthDevelopmentProcessor.java
--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/common/FlowDepthDevelopmentProcessor.java	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/common/FlowDepthDevelopmentProcessor.java	Thu Feb 14 16:23:19 2019 +0100
@@ -62,7 +62,7 @@
         super(I18N_AXIS_LABEL, HANDLED_FACET_TYPES);
     }
 
-    protected SInfoResultType doGetType(final String facetName) {
+    private SInfoResultType doGetType(final String facetName) {
 
         if (FACET_FLOW_DEPTH_DEVELOPMENT_FILTERED.contentEquals(facetName))
             return SInfoResultType.flowdepthDevelopment;
@@ -111,6 +111,6 @@
     @Override
     protected String generateSeries(final DiagramGenerator generator, final ArtifactAndFacet bundle, final ThemeDocument theme, final boolean visible) {
 
-        return buildSeriesForType(generator, bundle, theme, visible, doGetType(bundle.getFacetName()), null);
+        return buildSeriesForType(generator, bundle, theme, visible, doGetType(bundle.getFacetName()), GAP_DISTANCE);
     }
 }
\ No newline at end of file
diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/flowdepth/FlowDepthChartExtender.java
--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/flowdepth/FlowDepthChartExtender.java	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/flowdepth/FlowDepthChartExtender.java	Thu Feb 14 16:23:19 2019 +0100
@@ -9,9 +9,6 @@
  */
 package org.dive4elements.river.artifacts.sinfo.flowdepth;
 
-import java.awt.BasicStroke;
-import java.awt.Stroke;
-
 import org.dive4elements.river.exports.ChartExtender;
 import org.dive4elements.river.exports.DiagramGenerator;
 import org.jfree.chart.axis.ValueAxis;
@@ -60,15 +57,6 @@
 
     @Override
     public void afterGenerateChart(final DiagramGenerator generator, final XYPlot plot) {
-        final ValueAxis tkhAxis = generator.getAxis(TKH_AXIS);
-        if (tkhAxis != null) {
-            /* show baseline if tkhAxis is present */
-
-            // TODO: it would probably better to configure this via the ChartSettings, but currently no chart settings are loaded,
-            // so it is unclear if that feature still works.
-            final Stroke baselineStroke = new BasicStroke(2, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER);
-            plot.setRangeZeroBaselineStroke(baselineStroke);
-            plot.setRangeZeroBaselineVisible(true);
-        }
+        /* nothing to do */
     }
 }
\ No newline at end of file
diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/src/main/java/org/dive4elements/river/exports/XYChartGenerator.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/XYChartGenerator.java	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/XYChartGenerator.java	Thu Feb 14 16:23:19 2019 +0100
@@ -19,15 +19,24 @@
 import javax.swing.ImageIcon;
 
 import org.apache.log4j.Logger;
+import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
+import org.dive4elements.artifacts.CallContext;
+import org.dive4elements.river.jfree.AxisDataset;
+import org.dive4elements.river.jfree.Bounds;
+import org.dive4elements.river.jfree.CollisionFreeXYTextAnnotation;
+import org.dive4elements.river.jfree.DoubleBounds;
+import org.dive4elements.river.jfree.RiverAnnotation;
+import org.dive4elements.river.jfree.StyledAreaSeriesCollection;
+import org.dive4elements.river.jfree.StyledXYSeries;
+import org.dive4elements.river.themes.ThemeDocument;
 import org.jfree.chart.ChartFactory;
 import org.jfree.chart.JFreeChart;
-import org.jfree.chart.LegendItem;
 import org.jfree.chart.annotations.XYAnnotation;
 import org.jfree.chart.annotations.XYImageAnnotation;
 import org.jfree.chart.annotations.XYTextAnnotation;
+import org.jfree.chart.axis.LogarithmicAxis;
 import org.jfree.chart.axis.NumberAxis;
 import org.jfree.chart.axis.ValueAxis;
-import org.jfree.chart.axis.LogarithmicAxis;
 import org.jfree.chart.plot.Marker;
 import org.jfree.chart.plot.PlotOrientation;
 import org.jfree.chart.plot.XYPlot;
@@ -36,21 +45,9 @@
 import org.jfree.data.xy.XYDataset;
 import org.jfree.data.xy.XYSeries;
 import org.jfree.data.xy.XYSeriesCollection;
-import org.jfree.ui.RectangleInsets;
 import org.json.JSONArray;
 import org.json.JSONException;
 
-import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
-import org.dive4elements.artifacts.CallContext;
-import org.dive4elements.river.jfree.Bounds;
-import org.dive4elements.river.jfree.CollisionFreeXYTextAnnotation;
-import org.dive4elements.river.jfree.DoubleBounds;
-import org.dive4elements.river.jfree.RiverAnnotation;
-import org.dive4elements.river.jfree.StyledAreaSeriesCollection;
-import org.dive4elements.river.jfree.StyledXYSeries;
-import org.dive4elements.river.jfree.AxisDataset;
-import org.dive4elements.river.themes.ThemeDocument;
-
 
 /**
  * An abstract base class for creating XY charts.
@@ -385,7 +382,7 @@
             return;
         }
 
-        AxisDataset axisDataset = (AxisDataset) getAxisDataset(index);
+        AxisDataset axisDataset = getAxisDataset(index);
 
         if (visible) {
             axisDataset.addDataset(area);
@@ -484,11 +481,8 @@
 
         DoubleBounds dBounds = (DoubleBounds) bounds;
 
-        if (dBounds == null
-            || Double.isNaN((Double) dBounds.getLower())
-            || Double.isNaN((Double) dBounds.getUpper())) {
+        if ( Double.isNaN((Double) dBounds.getLower()) || Double.isNaN((Double) dBounds.getUpper()))
             return;
-        }
 
         Bounds old = getXBounds(index);
 
@@ -509,11 +503,8 @@
 
         DoubleBounds dBounds = (DoubleBounds) bounds;
 
-        if (dBounds == null
-            || Double.isNaN((Double) dBounds.getLower())
-            || Double.isNaN((Double) dBounds.getUpper())) {
+        if ( Double.isNaN((Double) dBounds.getLower()) || Double.isNaN((Double) dBounds.getUpper()))
             return;
-        }
 
         Bounds old = getYBounds(index);
 
@@ -631,7 +622,7 @@
                 return new Range(from, to);
             }
             catch (NumberFormatException nfe) {
-                log.warn("Wrong values for domain axis range.");
+                log.warn("Wrong values for domain axis range.", nfe);
             }
         }
 
@@ -662,7 +653,7 @@
                        : new Range(from, to);
             }
             catch (NumberFormatException nfe) {
-                log.warn("Wrong values for value axis range.");
+                log.warn("Wrong values for value axis range.", nfe);
             }
         }
 
@@ -910,7 +901,7 @@
         XYSeries series = new StyledXYSeries(aandf.getFacetName(), seriesName, theme);
 
         // Add text annotations for single points.
-        List<XYTextAnnotation> xy = new ArrayList<XYTextAnnotation>();
+        List<XYTextAnnotation> xy = new ArrayList<>();
 
         try {
             JSONArray points = new JSONArray((String) o);
@@ -929,7 +920,7 @@
             }
         }
         catch(JSONException e){
-            log.error("Could not decode json.");
+            log.error("Could not decode json.", e);
         }
 
         RiverAnnotation annotations =
diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/src/main/java/org/dive4elements/river/jfree/StableXYDifferenceRenderer.java
--- a/artifacts/src/main/java/org/dive4elements/river/jfree/StableXYDifferenceRenderer.java	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/jfree/StableXYDifferenceRenderer.java	Thu Feb 14 16:23:19 2019 +0100
@@ -120,6 +120,7 @@
 import org.jfree.chart.renderer.xy.AbstractXYItemRenderer;
 import org.jfree.chart.renderer.xy.XYItemRendererState;
 import org.jfree.chart.urls.XYURLGenerator;
+import org.jfree.data.Range;
 import org.jfree.data.xy.DefaultXYDataset;
 import org.jfree.data.xy.XYDataset;
 import org.jfree.data.xy.XYSeries;
@@ -196,6 +197,8 @@
     /** Font to draw label of calculated area with. */
     private Font labelFont;
 
+    private Color baseLineColor = null;
+
     /** Whether or not to draw a label that shows the title of the theme. */
     private boolean drawTitleLabel = false;
 
@@ -304,6 +307,10 @@
         this.labelBGColor = color;
     }
 
+    public void setBaseLineColor(final Color baseLineColor) {
+        this.baseLineColor = baseLineColor;
+    }
+
     /**
      * Sets color that is used if drawOutline is true.
      */
@@ -1261,6 +1268,8 @@
             // draw labels: only once per theme!
             drawAreaLabel(g2, dataArea, plot, domainAxis, rangeAxis);
             drawTitleLabel(g2, dataArea, info.getOwner().getEntityCollection(), dataset);
+
+            drawZeroBaseline(g2, dataArea, plot, domainAxis, rangeAxis);
         }
     }
 
@@ -1310,6 +1319,37 @@
         }
     }
 
+    private void drawZeroBaseline(final Graphics2D g2, final Rectangle2D dataArea, final XYPlot plot, final ValueAxis domainAxis, final ValueAxis rangeAxis) {
+
+        if (this.baseLineColor == null)
+            return;
+
+        final PlotOrientation orientation = plot.getOrientation();
+        final RectangleEdge domainAxisLocation = plot.getDomainAxisEdge();
+        final RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();
+
+        final Range domainRange = domainAxis.getRange();
+        final double x0 = domainRange.getLowerBound();
+        final double x1 = domainRange.getUpperBound();
+
+        final double screenX0 = domainAxis.valueToJava2D(x0, dataArea, domainAxisLocation);
+        final double screenX1 = domainAxis.valueToJava2D(x1, dataArea, domainAxisLocation);
+        final double screenY = rangeAxis.valueToJava2D(0.0, dataArea, rangeAxisLocation);
+
+        Shape baseLine;
+        if (PlotOrientation.HORIZONTAL == orientation)
+            baseLine = new Line2D.Double(screenY, screenX0, screenY, screenX1);
+        else
+            baseLine = new Line2D.Double(screenX0, screenY, screenX1, screenY);
+
+        if (baseLine.intersects(dataArea)) {
+            g2.setPaint(this.baseLineColor);
+            g2.setStroke(new BasicStroke(2));
+
+            g2.draw(baseLine);
+        }
+    }
+
     /**
      * Draws the visual representation of a single data item, second pass. In
      * the second pass, the renderer draws the lines and shapes for the
diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/src/main/java/org/dive4elements/river/jfree/StyledAreaSeriesCollection.java
--- a/artifacts/src/main/java/org/dive4elements/river/jfree/StyledAreaSeriesCollection.java	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/jfree/StyledAreaSeriesCollection.java	Thu Feb 14 16:23:19 2019 +0100
@@ -144,6 +144,7 @@
         applyShowLineLabel(renderer);
         applyPointStyle(renderer);
         applyShowMinimumMaximum(renderer);
+        applyBaseLineStyle(renderer);
         if (this.mode == FILL_MODE.UNDER) {
             renderer.setAreaCalculationMode(StableXYDifferenceRenderer.CALCULATE_NEGATIVE_AREA);
         } else if (this.mode == FILL_MODE.ABOVE) {
@@ -168,6 +169,11 @@
         // renderer.setIsMaximumShapeVisible(maximumVisible);
     }
 
+    private void applyBaseLineStyle(final StableXYDifferenceRenderer renderer) {
+        final Color c = this.theme.parseBaseLineColor();
+        renderer.setBaseLineColor(c);
+    }
+
     private void applyFillColor(final StableXYDifferenceRenderer renderer) {
 
         Paint paint = parseFillPaint();
diff -r fd8f9e27af01 -r 4b54d2ee728e artifacts/src/main/java/org/dive4elements/river/themes/ThemeDocument.java
--- a/artifacts/src/main/java/org/dive4elements/river/themes/ThemeDocument.java	Thu Feb 14 16:20:44 2019 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/themes/ThemeDocument.java	Thu Feb 14 16:23:19 2019 +0100
@@ -124,6 +124,8 @@
 
     public final static String SHOWEXTRAMARK = "showextramark";
 
+    private final static String BASE_LINE_COLOR = "baselineColor";
+
     /* boolean parameter if the range of this theme should be considered when auto-zooming. Only works for area-series at the moment */
     private static final String CALCULATE_RANGE = "calculateRange";
 
@@ -596,6 +598,10 @@
         return parseInteger(getTransparencyString(), 50);
     }
 
+    public Color parseBaseLineColor() {
+        final String colorStr = getValue(BASE_LINE_COLOR);
+        return parseColor(colorStr);
+    }
 
     /**
      * Gets color from color field.