hide grid for certain plot types

pdb-plotting/src/main/java/org/lucares/pdb/plot/api/BarChartHandler.java

@@ -41,6 +41,7 @@ public class BarChartHandler extends AggregateHandler {
         result.setAxis(getxAxis());
         result.setTicsEnabled(true);
         result.setFrom("0");
+        result.setShowGrid(false);
 
         return result;
     }

pdb-plotting/src/main/java/org/lucares/pdb/plot/api/CumulativeDistributionHandler.java

@@ -46,6 +46,7 @@ public class CumulativeDistributionHandler extends AggregateHandler {
         result.setTicIncrement(computeTicIncrement(settings));
         result.setFrom("0");
         result.setTo("100");
+        result.setShowGrid(getxAxis() == GnuplotAxis.X1);
         return result;
     }
 

pdb-plotting/src/main/java/org/lucares/pdb/plot/api/HistogramHandler.java

@@ -40,6 +40,7 @@ public class HistogramHandler extends AggregateHandler {
         result.setAxis(getxAxis());
         result.setTicsEnabled(true);
         result.setFrom("0");
+        result.setShowGrid(false);
         return result;
     }
 

pdb-plotting/src/main/java/org/lucares/pdb/plot/api/ParallelRequestsAggregate.java

@@ -33,6 +33,7 @@ public class ParallelRequestsAggregate extends AggregateHandler {
     public AxisSettings createXAxisSettings(final GnuplotSettings settings, final Collection<DataSeries> dataSeries) {
         final AxisSettings result = AxisTime.createXAxis(settings);
         result.setAxis(getxAxis());
+        result.setShowGrid(getxAxis() == GnuplotAxis.X1);
         return result;
     }
 

pdb-plotting/src/main/java/org/lucares/pdb/plot/api/ScatterAggregateHandler.java

@@ -33,6 +33,7 @@ public class ScatterAggregateHandler extends AggregateHandler {
     public AxisSettings createXAxisSettings(final GnuplotSettings settings, final Collection<DataSeries> dataSeries) {
         final AxisSettings result = AxisTime.createXAxis(settings);
         result.setAxis(getxAxis());
+        result.setShowGrid(getxAxis() == GnuplotAxis.X1);
         return result;
     }
 

pdb-plotting/src/main/java/org/lucares/recommind/logs/AxisSettings.java

@@ -29,6 +29,8 @@ public class AxisSettings {
 
     private boolean logscale;
 
+    private boolean showGrid = true;
+
     private List<String> ticsLabels;
 
     public String getFormat() {
@@ -119,6 +121,14 @@ public class AxisSettings {
         return ticsLabels;
     }
 
+    public void setShowGrid(final boolean showGrid) {
+        this.showGrid = showGrid;
+    }
+
+    public boolean isShowGrid() {
+        return showGrid;
+    }
+
     public String toGnuplotDefinition(final boolean renderLabels) {
         final StringBuilder result = new StringBuilder();
         if (type == Type.Time) {
@@ -159,6 +169,9 @@ public class AxisSettings {
         if (logscale) {
             appendfln(result, "set logscale %s", axis);
         }
+
+        appendfln(result, "set grid %s%stics", showGrid ? "" : "no", axis);
+
         return result.toString();
     }
 

pdb-plotting/src/main/java/org/lucares/recommind/logs/AxisTime.java

@@ -63,6 +63,7 @@ public class AxisTime {
         result.setLogscale(yAxisDefinition.isLogscale());
 
         result.setTics(YAxisTicks.computeYTicks(settings, yAxis, dataSeries));
+        result.setShowGrid(yAxis == GnuplotAxis.Y1);
 
         return result;
     }

pdb-plotting/src/main/java/org/lucares/recommind/logs/GnuplotFileGenerator.java

@@ -22,6 +22,7 @@ public class GnuplotFileGenerator implements Appender {
 
         appendfln(result, "set datafile separator \"%s\"", settings.getDatafileSeparator());
         appendfln(result, "set timefmt '%s'", settings.getTimefmt());
+        appendfln(result, "set grid");
 
         final List<AxisSettings> xAxisDefinitions = settings.getAggregates().getXAxisDefinitions(settings, dataSeries);
         for (final AxisSettings axisSettings : xAxisDefinitions) {
@@ -40,7 +41,6 @@ public class GnuplotFileGenerator implements Appender {
             appendln(result, axisSettings.toGnuplotDefinition(settings.isRenderLabels()));
         }
 
-        appendfln(result, "set grid");
         appendfln(result, "set output \"%s\"", settings.getOutput().toAbsolutePath().toString().replace("\\", "/"));
 
         appendfln(result, "set key font \",%d\"", KEY_FONT_SIZE);