Added method to lookup value range by colour

CPS/src/lu/list/itis/dkd/tui/utility/scales/ColourScale.java

@@ -18,6 +18,7 @@ import lu.list.itis.dkd.tui.bootstrapping.BootstrappingUtils;
 import lu.list.itis.dkd.tui.bootstrapping.ShapeBootstrapper;
 import lu.list.itis.dkd.tui.exception.BuildException;
 import lu.list.itis.dkd.tui.utility.ColorFactory;
+import lu.list.itis.dkd.tui.utility.ColorUtils;
 import lu.list.itis.dkd.tui.utility.CpsNamespace;
 import lu.list.itis.dkd.tui.utility.Externalization;
 import lu.list.itis.dkd.tui.utility.StringUtils;
@@ -74,6 +75,8 @@ public class ColourScale<T extends Comparable<T>> {
     private static final Font DEFAULT_FONT = new Font("Arial", Font.PLAIN, 12);
     private static final Shape DEFAULT_SHAPE = ShapeFactory.buildSquare(12);
 
+    private static final double MAX_SIMILARITY_DISTANCE = 10d;
+
     private static final Logger LOGGER = LoggerFactory.getLogger(ColourScale.class.getSimpleName());
 
     // ---------------------------------------------------------------------------
@@ -294,6 +297,20 @@ public class ColourScale<T extends Comparable<T>> {
         return this.defaultColour;
     }
 
+    // ---------------------------------------------------------------------------
+
+    public ValueRange<T> getValueFor(Color color) {
+        ValueRange<T> range = null;
+
+        for (ColourMapping<T> mapping : mappings) {
+            if (ColorUtils.areSimilar(mapping.getColour(), color, MAX_SIMILARITY_DISTANCE)) {
+                range = mapping.getRange();
+                break;
+            }
+        }
+        return range;
+    }
+
     // ---------------------------------------------------------------------------
     /**
      * Returns a list of all mappings present in this colour scale.