repaint when turning Highlight feature on and off

diylc/diylc-swing/src/org/diylc/swing/plugins/canvas/CanvasPlugin.java

@@ -219,6 +219,15 @@ public class CanvasPlugin implements IPlugIn, ClipboardOwner {
           }
         });
     
+    ConfigurationManager.getInstance().addConfigListener(IPlugInPort.HIGHLIGHT_CONTINUITY_AREA,
+        new IConfigListener() {
+
+          @Override
+          public void valueChanged(String key, Object value) {            
+            canvasPanel.repaint();
+          }
+        });
+
     getScrollPane().getViewport().setVisible(false);
   }