X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fappletgui%2FFeatureRenderer.java;h=e11f1b484f1aea73fa822b58b35a3a61b64063df;hb=dfa04e77181fccfa6229ffef1591fc9c622d9b39;hp=0a40439d6395bdbec7b9042cf4af13c1cba6f75a;hpb=2f4f1d8fb6878271b64f327bc58c895f458137af;p=jalview.git

diff --git a/src/jalview/appletgui/FeatureRenderer.java b/src/jalview/appletgui/FeatureRenderer.java
index 0a40439..e11f1b4 100644
--- a/src/jalview/appletgui/FeatureRenderer.java
+++ b/src/jalview/appletgui/FeatureRenderer.java
@@ -79,31 +79,41 @@ public class FeatureRenderer implements jalview.api.FeatureRenderer
     }
   }
 
-  public void transferSettings(FeatureRenderer fr)
+  public void transferSettings(jalview.api.FeatureRenderer _fr)
   {
-    renderOrder = fr.renderOrder;
-    featureGroups = fr.featureGroups;
-    featureColours = fr.featureColours;
-    transparency = fr.transparency;
-    if (av != null && fr.av != null && fr.av != av)
+    if (_fr instanceof FeatureRenderer)
     {
-      if (fr.av.featuresDisplayed != null)
+      FeatureRenderer fr = (FeatureRenderer) _fr;
+      renderOrder = fr.renderOrder;
+      featureGroups = fr.featureGroups;
+      featureColours = fr.featureColours;
+      transparency = fr.transparency;
+      if (av != null && fr.av != null && fr.av != av)
       {
-        if (av.featuresDisplayed == null)
-        {
-          av.featuresDisplayed = new Hashtable();
-        }
-        else
+        if (fr.av.featuresDisplayed != null)
         {
-          av.featuresDisplayed.clear();
-        }
-        Enumeration en = fr.av.featuresDisplayed.keys();
-        while (en.hasMoreElements())
-        {
-          av.featuresDisplayed.put(en.nextElement(), Boolean.TRUE);
+          if (av.featuresDisplayed == null)
+          {
+            av.featuresDisplayed = new Hashtable();
+          }
+          else
+          {
+            av.featuresDisplayed.clear();
+          }
+          Enumeration en = fr.av.featuresDisplayed.keys();
+          while (en.hasMoreElements())
+          {
+            av.featuresDisplayed.put(en.nextElement(), Boolean.TRUE);
+          }
         }
       }
     }
+    else
+    {
+      throw new Error(
+              "Implementation error: cannot port feature settings from implementation of type "
+                      + _fr.getClass() + " to " + getClass());
+    }
   }
 
   static String lastFeatureAdded;