X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fdatamodel%2FAlignment.java;h=ac00fa2a0f93ff7dce698eb2d6eae63805a70b3e;hb=7e00183505bd4c58d1ce62ee121ed372c3b058f2;hp=93ad332d24f13d9babd3c7d253a151c745d971d1;hpb=08a853afa3f76ec24a175e37bff43dc18ef781b1;p=jalview.git

diff --git a/src/jalview/datamodel/Alignment.java b/src/jalview/datamodel/Alignment.java
index 93ad332..ac00fa2 100755
--- a/src/jalview/datamodel/Alignment.java
+++ b/src/jalview/datamodel/Alignment.java
@@ -717,6 +717,17 @@ public class Alignment implements AlignmentI
     return maxLength;
   }
 
+  @Override
+  public int getVisibleWidth()
+  {
+    int w = getWidth();
+    if (hiddenCols != null)
+    {
+      w -= hiddenCols.getSize();
+    }
+    return w;
+  }
+
   /**
    * DOCUMENT ME!
    * 
@@ -1893,9 +1904,12 @@ public class Alignment implements AlignmentI
   }
 
   @Override
-  public void setHiddenColumns(HiddenColumns cols)
+  public boolean setHiddenColumns(HiddenColumns cols)
   {
+    boolean changed = cols == null ? hiddenCols != null
+            : !cols.equals(hiddenCols);
     hiddenCols = cols;
+    return changed;
   }
 
   @Override