X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fviewmodel%2FAlignmentViewport.java;fp=src%2Fjalview%2Fviewmodel%2FAlignmentViewport.java;h=c4923cf67ba29fc74ee6370a31efd9477f90ca69;hb=90b92c1738543661c2ab1e52d6662620ed705499;hp=1366ada6cc7acd4188e867b289fb0e6aa827d015;hpb=5bf0d6b5cb67e66a38e82692c40426c21ba12593;p=jalview.git

diff --git a/src/jalview/viewmodel/AlignmentViewport.java b/src/jalview/viewmodel/AlignmentViewport.java
index 1366ada..c4923cf 100644
--- a/src/jalview/viewmodel/AlignmentViewport.java
+++ b/src/jalview/viewmodel/AlignmentViewport.java
@@ -2954,4 +2954,32 @@ public abstract class AlignmentViewport
   {
     return currentTree;
   }
+
+  /**
+   * flag set to indicate if structure views might be out of sync with sequences
+   * in the alignment
+   */
+
+  private boolean needToUpdateStructureViews = false;
+
+  @Override
+  public boolean isUpdateStructures()
+  {
+    return needToUpdateStructureViews;
+  }
+
+  @Override
+  public void setUpdateStructures(boolean update)
+  {
+    needToUpdateStructureViews = update;
+  }
+
+  @Override
+  public boolean needToUpdateStructureViews()
+  {
+    boolean update = needToUpdateStructureViews;
+    needToUpdateStructureViews = false;
+    return update;
+  }
+
 }