JAL-4134 fix NPEs when matrix not resolved or alignment view is closed

[jalview.git] / src / jalview / gui / TreeCanvas.java

diff --git a/src/jalview/gui/TreeCanvas.java b/src/jalview/gui/TreeCanvas.java
index 98026da..cae2f31 100755 (executable)
--- a/src/jalview/gui/TreeCanvas.java
+++ b/src/jalview/gui/TreeCanvas.java
@@ -1034,7 +1034,13 @@ public class TreeCanvas extends JPanel implements MouseListener, Runnable,
     {
       return false;
     }
+    if (av==null||av.getAlignment()==null)
+    {
+      // alignment is closed
+      return false;
+    }
     ColumnSelection cs = av.getColumnSelection();
+    
     HiddenColumns hc = av.getAlignment().getHiddenColumns();
     int offp = (rseq != null) ? rseq.findIndex(rseq.getStart() + colm)
             : colm;
@@ -1055,6 +1061,12 @@ public class TreeCanvas extends JPanel implements MouseListener, Runnable,
           Color col)
   {
     SequenceI rseq = tp.assocAnnotation.sequenceRef;
+    if (av==null||av.getAlignment()==null)
+    {
+      // alignment is closed
+      return;
+    }
+
     for (BinaryNode bn:l)
     {
       int colm=-1;