catch NullPointerException clicking outside tree node

git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@3806 ee4ac58c-ac51-4696-9907-e4b3aa274f04

uk/ac/sanger/artemis/components/DatabaseJFrame.java

@@ -20,7 +20,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  *
- * $Header: //tmp/pathsoft/artemis/uk/ac/sanger/artemis/components/DatabaseJFrame.java,v 1.5 2005-08-04 15:58:05 tjc Exp $
+ * $Header: //tmp/pathsoft/artemis/uk/ac/sanger/artemis/components/DatabaseJFrame.java,v 1.6 2005-11-08 20:12:27 tjc Exp $
  */
 
 package uk.ac.sanger.artemis.components;
@@ -119,10 +119,16 @@ public class DatabaseJFrame extends JFrame
     Cursor cbusy = new Cursor(Cursor.WAIT_CURSOR);
     Cursor cdone = new Cursor(Cursor.DEFAULT_CURSOR);
 
-    String node_name = entry_source.getSelectedNode(tree);
-    String id =  entry_source.getEntryID(node_name);
-    if(id != null)
-      getEntryEditFromDatabase(id, entry_source, tree, art_main);
+    String node_name = null;
+
+    try
+    {
+      node_name = entry_source.getSelectedNode(tree);
+      String id =  entry_source.getEntryID(node_name);
+      if(id != null)
+        getEntryEditFromDatabase(id, entry_source, tree, art_main);
+    }
+    catch(NullPointerException npe){}
   }