From 81029aa176cd9a4553e297f7be95931dddc89974 Mon Sep 17 00:00:00 2001
From: gmungoc <g.m.carstairs@dundee.ac.uk>
Date: Thu, 19 Mar 2020 12:29:46 +0000
Subject: [PATCH] JAL-3305 don't propagate an empty SelectionGroup to
 complement view

---
 src/jalview/gui/SeqPanel.java |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/jalview/gui/SeqPanel.java b/src/jalview/gui/SeqPanel.java
index 7020265..08e1194 100644
--- a/src/jalview/gui/SeqPanel.java
+++ b/src/jalview/gui/SeqPanel.java
@@ -2763,7 +2763,7 @@ public class SeqPanel extends JPanel
      * Map sequence selection
      */
     SequenceGroup sg = MappingUtils.mapSequenceGroup(seqsel, sourceAv, av);
-    av.setSelectionGroup(sg);
+    av.setSelectionGroup(sg != null && sg.getSize() > 0 ? sg : null);
     av.isSelectionGroupChanged(true);
 
     /*
-- 
1.7.10.2