JAL-3997 check for tooltip being null before checking equivalence to last tooltip...

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

diff --git a/src/jalview/gui/SeqPanel.java b/src/jalview/gui/SeqPanel.java
index 54e3db7..111b4c0 100644 (file)
--- a/src/jalview/gui/SeqPanel.java
+++ b/src/jalview/gui/SeqPanel.java
@@ -1184,7 +1184,8 @@ public class SeqPanel extends JPanel
 
     String tooltip = AnnotationPanel.buildToolTip(anns[rowIndex], column,
             anns);
-    if (!tooltip.equals(lastTooltip))
+    if (tooltip == null ? tooltip != lastTooltip
+            : !tooltip.equals(lastTooltip))
     {
       lastTooltip = tooltip;
       lastFormattedTooltip = tooltip == null ? null