JAL-2839 Finder refactoring prior to fixing the defect

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

diff --git a/src/jalview/gui/IdPanel.java b/src/jalview/gui/IdPanel.java
index a1726f1..baac012 100755 (executable)
--- a/src/jalview/gui/IdPanel.java
+++ b/src/jalview/gui/IdPanel.java
@@ -147,7 +147,8 @@ public class IdPanel extends JPanel
   public void mouseWheelMoved(MouseWheelEvent e)
   {
     e.consume();
-    if (e.getWheelRotation() > 0)
+    double wheelRotation = e.getPreciseWheelRotation();
+    if (wheelRotation > 0)
     {
       if (e.isShiftDown())
       {
@@ -158,7 +159,7 @@ public class IdPanel extends JPanel
         av.getRanges().scrollUp(false);
       }
     }
-    else
+    else if (wheelRotation < 0)
     {
       if (e.isShiftDown())
       {
@@ -431,7 +432,7 @@ public class IdPanel extends JPanel
   {
     getIdCanvas().setHighlighted(list);
 
-    if (list == null)
+    if (list == null || list.isEmpty())
     {
       return;
     }