X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FScalePanel.java;h=6912a020f8f1ceb1063f3398a9e68f163cd6199a;hb=2d8dfad8a0aa6a6febfc0c3bc0379de0b46e0cfc;hp=5da14b3a93e58b2fca92f3dec27bde7b32aa8ef7;hpb=7fb89dadbc3eac97602fc84e519014582abe4649;p=jalview.git

diff --git a/src/jalview/gui/ScalePanel.java b/src/jalview/gui/ScalePanel.java
index 5da14b3..6912a02 100755
--- a/src/jalview/gui/ScalePanel.java
+++ b/src/jalview/gui/ScalePanel.java
@@ -132,8 +132,9 @@ public class ScalePanel extends JPanel
     if (evt.isPopupTrigger()) // Mac: mousePressed
     {
       rightMouseButtonPressed(evt, res);
+      return;
     }
-    else if (SwingUtilities.isRightMouseButton(evt) && !Platform.isAMac())
+    if (Platform.isWinRightButton(evt))
     {
       /*
        * defer right-mouse click handling to mouse up on Windows
@@ -142,10 +143,7 @@ public class ScalePanel extends JPanel
        */
       return;
     }
-    else
-    {
-      leftMouseButtonPressed(evt, res);
-    }
+    leftMouseButtonPressed(evt, res);
   }
 
   /**
@@ -279,8 +277,11 @@ public class ScalePanel extends JPanel
     ap.getSeqPanel().stopScrolling();
 
     // todo res calculation should be a method on AlignViewport
-    int res = (evt.getX() / av.getCharWidth())
+    int xCords = Math.max(0, evt.getX()); // prevent negative X coordinates
+
+    int res = (xCords / av.getCharWidth())
             + av.getRanges().getStartRes();
+
     if (av.hasHiddenColumns())
     {
       res = av.getAlignment().getHiddenColumns()