=== modified file 'src/com/goldencode/p2j/ui/client/gui/ScrollBarGuiButton.java'
--- src/com/goldencode/p2j/ui/client/gui/ScrollBarGuiButton.java	2015-11-27 18:10:35 +0000
+++ src/com/goldencode/p2j/ui/client/gui/ScrollBarGuiButton.java	2015-12-23 10:35:20 +0000
@@ -30,6 +30,7 @@
 **                  we have to track the mouse release, not click.  Adding auto-scroll feature on
 **                  press and hold mouse button.  The mouse executor shoule be stopped on widget
 **                  destroy to free the resources.  Changing static executor to be instance based.
+** 012 SBI 20151223 Emits only valid auto scroll events.
 */
 
 package com.goldencode.p2j.ui.client.gui;
@@ -246,8 +247,11 @@
                         // emit the sequential scroll events
                         ScrollEvent evt =
                            ((ScrollBarGuiImpl)owner).createAutoScrollEvent(position);
-                                 
-                        tc.postOSEvent(evt);
+                        
+                        if (evt != null)
+                        {
+                           tc.postOSEvent(evt);
+                        }
                      }
                   }
                   catch (InterruptedException ex)

=== modified file 'src/com/goldencode/p2j/ui/client/gui/ScrollBarGuiImpl.java'
--- src/com/goldencode/p2j/ui/client/gui/ScrollBarGuiImpl.java	2015-11-27 18:10:35 +0000
+++ src/com/goldencode/p2j/ui/client/gui/ScrollBarGuiImpl.java	2015-12-23 10:46:56 +0000
@@ -40,6 +40,7 @@
 **                  to scroll - it is not required to draw the thumb.  Fix for background drawing.
 ** 019 EVL 20151125 Adding executor shutdown to prevent resource leak.  Changing static executor
 **                  to be instance based.
+** 020 SBI 20151223 Changed createAutoScrollEvent() to create only valid auto scroll events.
 */
 
 package com.goldencode.p2j.ui.client.gui;
@@ -749,23 +750,42 @@
    }
    
    /**
-    * Create GUI specific auto-scroll event.
-    * 
-    * @param   btn
-    *          The source button that caused the event.
+    * Create GUI specific auto-scroll event if the changed position is valid, otherwise it returns
+    * null indicating that it is not required to send scroll events due to the current scroller's
+    * position reaches its bounds. 
+    * 
+    * @param    btn
+    *           The source button that caused the event.
+    * 
+    * @return   Returns the valid scroll event if the current scroller's position doesn't reach
+    *           its bounds, otherwise null.
     */
    public ScrollEvent createAutoScrollEvent(Position btn)
    {
+      if (position >= max && btn == ScrollBar.Position.RIGHT
+               || position <= 0 && btn == ScrollBar.Position.LEFT)
+      {
+         return null;
+      }
+      
       // start with the current position
       int newPos = position;
-                        
+      
       if (btn == ScrollBar.Position.RIGHT)
       {
          newPos += shortStep;
+         if (newPos > max)
+         {
+            newPos = max;
+         }
       }
       else
       {
          newPos -= shortStep;
+         if (newPos < 0)
+         {
+            newPos = 0;
+         }
       }
       
       return createScrollEvent(newPos);