diff --git a/src/univ/slider.cpp b/src/univ/slider.cpp
index 3d588d1ae3..9e63cfd48a 100644
--- a/src/univ/slider.cpp
+++ b/src/univ/slider.cpp
@@ -213,17 +213,6 @@ bool wxSlider::ChangeValueTo(int value)
 
     Refresh();
 
-    // generate the events: both a specific scroll event and a command event
-    wxScrollEvent eventScroll(wxEVT_SCROLL_CHANGED, GetId());
-    eventScroll.SetPosition(m_value);
-    eventScroll.SetEventObject( this );
-    (void)GetEventHandler()->ProcessEvent(eventScroll);
-
-    wxCommandEvent event(wxEVT_SLIDER, GetId());
-    event.SetInt(m_value);
-    event.SetEventObject(this);
-    (void)GetEventHandler()->ProcessEvent(event);
-
     return true;
 }
 
@@ -782,27 +771,28 @@ bool wxSlider::PerformAction(const wxControlAction& action,
     }
     else if ( action == wxACTION_SLIDER_PAGE_CHANGE )
     {
+        scrollEvent = wxEVT_SCROLL_CHANGED;
         value = NormalizeValue(m_value + numArg * GetPageSize());
     }
     else if ( action == wxACTION_SLIDER_LINE_UP )
     {
         scrollEvent = wxEVT_SCROLL_LINEUP;
-        value = NormalizeValue(m_value + +GetLineSize());
+        value = NormalizeValue(m_value + -GetLineSize());
     }
     else if ( action == wxACTION_SLIDER_LINE_DOWN )
     {
         scrollEvent = wxEVT_SCROLL_LINEDOWN;
-        value = NormalizeValue(m_value + -GetLineSize());
+        value = NormalizeValue(m_value + +GetLineSize());
     }
     else if ( action == wxACTION_SLIDER_PAGE_UP )
     {
         scrollEvent = wxEVT_SCROLL_PAGEUP;
-        value = NormalizeValue(m_value + +GetPageSize());
+        value = NormalizeValue(m_value + -GetPageSize());
     }
     else if ( action == wxACTION_SLIDER_PAGE_DOWN )
     {
         scrollEvent = wxEVT_SCROLL_PAGEDOWN;
-        value = NormalizeValue(m_value + -GetPageSize());
+        value = NormalizeValue(m_value + +GetPageSize());
     }
     else if ( action == wxACTION_SLIDER_THUMB_DRAG ||
                 action == wxACTION_SLIDER_THUMB_MOVE )
@@ -826,12 +816,11 @@ bool wxSlider::PerformAction(const wxControlAction& action,
         return wxControl::PerformAction(action, numArg, strArg);
     }
 
-    // update wxSlider current value and generate wxCommandEvent, except while
-    // dragging the thumb
+    // update wxSlider current value
     if ( valueChanged )
         ChangeValueTo(value);
 
-    // also generate more precise wxScrollEvent if applicable
+    // generate wxScrollEvent
     if ( scrollEvent != wxEVT_NULL )
     {
         wxScrollEvent event(scrollEvent, GetId());