Added fix to send scroll messages from mouse wheel instead of scrolling directly

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11191 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/scrlwing.cpp

@@ -978,9 +978,24 @@ void wxScrollHelper::HandleOnMouseWheel(wxMouseEvent& event)
     {
         lines *= event.GetLinesPerAction();
 
-        int vsx, vsy;
+        wxScrollWinEvent newEvent;
-        GetViewStart(&vsx, &vsy);
+
-        Scroll(-1, vsy - lines);
+        newEvent.SetPosition(m_xScrollPosition - lines);
+        newEvent.SetOrientation(wxVERTICAL);
+        newEvent.m_eventObject = m_win;
+        if (lines > 0)
+            newEvent.m_eventType = wxEVT_SCROLLWIN_LINEUP;
+        else
+            newEvent.m_eventType = wxEVT_SCROLLWIN_LINEDOWN;
+
+        int times = abs(lines);
+        for (; times > 0; times --)
+            m_win->GetEventHandler()->ProcessEvent(newEvent);
+
+        /* Old Way */
+        // int vsx, vsy;
+        // GetViewStart(&vsx, &vsy);
+        // Scroll(-1, vsy - lines);    
     }
 }