Merge wxQT branch into the trunk.

This merges in the latest sources from GSoC 2014 wxQt project with just a few
minor corrections, mostly undoing wrong changes to common files in that branch
(results of a previous bad merge?) and getting rid of whitespace-only changes.
Also remove debug logging from wxGrid.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77455 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/qt/dnd.cpp

@@ -0,0 +1,60 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        src/qt/dnd.cpp
+// Author:      Peter Most
+// Copyright:   (c) Peter Most
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#include "wx/dnd.h"
+
+wxDropTarget::wxDropTarget(wxDataObject *WXUNUSED(dataObject))
+{
+}
+
+bool wxDropTarget::OnDrop(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y))
+{
+    return false;
+}
+
+wxDragResult wxDropTarget::OnData(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxDragResult WXUNUSED(def))
+{
+    return wxDragResult();
+}
+
+bool wxDropTarget::GetData()
+{
+    return false;
+}
+
+wxDataFormat wxDropTarget::GetMatchingPair()
+{
+    wxFAIL_MSG("wxDropTarget::GetMatchingPair() not implemented in src/qt/dnd.cpp");
+    return wxDF_INVALID;
+}
+
+//##############################################################################
+
+
+wxDropSource::wxDropSource( wxWindow *WXUNUSED(win),
+              const wxIcon &WXUNUSED(copy),
+              const wxIcon &WXUNUSED(move),
+              const wxIcon &WXUNUSED(none))
+{
+}
+
+wxDropSource::wxDropSource( wxDataObject& WXUNUSED(data),
+              wxWindow *WXUNUSED(win),
+              const wxIcon &WXUNUSED(copy),
+              const wxIcon &WXUNUSED(move),
+              const wxIcon &WXUNUSED(none))
+{
+}
+
+wxDragResult wxDropSource::DoDragDrop(int WXUNUSED(flags))
+{
+    return wxDragResult();
+}
+