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

include/wx/qt/dataobj.h

@@ -0,0 +1,30 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        src/qt/dataobj.cpp
+// Author:      Peter Most
+// Copyright:   (c) Peter Most
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_QT_DATAOBJ_H_
+#define _WX_QT_DATAOBJ_H_
+
+#include <QMimeData>
+
+class WXDLLIMPEXP_CORE wxDataObject : public wxDataObjectBase
+{
+public:
+    wxDataObject() {}
+    
+    virtual bool IsSupportedFormat(const wxDataFormat& format, Direction dir) const;
+    virtual wxDataFormat GetPreferredFormat(Direction dir = Get) const;
+    virtual size_t GetFormatCount(Direction dir = Get) const;
+    virtual void GetAllFormats(wxDataFormat *formats, Direction dir = Get) const;
+    virtual size_t GetDataSize(const wxDataFormat& format) const;
+    virtual bool GetDataHere(const wxDataFormat& format, void *buf) const;
+    virtual bool SetData(const wxDataFormat& format, size_t len, const void * buf);
+
+private:
+    QMimeData m_qtMimeData; // to handle formats that have no helper classes
+};
+
+#endif // _WX_QT_DATAOBJ_H_