wxDataObejct and related changes (won't compile right now)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4089 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/ole/dataform.h

@@ -0,0 +1,68 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        msw/ole/dataform.h
+// Purpose:     declaration of the wxDataFormat class
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     19.10.99 (extracted from msw/ole/dataobj.h)
+// RCS-ID:      $Id$
+// Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef   _WX_MSW_OLE_DATAFORM_H
+#define   _WX_MSW_OLE_DATAFORM_H
+
+// ----------------------------------------------------------------------------
+// wxDataFormat identifies the single format of data
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxDataFormat
+{
+public:
+    // the clipboard formats under Win32 are UINTs
+    typedef unsigned int NativeFormat;
+
+    wxDataFormat(NativeFormat format = wxDF_INVALID) { m_format = format; }
+    wxDataFormat(const wxChar *format) { SetId(format); }
+
+    wxDataFormat& operator=(NativeFormat format)
+        { m_format = format; return *this; }
+    wxDataFormat& operator=(const wxDataFormat& format)
+        { m_format = format.m_format; return *this; }
+
+    // default copy ctor/assignment operators ok
+
+    // comparison (must have both versions)
+    bool operator==(wxDataFormatId format) const
+        { return m_format == (NativeFormat)format; }
+    bool operator!=(wxDataFormatId format) const
+        { return m_format != (NativeFormat)format; }
+    bool operator==(const wxDataFormat& format) const
+        { return m_format == format.m_format; }
+    bool operator!=(const wxDataFormat& format) const
+        { return m_format != format.m_format; }
+
+    // explicit and implicit conversions to NativeFormat which is one of
+    // standard data types (implicit conversion is useful for preserving the
+    // compatibility with old code)
+    NativeFormat GetFormatId() const { return m_format; }
+    operator NativeFormat() const { return m_format; }
+
+    // this only works with standard ids
+    void SetType(wxDataFormatId format) { m_format = format; }
+    wxDataFormatId GetType() const { return m_format; }
+
+    // string ids are used for custom types - this SetId() must be used for
+    // application-specific formats
+    wxString GetId() const;
+    void SetId(const wxChar *format);
+
+private:
+    // returns TRUE if the format is one of those defined in wxDataFormatId
+    bool IsStandard() const { return m_format > 0 && m_format < wxDF_MAX; }
+
+    NativeFormat m_format;
+};
+
+#endif //  _WX_MSW_OLE_DATAFORM_H
+