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1///////////////////////////////////////////////////////////////////////////////
2// Name: wx/msw/ole/dataobj.h
3// Purpose: declaration of the wxDataObject class
4// Author: Vadim Zeitlin
5// Modified by:
6// Created: 10.05.98
7// RCS-ID: $Id$
8// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
9// Licence: wxWindows licence
10///////////////////////////////////////////////////////////////////////////////
11
12#ifndef _WX_MSW_OLE_DATAOBJ_H
13#define _WX_MSW_OLE_DATAOBJ_H
14
15// ----------------------------------------------------------------------------
16// forward declarations
17// ----------------------------------------------------------------------------
18
19struct IDataObject;
20
21// ----------------------------------------------------------------------------
22// wxDataObject is a "smart" and polymorphic piece of data.
23// ----------------------------------------------------------------------------
24
25class WXDLLIMPEXP_CORE wxDataObject : public wxDataObjectBase
26{
27public:
28 // ctor & dtor
29 wxDataObject();
30 virtual ~wxDataObject();
31
32 // retrieve IDataObject interface (for other OLE related classes)
33 IDataObject *GetInterface() const { return m_pIDataObject; }
34
35 // tell the object that it should be now owned by IDataObject - i.e. when
36 // it is deleted, it should delete us as well
37 void SetAutoDelete();
38
39 // return true if we support this format in "Get" direction
40 bool IsSupportedFormat(const wxDataFormat& format) const
41 { return wxDataObjectBase::IsSupported(format, Get); }
42
43 // if this method returns false, this wxDataObject will be copied to
44 // the clipboard with its size prepended to it, which is compatible with
45 // older wx versions
46 //
47 // if returns true, then this wxDataObject will be copied to the clipboard
48 // without any additional information and ::HeapSize() function will be used
49 // to get the size of that data
50 virtual bool NeedsVerbatimData(const wxDataFormat& WXUNUSED(format)) const
51 {
52 // return false from here only for compatibility with earlier wx versions
53 return true;
54 }
55
56 // function to return symbolic name of clipboard format (for debug messages)
57#ifdef __WXDEBUG__
58 static const wxChar *GetFormatName(wxDataFormat format);
59
60 #define wxGetFormatName(format) wxDataObject::GetFormatName(format)
61#else // !Debug
62 #define wxGetFormatName(format) wxT("")
63#endif // Debug/!Debug
64 // they need to be accessed from wxIDataObject, so made them public,
65 // or wxIDataObject friend
66public:
67 virtual const void* GetSizeFromBuffer( const void* buffer, size_t* size,
68 const wxDataFormat& format );
69 virtual void* SetSizeInBuffer( void* buffer, size_t size,
70 const wxDataFormat& format );
71 virtual size_t GetBufferOffset( const wxDataFormat& format );
72
73private:
74 IDataObject *m_pIDataObject; // pointer to the COM interface
75
76 wxDECLARE_NO_COPY_CLASS(wxDataObject);
77};
78
79#endif //_WX_MSW_OLE_DATAOBJ_H