| | 1 | /////////////////////////////////////////////////////////////////////////////// |
| | 2 | // Name: 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 | |
| | 19 | struct IDataObject; |
| | 20 | |
| | 21 | // ---------------------------------------------------------------------------- |
| | 22 | // wxDataObject is a "smart" and polymorphic piece of data. |
| | 23 | // ---------------------------------------------------------------------------- |
| | 24 | |
| | 25 | class WXDLLEXPORT wxDataObject : public wxDataObjectBase |
| | 26 | { |
| | 27 | public: |
| | 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) _T("") |
| | 63 | #endif // Debug/!Debug |
| | 64 | // they need to be accessed from wxIDataObject, so made them public, |
| | 65 | // or wxIDataObject friend |
| | 66 | public: |
| | 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 | |
| | 73 | private: |
| | 74 | IDataObject *m_pIDataObject; // pointer to the COM interface |
| | 75 | |
| | 76 | DECLARE_NO_COPY_CLASS(wxDataObject) |
| | 77 | }; |
| | 78 | |
| | 79 | #endif //_WX_MSW_OLE_DATAOBJ_H |
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