dtrans/source/win32/workbench/XTDo.hxx

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  30
  31
  32 #ifndef _XTDATAOBJECT_HXX_
  33 #define _XTDATAOBJECT_HXX_
  34
  35
  36 //------------------------------------------------------------------------
  37 // includes
  38 //------------------------------------------------------------------------
  39
  40 #if defined _MSC_VER
  41 #pragma warning(push,1)
  42 #endif
  43 #include <windows.h>
  44 #include <ole2.h>
  45 #include <objidl.h>
  46 #if defined _MSC_VER
  47 #pragma warning(pop)
  48 #endif
  49
  50 #include <vector>
  51
  52 // forward declaration
  53 //class CWinClipbImpl;
  54 class EnumFormatEtc;
  55
  56 /*--------------------------------------------------------------------------
  57     - the function principle of the windows clipboard:
  58       a data provider offers all formats he can deliver on the clipboard
  59       a clipboard client ask for the available formats on the clipboard
  60       and decides if there is a format he can use
  61       if there is one, he requests the data in this format
  62
  63     - This class inherits from IDataObject an so can be placed on the
  64       OleClipboard. The class wrapps a transferable object which is the
  65       original DataSource
  66     - DataFlavors offerd by this transferable will be translated into
  67       appropriate clipboard formats
  68     - if the transferable contains text data always text and unicodetext
  69       will be offered or vice versa
  70     - text data will be automaticaly converted between text und unicode text
  71     - although the transferable may support text in different charsets
  72       (codepages) only text in one codepage can be offered by the clipboard
  73
  74 ----------------------------------------------------------------------------*/
  75
  76 class CXTDataObject : public IDataObject
  77 {
  78 public:
  79     CXTDataObject( );
  80
  81     //-----------------------------------------------------------------
  82     // ole interface implementation
  83     //-----------------------------------------------------------------
  84
  85     //IUnknown interface methods
  86     STDMETHODIMP           QueryInterface(REFIID iid, LPVOID* ppvObject);
  87     STDMETHODIMP_( ULONG ) AddRef( );
  88     STDMETHODIMP_( ULONG ) Release( );
  89
  90     // IDataObject interface methods
  91     STDMETHODIMP GetData( LPFORMATETC pFormatetc, LPSTGMEDIUM pmedium );
  92     STDMETHODIMP GetDataHere( LPFORMATETC pFormatetc, LPSTGMEDIUM pmedium );
  93     STDMETHODIMP QueryGetData( LPFORMATETC pFormatetc );
  94     STDMETHODIMP GetCanonicalFormatEtc( LPFORMATETC pFormatectIn, LPFORMATETC pFormatetcOut );
  95     STDMETHODIMP SetData( LPFORMATETC pFormatetc, LPSTGMEDIUM pmedium, BOOL fRelease );
  96     STDMETHODIMP EnumFormatEtc( DWORD dwDirection, IEnumFORMATETC** ppenumFormatetc );
  97     STDMETHODIMP DAdvise( LPFORMATETC pFormatetc, DWORD advf, LPADVISESINK pAdvSink, DWORD* pdwConnection );
  98     STDMETHODIMP DUnadvise( DWORD dwConnection );
  99     STDMETHODIMP EnumDAdvise( LPENUMSTATDATA* ppenumAdvise );
 100
 101     operator IDataObject*( );
 102
 103 private:
 104
 105 private:
 106     LONG m_nRefCnt;
 107 };
 108
 109 //------------------------------------------------------------------------
 110 //
 111 //------------------------------------------------------------------------
 112
 113 class CEnumFormatEtc : public IEnumFORMATETC
 114 {
 115 public:
 116     CEnumFormatEtc( LPUNKNOWN pUnkDataObj );
 117
 118     // IUnknown
 119     STDMETHODIMP           QueryInterface( REFIID iid, LPVOID* ppvObject );
 120     STDMETHODIMP_( ULONG ) AddRef( );
 121     STDMETHODIMP_( ULONG ) Release( );
 122
 123     //IEnumFORMATETC
 124     STDMETHODIMP Next( ULONG celt, LPFORMATETC rgelt, ULONG* pceltFetched );
 125     STDMETHODIMP Skip( ULONG celt );
 126     STDMETHODIMP Reset( );
 127     STDMETHODIMP Clone( IEnumFORMATETC** ppenum );
 128
 129 private:
 130     LONG                                                                m_nRefCnt;
 131     LPUNKNOWN                                                   m_pUnkDataObj;
 132     ULONG                                                               m_nCurrPos;
 133 };
 134
 135 typedef CEnumFormatEtc *PCEnumFormatEtc;
 136
 137 #endif