movies.h

ATL开发指南PDF格式

// 
// Movies.h
//

#include <vector>

class ATL_NO_VTABLE CMovie :
   public IDispatchImpl<IMovie, &IID_IMovie, &LIBID_CHAPTER9_COLLECTIONSERVERLib>,
   public CComObjectRoot
{
public:
   CMovie() {}; 

BEGIN_COM_MAP(CMovie)
   COM_INTERFACE_ENTRY(IDispatch)
   COM_INTERFACE_ENTRY(IMovie)
END_COM_MAP() 

DECLARE_NOT_AGGREGATABLE(CMovie) 

// IMovie
public:
   STDMETHOD(get_Title)(BSTR *pVal);
   STDMETHOD(put_Title)(BSTR newVal);
   STDMETHOD(get_Director)( BSTR* );
   STDMETHOD(put_Director)( BSTR ); 

private:
   CComBSTR m_bstrDirector;
   CComBSTR m_bstrTitle;
}; 

   //
// CMovieCollection
//
class ATL_NO_VTABLE CMovieCollection :
   public IDispatchImpl<IMovieCollection, &IID_IMovieCollection,
                        &LIBID_CHAPTER9_COLLECTIONSERVERLib>,
   public CComObjectRoot
{
public:
   CMovieCollection() {};

BEGIN_COM_MAP(CMovieCollection)
   COM_INTERFACE_ENTRY(IDispatch)
   COM_INTERFACE_ENTRY(IMovieCollection)
END_COM_MAP()

DECLARE_NOT_AGGREGATABLE(CMovieCollection)

public:
   STDMETHODIMP RemoveAll()
   {
      m_vecMovies.erase( m_vecMovies.begin(),
                         m_vecMovies.end() );
      return S_OK;
   }
   STDMETHODIMP Add(IMovie* pMovie )
   {
      // Add the variant (dispatch) to the collection
      m_vecMovies.push_back(CComVariant( pMovie ));
      return S_OK;
   }
   STDMETHODIMP Remove(long lIndex )
   {
      // Make sure the index is within range (index is 1-based)
      if (lIndex < 1 || lIndex > m_vecMovies.size())
         return E_INVALIDARG;

      m_vecMovies.erase( m_vecMovies.begin() + lIndex - 1 );

      return S_OK;
   }

   STDMETHODIMP get_Count(long* plCount)
   {
      *plCount = m_vecMovies.size();
      return S_OK;
   }

   STDMETHODIMP get_Item(long lItem, IMovie** ppIMovie )
   {
      if ( lItem < 1 || lItem > m_vecMovies.size())
         return E_INVALIDARG;

      // Get the item
      CComVariant& var = m_vecMovies[lItem - 1];

      HRESULT hr = var.pdispVal->QueryInterface( IID_IMovie,
                                    (void**) ppIMovie );
      if (FAILED( hr ))
         return E_UNEXPECTED;

      return S_OK;
   }
   STDMETHODIMP get__NewEnum(IUnknown** ppUnk)
   {
      typedef CComObject<CComEnum<IEnumVARIANT, &IID_IEnumVARIANT,
                                  VARIANT, _Copy<VARIANT> > > 
                                                       enumVariant;

      enumVariant* pEnum = new enumVariant;

      HRESULT hr = pEnum->Init( m_vecMovies.begin(),
                               m_vecMovies.end(),
                               0,
                               AtlFlagCopy );
      if (SUCCEEDED( hr ))
         hr = pEnum->QueryInterface( IID_IEnumVARIANT,
                                     (void**) ppUnk );

      if (FAILED( hr ))
         delete pEnum;

      return S_OK;
   }

private:
   std::vector<CComVariant> m_vecMovies;
};