documents.h

The source code samples for chapter 2, 4, 6, and 8 are contained in the EvenChapters project. Those

// Documents.h : Declaration of the CDocuments

#ifndef __DOCUMENTS_H_
#define __DOCUMENTS_H_

#include "resource.h"       // main symbols
#include "Document.h"

template <typename T>
struct _CopyVariantFromAdaptItf {
	static HRESULT copy(VARIANT* p1, CAdapt< CComPtr<T> >* p2) {
    HRESULT hr = p2->m_T->QueryInterface(IID_IDispatch, (void**)&p1->pdispVal);
    if( SUCCEEDED(hr) ) {
      p1->vt = VT_DISPATCH;
    }
    else {
      hr = p2->m_T->QueryInterface(IID_IUnknown, (void**)&p1->punkVal);
      if( SUCCEEDED(hr) ) {
        p1->vt = VT_UNKNOWN;
      }
    }

    return hr;
  }
	
  static void init(VARIANT* p)    { VariantInit(p); }
  static void destroy(VARIANT* p) { VariantClear(p); }
};

typedef CComEnumOnSTL<IEnumVARIANT, &IID_IEnumVARIANT, VARIANT,
                        _CopyVariantFromAdaptItf<IDocument>,
                        list< CAdapt< CComPtr<IDocument> > > >
        CComEnumVariantOnListOfDocuments;

template <typename T>
struct _CopyItfFromAdaptItf {
	static HRESULT copy(T** p1, CAdapt< CComPtr<T> >* p2) {
    if( *p1 = p2->m_T ) return (*p1)->AddRef(), S_OK;
    return E_POINTER;
  }
	
  static void init(T** p)    {}
  static void destroy(T** p) { if( *p ) (*p)->Release(); }
};

typedef ICollectionOnSTLImpl<IDispatchImpl<IDocuments, &IID_IDocuments>,
                             list< CAdapt< CComPtr<IDocument> > >,
                             IDocument*,
                             _CopyItfFromAdaptItf<IDocument>,
                             CComEnumVariantOnListOfDocuments>
        IDocumentsCollImpl;

/////////////////////////////////////////////////////////////////////////////
// CDocuments
class ATL_NO_VTABLE CDocuments : 
	public CComObjectRootEx<CComSingleThreadModel>,
	public CComCoClass<CDocuments>, // non-creatable
	public IDocumentsCollImpl
{
public:
DECLARE_NO_REGISTRY()
DECLARE_NOT_AGGREGATABLE(CDocuments)
DECLARE_PROTECT_FINAL_CONSTRUCT()

BEGIN_COM_MAP(CDocuments)
	COM_INTERFACE_ENTRY(IDocuments)
	COM_INTERFACE_ENTRY(IDispatch)
END_COM_MAP()

// IDocuments
public:
  STDMETHODIMP AddDocument(IDocument** ppDocument) {
    // Create a document to hand back to the client
    HRESULT hr = CDocument::CreateInstance(ppDocument);
    if( SUCCEEDED(hr) ) {
      // Put the document on the list
      CComPtr<IDocument>  spDoc = *ppDocument;
      m_coll.push_back(spDoc);
    }

	  return hr;
  }
};

#endif //__DOCUMENTS_H_