150 lines
4.2 KiB
C++
150 lines
4.2 KiB
C++
//+--------------------------------------------------------------------------
|
|
//
|
|
// Microsoft Windows
|
|
// Copyright (C) Microsoft Corporation, 1994 - 1998.
|
|
//
|
|
// File: dataobj.cpp
|
|
//
|
|
// Contents: implementation of IDataObject
|
|
//
|
|
// Classes: CDataObject
|
|
//
|
|
// History: 03-17-1998 stevebl Created
|
|
//
|
|
//---------------------------------------------------------------------------
|
|
|
|
#include "precomp.hxx"
|
|
|
|
#ifdef _DEBUG
|
|
#define new DEBUG_NEW
|
|
#undef THIS_FILE
|
|
static char THIS_FILE[] = __FILE__;
|
|
#endif
|
|
|
|
unsigned int CDataObject::m_cfNodeType = RegisterClipboardFormat(CCF_NODETYPE);
|
|
unsigned int CDataObject::m_cfNodeTypeString = RegisterClipboardFormat(CCF_SZNODETYPE);
|
|
unsigned int CDataObject::m_cfDisplayName = RegisterClipboardFormat(CCF_DISPLAY_NAME);
|
|
unsigned int CDataObject::m_cfCoClass = RegisterClipboardFormat(CCF_SNAPIN_CLASSID);
|
|
unsigned int CDataObject::m_cfInternal = RegisterClipboardFormat(SNAPIN_INTERNAL);
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// CDataObject implementations
|
|
|
|
|
|
STDMETHODIMP CDataObject::GetDataHere(LPFORMATETC lpFormatetc, LPSTGMEDIUM lpMedium)
|
|
{
|
|
HRESULT hr = DV_E_CLIPFORMAT;
|
|
|
|
AFX_MANAGE_STATE(AfxGetStaticModuleState());
|
|
|
|
// Based on the CLIPFORMAT write data to the stream
|
|
const CLIPFORMAT cf = lpFormatetc->cfFormat;
|
|
|
|
if(cf == m_cfNodeType)
|
|
{
|
|
hr = CreateNodeTypeData(lpMedium);
|
|
}
|
|
else if(cf == m_cfNodeTypeString)
|
|
{
|
|
hr = CreateNodeTypeStringData(lpMedium);
|
|
}
|
|
else if (cf == m_cfDisplayName)
|
|
{
|
|
hr = CreateDisplayName(lpMedium);
|
|
}
|
|
else if (cf == m_cfCoClass)
|
|
{
|
|
hr = CreateCoClassID(lpMedium);
|
|
}
|
|
else if (cf == m_cfInternal)
|
|
{
|
|
hr = CreateInternal(lpMedium);
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
// Note - Sample does not implement these
|
|
STDMETHODIMP CDataObject::GetData(LPFORMATETC lpFormatetcIn, LPSTGMEDIUM lpMedium)
|
|
{
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
|
|
STDMETHODIMP CDataObject::EnumFormatEtc(DWORD dwDirection, LPENUMFORMATETC* ppEnumFormatEtc)
|
|
{
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// CDataObject creation members
|
|
|
|
HRESULT CDataObject::Create(const void* pBuffer, int len, LPSTGMEDIUM lpMedium)
|
|
{
|
|
HRESULT hr = DV_E_TYMED;
|
|
|
|
// Do some simple validation
|
|
if (pBuffer == NULL || lpMedium == NULL)
|
|
return E_POINTER;
|
|
|
|
// Make sure the type medium is HGLOBAL
|
|
if (lpMedium->tymed == TYMED_HGLOBAL)
|
|
{
|
|
// Create the stream on the hGlobal passed in
|
|
LPSTREAM lpStream;
|
|
hr = CreateStreamOnHGlobal(lpMedium->hGlobal, FALSE, &lpStream);
|
|
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
// Write to the stream the number of bytes
|
|
unsigned long written;
|
|
hr = lpStream->Write(pBuffer, len, &written);
|
|
|
|
// Because we told CreateStreamOnHGlobal with 'FALSE',
|
|
// only the stream is released here.
|
|
// Note - the caller (i.e. snap-in, object) will free the HGLOBAL
|
|
// at the correct time. This is according to the IDataObject specification.
|
|
lpStream->Release();
|
|
}
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
HRESULT CDataObject::CreateNodeTypeData(LPSTGMEDIUM lpMedium)
|
|
{
|
|
// Create the node type object in GUID format
|
|
return Create(reinterpret_cast<const void*>(&cNodeType), sizeof(GUID), lpMedium);
|
|
}
|
|
|
|
HRESULT CDataObject::CreateNodeTypeStringData(LPSTGMEDIUM lpMedium)
|
|
{
|
|
// Create the node type object in GUID string format
|
|
return Create(cszNodeType, ((wcslen(cszNodeType)+1) * sizeof(wchar_t)), lpMedium);
|
|
}
|
|
|
|
HRESULT CDataObject::CreateDisplayName(LPSTGMEDIUM lpMedium)
|
|
{
|
|
// This is the display named used in the scope pane and snap-in manager
|
|
|
|
// Load the name from resource
|
|
// Note - if this is not provided, the console will used the snap-in name
|
|
|
|
CString szDispName;
|
|
szDispName.LoadString(IDS_NODENAME);
|
|
|
|
return Create(szDispName, ((szDispName.GetLength()+1) * sizeof(wchar_t)), lpMedium);
|
|
}
|
|
|
|
HRESULT CDataObject::CreateCoClassID(LPSTGMEDIUM lpMedium)
|
|
{
|
|
// Create the CoClass information
|
|
return Create((LPVOID)&CLSID_Snapin, sizeof(CLSID), lpMedium);
|
|
}
|
|
|
|
HRESULT CDataObject::CreateInternal(LPSTGMEDIUM lpMedium)
|
|
{
|
|
|
|
return Create(&m_internal, sizeof(INTERNAL), lpMedium);
|
|
}
|