void CColorButtonCtrl::DoPropExchange(CPropExchange* pPX)
{
ExchangeVersion(pPX, MAKELONG(_wVerMinor, _wVerMajor));
COleControl::DoPropExchange(pPX);
// Call PX_ functions for each persistent custom property.
PX_Short(pPX, _T("BevelWidth"), m_BevelWidth, 2);
PX_Color(pPX, _T("BackColor"), m_BackColor, ::GetSysColor(COLOR_BTNFACE));
PX_Color(pPX, _T("ForeColor"), m_ForeColor, ::GetSysColor(COLOR_BTNTEXT));
PX_String(pPX, _T("Caption"), m_sCaption, AmbientDisplayName());
}
BOOL COleControl::GetPropsetData(LPFORMATETC lpFormatEtc,
LPSTGMEDIUM lpStgMedium, REFCLSID fmtid)
{
ASSERT_VALID(this);
ASSERT(AfxIsValidAddress(lpFormatEtc, sizeof(FORMATETC), FALSE));
ASSERT(AfxIsValidAddress(lpStgMedium, sizeof(STGMEDIUM)));
BOOL bGetDataHere = (lpStgMedium->tymed != TYMED_NULL);
// Allow IStream or IStorage as the storage medium.
if (!(lpFormatEtc->tymed & (TYMED_ISTREAM|TYMED_ISTORAGE)))
{
TRACE0("Propset only supported for stream or storage.\n");
return FALSE;
}
LPSTORAGE lpStorage = NULL;
LPSTREAM lpStream = NULL;
if (lpFormatEtc->tymed & TYMED_ISTORAGE)
{
// Caller wants propset data in a storage object.
if (bGetDataHere)
{
// Use the caller-supplied storage object.
lpStorage = lpStgMedium->pstg;
}
else
{
// Create a storage object on a memory ILockBytes implementation.
LPLOCKBYTES lpLockBytes = NULL;
if (FAILED(CreateILockBytesOnHGlobal(NULL, TRUE, &lpLockBytes)))
{
TRACE0("CreateILockBytesOnHGlobal failed.\n");
return FALSE;
}
ASSERT_POINTER(lpLockBytes, ILockBytes);
if (FAILED(StgCreateDocfileOnILockBytes(lpLockBytes,
STGM_SHARE_EXCLUSIVE|STGM_CREATE|STGM_READWRITE, 0,
&lpStorage)))
{
TRACE0("StgCreateDocfileOnILockBytes failed.\n");
lpLockBytes->Release();
return FALSE;
}
// Docfile now has reference to ILockBytes, so release ours.
lpLockBytes->Release();
}
ASSERT_POINTER(lpStorage, IStorage);
// Create a stream within the storage.
if (FAILED(lpStorage->CreateStream(OLESTR("Contents"),
STGM_SHARE_EXCLUSIVE|STGM_CREATE|STGM_READWRITE, 0, 0,
&lpStream)))
{
TRACE0("IStorage::CreateStream failed.\n");
if (!bGetDataHere)
lpStorage->Release();
return FALSE;
}
}
else
{
// Caller wants propset data in a stream object.
if (bGetDataHere)
{
// Use the caller-supplied stream object
lpStream = lpStgMedium->pstm;
}
else
{
lpStream = _AfxCreateMemoryStream();
if (lpStream == NULL)
return FALSE;
}
}
ASSERT_POINTER(lpStream, IStream);
// Create the property set.
CLSID clsid;
GetClassID(&clsid);
CPropertySet pset(clsid);
pset.SetOSVersion(MAKELONG(LOWORD(GetVersion()), OSTYPE));
CPropertySection* ppsec = pset.AddSection(fmtid);
if (ppsec == NULL)
{
TRACE0("CPropertySet::AddSection failed.\n");
lpStream->Release();
lpStorage->Release();
return FALSE;
}
// Set the name, based on the ambient display name (from the container).
ppsec->SetSectionName(AmbientDisplayName());
CPropsetPropExchange propx(*ppsec, lpStorage, FALSE);
BOOL bPropExchange = FALSE;
TRY
{
DoPropExchange(&propx);
bPropExchange = TRUE;
}
END_TRY
if (!bPropExchange)
{
TRACE0("DoPropExchange failed.\n");
lpStream->Release();
lpStorage->Release();
return FALSE;
}
// Store the property set in the stream.
if (FAILED(pset.WriteToStream(lpStream)))
{
TRACE0("CPropertySet::WriteToStream failed.\n");
lpStream->Release();
lpStorage->Release();
return FALSE;
}
// Return the property set in the requested medium.
if (lpFormatEtc->tymed & TYMED_ISTORAGE)
{
// Return as a storage object.
ASSERT_POINTER(lpStorage, IStorage);
lpStream->Release();
lpStgMedium->pstg = lpStorage;
lpStgMedium->tymed = TYMED_ISTORAGE;
lpStgMedium->pUnkForRelease = NULL;
}
else
{
// Return as a stream.
ASSERT_POINTER(lpStream, IStream);
lpStgMedium->pstm = lpStream;
lpStgMedium->tymed = TYMED_ISTREAM;
lpStgMedium->pUnkForRelease = NULL;
}
return TRUE;
}