home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Tricks of the Windows Gam…ming Gurus (2nd Edition)
/
Disc2.iso
/
msdn_vcb
/
samples
/
vc98
/
sdk
/
com
/
inole2
/
chap21
/
cosmo
/
iperfile.cpp
< prev
next >
Wrap
C/C++ Source or Header
|
1995-05-03
|
6KB
|
279 lines
/*
* IPERFILE.CPP
* Cosmo Chapter 21
*
* Implementation of the IPersistFile interface for Cosmo
*
* Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
*
* Kraig Brockschmidt, Microsoft
* Internet : kraigb@microsoft.com
* Compuserve: >INTERNET:kraigb@microsoft.com
*/
#include "cosmo.h"
/*
* CImpIPersistFile:CImpIPersistFile
* CImpIPersistFile::~CImpIPersistFile
*
* Constructor Parameters:
* pObj PCFigure associated with this object.
* pUnkOuter LPUNKNOWN of the controlling unknown.
*/
CImpIPersistFile::CImpIPersistFile(PCFigure pObj
, LPUNKNOWN pUnkOuter)
{
m_cRef=0;
m_pObj=pObj;
m_pUnkOuter=pUnkOuter;
return;
}
CImpIPersistFile::~CImpIPersistFile(void)
{
return;
}
/*
* CImpIPersistFile::QueryInterface
* CImpIPersistFile::AddRef
* CImpIPersistFile::Release
*/
STDMETHODIMP CImpIPersistFile::QueryInterface(REFIID riid
, PPVOID ppv)
{
return m_pUnkOuter->QueryInterface(riid, ppv);
}
STDMETHODIMP_(ULONG) CImpIPersistFile::AddRef(void)
{
++m_cRef;
return m_pUnkOuter->AddRef();
}
STDMETHODIMP_(ULONG) CImpIPersistFile::Release(void)
{
--m_cRef;
return m_pUnkOuter->Release();
}
/*
* CImpIPersistFile::GetClassID
*
* Purpose:
* Returns the CLSID of the file represented by this interface.
*
* Parameters:
* pClsID LPCLSID in which to store our CLSID.
*
* Return Value:
* HRESULT NOERROR or a general error value.
*/
STDMETHODIMP CImpIPersistFile::GetClassID(LPCLSID pClsID)
{
*pClsID=CLSID_CosmoFigure;
return NOERROR;
}
/*
* CImpIPersistFile::IsDirty
*
* Purpose:
* Tells the caller if we have made changes to this file since
* it was loaded or initialized new.
*
* Parameters:
* None
*
* Return Value:
* HRESULT Contains S_OK if we ARE dirty, S_FALSE if
* NOT dirty.
*/
STDMETHODIMP CImpIPersistFile::IsDirty(void)
{
return ResultFromScode(m_pObj->FIsDirty() ? S_OK : S_FALSE);
}
/*
* IPersistFile::Load
*
* Purpose:
* Asks the server to load the document for the given filename.
*
* Parameters:
* pszFile LPCOLESTR to the filename to load.
* grfMode DWORD containing open flags requested from the
* caller. Currently these are safely ignored.
*
* Return Value:
* HRESULT NOERROR or a general error value.
*/
STDMETHODIMP CImpIPersistFile::Load(LPCOLESTR pszFile, DWORD grfMode)
{
UINT uRet;
#ifdef WIN32ANSI
TCHAR szTemp[CCHPATHMAX];
WideCharToMultiByte(CP_ACP, 0, pszFile, -1, szTemp, CCHPATHMAX
, NULL, NULL);
uRet=m_pObj->m_pDoc->Load(TRUE, (LPTSTR)szTemp);
#else
uRet=m_pObj->m_pDoc->Load(TRUE, (LPTSTR)pszFile);
#endif
return (DOCERR_NONE==uRet) ? NOERROR
: ResultFromScode(STG_E_READFAULT);
}
/*
* IPersistFile::Save
*
* Purpose:
* Purpose:
* Instructs the server to write the current file into a new
* filename, possibly then using that filename as the current one.
*
* Parameters:
* pszFile LPCOLESTR of the file into which we save. If NULL,
* this means save the current file.
* fRemember BOOL indicating if we're to use this filename as
* the current file now (Save As instead of Save
* Copy As).
*
* Return Value:
* HRESULT NOERROR or a general error value.
*/
STDMETHODIMP CImpIPersistFile::Save(LPCOLESTR pszFile, BOOL fRemember)
{
UINT uRet;
BOOL fTemp;
/*
* We set CFigure::m_fEmbedding here to TRUE if we don't want to
* remember this file, as that cons Save into ignoring this
* filename. This is not something you have to do in your own
* code the same way, but be sure to pay attention to fRemember.
*/
fTemp=m_pObj->m_fEmbedded;
m_pObj->m_fEmbedded=!fRemember;
#ifdef WIN32ANSI
char szTemp[CCHPATHMAX];
WideCharToMultiByte(CP_ACP, 0, pszFile, -1, szTemp, CCHPATHMAX
, NULL, NULL);
uRet=m_pObj->m_pDoc->Save(0, szTemp);
#else
uRet=m_pObj->m_pDoc->Save(0, (LPTSTR)pszFile);
#endif
m_pObj->m_fEmbedded=fTemp;
return (DOCERR_NONE==uRet) ? NOERROR
: ResultFromScode(STG_E_WRITEFAULT);
}
/*
* IPersistFile::SaveCompleted
*
* Purpose:
* Informs us that the operation that called Save is now finished
* and we can access the file again.
*
* Parameters:
* pszFile LPCOLESTR of the file in which we can start
* writing again.
*
* Return Value:
* HRESULT NOERROR or a general error value.
*/
STDMETHODIMP CImpIPersistFile::SaveCompleted(LPCOLESTR pszFile)
{
return NOERROR;
}
/*
* IPersistFile::GetCurFile
*
* Purpose:
* Retrieves the name of the current file.
*
* Parameters:
* ppszFile LPOLESTR * into which we store a pointer to
* the filename that should be allocated with the
* shared IMalloc.
*
* Return Value:
* HRESULT NOERROR or a general error value.
*/
STDMETHODIMP CImpIPersistFile::GetCurFile(LPOLESTR *ppszFile)
{
LPMALLOC pIMalloc;
LPOLESTR psz;
UINT uRet;
*ppszFile=NULL;
if (FAILED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
return ResultFromScode(E_FAIL);
psz=(LPOLESTR)pIMalloc->Alloc(CCHPATHMAX*sizeof(OLECHAR));
pIMalloc->Release();
#ifdef WIN32ANSI
char szTemp[CCHPATHMAX];
uRet=m_pObj->m_pDoc->FilenameGet(szTemp, CCHPATHMAX);
MultiByteToWideChar(CP_ACP, 0, szTemp, -1, psz, CCHPATHMAX);
#else
uRet=m_pObj->m_pDoc->FilenameGet(psz, CCHPATHMAX);
#endif
//If we have no filename, return the prompt for File Open/Save.
if (0==uRet)
#ifdef WIN32ANSI
MultiByteToWideChar(CP_ACP, 0
, (*m_pObj->m_pST)[IDS_EXTENSION], -1, psz, CCHPATHMAX);
#else
lstrcpy(psz, (*m_pObj->m_pST)[IDS_EXTENSION]);
#endif
*ppszFile=psz;
return (0==uRet) ? ResultFromScode(S_FALSE) : NOERROR;
}