Tricks of the Windows Gam…ming Gurus (2nd Edition)/Disc2.iso/vc98/mfc/src/ctlpstm.cpp

C/C++ Source or Header | 1998-06-16 | 5.4 KB | 212 lines

// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"

#ifdef AFXCTL_PROP_SEG
#pragma code_seg(AFXCTL_PROP_SEG)
#endif

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#define new DEBUG_NEW

/////////////////////////////////////////////////////////////////////////////
// COleControl::XPersistStreamInit

STDMETHODIMP_(ULONG) COleControl::XPersistStreamInit::AddRef()
{
    METHOD_PROLOGUE_EX_(COleControl, PersistStreamInit)
    return (ULONG)pThis->ExternalAddRef();
}

STDMETHODIMP_(ULONG) COleControl::XPersistStreamInit::Release()
{
    METHOD_PROLOGUE_EX_(COleControl, PersistStreamInit)
    return (ULONG)pThis->ExternalRelease();
}

STDMETHODIMP COleControl::XPersistStreamInit::QueryInterface(
    REFIID iid, LPVOID* ppvObj)
{
    METHOD_PROLOGUE_EX_(COleControl, PersistStreamInit)
    return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj);
}

STDMETHODIMP COleControl::XPersistStreamInit::GetClassID(LPCLSID lpClassID)
{
    METHOD_PROLOGUE_EX_(COleControl, PersistStreamInit)
    return pThis->GetClassID(lpClassID);
}

STDMETHODIMP COleControl::XPersistStreamInit::IsDirty()
{
    METHOD_PROLOGUE_EX_(COleControl, PersistStreamInit)
    return pThis->m_bModified ? S_OK : S_FALSE;
}

STDMETHODIMP COleControl::XPersistStreamInit::Load(LPSTREAM pStm)
{
    METHOD_PROLOGUE_EX(COleControl, PersistStreamInit)
    return pThis->LoadState(pStm);
}

STDMETHODIMP COleControl::XPersistStreamInit::Save(LPSTREAM pStm,
    BOOL fClearDirty)
{
    METHOD_PROLOGUE_EX(COleControl, PersistStreamInit)

    // Delegate to SaveState.
    HRESULT hr = pThis->SaveState(pStm);

    // Bookkeeping:  Clear the dirty flag, if requested.
    if (fClearDirty)
        pThis->m_bModified = FALSE;

    return hr;
}

STDMETHODIMP COleControl::XPersistStreamInit::GetSizeMax(ULARGE_INTEGER*)
{
    return E_NOTIMPL;
}

STDMETHODIMP COleControl::XPersistStreamInit::InitNew()
{
    METHOD_PROLOGUE_EX(COleControl, PersistStreamInit)

    // Delegate to OnResetState.
    pThis->OnResetState();

    // Unless IOleObject::SetClientSite is called after this, we can
    // count on ambient properties being available while loading.
    pThis->m_bCountOnAmbients = TRUE;

    // Properties have been initialized
    pThis->m_bInitialized = TRUE;

    // Uncache cached ambient properties
    _afxAmbientCache->Cache(NULL);

    return S_OK;
}

/////////////////////////////////////////////////////////////////////////////
// COleControl::XPersistMemory

STDMETHODIMP_(ULONG) COleControl::XPersistMemory::AddRef()
{
    METHOD_PROLOGUE_EX_(COleControl, PersistMemory)
    return (ULONG)pThis->ExternalAddRef();
}

STDMETHODIMP_(ULONG) COleControl::XPersistMemory::Release()
{
    METHOD_PROLOGUE_EX_(COleControl, PersistMemory)
    return (ULONG)pThis->ExternalRelease();
}

STDMETHODIMP COleControl::XPersistMemory::QueryInterface(
    REFIID iid, LPVOID* ppvObj)
{
    METHOD_PROLOGUE_EX_(COleControl, PersistMemory)
    return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj);
}

STDMETHODIMP COleControl::XPersistMemory::GetClassID(LPCLSID lpClassID)
{
    METHOD_PROLOGUE_EX_(COleControl, PersistMemory)
    return pThis->GetClassID(lpClassID);
}

STDMETHODIMP COleControl::XPersistMemory::IsDirty()
{
    METHOD_PROLOGUE_EX_(COleControl, PersistMemory)
    return pThis->m_bModified ? S_OK : S_FALSE;
}

STDMETHODIMP COleControl::XPersistMemory::Load(LPVOID lpStream, ULONG cbSize)
{
    METHOD_PROLOGUE_EX(COleControl, PersistMemory)

    HRESULT hr = S_OK;
    TRY
    {
        // Delegate to the Serialize method.
        CMemFile file((LPBYTE)lpStream, cbSize);
        CArchive ar(&file, CArchive::load);
        pThis->Serialize(ar);
    }
    CATCH_ALL(e)
    {
        // The load failed.  Delete any partially-initialized state.
        pThis->OnResetState();
        pThis->m_bInitialized = TRUE;
        hr = E_FAIL;
        DELETE_EXCEPTION(e);
    }
    END_CATCH_ALL

    // Clear the modified flag.
    pThis->m_bModified = FALSE;

    // Unless IOleObject::SetClientSite is called after this, we can
    // count on ambient properties being available while loading.
    pThis->m_bCountOnAmbients = TRUE;

    // Properties have been initialized
    pThis->m_bInitialized = TRUE;

    // Uncache cached ambient properties
    _afxAmbientCache->Cache(NULL);

    return hr;
}

STDMETHODIMP COleControl::XPersistMemory::Save(LPVOID, BOOL, ULONG)
{
    return E_NOTIMPL;
}

STDMETHODIMP COleControl::XPersistMemory::GetSizeMax(ULONG*)
{
    return E_NOTIMPL;
}

STDMETHODIMP COleControl::XPersistMemory::InitNew()
{
    METHOD_PROLOGUE_EX(COleControl, PersistMemory)

    // Delegate to OnResetState.
    pThis->OnResetState();

    // Unless IOleObject::SetClientSite is called after this, we can
    // count on ambient properties being available while loading.
    pThis->m_bCountOnAmbients = TRUE;

    // Properties have been initialized
    pThis->m_bInitialized = TRUE;

    // Uncache cached ambient properties
    _afxAmbientCache->Cache(NULL);

    return S_OK;
}

/////////////////////////////////////////////////////////////////////////////
// Force any extra compiler-generated code into AFX_INIT_SEG

#ifdef AFX_INIT_SEG
#pragma code_seg(AFX_INIT_SEG)
#endif