tenant.cpp

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        return;

    if (NULL==pClsID || NULL==pwFormat || NULL==ppszType
        || NULL==phMetaIcon)
        return;


    /*
     * For embedded objects get the real CLSID of the object and
     * its format string.  If this fails then we can try to ask
     * the object, or we can look in the registry.
     */

    hr=ReadClassStg(m_pIStorage, pClsID);

    if (FAILED(hr))
        {
        hr=m_pIOleObject->GetUserClassID(pClsID);

        if (FAILED(hr))
            *pClsID=CLSID_NULL;
        }


    hr=ReadFmtUserTypeStg(m_pIStorage, pwFormat, ppszType);

    if (FAILED(hr))
        {
        *pwFormat=0;
        *ppszType=NULL;

        if (INOLE_GetUserTypeOfClass(*pClsID, 0, szType
            , sizeof(szType)))
            {
            *ppszType=INOLE_CopyString(szType);
            }
        }

    /*
     * Try to get the AuxUserType from the registry, using
     * the short version (registered under AuxUserType\2).
     * If that fails, just copy *ppszType.
     */
    *ppszLabel=NULL;

    if (INOLE_GetUserTypeOfClass(*pClsID, 2, szType
        , sizeof(szType)))
        {
        *ppszLabel=INOLE_CopyString(szType);
        }
    else
        *ppszLabel=INOLE_CopyString(*ppszType);

    //Get the icon for this thing, if we're iconic.
    *phMetaIcon=NULL;

    hr=m_pObj->QueryInterface(IID_IDataObject
        , (PPVOID)&pIDataObject);

    if (SUCCEEDED(hr))
        {
        SETFormatEtc(fe, CF_METAFILEPICT, DVASPECT_ICON, NULL
            , TYMED_MFPICT, -1);
        hr=pIDataObject->GetData(&fe, &stm);
        pIDataObject->Release();

        if (SUCCEEDED(hr))
            *phMetaIcon=stm.hGlobal;
        else
            *phMetaIcon=OleGetIconOfClass(*pClsID, NULL, TRUE);
        }

    return;
    }




/*
 * CTenant::SwitchOrUpdateAspect
 *
 * Purpose:
 *  Switches between DVASPECT_CONTENT and DVASPECT_ICON
 *
 * Parameters:
 *  hMetaIcon       HGLOBAL to the new icon if we're changing the
 *                  icon or switching to DVASPECT_ICON.  NULL to
 *                  change back to content.
 *  fPreserve       BOOL indicating if we're to preserve the old
 *                  aspect after changing.
 *
 * Return Value:
 *  BOOL            TRUE if anything changed, FALSE otherwise.
 */

BOOL CTenant::SwitchOrUpdateAspect(HGLOBAL hMetaIcon
    , BOOL fPreserve)
    {
    HRESULT     hr;
    DWORD       dwAspect;
    BOOL        fUpdate=FALSE;

    //Nothing to do if we're content already and there's no icon.
    if (NULL==hMetaIcon && DVASPECT_CONTENT==m_fe.dwAspect)
        return FALSE;

    //If we're iconic already, just cache the new icon
    if (NULL!=hMetaIcon && DVASPECT_ICON==m_fe.dwAspect)
        hr=INOLE_SetIconInCache(m_pIOleObject, hMetaIcon);
    else
        {
        //Otherwise, switch between iconic and content.
        dwAspect=(NULL==hMetaIcon) ? DVASPECT_CONTENT : DVASPECT_ICON;

        /*
         * Switch between aspects, where dwAspect has the new one
         * and m_fe.dwAspect will be changed in the process.
         */
        hr=INOLE_SwitchDisplayAspect(m_pIOleObject
            , &m_fe.dwAspect, dwAspect, hMetaIcon, !fPreserve
            , TRUE, m_pImpIAdviseSink, &fUpdate);

        if (SUCCEEDED(hr))
            {
            //Update MiscStatus for the new aspect
            m_pIOleObject->GetMiscStatus(m_fe.dwAspect, &m_grfMisc);

            if (fUpdate)
                m_pIOleObject->Update();    //This repaints.
            }
        }

    //If we switched, update our extents.
    if (SUCCEEDED(hr))
        {
        SIZEL       szl;

        m_pIOleObject->GetExtent(m_fe.dwAspect, &szl);

        if (0 > szl.cy)
            szl.cy=-szl.cy;

        //Convert HIMETRIC absolute units to our LOMETRIC mapping
        if (0!=szl.cx && 0!=szl.cy)
            SETSIZEL(szl, szl.cx/10, -szl.cy/10);

        Invalidate();                   //Remove old aspect
        SizeSet(&szl, FALSE, FALSE);    //Change size
        Repaint();                      //Paint the new one
        }

    return SUCCEEDED(hr);
    }



/*
 * CTenant::EnableRepaint
 *
 * Purpose:
 *  Toggles whether the Repaint function does anything.  This
 *  is used during conversion/emulation of an object to disable
 *  repaints until the new object can be given the proper extents.
 *
 * Parameters:
 *  fEnable         TRUE to enable repaints, FALSE to disable.
 *
 * Return Value:
 *  None
 */

void CTenant::EnableRepaint(BOOL fEnable)
    {
    m_fRepaintEnabled=fEnable;
    return;
    }








/*
 * CTenant::ObjectGet
 *
 * Purpose:
 *  Retrieves the LPUNKNOWN of the object in use by this tenant
 *
 * Parameters:
 *  ppUnk           LPUNKNOWN * in which to return the object
 *                  pointer.
 *
 * Return Value:
 *  None
 */

void CTenant::ObjectGet(LPUNKNOWN *ppUnk)
    {
    if (NULL!=ppUnk)
        {
        *ppUnk=m_pObj;
        m_pObj->AddRef();
        }

    return;
    }





/*
 * CTenant::FormatEtcGet
 *
 * Purpose:
 *  Retrieves the FORMATETC in use by this tenant
 *
 * Parameters:
 *  pFE             LPFORMATETC in which to store the information.
 *  fPresentation   BOOL indicating if we want the real format or
 *                  that of the presentation.
 *
 * Return Value:
 *  None
 */

void CTenant::FormatEtcGet(LPFORMATETC pFE, BOOL fPresentation)
    {
    if (NULL!=pFE)
        {
        *pFE=m_fe;

        //If there is no format, use metafile (for embedded objects)
        if (fPresentation || 0==pFE->cfFormat)
            {
            //Don't mess with dwAspect; might be icon or content.
            pFE->cfFormat=CF_METAFILEPICT;
            pFE->tymed=TYMED_MFPICT;
            }
        }

    return;
    }





/*
 * CTenant::SizeGet
 * CTenant::SizeSet
 * CTenant::RectGet
 * CTenant::RectSet
 *
 * Purpose:
 *  Returns or sets the size/position of the object contained here.
 *
 * Parameters:
 *  pszl/prcl       LPSIZEL (Size) or LPRECTL (Rect) with the
 *                  extents of interest.  In Get situations,
 *                  this will receive the extents; in Set it
 *                  contains the extents.
 *  fDevice         BOOL indicating that pszl/prcl is expressed
 *                  in device units.  Otherwise it's LOMETRIC.
 *  fInformObj      (Set Only) BOOL indicating if we need to inform
 *                  the object all.
 *
 * Return Value:
 *  None
 */

void CTenant::SizeGet(LPSIZEL pszl, BOOL fDevice)
    {
    if (!fDevice)
        {
        pszl->cx=m_rcl.right-m_rcl.left;
        pszl->cy=m_rcl.bottom-m_rcl.top;
        }
    else
        {
        RECT        rc;

        SetRect(&rc, (int)(m_rcl.right-m_rcl.left)
            , (int)(m_rcl.bottom-m_rcl.top), 0, 0);

        RectConvertMappings(&rc, NULL, TRUE);

        pszl->cx=(long)rc.left;
        pszl->cy=(long)rc.top;
        }

    return;
    }


void CTenant::SizeSet(LPSIZEL pszl, BOOL fDevice, BOOL fInformObj)
    {
    SIZEL           szl;

    if (!fDevice)
        {
        szl=*pszl;
        m_rcl.right =pszl->cx+m_rcl.left;
        m_rcl.bottom=pszl->cy+m_rcl.top;
        }
    else
        {
        RECT        rc;

        SetRect(&rc, (int)pszl->cx, (int)pszl->cy, 0, 0);
        RectConvertMappings(&rc, NULL, FALSE);

        m_rcl.right =(long)rc.left+m_rcl.left;
        m_rcl.bottom=(long)rc.top+m_rcl.top;

        SETSIZEL(szl, (long)rc.left, (long)rc.top);
        }


    //Tell OLE that this object was resized.
    if (NULL!=m_pIOleObject && fInformObj)
        {
        HRESULT     hr;
        BOOL        fRun=FALSE;

        //Convert our LOMETRIC into HIMETRIC by *=10
        szl.cx*=10;
        szl.cy*=-10;    //Our size is stored negative.

        /*
         * If the MiscStatus bit of OLEMISC_RECOMPOSEONRESIZE
         * is set, then we need to run the object before calling
         * SetExtent to make sure it has a real chance to
         * re-render the object.  We have to update and close
         * the object as well after this happens.
         */

        if (OLEMISC_RECOMPOSEONRESIZE & m_grfMisc)
            {
            if (!OleIsRunning(m_pIOleObject))
                {
                OleRun(m_pIOleObject);
                fRun=TRUE;
                }
            }

        hr=m_pIOleObject->SetExtent(m_fe.dwAspect, &szl);

        /*
         * If the object is not running and it does not have
         * RECOMPOSEONRESIZE, then SetExtent fails.  Make
         * sure that we call SetExtent again (by just calling
         * SizeSet here again) when we next run the object.
         */
        if (SUCCEEDED(hr))
            {
            m_fSetExtent=FALSE;

            if (fRun)
                {
                m_pIOleObject->Update();
                m_pIOleObject->Close(OLECLOSE_SAVEIFDIRTY);
                }
            }
        else
            {
            if (OLE_E_NOTRUNNING==GetScode(hr))
                m_fSetExtent=TRUE;
            }
        }

    return;
    }


void CTenant::RectGet(LPRECTL prcl, BOOL fDevice)
    {
    if (!fDevice)
        *prcl=m_rcl;
    else
        {
        RECT        rc;

        RECTFROMRECTL(rc, m_rcl);
        RectConvertMappings(&rc, NULL, TRUE);
        RECTLFROMRECT(*prcl, rc);
        }

    return;
    }


void CTenant::RectSet(LPRECTL prcl, BOOL fDevice, BOOL fInformObj)
    {
    SIZEL   szl;
    LONG    cx, cy;

    /*
     * Prevent reentrant calls that may come from calling
     * UpdateInPlaceObjectRects here and elsewhere.
     */
    if (m_fInRectSet)
        return;

    m_fInRectSet=TRUE;

    cx=m_rcl.right-m_rcl.left;
    cy=m_rcl.bottom-m_rcl.top;

    if (!fDevice)
        m_rcl=*prcl;
    else
        {
        RECT        rc;

        RECTFROMRECTL(rc, *prcl);
        RectConvertMappings(&rc, NULL, FALSE);
        RECTLFROMRECT(m_rcl, rc);
        }

    /*
     * Tell ourselves that the size changed, if it did.  SizeSet
     * will call IOleObject::SetExtent for us.
     */
    if ((m_rcl.right-m_rcl.left)!=cx || (m_rcl.bottom-m_rcl.top)!=cy)
        {
        SETSIZEL(szl, m_rcl.right-m_rcl.left, m_rcl.bottom-m_rcl.top);
        SizeSet(&szl, FALSE, fInformObj);
        }

    //Tell an in-place active object it moved too
    UpdateInPlaceObjectRects(NULL, TRUE);
    m_fInRectSet=FALSE;
    return;
    }







/*
 * CTenant::CreateStatic
 * (Protected)
 *
 * Purpose:
 *  Creates a new static bitmap or metafile object for this tenant
 *  using a freeloading method allowing us to specify exactly which
 *  type of data we want to paste since OleCreateStaticFromData
 *  doesn't.
 *
 * Parameters:
 *  pIDataObject    LPDATAOBJECT from which to paste.
 *  pFE             LPFORMATETC describing the format to paste.
 *  ppObj           LPUNKNOWN * into which we store the
 *                  object pointer.
 *
 * Return Value:
 *  HRESULT         NOERROR on success, error code otherwise.
 */

HRESULT CTenant::CreateStatic(LPDATAOBJECT pIDataObject
    , LPFORMATETC pFE, LPUNKNOWN *ppObj)
    {
    HRESULT             hr;
    STGMEDIUM           stm;
    LPUNKNOWN           pIUnknown;
    LPOLECACHE          pIOleCache;
    LPPERSISTSTORAGE    pIPersistStorage;
    CLSID               clsID;

    *ppObj=NULL;

    //Try to get the data desired as specified in pFE->cfFormat
    hr=pIDataObject->GetData(pFE, &stm);

    if (FAILED(hr))
        return hr;

    //Create the object to handle this data.
    if (CF_METAFILEPICT==pFE->cfFormat)
        clsID=CLSID_Picture_Metafile;
    else
        clsID=CLSID_Picture_Dib;

    hr=CreateDataCache(NULL, clsID, IID_IUnknown
        , (PPVOID)&pIUnknown);

    if (FAILED(hr))
        {
        ReleaseStgMedium(&stm);
        return hr;
        }

    m_clsID=clsID;

    //Stuff the data into the object
    pIUnknown->QueryInterface(IID_IPersistStorage
        , (PPVOID)&pIPersistStorage);
    pIPersistStorage->InitNew(m_pIStorage);

    //Now that we have the cache object, shove the data into it.
    pIUnknown->QueryInterface(IID_IOleCache, (PPVOID)&pIOleCache);