366 lines
8.6 KiB
C++
366 lines
8.6 KiB
C++
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/*++
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Copyright (C) 1993-1999 Microsoft Corporation
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Module Name:
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idataobj.cpp
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Abstract:
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Implementation of the IDataObject interface.
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--*/
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#include "polyline.h"
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#include "unkhlpr.h"
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// CImpIDataObject interface implmentation
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IMPLEMENT_CONTAINED_INTERFACE(CPolyline, CImpIDataObject)
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/*
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* CImpIDataObject::GetData
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*
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* Purpose:
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* Retrieves data described by a specific FormatEtc into a StgMedium
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* allocated by this function. Used like GetClipboardData.
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*
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* Parameters:
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* pFE LPFORMATETC describing the desired data.
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* pSTM LPSTGMEDIUM in which to return the data.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP
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CImpIDataObject::GetData(
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LPFORMATETC pFE,
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LPSTGMEDIUM pSTM)
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{
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CLIPFORMAT cf=pFE->cfFormat;
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IStream *pIStream;
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HRESULT hr;
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HDC hDevDC = NULL;
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//Check the aspects we support.
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if (!(DVASPECT_CONTENT & pFE->dwAspect))
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return ResultFromScode(DATA_E_FORMATETC);
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pSTM->pUnkForRelease=NULL;
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//Run creates the window to use as a basis for extents
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m_pObj->m_pImpIRunnableObject->Run(NULL);
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//Go render the appropriate data for the format.
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switch (cf)
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{
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case CF_METAFILEPICT:
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pSTM->tymed=TYMED_MFPICT;
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hDevDC = CreateTargetDC (NULL, pFE->ptd );
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if (hDevDC) {
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hr = m_pObj->RenderMetafilePict(&pSTM->hGlobal, hDevDC);
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::DeleteDC(hDevDC);
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}
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else {
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hr = ResultFromScode(E_FAIL);
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}
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return hr;
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case CF_BITMAP:
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pSTM->tymed=TYMED_GDI;
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hDevDC = CreateTargetDC (NULL, pFE->ptd );
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if (hDevDC) {
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hr = m_pObj->RenderBitmap((HBITMAP *)&pSTM->hGlobal, hDevDC);
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::DeleteDC(hDevDC);
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}
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else {
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hr = ResultFromScode(E_FAIL);
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}
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return hr;
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default:
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if (cf == m_pObj->m_cf)
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{
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hr = CreateStreamOnHGlobal(NULL, TRUE, &pIStream);
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if (FAILED(hr))
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return ResultFromScode(E_OUTOFMEMORY);
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hr = m_pObj->m_pCtrl->SaveToStream(pIStream);
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if (FAILED(hr))
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{
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pIStream->Release();
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return hr;
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}
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pSTM->tymed = TYMED_ISTREAM;
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pSTM->pstm = pIStream;
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return NOERROR;
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}
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break;
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}
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return ResultFromScode(DATA_E_FORMATETC);
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}
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/*
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* CImpIDataObject::GetDataHere
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*
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* Purpose:
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* Renders the specific FormatEtc into caller-allocated medium
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* provided in pSTM.
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*
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* Parameters:
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* pFE LPFORMATETC describing the desired data.
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* pSTM LPSTGMEDIUM providing the medium into which
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* wer render the data.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIDataObject::GetDataHere(LPFORMATETC pFE, LPSTGMEDIUM pSTM)
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{
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CLIPFORMAT cf;
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HRESULT hr;
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/*
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* The only reasonable time this is called is for
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* CFSTR_EMBEDSOURCE and TYMED_ISTORAGE (and later for
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* CFSTR_LINKSOURCE). This means the same as
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* IPersistStorage::Save.
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*/
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cf=(CLIPFORMAT)RegisterClipboardFormat(CFSTR_EMBEDSOURCE);
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//Aspect is unimportant to us here, as is lindex and ptd.
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if (cf == pFE->cfFormat && (TYMED_ISTORAGE & pFE->tymed))
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{
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//We have an IStorage we can write into.
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pSTM->tymed=TYMED_ISTORAGE;
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pSTM->pUnkForRelease=NULL;
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hr = m_pObj->m_pImpIPersistStorage->Save(pSTM->pstg, FALSE);
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m_pObj->m_pImpIPersistStorage->SaveCompleted(NULL);
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return hr;
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}
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return ResultFromScode(DATA_E_FORMATETC);
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}
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/*
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* CImpIDataObject::QueryGetData
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*
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* Purpose:
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* Tests if a call to GetData with this FormatEtc will provide
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* any rendering; used like IsClipboardFormatAvailable.
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*
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* Parameters:
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* pFE LPFORMATETC describing the desired data.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIDataObject::QueryGetData(LPFORMATETC pFE)
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{
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CLIPFORMAT cf=pFE->cfFormat;
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BOOL fRet=FALSE;
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//Check the aspects we support.
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if (!(DVASPECT_CONTENT & pFE->dwAspect))
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return ResultFromScode(DATA_E_FORMATETC);
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switch (cf)
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{
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case CF_METAFILEPICT:
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fRet=(BOOL)(pFE->tymed & TYMED_MFPICT);
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break;
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case CF_BITMAP:
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fRet=(BOOL)(pFE->tymed & TYMED_GDI);
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break;
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default:
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//Check our own format.
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fRet=((cf==m_pObj->m_cf)
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&& (BOOL)(pFE->tymed & (TYMED_ISTREAM) ));
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break;
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}
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return fRet ? NOERROR : ResultFromScode(DATA_E_FORMATETC);
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}
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/*
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* CImpIDataObject::GetCanonicalFormatEtc
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*
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* Purpose:
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* Provides the caller with an equivalent FormatEtc to the one
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* provided when different FormatEtcs will produce exactly the
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* same renderings.
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*
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* Parameters:
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* pFEIn LPFORMATETC of the first description.
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* pFEOut LPFORMATETC of the equal description.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIDataObject::GetCanonicalFormatEtc
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(LPFORMATETC /* pFEIn */, LPFORMATETC pFEOut)
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{
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if (NULL==pFEOut)
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return ResultFromScode(E_INVALIDARG);
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pFEOut->ptd=NULL;
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return ResultFromScode(DATA_S_SAMEFORMATETC);
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}
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/*
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* CImpIDataObject::SetData
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*
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* Purpose:
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* Places data described by a FormatEtc and living in a StgMedium
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* into the object. The object may be responsible to clean up the
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* StgMedium before exiting.
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*
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* Parameters:
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* pFE LPFORMATETC describing the data to set.
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* pSTM LPSTGMEDIUM containing the data.
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* fRelease BOOL indicating if this function is responsible
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* for freeing the data.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIDataObject::SetData(
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LPFORMATETC pFE ,
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LPSTGMEDIUM pSTM,
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BOOL fRelease
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)
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{
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CLIPFORMAT cf=pFE->cfFormat;
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HRESULT hr;
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//Check for our own clipboard format and DVASPECT_CONTENT
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if ((cf!=m_pObj->m_cf) || !(DVASPECT_CONTENT & pFE->dwAspect))
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return ResultFromScode(DATA_E_FORMATETC);
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// The medium must be a stream
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if (TYMED_ISTREAM != pSTM->tymed)
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return ResultFromScode(DATA_E_FORMATETC);
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hr = m_pObj->m_pCtrl->LoadFromStream(pSTM->pstm);
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if (fRelease)
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ReleaseStgMedium(pSTM);
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return hr;
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}
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/*
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* CImpIDataObject::EnumFormatEtc
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*
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* Purpose:
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* Returns an IEnumFORMATETC object through which the caller can
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* iterate to learn about all the data formats this object can
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* provide through either GetData[Here] or SetData.
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*
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* Parameters:
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* dwDir DWORD describing a data direction, either
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* DATADIR_SET or DATADIR_GET.
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* ppEnum LPENUMFORMATETC * in which to return the
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* pointer to the enumerator.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIDataObject::EnumFormatEtc(
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DWORD dwDir,
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LPENUMFORMATETC *ppEnum
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)
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{
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return m_pObj->m_pDefIDataObject->EnumFormatEtc(dwDir, ppEnum);
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}
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/*
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* CImpIDataObject::DAdvise
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* CImpIDataObject::DUnadvise
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* CImpIDataObject::EnumDAdvise
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*/
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STDMETHODIMP CImpIDataObject::DAdvise(
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LPFORMATETC pFE,
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DWORD dwFlags,
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LPADVISESINK pIAdviseSink,
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LPDWORD pdwConn
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)
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{
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HRESULT hr;
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// Check if requested format is supported
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hr = QueryGetData(pFE);
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if (FAILED(hr))
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return hr;
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if (NULL == m_pObj->m_pIDataAdviseHolder)
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{
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hr = CreateDataAdviseHolder(&m_pObj->m_pIDataAdviseHolder);
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if (FAILED(hr))
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return ResultFromScode(E_OUTOFMEMORY);
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}
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hr = m_pObj->m_pIDataAdviseHolder->Advise(this,
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pFE,
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dwFlags,
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pIAdviseSink,
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pdwConn);
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return hr;
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}
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STDMETHODIMP CImpIDataObject::DUnadvise(DWORD dwConn)
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{
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HRESULT hr;
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if (NULL==m_pObj->m_pIDataAdviseHolder)
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return ResultFromScode(E_FAIL);
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hr=m_pObj->m_pIDataAdviseHolder->Unadvise(dwConn);
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return hr;
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}
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STDMETHODIMP CImpIDataObject::EnumDAdvise(LPENUMSTATDATA *ppEnum)
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{
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HRESULT hr;
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if (NULL==m_pObj->m_pIDataAdviseHolder)
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return ResultFromScode(E_FAIL);
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hr=m_pObj->m_pIDataAdviseHolder->EnumAdvise(ppEnum);
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return hr;
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}
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