wxDataObject and wxDropSource implementations
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
406
src/msw/ole/dataobj.cpp
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406
src/msw/ole/dataobj.cpp
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///////////////////////////////////////////////////////////////////////////////
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// Name: msw/ole/dataobj.cpp
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// Purpose: implementation of wx[I]DataObject class
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 10.05.98
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// RCS-ID: $Id$
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// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
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// Licence: wxWindows license
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///////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#ifdef __GNUG__
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#pragma implementation "dataobj.h"
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#if defined(__BORLANDC__)
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#pragma hdrstop
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#endif
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#include <wx/log.h>
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#include <wx/msw/ole/oleutils.h>
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#include <wx/msw/ole/dataobj.h>
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#ifndef __WIN32__
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#include <ole2.h>
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#include <olestd.h>
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#endif
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// ----------------------------------------------------------------------------
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// functions
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// ----------------------------------------------------------------------------
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#ifdef __DEBUG__
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static const char *GetTymedName(DWORD tymed);
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#else
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#define GetTymedName(tymed) ""
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#endif
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// ----------------------------------------------------------------------------
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// wxIEnumFORMATETC interface implementation
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// ----------------------------------------------------------------------------
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class wxIEnumFORMATETC : public IEnumFORMATETC
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{
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public:
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wxIEnumFORMATETC(CLIPFORMAT cf);
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DECLARE_IUNKNOWN_METHODS;
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// IEnumFORMATETC
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STDMETHODIMP Next(ULONG celt, FORMATETC *rgelt, ULONG *pceltFetched);
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STDMETHODIMP Skip(ULONG celt);
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STDMETHODIMP Reset();
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STDMETHODIMP Clone(IEnumFORMATETC **ppenum);
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private:
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FORMATETC m_format; // (unique @@@) format we can provide data in
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ULONG m_nCurrent; // current enum position (currently either 0 or 1)
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};
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// ----------------------------------------------------------------------------
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// wxIDataObject implementation of IDataObject interface
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// ----------------------------------------------------------------------------
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class wxIDataObject : public IDataObject
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{
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public:
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wxIDataObject(wxDataObject *pDataObject);
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DECLARE_IUNKNOWN_METHODS;
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// IDataObject
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STDMETHODIMP GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium);
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STDMETHODIMP GetDataHere(FORMATETC *pformatetc, STGMEDIUM *pmedium);
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STDMETHODIMP QueryGetData(FORMATETC *pformatetc);
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STDMETHODIMP GetCanonicalFormatEtc(FORMATETC *In, FORMATETC *pOut);
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STDMETHODIMP SetData(FORMATETC *pfetc, STGMEDIUM *pmedium, BOOL fRelease);
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STDMETHODIMP EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC **ppenumFEtc);
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STDMETHODIMP DAdvise(FORMATETC *pfetc, DWORD ad, IAdviseSink *p, DWORD *pdw);
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STDMETHODIMP DUnadvise(DWORD dwConnection);
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STDMETHODIMP EnumDAdvise(IEnumSTATDATA **ppenumAdvise);
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private:
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wxDataObject *m_pDataObject; // pointer to C++ class we belong to
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};
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// wxIEnumFORMATETC
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// ----------------------------------------------------------------------------
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BEGIN_IID_TABLE(wxIEnumFORMATETC)
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ADD_IID(Unknown)
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ADD_IID(EnumFORMATETC)
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END_IID_TABLE;
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IMPLEMENT_IUNKNOWN_METHODS(wxIEnumFORMATETC)
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wxIEnumFORMATETC::wxIEnumFORMATETC(CLIPFORMAT cf)
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{
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m_format.cfFormat = cf;
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m_format.ptd = NULL;
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m_format.dwAspect = DVASPECT_CONTENT;
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m_format.lindex = -1;
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m_format.tymed = TYMED_HGLOBAL;
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m_cRef = 0;
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m_nCurrent = 0;
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}
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STDMETHODIMP wxIEnumFORMATETC::Next(ULONG celt,
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FORMATETC *rgelt,
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ULONG *pceltFetched)
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{
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wxLogTrace("wxIEnumFORMATETC::Next");
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if ( celt > 1 )
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return S_FALSE;
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if ( m_nCurrent == 0 ) {
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*rgelt = m_format;
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m_nCurrent++;
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return S_OK;
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}
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else
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return S_FALSE;
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}
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STDMETHODIMP wxIEnumFORMATETC::Skip(ULONG celt)
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{
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wxLogTrace("wxIEnumFORMATETC::Skip");
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if ( m_nCurrent == 0 )
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m_nCurrent++;
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return S_FALSE;
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}
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STDMETHODIMP wxIEnumFORMATETC::Reset()
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{
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wxLogTrace("wxIEnumFORMATETC::Reset");
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m_nCurrent = 0;
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return S_OK;
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}
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STDMETHODIMP wxIEnumFORMATETC::Clone(IEnumFORMATETC **ppenum)
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{
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wxLogTrace("wxIEnumFORMATETC::Clone");
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wxIEnumFORMATETC *pNew = new wxIEnumFORMATETC(m_format.cfFormat);
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pNew->AddRef();
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*ppenum = pNew;
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return S_OK;
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}
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// ----------------------------------------------------------------------------
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// wxIDataObject
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// ----------------------------------------------------------------------------
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BEGIN_IID_TABLE(wxIDataObject)
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ADD_IID(Unknown)
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ADD_IID(DataObject)
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END_IID_TABLE;
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IMPLEMENT_IUNKNOWN_METHODS(wxIDataObject)
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wxIDataObject::wxIDataObject(wxDataObject *pDataObject)
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{
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m_cRef = 0;
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m_pDataObject = pDataObject;
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}
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// get data functions
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STDMETHODIMP wxIDataObject::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium)
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{
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wxLogTrace("wxIDataObject::GetData");
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// is data is in our format?
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HRESULT hr = QueryGetData(pformatetcIn);
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if ( FAILED(hr) )
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return hr;
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// alloc memory
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HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE,
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m_pDataObject->GetDataSize());
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if ( hGlobal == NULL ) {
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wxLogLastError("GlobalAlloc");
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return E_OUTOFMEMORY;
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}
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// copy data
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pmedium->tymed = TYMED_HGLOBAL;
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pmedium->hGlobal = hGlobal;
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pmedium->pUnkForRelease = NULL;
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hr = GetDataHere(pformatetcIn, pmedium);
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if ( FAILED(hr) ) {
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GlobalFree(hGlobal);
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return hr;
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}
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return S_OK;
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}
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STDMETHODIMP wxIDataObject::GetDataHere(FORMATETC *pformatetc,
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STGMEDIUM *pmedium)
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{
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wxLogTrace("wxIDataObject::GetDataHere");
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// put data in caller provided medium
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if ( pmedium->tymed != TYMED_HGLOBAL )
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return DV_E_TYMED;
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// copy data
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void *pBuf = GlobalLock(pmedium->hGlobal);
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if ( pBuf == NULL ) {
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wxLogLastError("GlobalLock");
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return E_OUTOFMEMORY;
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}
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m_pDataObject->GetDataHere(pBuf);
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GlobalUnlock(pmedium->hGlobal);
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return S_OK;
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}
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// set data functions (not implemented)
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STDMETHODIMP wxIDataObject::SetData(FORMATETC *pformatetc,
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STGMEDIUM *pmedium,
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BOOL fRelease)
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{
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wxLogTrace("wxIDataObject::SetData");
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return E_NOTIMPL;
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}
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// information functions
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STDMETHODIMP wxIDataObject::QueryGetData(FORMATETC *pformatetc)
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{
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// do we accept data in this format?
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if ( pformatetc == NULL ) {
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wxLogTrace("wxIDataObject::QueryGetData: invalid ptr.");
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return E_INVALIDARG;
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}
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// the only one allowed by current COM implementation
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if ( pformatetc->lindex != -1 ) {
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wxLogTrace("wxIDataObject::QueryGetData: bad lindex %d",
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pformatetc->lindex);
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return DV_E_LINDEX;
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}
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// we don't support anything other (THUMBNAIL, ICON, DOCPRINT...)
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if ( pformatetc->dwAspect != DVASPECT_CONTENT ) {
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wxLogTrace("wxIDataObject::QueryGetData: bad dwAspect %d",
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pformatetc->dwAspect);
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return DV_E_DVASPECT;
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}
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// @@ we only transfer data by global memory (bad for large amounts of it!)
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if ( !(pformatetc->tymed & TYMED_HGLOBAL) ) {
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wxLogTrace("wxIDataObject::QueryGetData: %s != TYMED_HGLOBAL.",
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GetTymedName(pformatetc->tymed));
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return DV_E_TYMED;
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}
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// and now check the type of data requested
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if ( m_pDataObject->IsSupportedFormat(pformatetc->cfFormat) ) {
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wxLogTrace("wxIDataObject::QueryGetData: %s ok",
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wxDataObject::GetFormatName(pformatetc->cfFormat));
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return S_OK;
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}
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else {
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wxLogTrace("wxIDataObject::QueryGetData: %s unsupported",
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wxDataObject::GetFormatName(pformatetc->cfFormat));
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return DV_E_FORMATETC;
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}
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}
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STDMETHODIMP wxIDataObject::GetCanonicalFormatEtc(FORMATETC *pFormatetcIn,
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FORMATETC *pFormatetcOut)
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{
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wxLogTrace("wxIDataObject::GetCanonicalFormatEtc");
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// @@ implementation is trivial, we might want something better here
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if ( pFormatetcOut != NULL )
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pFormatetcOut->ptd = NULL;
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return DATA_S_SAMEFORMATETC;
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}
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STDMETHODIMP wxIDataObject::EnumFormatEtc(DWORD dwDirection,
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IEnumFORMATETC **ppenumFormatEtc)
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{
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wxLogTrace("wxIDataObject::EnumFormatEtc");
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if ( dwDirection == DATADIR_SET ) {
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// we don't allow setting of data anyhow
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return E_NOTIMPL;
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}
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wxIEnumFORMATETC *pEnum =
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new wxIEnumFORMATETC(m_pDataObject->GetPreferredFormat());
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pEnum->AddRef();
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*ppenumFormatEtc = pEnum;
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return S_OK;
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}
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// advise sink functions (not implemented)
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STDMETHODIMP wxIDataObject::DAdvise(FORMATETC *pformatetc,
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DWORD advf,
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IAdviseSink *pAdvSink,
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DWORD *pdwConnection)
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{
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return OLE_E_ADVISENOTSUPPORTED;
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}
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STDMETHODIMP wxIDataObject::DUnadvise(DWORD dwConnection)
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{
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return OLE_E_ADVISENOTSUPPORTED;
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}
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STDMETHODIMP wxIDataObject::EnumDAdvise(IEnumSTATDATA **ppenumAdvise)
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{
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return OLE_E_ADVISENOTSUPPORTED;
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}
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// ----------------------------------------------------------------------------
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// wxDataObject
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// ----------------------------------------------------------------------------
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wxDataObject::wxDataObject()
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{
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m_pIDataObject = new wxIDataObject(this);
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m_pIDataObject->AddRef();
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}
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wxDataObject::~wxDataObject()
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{
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m_pIDataObject->Release();
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}
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#ifdef __DEBUG__
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const char *wxDataObject::GetFormatName(wxDataFormat format)
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{
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static char s_szBuf[128];
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switch ( format ) {
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case CF_TEXT: return "CF_TEXT";
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case CF_BITMAP: return "CF_BITMAP";
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case CF_METAFILEPICT: return "CF_METAFILEPICT";
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case CF_SYLK: return "CF_SYLK";
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case CF_DIF: return "CF_DIF";
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case CF_TIFF: return "CF_TIFF";
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case CF_OEMTEXT: return "CF_OEMTEXT";
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case CF_DIB: return "CF_DIB";
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case CF_PALETTE: return "CF_PALETTE";
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case CF_PENDATA: return "CF_PENDATA";
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case CF_RIFF: return "CF_RIFF";
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case CF_WAVE: return "CF_WAVE";
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case CF_UNICODETEXT: return "CF_UNICODETEXT";
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case CF_ENHMETAFILE: return "CF_ENHMETAFILE";
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case CF_HDROP: return "CF_HDROP";
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case CF_LOCALE: return "CF_LOCALE";
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default:
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sprintf(s_szBuf, "clipboard format %d (unknown)", format);
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return s_szBuf;
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}
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}
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// ----------------------------------------------------------------------------
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// private functions
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// ----------------------------------------------------------------------------
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static const char *GetTymedName(DWORD tymed)
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{
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static char s_szBuf[128];
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switch ( tymed ) {
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case TYMED_HGLOBAL: return "TYMED_HGLOBAL";
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case TYMED_FILE: return "TYMED_FILE";
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case TYMED_ISTREAM: return "TYMED_ISTREAM";
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case TYMED_ISTORAGE: return "TYMED_ISTORAGE";
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case TYMED_GDI: return "TYMED_GDI";
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case TYMED_MFPICT: return "TYMED_MFPICT";
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case TYMED_ENHMF: return "TYMED_ENHMF";
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default:
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sprintf(s_szBuf, "type of media format %d (unknown)", tymed);
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return s_szBuf;
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}
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}
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#endif //DEBUG
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