コード例 #1
0
ファイル: droptgt.cpp プロジェクト: Zombiebest/Dolphin
// Name    : wxIDropTarget::Drop
// Purpose : Instructs the drop target to paste data that was just now
//           dropped on it.
// Returns : S_OK
// Params  : [in]    IDataObject *pIDataSource     the data to paste
//           [in]    DWORD        grfKeyState      kbd & mouse state
//           [in]    POINTL       pt               where the drop occurred?
//           [in/out]DWORD       *pdwEffect        operation effect
// Notes   :
STDMETHODIMP wxIDropTarget::Drop(IDataObject *pIDataSource,
                                 DWORD        grfKeyState,
                                 POINTL       pt,
                                 DWORD       *pdwEffect)
{
    wxLogTrace(wxTRACE_OleCalls, wxT("IDropTarget::Drop"));

    // TODO I don't know why there is this parameter, but so far I assume
    //      that it's the same we've already got in DragEnter
    wxASSERT( m_pIDataObject == pIDataSource );

    // we need client coordinates to pass to wxWin functions
    if ( !ScreenToClient(m_hwnd, (POINT *)&pt) )
    {
        wxLogLastError(wxT("ScreenToClient"));
    }

    // first ask the drop target if it wants data
    if ( m_pTarget->OnDrop(pt.x, pt.y) ) {
        // it does, so give it the data source
        m_pTarget->MSWSetDataSource(pIDataSource);

        // and now it has the data
        wxDragResult rc = ConvertDragEffectToResult(
            GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect));
        rc = m_pTarget->OnData(pt.x, pt.y, rc);
        if ( wxIsDragResultOk(rc) ) {
            // operation succeeded
            *pdwEffect = ConvertDragResultToEffect(rc);
        }
        else {
            *pdwEffect = DROPEFFECT_NONE;
        }
    }
    else {
        // OnDrop() returned false, no need to copy data
        *pdwEffect = DROPEFFECT_NONE;
    }

    // release the held object
    RELEASE_AND_NULL(m_pIDataObject);

    return S_OK;
}
コード例 #2
0
ファイル: dnd.cpp プロジェクト: EdgarTx/wx
// #pragma page   "CIDropTarget::Drop"
/////////////////////////////////////////////////////////////////////////////
//
// CIDropTarget::Drop
//
//   Instructs the drop target to paste data that was just now dropped on it.
//
// PARAMETERS
//   pIDataSource -- the data to paste
//   dwKeyState   -- kbd & mouse state
//   pt           -- mouse coordinates
//   pdwEffect    -- effect flag
//
// RETURN VALUE
//  STDMETHODIMP S_OK
//
/////////////////////////////////////////////////////////////////////////////
MRESULT CIDropTarget::Drop ()
{
    char                            zBuffer[128];
    ULONG                           ulBytes;
    USHORT                          uOp = 0;
    USHORT                          uIndicator;
    ULONG                           ulItems;
    ULONG                           i;

    ::DrgAccessDraginfo(m_pDragInfo);
    switch(m_pDragInfo->usOperation)
    {
        case DO_UNKNOWN:
            Free();
            return (MRFROM2SHORT(DOR_NODROPOP, 0));

        case DO_DEFAULT:
            m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, 0);
            ulBytes     = ::DrgQueryStrName( m_pDragItem->hstrContainerName
                                            ,128
                                            ,zBuffer
                                           );
            if (!ulBytes)
                return (MRFROM2SHORT(DOR_NODROPOP, 0));
            else
                uOp = DO_MOVE;
            break;

        case DO_COPY:
        case DO_MOVE:
            uOp = m_pDragInfo->usOperation;
            break;
    }
    uIndicator = DOR_DROP;
    ulItems = (ULONG)::DrgQueryDragitemCount(m_pDragInfo);
    for (i = 0; i < ulItems; i++)
    {
        m_pDragItem = ::DrgQueryDragitemPtr(m_pDragInfo, i);
        if (((m_pDragItem->fsSupportedOps & DO_COPYABLE) &&
             (uOp == (USHORT)DO_COPY))                   ||
            ((m_pDragItem->fsSupportedOps & DO_MOVEABLE) &&
             (uOp == (USHORT)DO_COPY)))
        {
            if (::DrgVerifyRMF(m_pDragItem, "DRM_OS2FILE", "DRF_UNKNOWN"))
                uIndicator = (USHORT)DOR_DROP;
            else
                uIndicator = (USHORT)DOR_NEVERDROP;
        }
    }

    //
    // First ask the drop target if it wants data
    //
    if (m_pTarget->OnDrop( m_pDragInfo->xDrop
                          ,m_pDragInfo->yDrop
                         ))
    {
        wxDragResult                 eRc = wxDragNone;

        //
        // And now it has the data
        //
        eRc = m_pTarget->OnData( m_pDragInfo->xDrop
                                ,m_pDragInfo->yDrop
                                ,eRc
                               );
    }
    //else: OnDrop() returned false, no need to copy data

    //
    // Release the held object
    //
    Free();
    return (MRFROM2SHORT(uIndicator, uOp));
} // end of CIDropTarget::Drop