// 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;
}
// #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