X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9e2896e5c8944c5f5227fa080e1b781c4a6f2600..6cc687bfee071b5328f9e48d1708795287006bb7:/src/msw/ole/droptgt.cpp diff --git a/src/msw/ole/droptgt.cpp b/src/msw/ole/droptgt.cpp index c9f5feb506..d1e4a97b11 100644 --- a/src/msw/ole/droptgt.cpp +++ b/src/msw/ole/droptgt.cpp @@ -30,12 +30,15 @@ #include "wx/setup.h" -#if wxUSE_DRAG_AND_DROP +#if wxUSE_OLE && wxUSE_DRAG_AND_DROP #include "wx/log.h" #ifdef __WIN32__ - #ifndef __GNUWIN32__ + #if !defined(__GNUWIN32__) || wxUSE_NORLANDER_HEADERS + #if wxCHECK_W32API_VERSION( 1, 0 ) + #include + #endif #include // for DROPFILES structure #endif #else @@ -60,30 +63,42 @@ class wxIDropTarget : public IDropTarget { public: - wxIDropTarget(wxDropTarget *p); - ~wxIDropTarget(); + wxIDropTarget(wxDropTarget *p); + virtual ~wxIDropTarget(); - // IDropTarget methods - STDMETHODIMP DragEnter(LPDATAOBJECT, DWORD, POINTL, LPDWORD); - STDMETHODIMP DragOver(DWORD, POINTL, LPDWORD); - STDMETHODIMP DragLeave(void); - STDMETHODIMP Drop(LPDATAOBJECT, DWORD, POINTL, LPDWORD); + // accessors for wxDropTarget + void SetHwnd(HWND hwnd) { m_hwnd = hwnd; } - DECLARE_IUNKNOWN_METHODS; + // IDropTarget methods + STDMETHODIMP DragEnter(LPDATAOBJECT, DWORD, POINTL, LPDWORD); + STDMETHODIMP DragOver(DWORD, POINTL, LPDWORD); + STDMETHODIMP DragLeave(); + STDMETHODIMP Drop(LPDATAOBJECT, DWORD, POINTL, LPDWORD); + + DECLARE_IUNKNOWN_METHODS; protected: - IDataObject *m_pIDataObject; // !NULL between DragEnter and DragLeave/Drop - wxDropTarget *m_pTarget; // the real target (we're just a proxy) + IDataObject *m_pIDataObject; // !NULL between DragEnter and DragLeave/Drop + wxDropTarget *m_pTarget; // the real target (we're just a proxy) + + HWND m_hwnd; // window we're associated with -private: - static inline DWORD GetDropEffect(DWORD flags); + // get default drop effect for given keyboard flags + static inline DWORD GetDropEffect(DWORD flags); }; +// ---------------------------------------------------------------------------- +// private functions +// ---------------------------------------------------------------------------- + +static wxDragResult ConvertDragEffectToResult(DWORD dwEffect); +static DWORD ConvertDragResultToEffect(wxDragResult result); + // ============================================================================ // wxIDropTarget implementation // ============================================================================ -// Name : static wxDropTarget::GetDropEffect +// Name : static wxIDropTarget::GetDropEffect // Purpose : determine the drop operation from keyboard/mouse state. // Returns : DWORD combined from DROPEFFECT_xxx constants // Params : [in] DWORD flags kbd & mouse flags as passed to @@ -127,29 +142,57 @@ STDMETHODIMP wxIDropTarget::DragEnter(IDataObject *pIDataSource, POINTL pt, DWORD *pdwEffect) { - wxLogDebug(wxT("IDropTarget::DragEnter")); + wxLogTrace(wxTRACE_OleCalls, wxT("IDropTarget::DragEnter")); + + wxASSERT_MSG( m_pIDataObject == NULL, + _T("drop target must have data object") ); + + // show the list of formats supported by the source data object for the + // debugging purposes, this is quite useful sometimes - please don't remove +#if 0 + IEnumFORMATETC *penumFmt; + if ( SUCCEEDED(pIDataSource->EnumFormatEtc(DATADIR_GET, &penumFmt)) ) + { + FORMATETC fmt; + while ( penumFmt->Next(1, &fmt, NULL) == S_OK ) + { + wxLogDebug(_T("Drop source supports format %s"), + wxDataObject::GetFormatName(fmt.cfFormat)); + } - wxASSERT( m_pIDataObject == NULL ); + penumFmt->Release(); + } + else + { + wxLogLastError(_T("IDataObject::EnumFormatEtc")); + } +#endif // 0 - if ( !m_pTarget->IsAcceptedData(pIDataSource) ) { - // we don't accept this kind of data - *pdwEffect = DROPEFFECT_NONE; + if ( !m_pTarget->IsAcceptedData(pIDataSource) ) { + // we don't accept this kind of data + *pdwEffect = DROPEFFECT_NONE; - return S_OK; - } - - // TODO should check the point also? + return S_OK; + } - *pdwEffect = GetDropEffect(grfKeyState); + // get hold of the data object + m_pIDataObject = pIDataSource; + m_pIDataObject->AddRef(); - // get hold of the data object - m_pIDataObject = pIDataSource; - m_pIDataObject->AddRef(); + // we need client coordinates to pass to wxWin functions + if ( !ScreenToClient(m_hwnd, (POINT *)&pt) ) + { + wxLogLastError(wxT("ScreenToClient")); + } - // give some visual feedback - m_pTarget->OnEnter(); + // give some visual feedback + *pdwEffect = ConvertDragResultToEffect( + m_pTarget->OnEnter(pt.x, pt.y, + ConvertDragEffectToResult(GetDropEffect(grfKeyState)) + ) + ); - return S_OK; + return S_OK; } // Name : wxIDropTarget::DragOver @@ -165,11 +208,28 @@ STDMETHODIMP wxIDropTarget::DragOver(DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect) { - // there are too many of them... wxLogDebug("IDropTarget::DragOver"); + // there are too many of them... wxLogDebug("IDropTarget::DragOver"); - *pdwEffect = m_pIDataObject == NULL ? DROPEFFECT_NONE - : GetDropEffect(grfKeyState); - return S_OK; + wxDragResult result; + if ( m_pIDataObject ) { + result = ConvertDragEffectToResult(GetDropEffect(grfKeyState)); + } + else { + // can't accept data anyhow normally + result = wxDragNone; + } + + // we need client coordinates to pass to wxWin functions + if ( !ScreenToClient(m_hwnd, (POINT *)&pt) ) + { + wxLogLastError(wxT("ScreenToClient")); + } + + *pdwEffect = ConvertDragResultToEffect( + m_pTarget->OnDragOver(pt.x, pt.y, result) + ); + + return S_OK; } // Name : wxIDropTarget::DragLeave @@ -178,7 +238,7 @@ STDMETHODIMP wxIDropTarget::DragOver(DWORD grfKeyState, // Notes : good place to do any clean-up STDMETHODIMP wxIDropTarget::DragLeave() { - wxLogDebug(wxT("IDropTarget::DragLeave")); + wxLogTrace(wxTRACE_OleCalls, wxT("IDropTarget::DragLeave")); // remove the UI feedback m_pTarget->OnLeave(); @@ -203,7 +263,7 @@ STDMETHODIMP wxIDropTarget::Drop(IDataObject *pIDataSource, POINTL pt, DWORD *pdwEffect) { - wxLogDebug(wxT("IDropTarget::Drop")); + 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 @@ -212,15 +272,23 @@ STDMETHODIMP wxIDropTarget::Drop(IDataObject *pIDataSource, // by default, nothing happens *pdwEffect = DROPEFFECT_NONE; + // 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->SetDataSource(pIDataSource); // and now it has the data - if ( m_pTarget->OnData(pt.x, pt.y) ) { + wxDragResult rc = ConvertDragEffectToResult(GetDropEffect(grfKeyState)); + rc = m_pTarget->OnData(pt.x, pt.y, rc); + if ( wxIsDragResultOk(rc) ) { // operation succeeded - *pdwEffect = GetDropEffect(grfKeyState); + *pdwEffect = ConvertDragResultToEffect(rc); } //else: *pdwEffect is already DROPEFFECT_NONE } @@ -262,7 +330,7 @@ bool wxDropTarget::Register(WXHWND hwnd) { HRESULT hr = ::CoLockObjectExternal(m_pIDropTarget, TRUE, FALSE); if ( FAILED(hr) ) { - wxLogApiError("CoLockObjectExternal", hr); + wxLogApiError(wxT("CoLockObjectExternal"), hr); return FALSE; } @@ -270,10 +338,13 @@ bool wxDropTarget::Register(WXHWND hwnd) if ( FAILED(hr) ) { ::CoLockObjectExternal(m_pIDropTarget, FALSE, FALSE); - wxLogApiError("RegisterDragDrop", hr); + wxLogApiError(wxT("RegisterDragDrop"), hr); return FALSE; } + // we will need the window handle for coords transformation later + m_pIDropTarget->SetHwnd((HWND)hwnd); + return TRUE; } @@ -282,10 +353,12 @@ void wxDropTarget::Revoke(WXHWND hwnd) HRESULT hr = ::RevokeDragDrop((HWND) hwnd); if ( FAILED(hr) ) { - wxLogApiError("RevokeDragDrop", hr); + wxLogApiError(wxT("RevokeDragDrop"), hr); } ::CoLockObjectExternal(m_pIDropTarget, FALSE, TRUE); + + m_pIDropTarget->SetHwnd(0); } // ---------------------------------------------------------------------------- @@ -329,11 +402,11 @@ bool wxDropTarget::GetData() rc = TRUE; } else { - wxLogLastError("IDataObject::SetData()"); + wxLogApiError(wxT("IDataObject::SetData()"), hr); } } else { - wxLogLastError("IDataObject::GetData()"); + wxLogApiError(wxT("IDataObject::GetData()"), hr); } return rc; @@ -373,7 +446,8 @@ wxDataFormat wxDropTarget::GetSupportedFormat(IDataObject *pIDataSource) const // get the list of supported formats size_t nFormats = m_dataObject->GetFormatCount(wxDataObject::Set); - wxDataFormat format, *formats; + wxDataFormat format; + wxDataFormat *formats; formats = nFormats == 1 ? &format : new wxDataFormat[nFormats]; m_dataObject->GetAllFormats(formats, wxDataObject::Set); @@ -397,42 +471,53 @@ wxDataFormat wxDropTarget::GetSupportedFormat(IDataObject *pIDataSource) const delete [] formats; } - return n < nFormats ? format : wxDF_INVALID; + return n < nFormats ? format : wxFormatInvalid; } // ---------------------------------------------------------------------------- -// wxTextDropTarget +// private functions // ---------------------------------------------------------------------------- -wxTextDropTarget::wxTextDropTarget() - : wxDropTarget(new wxTextDataObject) +static wxDragResult ConvertDragEffectToResult(DWORD dwEffect) { -} + switch ( dwEffect ) { + case DROPEFFECT_COPY: + return wxDragCopy; -bool wxTextDropTarget::OnData(wxCoord x, wxCoord y) -{ - if ( !GetData() ) - return FALSE; + case DROPEFFECT_LINK: + return wxDragLink; - return OnDropText(x, y, ((wxTextDataObject *)m_dataObject)->GetText()); -} + case DROPEFFECT_MOVE: + return wxDragMove; -// ---------------------------------------------------------------------------- -// wxFileDropTarget -// ---------------------------------------------------------------------------- + default: + wxFAIL_MSG(wxT("invalid value in ConvertDragEffectToResult")); + // fall through -wxFileDropTarget::wxFileDropTarget() - : wxDropTarget(new wxFileDataObject) -{ + case DROPEFFECT_NONE: + return wxDragNone; + } } -bool wxFileDropTarget::OnData(wxCoord x, wxCoord y) +static DWORD ConvertDragResultToEffect(wxDragResult result) { - if ( !GetData() ) - return FALSE; + switch ( result ) { + case wxDragCopy: + return DROPEFFECT_COPY; + + case wxDragLink: + return DROPEFFECT_LINK; + + case wxDragMove: + return DROPEFFECT_MOVE; - return OnDropFiles(x, y, - ((wxFileDataObject *)m_dataObject)->GetFilenames()); + default: + wxFAIL_MSG(wxT("invalid value in ConvertDragResultToEffect")); + // fall through + + case wxDragNone: + return DROPEFFECT_NONE; + } } #endif