| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/msw/ole/droptgt.cpp |
| 3 | // Purpose: wxDropTarget implementation |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> |
| 9 | // Licence: wxWindows licence |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // Declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #if defined(__BORLANDC__) |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #if wxUSE_OLE && wxUSE_DRAG_AND_DROP |
| 28 | |
| 29 | #ifndef WX_PRECOMP |
| 30 | #include "wx/msw/wrapwin.h" |
| 31 | #include "wx/log.h" |
| 32 | #endif |
| 33 | |
| 34 | #include "wx/msw/private.h" |
| 35 | |
| 36 | #ifdef __WXWINCE__ |
| 37 | #include <winreg.h> |
| 38 | #include <ole2.h> |
| 39 | #endif |
| 40 | |
| 41 | #ifdef __WIN32__ |
| 42 | #if !defined(__GNUWIN32__) || wxUSE_NORLANDER_HEADERS |
| 43 | #include <shlobj.h> // for DROPFILES structure |
| 44 | #endif |
| 45 | #else |
| 46 | #include <shellapi.h> |
| 47 | #endif |
| 48 | |
| 49 | #include "wx/dnd.h" |
| 50 | |
| 51 | #include "wx/msw/ole/oleutils.h" |
| 52 | |
| 53 | // ---------------------------------------------------------------------------- |
| 54 | // IDropTarget interface: forward all interesting things to wxDropTarget |
| 55 | // (the name is unfortunate, but wx_I_DropTarget is not at all the same thing |
| 56 | // as wxDropTarget which is 'public' class, while this one is private) |
| 57 | // ---------------------------------------------------------------------------- |
| 58 | |
| 59 | class wxIDropTarget : public IDropTarget |
| 60 | { |
| 61 | public: |
| 62 | wxIDropTarget(wxDropTarget *p); |
| 63 | virtual ~wxIDropTarget(); |
| 64 | |
| 65 | // accessors for wxDropTarget |
| 66 | void SetHwnd(HWND hwnd) { m_hwnd = hwnd; } |
| 67 | |
| 68 | // IDropTarget methods |
| 69 | STDMETHODIMP DragEnter(LPDATAOBJECT, DWORD, POINTL, LPDWORD); |
| 70 | STDMETHODIMP DragOver(DWORD, POINTL, LPDWORD); |
| 71 | STDMETHODIMP DragLeave(); |
| 72 | STDMETHODIMP Drop(LPDATAOBJECT, DWORD, POINTL, LPDWORD); |
| 73 | |
| 74 | DECLARE_IUNKNOWN_METHODS; |
| 75 | |
| 76 | protected: |
| 77 | IDataObject *m_pIDataObject; // !NULL between DragEnter and DragLeave/Drop |
| 78 | wxDropTarget *m_pTarget; // the real target (we're just a proxy) |
| 79 | |
| 80 | HWND m_hwnd; // window we're associated with |
| 81 | |
| 82 | // get default drop effect for given keyboard flags |
| 83 | static DWORD GetDropEffect(DWORD flags, wxDragResult defaultAction, DWORD pdwEffect); |
| 84 | |
| 85 | DECLARE_NO_COPY_CLASS(wxIDropTarget) |
| 86 | }; |
| 87 | |
| 88 | // ---------------------------------------------------------------------------- |
| 89 | // private functions |
| 90 | // ---------------------------------------------------------------------------- |
| 91 | |
| 92 | static wxDragResult ConvertDragEffectToResult(DWORD dwEffect); |
| 93 | static DWORD ConvertDragResultToEffect(wxDragResult result); |
| 94 | |
| 95 | // ============================================================================ |
| 96 | // wxIDropTarget implementation |
| 97 | // ============================================================================ |
| 98 | |
| 99 | // Name : static wxIDropTarget::GetDropEffect |
| 100 | // Purpose : determine the drop operation from keyboard/mouse state. |
| 101 | // Returns : DWORD combined from DROPEFFECT_xxx constants |
| 102 | // Params : [in] DWORD flags kbd & mouse flags as passed to |
| 103 | // IDropTarget methods |
| 104 | // [in] wxDragResult defaultAction the default action of the drop target |
| 105 | // [in] DWORD pdwEffect the supported actions of the drop |
| 106 | // source passed to IDropTarget methods |
| 107 | // Notes : We do "move" normally and "copy" if <Ctrl> is pressed, |
| 108 | // which is the standard behaviour (currently there is no |
| 109 | // way to redefine it) |
| 110 | DWORD wxIDropTarget::GetDropEffect(DWORD flags, |
| 111 | wxDragResult defaultAction, |
| 112 | DWORD pdwEffect) |
| 113 | { |
| 114 | DWORD effectiveAction; |
| 115 | if ( defaultAction == wxDragCopy ) |
| 116 | effectiveAction = flags & MK_SHIFT ? DROPEFFECT_MOVE : DROPEFFECT_COPY; |
| 117 | else |
| 118 | effectiveAction = flags & MK_CONTROL ? DROPEFFECT_COPY : DROPEFFECT_MOVE; |
| 119 | |
| 120 | if ( !(effectiveAction & pdwEffect) ) |
| 121 | { |
| 122 | // the action is not supported by drag source, fall back to something |
| 123 | // that it does support |
| 124 | if ( pdwEffect & DROPEFFECT_MOVE ) |
| 125 | effectiveAction = DROPEFFECT_MOVE; |
| 126 | else if ( pdwEffect & DROPEFFECT_COPY ) |
| 127 | effectiveAction = DROPEFFECT_COPY; |
| 128 | else if ( pdwEffect & DROPEFFECT_LINK ) |
| 129 | effectiveAction = DROPEFFECT_LINK; |
| 130 | else |
| 131 | effectiveAction = DROPEFFECT_NONE; |
| 132 | } |
| 133 | |
| 134 | return effectiveAction; |
| 135 | } |
| 136 | |
| 137 | wxIDropTarget::wxIDropTarget(wxDropTarget *pTarget) |
| 138 | { |
| 139 | m_pTarget = pTarget; |
| 140 | m_pIDataObject = NULL; |
| 141 | } |
| 142 | |
| 143 | wxIDropTarget::~wxIDropTarget() |
| 144 | { |
| 145 | } |
| 146 | |
| 147 | BEGIN_IID_TABLE(wxIDropTarget) |
| 148 | ADD_IID(Unknown) |
| 149 | ADD_IID(DropTarget) |
| 150 | END_IID_TABLE; |
| 151 | |
| 152 | IMPLEMENT_IUNKNOWN_METHODS(wxIDropTarget) |
| 153 | |
| 154 | // Name : wxIDropTarget::DragEnter |
| 155 | // Purpose : Called when the mouse enters the window (dragging something) |
| 156 | // Returns : S_OK |
| 157 | // Params : [in] IDataObject *pIDataSource : source data |
| 158 | // [in] DWORD grfKeyState : kbd & mouse state |
| 159 | // [in] POINTL pt : mouse coordinates |
| 160 | // [in/out]DWORD *pdwEffect : effect flag |
| 161 | // In: Supported effects |
| 162 | // Out: Resulting effect |
| 163 | // Notes : |
| 164 | STDMETHODIMP wxIDropTarget::DragEnter(IDataObject *pIDataSource, |
| 165 | DWORD grfKeyState, |
| 166 | POINTL pt, |
| 167 | DWORD *pdwEffect) |
| 168 | { |
| 169 | wxLogTrace(wxTRACE_OleCalls, wxT("IDropTarget::DragEnter")); |
| 170 | |
| 171 | wxASSERT_MSG( m_pIDataObject == NULL, |
| 172 | _T("drop target must have data object") ); |
| 173 | |
| 174 | // show the list of formats supported by the source data object for the |
| 175 | // debugging purposes, this is quite useful sometimes - please don't remove |
| 176 | #if 0 |
| 177 | IEnumFORMATETC *penumFmt; |
| 178 | if ( SUCCEEDED(pIDataSource->EnumFormatEtc(DATADIR_GET, &penumFmt)) ) |
| 179 | { |
| 180 | FORMATETC fmt; |
| 181 | while ( penumFmt->Next(1, &fmt, NULL) == S_OK ) |
| 182 | { |
| 183 | wxLogDebug(_T("Drop source supports format %s"), |
| 184 | wxDataObject::GetFormatName(fmt.cfFormat)); |
| 185 | } |
| 186 | |
| 187 | penumFmt->Release(); |
| 188 | } |
| 189 | else |
| 190 | { |
| 191 | wxLogLastError(_T("IDataObject::EnumFormatEtc")); |
| 192 | } |
| 193 | #endif // 0 |
| 194 | |
| 195 | if ( !m_pTarget->IsAcceptedData(pIDataSource) ) { |
| 196 | // we don't accept this kind of data |
| 197 | *pdwEffect = DROPEFFECT_NONE; |
| 198 | |
| 199 | return S_OK; |
| 200 | } |
| 201 | |
| 202 | // get hold of the data object |
| 203 | m_pIDataObject = pIDataSource; |
| 204 | m_pIDataObject->AddRef(); |
| 205 | |
| 206 | // we need client coordinates to pass to wxWin functions |
| 207 | if ( !ScreenToClient(m_hwnd, (POINT *)&pt) ) |
| 208 | { |
| 209 | wxLogLastError(wxT("ScreenToClient")); |
| 210 | } |
| 211 | |
| 212 | // give some visual feedback |
| 213 | *pdwEffect = ConvertDragResultToEffect( |
| 214 | m_pTarget->OnEnter(pt.x, pt.y, ConvertDragEffectToResult( |
| 215 | GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect)) |
| 216 | ) |
| 217 | ); |
| 218 | |
| 219 | return S_OK; |
| 220 | } |
| 221 | |
| 222 | // Name : wxIDropTarget::DragOver |
| 223 | // Purpose : Indicates that the mouse was moved inside the window represented |
| 224 | // by this drop target. |
| 225 | // Returns : S_OK |
| 226 | // Params : [in] DWORD grfKeyState kbd & mouse state |
| 227 | // [in] POINTL pt mouse coordinates |
| 228 | // [in/out]LPDWORD pdwEffect current effect flag |
| 229 | // Notes : We're called on every WM_MOUSEMOVE, so this function should be |
| 230 | // very efficient. |
| 231 | STDMETHODIMP wxIDropTarget::DragOver(DWORD grfKeyState, |
| 232 | POINTL pt, |
| 233 | LPDWORD pdwEffect) |
| 234 | { |
| 235 | // there are too many of them... wxLogDebug("IDropTarget::DragOver"); |
| 236 | |
| 237 | wxDragResult result; |
| 238 | if ( m_pIDataObject ) { |
| 239 | result = ConvertDragEffectToResult( |
| 240 | GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect)); |
| 241 | } |
| 242 | else { |
| 243 | // can't accept data anyhow normally |
| 244 | result = wxDragNone; |
| 245 | } |
| 246 | |
| 247 | if ( result != wxDragNone ) { |
| 248 | // we need client coordinates to pass to wxWin functions |
| 249 | if ( !ScreenToClient(m_hwnd, (POINT *)&pt) ) |
| 250 | { |
| 251 | wxLogLastError(wxT("ScreenToClient")); |
| 252 | } |
| 253 | |
| 254 | *pdwEffect = ConvertDragResultToEffect( |
| 255 | m_pTarget->OnDragOver(pt.x, pt.y, result) |
| 256 | ); |
| 257 | } |
| 258 | else { |
| 259 | *pdwEffect = DROPEFFECT_NONE; |
| 260 | } |
| 261 | |
| 262 | return S_OK; |
| 263 | } |
| 264 | |
| 265 | // Name : wxIDropTarget::DragLeave |
| 266 | // Purpose : Informs the drop target that the operation has left its window. |
| 267 | // Returns : S_OK |
| 268 | // Notes : good place to do any clean-up |
| 269 | STDMETHODIMP wxIDropTarget::DragLeave() |
| 270 | { |
| 271 | wxLogTrace(wxTRACE_OleCalls, wxT("IDropTarget::DragLeave")); |
| 272 | |
| 273 | // remove the UI feedback |
| 274 | m_pTarget->OnLeave(); |
| 275 | |
| 276 | // release the held object |
| 277 | RELEASE_AND_NULL(m_pIDataObject); |
| 278 | |
| 279 | return S_OK; |
| 280 | } |
| 281 | |
| 282 | // Name : wxIDropTarget::Drop |
| 283 | // Purpose : Instructs the drop target to paste data that was just now |
| 284 | // dropped on it. |
| 285 | // Returns : S_OK |
| 286 | // Params : [in] IDataObject *pIDataSource the data to paste |
| 287 | // [in] DWORD grfKeyState kbd & mouse state |
| 288 | // [in] POINTL pt where the drop occurred? |
| 289 | // [in/out]DWORD *pdwEffect operation effect |
| 290 | // Notes : |
| 291 | STDMETHODIMP wxIDropTarget::Drop(IDataObject *pIDataSource, |
| 292 | DWORD grfKeyState, |
| 293 | POINTL pt, |
| 294 | DWORD *pdwEffect) |
| 295 | { |
| 296 | wxLogTrace(wxTRACE_OleCalls, wxT("IDropTarget::Drop")); |
| 297 | |
| 298 | // TODO I don't know why there is this parameter, but so far I assume |
| 299 | // that it's the same we've already got in DragEnter |
| 300 | wxASSERT( m_pIDataObject == pIDataSource ); |
| 301 | |
| 302 | // we need client coordinates to pass to wxWin functions |
| 303 | if ( !ScreenToClient(m_hwnd, (POINT *)&pt) ) |
| 304 | { |
| 305 | wxLogLastError(wxT("ScreenToClient")); |
| 306 | } |
| 307 | |
| 308 | // first ask the drop target if it wants data |
| 309 | if ( m_pTarget->OnDrop(pt.x, pt.y) ) { |
| 310 | // it does, so give it the data source |
| 311 | m_pTarget->SetDataSource(pIDataSource); |
| 312 | |
| 313 | // and now it has the data |
| 314 | wxDragResult rc = ConvertDragEffectToResult( |
| 315 | GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect)); |
| 316 | rc = m_pTarget->OnData(pt.x, pt.y, rc); |
| 317 | if ( wxIsDragResultOk(rc) ) { |
| 318 | // operation succeeded |
| 319 | *pdwEffect = ConvertDragResultToEffect(rc); |
| 320 | } |
| 321 | else { |
| 322 | *pdwEffect = DROPEFFECT_NONE; |
| 323 | } |
| 324 | } |
| 325 | else { |
| 326 | // OnDrop() returned false, no need to copy data |
| 327 | *pdwEffect = DROPEFFECT_NONE; |
| 328 | } |
| 329 | |
| 330 | // release the held object |
| 331 | RELEASE_AND_NULL(m_pIDataObject); |
| 332 | |
| 333 | return S_OK; |
| 334 | } |
| 335 | |
| 336 | // ============================================================================ |
| 337 | // wxDropTarget implementation |
| 338 | // ============================================================================ |
| 339 | |
| 340 | // ---------------------------------------------------------------------------- |
| 341 | // ctor/dtor |
| 342 | // ---------------------------------------------------------------------------- |
| 343 | |
| 344 | wxDropTarget::wxDropTarget(wxDataObject *dataObj) |
| 345 | : wxDropTargetBase(dataObj) |
| 346 | { |
| 347 | // create an IDropTarget implementation which will notify us about d&d |
| 348 | // operations. |
| 349 | m_pIDropTarget = new wxIDropTarget(this); |
| 350 | m_pIDropTarget->AddRef(); |
| 351 | } |
| 352 | |
| 353 | wxDropTarget::~wxDropTarget() |
| 354 | { |
| 355 | ReleaseInterface(m_pIDropTarget); |
| 356 | } |
| 357 | |
| 358 | // ---------------------------------------------------------------------------- |
| 359 | // [un]register drop handler |
| 360 | // ---------------------------------------------------------------------------- |
| 361 | |
| 362 | bool wxDropTarget::Register(WXHWND hwnd) |
| 363 | { |
| 364 | // FIXME |
| 365 | // RegisterDragDrop not available on Windows CE >= 400? |
| 366 | // Or maybe we can dynamically load them from ceshell.dll |
| 367 | // or similar. |
| 368 | #if defined(__WXWINCE__) && _WIN32_WCE >= 400 |
| 369 | wxUnusedVar(hwnd); |
| 370 | return false; |
| 371 | #else |
| 372 | HRESULT hr; |
| 373 | |
| 374 | // May exist in later WinCE versions |
| 375 | #ifndef __WXWINCE__ |
| 376 | hr = ::CoLockObjectExternal(m_pIDropTarget, TRUE, FALSE); |
| 377 | if ( FAILED(hr) ) { |
| 378 | wxLogApiError(wxT("CoLockObjectExternal"), hr); |
| 379 | return false; |
| 380 | } |
| 381 | #endif |
| 382 | |
| 383 | hr = ::RegisterDragDrop((HWND) hwnd, m_pIDropTarget); |
| 384 | if ( FAILED(hr) ) { |
| 385 | // May exist in later WinCE versions |
| 386 | #ifndef __WXWINCE__ |
| 387 | ::CoLockObjectExternal(m_pIDropTarget, FALSE, FALSE); |
| 388 | #endif |
| 389 | wxLogApiError(wxT("RegisterDragDrop"), hr); |
| 390 | return false; |
| 391 | } |
| 392 | |
| 393 | // we will need the window handle for coords transformation later |
| 394 | m_pIDropTarget->SetHwnd((HWND)hwnd); |
| 395 | |
| 396 | return true; |
| 397 | #endif |
| 398 | } |
| 399 | |
| 400 | void wxDropTarget::Revoke(WXHWND hwnd) |
| 401 | { |
| 402 | #if defined(__WXWINCE__) && _WIN32_WCE >= 400 |
| 403 | // Not available, see note above |
| 404 | wxUnusedVar(hwnd); |
| 405 | #else |
| 406 | HRESULT hr = ::RevokeDragDrop((HWND) hwnd); |
| 407 | |
| 408 | if ( FAILED(hr) ) { |
| 409 | wxLogApiError(wxT("RevokeDragDrop"), hr); |
| 410 | } |
| 411 | |
| 412 | // May exist in later WinCE versions |
| 413 | #ifndef __WXWINCE__ |
| 414 | ::CoLockObjectExternal(m_pIDropTarget, FALSE, TRUE); |
| 415 | #endif |
| 416 | |
| 417 | m_pIDropTarget->SetHwnd(0); |
| 418 | #endif |
| 419 | } |
| 420 | |
| 421 | // ---------------------------------------------------------------------------- |
| 422 | // base class pure virtuals |
| 423 | // ---------------------------------------------------------------------------- |
| 424 | |
| 425 | // OnDrop() is called only if we previously returned true from |
| 426 | // IsAcceptedData(), so no need to check anything here |
| 427 | bool wxDropTarget::OnDrop(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y)) |
| 428 | { |
| 429 | return true; |
| 430 | } |
| 431 | |
| 432 | // copy the data from the data source to the target data object |
| 433 | bool wxDropTarget::GetData() |
| 434 | { |
| 435 | wxDataFormat format = GetSupportedFormat(m_pIDataSource); |
| 436 | if ( format == wxDF_INVALID ) { |
| 437 | // this is strange because IsAcceptedData() succeeded previously! |
| 438 | wxFAIL_MSG(wxT("strange - did supported formats list change?")); |
| 439 | |
| 440 | return false; |
| 441 | } |
| 442 | |
| 443 | STGMEDIUM stm; |
| 444 | FORMATETC fmtMemory; |
| 445 | fmtMemory.cfFormat = format; |
| 446 | fmtMemory.ptd = NULL; |
| 447 | fmtMemory.dwAspect = DVASPECT_CONTENT; |
| 448 | fmtMemory.lindex = -1; |
| 449 | fmtMemory.tymed = TYMED_HGLOBAL; // TODO to add other media |
| 450 | |
| 451 | bool rc = false; |
| 452 | |
| 453 | HRESULT hr = m_pIDataSource->GetData(&fmtMemory, &stm); |
| 454 | if ( SUCCEEDED(hr) ) { |
| 455 | IDataObject *dataObject = m_dataObject->GetInterface(); |
| 456 | |
| 457 | hr = dataObject->SetData(&fmtMemory, &stm, TRUE); |
| 458 | if ( SUCCEEDED(hr) ) { |
| 459 | rc = true; |
| 460 | } |
| 461 | else { |
| 462 | wxLogApiError(wxT("IDataObject::SetData()"), hr); |
| 463 | } |
| 464 | } |
| 465 | else { |
| 466 | wxLogApiError(wxT("IDataObject::GetData()"), hr); |
| 467 | } |
| 468 | |
| 469 | return rc; |
| 470 | } |
| 471 | |
| 472 | // ---------------------------------------------------------------------------- |
| 473 | // callbacks used by wxIDropTarget |
| 474 | // ---------------------------------------------------------------------------- |
| 475 | |
| 476 | // we need a data source, so wxIDropTarget gives it to us using this function |
| 477 | void wxDropTarget::SetDataSource(IDataObject *pIDataSource) |
| 478 | { |
| 479 | m_pIDataSource = pIDataSource; |
| 480 | } |
| 481 | |
| 482 | // determine if we accept data of this type |
| 483 | bool wxDropTarget::IsAcceptedData(IDataObject *pIDataSource) const |
| 484 | { |
| 485 | return GetSupportedFormat(pIDataSource) != wxDF_INVALID; |
| 486 | } |
| 487 | |
| 488 | // ---------------------------------------------------------------------------- |
| 489 | // helper functions |
| 490 | // ---------------------------------------------------------------------------- |
| 491 | |
| 492 | wxDataFormat wxDropTarget::GetSupportedFormat(IDataObject *pIDataSource) const |
| 493 | { |
| 494 | // this strucutre describes a data of any type (first field will be |
| 495 | // changing) being passed through global memory block. |
| 496 | static FORMATETC s_fmtMemory = { |
| 497 | 0, |
| 498 | NULL, |
| 499 | DVASPECT_CONTENT, |
| 500 | -1, |
| 501 | TYMED_HGLOBAL // TODO is it worth supporting other tymeds here? |
| 502 | }; |
| 503 | |
| 504 | // get the list of supported formats |
| 505 | size_t nFormats = m_dataObject->GetFormatCount(wxDataObject::Set); |
| 506 | wxDataFormat format; |
| 507 | wxDataFormat *formats; |
| 508 | formats = nFormats == 1 ? &format : new wxDataFormat[nFormats]; |
| 509 | |
| 510 | m_dataObject->GetAllFormats(formats, wxDataObject::Set); |
| 511 | |
| 512 | // cycle through all supported formats |
| 513 | size_t n; |
| 514 | for ( n = 0; n < nFormats; n++ ) { |
| 515 | s_fmtMemory.cfFormat = formats[n]; |
| 516 | |
| 517 | // NB: don't use SUCCEEDED macro here: QueryGetData returns S_FALSE |
| 518 | // for file drag and drop (format == CF_HDROP) |
| 519 | if ( pIDataSource->QueryGetData(&s_fmtMemory) == S_OK ) { |
| 520 | format = formats[n]; |
| 521 | |
| 522 | break; |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | if ( formats != &format ) { |
| 527 | // free memory if we allocated it |
| 528 | delete [] formats; |
| 529 | } |
| 530 | |
| 531 | return n < nFormats ? format : wxFormatInvalid; |
| 532 | } |
| 533 | |
| 534 | // ---------------------------------------------------------------------------- |
| 535 | // private functions |
| 536 | // ---------------------------------------------------------------------------- |
| 537 | |
| 538 | static wxDragResult ConvertDragEffectToResult(DWORD dwEffect) |
| 539 | { |
| 540 | switch ( dwEffect ) { |
| 541 | case DROPEFFECT_COPY: |
| 542 | return wxDragCopy; |
| 543 | |
| 544 | case DROPEFFECT_LINK: |
| 545 | return wxDragLink; |
| 546 | |
| 547 | case DROPEFFECT_MOVE: |
| 548 | return wxDragMove; |
| 549 | |
| 550 | default: |
| 551 | wxFAIL_MSG(wxT("invalid value in ConvertDragEffectToResult")); |
| 552 | // fall through |
| 553 | |
| 554 | case DROPEFFECT_NONE: |
| 555 | return wxDragNone; |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | static DWORD ConvertDragResultToEffect(wxDragResult result) |
| 560 | { |
| 561 | switch ( result ) { |
| 562 | case wxDragCopy: |
| 563 | return DROPEFFECT_COPY; |
| 564 | |
| 565 | case wxDragLink: |
| 566 | return DROPEFFECT_LINK; |
| 567 | |
| 568 | case wxDragMove: |
| 569 | return DROPEFFECT_MOVE; |
| 570 | |
| 571 | default: |
| 572 | wxFAIL_MSG(wxT("invalid value in ConvertDragResultToEffect")); |
| 573 | // fall through |
| 574 | |
| 575 | case wxDragNone: |
| 576 | return DROPEFFECT_NONE; |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | #endif // wxUSE_OLE && wxUSE_DRAG_AND_DROP |