source: trunk/src/gui/kernel/qdnd_win.cpp@ 561

Last change on this file since 561 was 561, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.6.1 sources.
File size: 29.6 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtGui module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "qapplication.h"
43
44#include "qapplication_p.h"
45#include "qevent.h"
46#include "qpainter.h"
47#include "qwidget.h"
48#include "qbuffer.h"
49#include "qdatastream.h"
50#include "qcursor.h"
51#include "qt_windows.h"
52#include <shlobj.h>
53#ifndef QT_NO_ACCESSIBILITY
54#include "qaccessible.h"
55#endif
56#include "qdnd_p.h"
57#include "qdebug.h"
58
59#if defined(Q_OS_WINCE)
60#include "qguifunctions_wince.h"
61#endif
62
63// support for xbuttons
64#ifndef MK_XBUTTON1
65#define MK_XBUTTON1 0x0020
66#define MK_XBUTTON2 0x0040
67#endif
68
69QT_BEGIN_NAMESPACE
70
71#if !(defined(QT_NO_DRAGANDDROP) && defined(QT_NO_CLIPBOARD))
72
73//---------------------------------------------------------------------
74// QOleDataObject Constructor
75//---------------------------------------------------------------------
76
77QOleDataObject::QOleDataObject(QMimeData *mimeData)
78{
79 m_refs = 1;
80 data = mimeData;
81 CF_PERFORMEDDROPEFFECT = RegisterClipboardFormat(CFSTR_PERFORMEDDROPEFFECT);
82 performedEffect = DROPEFFECT_NONE;
83}
84
85QOleDataObject::~QOleDataObject()
86{
87}
88
89void QOleDataObject::releaseQt()
90{
91 data = 0;
92}
93
94const QMimeData *QOleDataObject::mimeData() const
95{
96 return data;
97}
98
99DWORD QOleDataObject::reportedPerformedEffect() const
100{
101 return performedEffect;
102}
103
104//---------------------------------------------------------------------
105// IUnknown Methods
106//---------------------------------------------------------------------
107
108STDMETHODIMP
109QOleDataObject::QueryInterface(REFIID iid, void FAR* FAR* ppv)
110{
111 if (iid == IID_IUnknown || iid == IID_IDataObject) {
112 *ppv = this;
113 AddRef();
114 return NOERROR;
115 }
116 *ppv = NULL;
117 return ResultFromScode(E_NOINTERFACE);
118}
119
120STDMETHODIMP_(ULONG)
121QOleDataObject::AddRef(void)
122{
123 return ++m_refs;
124}
125
126STDMETHODIMP_(ULONG)
127QOleDataObject::Release(void)
128{
129 if (--m_refs == 0) {
130 releaseQt();
131 delete this;
132 return 0;
133 }
134 return m_refs;
135}
136
137//---------------------------------------------------------------------
138// IDataObject Methods
139//
140// The following methods are NOT supported for data transfer using the
141// clipboard or drag-drop:
142//
143// IDataObject::SetData -- return E_NOTIMPL
144// IDataObject::DAdvise -- return OLE_E_ADVISENOTSUPPORTED
145// ::DUnadvise
146// ::EnumDAdvise
147// IDataObject::GetCanonicalFormatEtc -- return E_NOTIMPL
148// (NOTE: must set pformatetcOut->ptd = NULL)
149//---------------------------------------------------------------------
150
151STDMETHODIMP
152QOleDataObject::GetData(LPFORMATETC pformatetc, LPSTGMEDIUM pmedium)
153{
154#ifdef QDND_DEBUG
155 qDebug("QOleDataObject::GetData(LPFORMATETC pformatetc, LPSTGMEDIUM pmedium)");
156#ifndef Q_OS_WINCE
157 wchar_t buf[256] = {0};
158 GetClipboardFormatName(pformatetc->cfFormat, buf, 255);
159 qDebug("CF = %d : %s", pformatetc->cfFormat, QString::fromWCharArray(buf));
160#endif
161#endif
162
163 if (!data)
164 return ResultFromScode(DATA_E_FORMATETC);
165
166 QWindowsMime *converter = QWindowsMime::converterFromMime(*pformatetc, data);
167
168 if (converter && converter->convertFromMime(*pformatetc, data, pmedium))
169 return ResultFromScode(S_OK);
170 else
171 return ResultFromScode(DATA_E_FORMATETC);
172}
173
174STDMETHODIMP
175QOleDataObject::GetDataHere(LPFORMATETC, LPSTGMEDIUM)
176{
177 return ResultFromScode(DATA_E_FORMATETC);
178}
179
180STDMETHODIMP
181QOleDataObject::QueryGetData(LPFORMATETC pformatetc)
182{
183#ifdef QDND_DEBUG
184 qDebug("QOleDataObject::QueryGetData(LPFORMATETC pformatetc)");
185#endif
186
187 if (!data)
188 return ResultFromScode(DATA_E_FORMATETC);
189
190 if (QWindowsMime::converterFromMime(*pformatetc, data))
191 return ResultFromScode(S_OK);
192 return ResultFromScode(S_FALSE);
193}
194
195STDMETHODIMP
196QOleDataObject::GetCanonicalFormatEtc(LPFORMATETC, LPFORMATETC pformatetcOut)
197{
198 pformatetcOut->ptd = NULL;
199 return ResultFromScode(E_NOTIMPL);
200}
201
202STDMETHODIMP
203QOleDataObject::SetData(LPFORMATETC pFormatetc, STGMEDIUM *pMedium, BOOL fRelease)
204{
205 if (pFormatetc->cfFormat == CF_PERFORMEDDROPEFFECT && pMedium->tymed == TYMED_HGLOBAL) {
206 DWORD * val = (DWORD*)GlobalLock(pMedium->hGlobal);
207 performedEffect = *val;
208 GlobalUnlock(pMedium->hGlobal);
209 if (fRelease)
210 ReleaseStgMedium(pMedium);
211 return ResultFromScode(S_OK);
212 }
213 return ResultFromScode(E_NOTIMPL);
214}
215
216
217STDMETHODIMP
218QOleDataObject::EnumFormatEtc(DWORD dwDirection, LPENUMFORMATETC FAR* ppenumFormatEtc)
219{
220#ifdef QDND_DEBUG
221 qDebug("QOleDataObject::EnumFormatEtc(DWORD dwDirection, LPENUMFORMATETC FAR* ppenumFormatEtc)");
222#endif
223
224 if (!data)
225 return ResultFromScode(DATA_E_FORMATETC);
226
227 SCODE sc = S_OK;
228
229 QVector<FORMATETC> fmtetcs;
230 if (dwDirection == DATADIR_GET) {
231 fmtetcs = QWindowsMime::allFormatsForMime(data);
232 } else {
233 FORMATETC formatetc;
234 formatetc.cfFormat = CF_PERFORMEDDROPEFFECT;
235 formatetc.dwAspect = DVASPECT_CONTENT;
236 formatetc.lindex = -1;
237 formatetc.ptd = NULL;
238 formatetc.tymed = TYMED_HGLOBAL;
239 fmtetcs.append(formatetc);
240 }
241
242 QOleEnumFmtEtc *enumFmtEtc = new QOleEnumFmtEtc(fmtetcs);
243 *ppenumFormatEtc = enumFmtEtc;
244 if (enumFmtEtc->isNull()) {
245 delete enumFmtEtc;
246 *ppenumFormatEtc = NULL;
247 sc = E_OUTOFMEMORY;
248 }
249
250 return ResultFromScode(sc);
251}
252
253STDMETHODIMP
254QOleDataObject::DAdvise(FORMATETC FAR*, DWORD,
255 LPADVISESINK, DWORD FAR*)
256{
257 return ResultFromScode(OLE_E_ADVISENOTSUPPORTED);
258}
259
260
261STDMETHODIMP
262QOleDataObject::DUnadvise(DWORD)
263{
264 return ResultFromScode(OLE_E_ADVISENOTSUPPORTED);
265}
266
267STDMETHODIMP
268QOleDataObject::EnumDAdvise(LPENUMSTATDATA FAR*)
269{
270 return ResultFromScode(OLE_E_ADVISENOTSUPPORTED);
271}
272
273#endif // QT_NO_DRAGANDDROP && QT_NO_CLIPBOARD
274
275#ifndef QT_NO_DRAGANDDROP
276
277//#define QDND_DEBUG
278
279#ifdef QDND_DEBUG
280extern QString dragActionsToString(Qt::DropActions actions);
281#endif
282
283Qt::DropActions translateToQDragDropActions(DWORD pdwEffects)
284{
285 Qt::DropActions actions = Qt::IgnoreAction;
286 if (pdwEffects & DROPEFFECT_LINK)
287 actions |= Qt::LinkAction;
288 if (pdwEffects & DROPEFFECT_COPY)
289 actions |= Qt::CopyAction;
290 if (pdwEffects & DROPEFFECT_MOVE)
291 actions |= Qt::MoveAction;
292 return actions;
293}
294
295Qt::DropAction translateToQDragDropAction(DWORD pdwEffect)
296{
297 if (pdwEffect & DROPEFFECT_LINK)
298 return Qt::LinkAction;
299 if (pdwEffect & DROPEFFECT_COPY)
300 return Qt::CopyAction;
301 if (pdwEffect & DROPEFFECT_MOVE)
302 return Qt::MoveAction;
303 return Qt::IgnoreAction;
304}
305
306DWORD translateToWinDragEffects(Qt::DropActions action)
307{
308 DWORD effect = DROPEFFECT_NONE;
309 if (action & Qt::LinkAction)
310 effect |= DROPEFFECT_LINK;
311 if (action & Qt::CopyAction)
312 effect |= DROPEFFECT_COPY;
313 if (action & Qt::MoveAction)
314 effect |= DROPEFFECT_MOVE;
315 return effect;
316}
317
318Qt::KeyboardModifiers toQtKeyboardModifiers(DWORD keyState)
319{
320 Qt::KeyboardModifiers modifiers = Qt::NoModifier;
321
322 if (keyState & MK_SHIFT)
323 modifiers |= Qt::ShiftModifier;
324 if (keyState & MK_CONTROL)
325 modifiers |= Qt::ControlModifier;
326 if (keyState & MK_ALT)
327 modifiers |= Qt::AltModifier;
328
329 return modifiers;
330}
331
332Qt::MouseButtons toQtMouseButtons(DWORD keyState)
333{
334 Qt::MouseButtons buttons = Qt::NoButton;
335
336 if (keyState & MK_LBUTTON)
337 buttons |= Qt::LeftButton;
338 if (keyState & MK_RBUTTON)
339 buttons |= Qt::RightButton;
340 if (keyState & MK_MBUTTON)
341 buttons |= Qt::MidButton;
342
343 return buttons;
344}
345
346class QOleDropSource : public IDropSource
347{
348public:
349 QOleDropSource();
350 virtual ~QOleDropSource();
351
352 void createCursors();
353
354 // IUnknown methods
355 STDMETHOD(QueryInterface)(REFIID riid, void ** ppvObj);
356 STDMETHOD_(ULONG,AddRef)(void);
357 STDMETHOD_(ULONG,Release)(void);
358
359 // IDropSource methods
360 STDMETHOD(QueryContinueDrag)(BOOL fEscapePressed, DWORD grfKeyState);
361 STDMETHOD(GiveFeedback)(DWORD dwEffect);
362
363private:
364 Qt::MouseButtons currentButtons;
365 Qt::DropAction currentAction;
366 QMap <Qt::DropAction, QCursor> cursors;
367
368 ULONG m_refs;
369};
370
371
372QOleDropSource::QOleDropSource()
373{
374 currentButtons = Qt::NoButton;
375 m_refs = 1;
376 currentAction = Qt::IgnoreAction;
377}
378
379QOleDropSource::~QOleDropSource()
380{
381}
382
383void QOleDropSource::createCursors()
384{
385 QDragManager *manager = QDragManager::self();
386 if (manager && manager->object
387 && (!manager->object->pixmap().isNull()
388 || manager->hasCustomDragCursors())) {
389 QPixmap pm = manager->object->pixmap();
390 QList<Qt::DropAction> actions;
391 actions << Qt::MoveAction << Qt::CopyAction << Qt::LinkAction;
392 if (!manager->object->pixmap().isNull())
393 actions << Qt::IgnoreAction;
394 QPoint hotSpot = manager->object->hotSpot();
395 for (int cnum = 0; cnum < actions.size(); ++cnum) {
396 QPixmap cpm = manager->dragCursor(actions.at(cnum));
397 int w = cpm.width();
398 int h = cpm.height();
399
400 if (!pm.isNull()) {
401 int x1 = qMin(-hotSpot.x(), 0);
402 int x2 = qMax(pm.width() - hotSpot.x(), cpm.width());
403 int y1 = qMin(-hotSpot.y(), 0);
404 int y2 = qMax(pm.height() - hotSpot.y(), cpm.height());
405
406 w = x2 - x1 + 1;
407 h = y2 - y1 + 1;
408 }
409
410 QRect srcRect = pm.rect();
411 QPoint pmDest = QPoint(qMax(0, -hotSpot.x()), qMax(0, -hotSpot.y()));
412 QPoint newHotSpot = hotSpot;
413
414#if defined(Q_OS_WINCE)
415 // Limited cursor size
416 int reqw = GetSystemMetrics(SM_CXCURSOR);
417 int reqh = GetSystemMetrics(SM_CYCURSOR);
418
419 QPoint hotspotInPM = newHotSpot - pmDest;
420 if (reqw < w) {
421 // Not wide enough - move objectpm right
422 qreal r = qreal(newHotSpot.x()) / w;
423 newHotSpot = QPoint(int(r * reqw), newHotSpot.y());
424 if (newHotSpot.x() + cpm.width() > reqw)
425 newHotSpot.setX(reqw - cpm.width());
426
427 srcRect = QRect(QPoint(hotspotInPM.x() - newHotSpot.x(), srcRect.top()), QSize(reqw, srcRect.height()));
428 }
429 if (reqh < h) {
430 qreal r = qreal(newHotSpot.y()) / h;
431 newHotSpot = QPoint(newHotSpot.x(), int(r * reqh));
432 if (newHotSpot.y() + cpm.height() > reqh)
433 newHotSpot.setY(reqh - cpm.height());
434
435 srcRect = QRect(QPoint(srcRect.left(), hotspotInPM.y() - newHotSpot.y()), QSize(srcRect.width(), reqh));
436 }
437 // Always use system cursor size
438 w = reqw;
439 h = reqh;
440#endif
441
442 QPixmap newCursor(w, h);
443 if (!pm.isNull()) {
444 newCursor.fill(QColor(0, 0, 0, 0));
445 QPainter p(&newCursor);
446 p.drawPixmap(pmDest, pm, srcRect);
447 p.drawPixmap(qMax(0,newHotSpot.x()),qMax(0,newHotSpot.y()),cpm);
448 } else {
449 newCursor = cpm;
450 }
451
452#ifndef QT_NO_CURSOR
453 cursors[actions.at(cnum)] = QCursor(newCursor, pm.isNull() ? 0 : qMax(0,newHotSpot.x()),
454 pm.isNull() ? 0 : qMax(0,newHotSpot.y()));
455#endif
456 }
457 }
458}
459
460
461
462//---------------------------------------------------------------------
463// IUnknown Methods
464//---------------------------------------------------------------------
465
466
467STDMETHODIMP
468QOleDropSource::QueryInterface(REFIID iid, void FAR* FAR* ppv)
469{
470 if(iid == IID_IUnknown || iid == IID_IDropSource)
471 {
472 *ppv = this;
473 ++m_refs;
474 return NOERROR;
475 }
476 *ppv = NULL;
477 return ResultFromScode(E_NOINTERFACE);
478}
479
480
481STDMETHODIMP_(ULONG)
482QOleDropSource::AddRef(void)
483{
484 return ++m_refs;
485}
486
487
488STDMETHODIMP_(ULONG)
489QOleDropSource::Release(void)
490{
491 if(--m_refs == 0)
492 {
493 delete this;
494 return 0;
495 }
496 return m_refs;
497}
498
499static inline Qt::MouseButtons keystate_to_mousebutton(DWORD grfKeyState)
500{
501 Qt::MouseButtons result;
502 if (grfKeyState & MK_LBUTTON)
503 result |= Qt::LeftButton;
504 if (grfKeyState & MK_MBUTTON)
505 result |= Qt::MidButton;
506 if (grfKeyState & MK_RBUTTON)
507 result |= Qt::RightButton;
508 if (grfKeyState & MK_XBUTTON1)
509 result |= Qt::XButton1;
510 if (grfKeyState & MK_XBUTTON2)
511 result |= Qt::XButton2;
512 return result;
513}
514
515//---------------------------------------------------------------------
516// IDropSource Methods
517//---------------------------------------------------------------------
518STDMETHODIMP
519QOleDropSource::QueryContinueDrag(BOOL fEscapePressed, DWORD grfKeyState)
520{
521#ifdef QDND_DEBUG
522 qDebug("QOleDropSource::QueryContinueDrag(fEscapePressed %d, grfKeyState %d)", fEscapePressed, grfKeyState);
523#endif
524
525 if (fEscapePressed) {
526 return ResultFromScode(DRAGDROP_S_CANCEL);
527 } else if (!(grfKeyState & (MK_LBUTTON|MK_MBUTTON|MK_RBUTTON))) {
528 return ResultFromScode(DRAGDROP_S_DROP);
529 } else {
530#if defined(Q_OS_WINCE)
531 // grfKeyState is broken on CE, therefore need to check
532 // the state manually
533 if ((GetAsyncKeyState(VK_LBUTTON) == 0) &&
534 (GetAsyncKeyState(VK_MBUTTON) == 0) &&
535 (GetAsyncKeyState(VK_RBUTTON) == 0)) {
536 return ResultFromScode(DRAGDROP_S_DROP);
537 }
538#else
539 if (currentButtons == Qt::NoButton) {
540 currentButtons = keystate_to_mousebutton(grfKeyState);
541 } else {
542 Qt::MouseButtons buttons = keystate_to_mousebutton(grfKeyState);
543 if (!(currentButtons & buttons))
544 return ResultFromScode(DRAGDROP_S_DROP);
545 }
546#endif
547 QApplication::processEvents();
548 return NOERROR;
549 }
550}
551
552STDMETHODIMP
553QOleDropSource::GiveFeedback(DWORD dwEffect)
554{
555 Qt::DropAction action = translateToQDragDropAction(dwEffect);
556
557#ifdef QDND_DEBUG
558 qDebug("QOleDropSource::GiveFeedback(DWORD dwEffect)");
559 qDebug("dwEffect = %s", dragActionsToString(action).toLatin1().data());
560#endif
561
562 if (currentAction != action) {
563 currentAction = action;
564 QDragManager::self()->emitActionChanged(currentAction);
565 }
566
567 if (cursors.contains(currentAction)) {
568#ifndef QT_NO_CURSOR
569 SetCursor(cursors[currentAction].handle());
570#endif
571 return ResultFromScode(S_OK);
572 }
573
574 return ResultFromScode(DRAGDROP_S_USEDEFAULTCURSORS);
575}
576
577//---------------------------------------------------------------------
578// QOleDropTarget
579//---------------------------------------------------------------------
580
581QOleDropTarget::QOleDropTarget(QWidget* w)
582: widget(w)
583{
584 m_refs = 1;
585}
586
587void QOleDropTarget::releaseQt()
588{
589 widget = 0;
590}
591
592//---------------------------------------------------------------------
593// IUnknown Methods
594//---------------------------------------------------------------------
595
596
597STDMETHODIMP
598QOleDropTarget::QueryInterface(REFIID iid, void FAR* FAR* ppv)
599{
600 if(iid == IID_IUnknown || iid == IID_IDropTarget)
601 {
602 *ppv = this;
603 AddRef();
604 return NOERROR;
605 }
606 *ppv = NULL;
607 return ResultFromScode(E_NOINTERFACE);
608}
609
610
611STDMETHODIMP_(ULONG)
612QOleDropTarget::AddRef(void)
613{
614 return ++m_refs;
615}
616
617
618STDMETHODIMP_(ULONG)
619QOleDropTarget::Release(void)
620{
621 if(--m_refs == 0)
622 {
623 delete this;
624 return 0;
625 }
626 return m_refs;
627}
628
629//---------------------------------------------------------------------
630// IDropTarget Methods
631//---------------------------------------------------------------------
632
633STDMETHODIMP
634QOleDropTarget::DragEnter(LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect)
635{
636#ifdef QDND_DEBUG
637 qDebug("QOleDropTarget::DragEnter(LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect)");
638#endif
639
640 if (!QApplicationPrivate::tryModalHelper(widget)) {
641 *pdwEffect = DROPEFFECT_NONE;
642 return NOERROR;
643 }
644
645 QDragManager *manager = QDragManager::self();
646 manager->dropData->currentDataObject = pDataObj;
647 manager->dropData->currentDataObject->AddRef();
648 sendDragEnterEvent(widget, grfKeyState, pt, pdwEffect);
649 *pdwEffect = chosenEffect;
650
651 return NOERROR;
652}
653
654void QOleDropTarget::sendDragEnterEvent(QWidget *dragEnterWidget, DWORD grfKeyState,
655 POINTL pt, LPDWORD pdwEffect)
656{
657 Q_ASSERT(dragEnterWidget);
658 lastPoint = dragEnterWidget->mapFromGlobal(QPoint(pt.x,pt.y));
659 lastKeyState = grfKeyState;
660
661 chosenEffect = DROPEFFECT_NONE;
662 currentWidget = dragEnterWidget;
663
664 QDragManager *manager = QDragManager::self();
665 QMimeData * md = manager->source() ? manager->dragPrivate()->data : manager->dropData;
666 QDragEnterEvent enterEvent(lastPoint, translateToQDragDropActions(*pdwEffect), md,
667 toQtMouseButtons(grfKeyState), toQtKeyboardModifiers(grfKeyState));
668 QApplication::sendEvent(dragEnterWidget, &enterEvent);
669 answerRect = enterEvent.answerRect();
670
671 if (enterEvent.isAccepted()) {
672 chosenEffect = translateToWinDragEffects(enterEvent.dropAction());
673 }
674
675 // Documentation states that a drag move event is sendt immidiatly after
676 // a drag enter event. This will honor widgets overriding dragMoveEvent only:
677 if (enterEvent.isAccepted()) {
678 QDragMoveEvent moveEvent(lastPoint, translateToQDragDropActions(*pdwEffect), md,
679 toQtMouseButtons(grfKeyState), toQtKeyboardModifiers(grfKeyState));
680 answerRect = enterEvent.answerRect();
681 moveEvent.setDropAction(enterEvent.dropAction());
682 moveEvent.accept(); // accept by default, since enter event was accepted.
683
684 QApplication::sendEvent(dragEnterWidget, &moveEvent);
685 if (moveEvent.isAccepted()) {
686 answerRect = moveEvent.answerRect();
687 chosenEffect = translateToWinDragEffects(moveEvent.dropAction());
688 } else {
689 chosenEffect = DROPEFFECT_NONE;
690 }
691 }
692
693}
694
695STDMETHODIMP
696QOleDropTarget::DragOver(DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect)
697{
698#ifdef QDND_DEBUG
699 qDebug("QOleDropTarget::DragOver(grfKeyState %d, pt (%d,%d), pdwEffect %d)", grfKeyState, pt.x, pt.y, pdwEffect);
700#endif
701
702 QWidget *dragOverWidget = widget->childAt(widget->mapFromGlobal(QPoint(pt.x, pt.y)));
703 if (!dragOverWidget)
704 dragOverWidget = widget;
705
706
707 if (!QApplicationPrivate::tryModalHelper(dragOverWidget)
708 || !dragOverWidget->testAttribute(Qt::WA_DropSiteRegistered)) {
709 *pdwEffect = DROPEFFECT_NONE;
710 return NOERROR;
711 }
712
713 QPoint tmpPoint = dragOverWidget->mapFromGlobal(QPoint(pt.x, pt.y));
714 // see if we should compress this event
715 if ((tmpPoint == lastPoint || answerRect.contains(tmpPoint)) && lastKeyState == grfKeyState) {
716 *pdwEffect = chosenEffect;
717 return NOERROR;
718 }
719
720 if (!dragOverWidget->internalWinId() && dragOverWidget != currentWidget) {
721 QPointer<QWidget> dragOverWidgetGuard(dragOverWidget);
722 // Send drag leave event to the previous drag widget.
723 QDragLeaveEvent dragLeave;
724 if (currentWidget)
725 QApplication::sendEvent(currentWidget, &dragLeave);
726 if (!dragOverWidgetGuard) {
727 dragOverWidget = widget->childAt(widget->mapFromGlobal(QPoint(pt.x, pt.y)));
728 if (!dragOverWidget)
729 dragOverWidget = widget;
730 }
731 // Send drag enter event to the current drag widget.
732 sendDragEnterEvent(dragOverWidget, grfKeyState, pt, pdwEffect);
733 }
734
735 QDragManager *manager = QDragManager::self();
736 QMimeData *md = manager->source() ? manager->dragPrivate()->data : manager->dropData;
737
738 QDragMoveEvent oldEvent(lastPoint, translateToQDragDropActions(*pdwEffect), md,
739 toQtMouseButtons(lastKeyState), toQtKeyboardModifiers(lastKeyState));
740
741
742 lastPoint = tmpPoint;
743 lastKeyState = grfKeyState;
744
745 QDragMoveEvent e(lastPoint, translateToQDragDropActions(*pdwEffect), md,
746 toQtMouseButtons(grfKeyState), toQtKeyboardModifiers(grfKeyState));
747 if (chosenEffect != DROPEFFECT_NONE) {
748 if (oldEvent.dropAction() == e.dropAction() &&
749 oldEvent.keyboardModifiers() == e.keyboardModifiers())
750 e.setDropAction(translateToQDragDropAction(chosenEffect));
751 e.accept();
752 }
753 QApplication::sendEvent(dragOverWidget, &e);
754
755 answerRect = e.answerRect();
756 if (e.isAccepted())
757 chosenEffect = translateToWinDragEffects(e.dropAction());
758 else
759 chosenEffect = DROPEFFECT_NONE;
760 *pdwEffect = chosenEffect;
761
762 return NOERROR;
763}
764
765STDMETHODIMP
766QOleDropTarget::DragLeave()
767{
768#ifdef QDND_DEBUG
769 qDebug("QOleDropTarget::DragLeave()");
770#endif
771
772 if (!QApplicationPrivate::tryModalHelper(widget)) {
773 return NOERROR;
774 }
775
776 currentWidget = 0;
777 QDragLeaveEvent e;
778 QApplication::sendEvent(widget, &e);
779
780 QDragManager *manager = QDragManager::self();
781
782 if (manager->dropData->currentDataObject) { // Sanity
783 manager->dropData->currentDataObject->Release();
784 manager->dropData->currentDataObject = 0;
785 }
786
787 return NOERROR;
788}
789
790#define KEY_STATE_BUTTON_MASK (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)
791
792STDMETHODIMP
793QOleDropTarget::Drop(LPDATAOBJECT /*pDataObj*/, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect)
794{
795#ifdef QDND_DEBUG
796 qDebug("QOleDropTarget::Drop(LPDATAOBJECT /*pDataObj*/, grfKeyState %d, POINTL pt, LPDWORD pdwEffect)", grfKeyState);
797#endif
798
799 QWidget *dropWidget = widget->childAt(widget->mapFromGlobal(QPoint(pt.x, pt.y)));
800 if (!dropWidget)
801 dropWidget = widget;
802
803 if (!QApplicationPrivate::tryModalHelper(dropWidget)
804 || !dropWidget->testAttribute(Qt::WA_DropSiteRegistered)) {
805 *pdwEffect = DROPEFFECT_NONE;
806 return NOERROR;
807 }
808
809 lastPoint = dropWidget->mapFromGlobal(QPoint(pt.x,pt.y));
810 // grfKeyState does not all ways contain button state in the drop so if
811 // it doesn't then use the last known button state;
812 if ((grfKeyState & KEY_STATE_BUTTON_MASK) == 0)
813 grfKeyState |= lastKeyState & KEY_STATE_BUTTON_MASK;
814 lastKeyState = grfKeyState;
815
816 QDragManager *manager = QDragManager::self();
817 QMimeData *md = manager->source() ? manager->dragPrivate()->data : manager->dropData;
818 QDropEvent e(lastPoint, translateToQDragDropActions(*pdwEffect), md,
819 toQtMouseButtons(grfKeyState), toQtKeyboardModifiers(grfKeyState));
820 if (chosenEffect != DROPEFFECT_NONE) {
821 e.setDropAction(translateToQDragDropAction(chosenEffect));
822 }
823 QApplication::sendEvent(dropWidget, &e);
824
825 if (chosenEffect != DROPEFFECT_NONE) {
826 e.accept();
827 }
828
829
830 if (e.isAccepted()) {
831 if (e.dropAction() == Qt::MoveAction || e.dropAction() == Qt::TargetMoveAction) {
832 if (e.dropAction() == Qt::MoveAction)
833 chosenEffect = DROPEFFECT_MOVE;
834 else
835 chosenEffect = DROPEFFECT_COPY;
836 HGLOBAL hData = GlobalAlloc(0, sizeof(DWORD));
837 if (hData) {
838 DWORD *moveEffect = (DWORD *)GlobalLock(hData);;
839 *moveEffect = DROPEFFECT_MOVE;
840 GlobalUnlock(hData);
841 STGMEDIUM medium;
842 memset(&medium, 0, sizeof(STGMEDIUM));
843 medium.tymed = TYMED_HGLOBAL;
844 medium.hGlobal = hData;
845 FORMATETC format;
846 format.cfFormat = RegisterClipboardFormat(CFSTR_PERFORMEDDROPEFFECT);
847 format.tymed = TYMED_HGLOBAL;
848 format.ptd = 0;
849 format.dwAspect = 1;
850 format.lindex = -1;
851 manager->dropData->currentDataObject->SetData(&format, &medium, true);
852 }
853 } else {
854 chosenEffect = translateToWinDragEffects(e.dropAction());
855 }
856 } else {
857 chosenEffect = DROPEFFECT_NONE;
858 }
859 *pdwEffect = chosenEffect;
860
861
862 if (manager->dropData->currentDataObject) {
863 manager->dropData->currentDataObject->Release();
864 manager->dropData->currentDataObject = 0;
865 }
866
867 return NOERROR;
868
869 // We won't get any mouserelease-event, so manually adjust qApp state:
870///### test this QApplication::winMouseButtonUp();
871}
872
873//---------------------------------------------------------------------
874// QDropData
875//---------------------------------------------------------------------
876
877bool QDropData::hasFormat_sys(const QString &mimeType) const
878{
879 if (!currentDataObject) // Sanity
880 return false;
881
882 return QWindowsMime::converterToMime(mimeType, currentDataObject) != 0;
883}
884
885QStringList QDropData::formats_sys() const
886{
887 QStringList fmts;
888 if (!currentDataObject) // Sanity
889 return fmts;
890
891 fmts = QWindowsMime::allMimesForFormats(currentDataObject);
892
893 return fmts;
894}
895
896QVariant QDropData::retrieveData_sys(const QString &mimeType, QVariant::Type type) const
897{
898 QVariant result;
899
900 if (!currentDataObject) // Sanity
901 return result;
902
903 QWindowsMime *converter = QWindowsMime::converterToMime(mimeType, currentDataObject);
904
905 if (converter)
906 result = converter->convertToMime(mimeType, currentDataObject, type);
907
908 return result;
909}
910
911Qt::DropAction QDragManager::drag(QDrag *o)
912
913{
914#ifdef QDND_DEBUG
915 qDebug("QDragManager::drag(QDrag *drag)");
916#endif
917
918 if (object == o || !o || !o->d_func()->source)
919 return Qt::IgnoreAction;
920
921 if (object) {
922 cancel();
923 qApp->removeEventFilter(this);
924 beingCancelled = false;
925 }
926
927 object = o;
928
929#ifdef QDND_DEBUG
930 qDebug("actions = %s", dragActionsToString(dragPrivate()->possible_actions).toLatin1().data());
931#endif
932
933 dragPrivate()->target = 0;
934
935#ifndef QT_NO_ACCESSIBILITY
936 QAccessible::updateAccessibility(this, 0, QAccessible::DragDropStart);
937#endif
938
939 DWORD resultEffect;
940 QOleDropSource *src = new QOleDropSource();
941 src->createCursors();
942 QOleDataObject *obj = new QOleDataObject(o->mimeData());
943 DWORD allowedEffects = translateToWinDragEffects(dragPrivate()->possible_actions);
944
945#if !defined(Q_OS_WINCE) || defined(GWES_ICONCURS)
946 HRESULT r = DoDragDrop(obj, src, allowedEffects, &resultEffect);
947#else
948 HRESULT r = DRAGDROP_S_CANCEL;
949 resultEffect = DROPEFFECT_MOVE;
950#endif
951
952 Qt::DropAction ret = Qt::IgnoreAction;
953 if (r == DRAGDROP_S_DROP) {
954 if (obj->reportedPerformedEffect() == DROPEFFECT_MOVE && resultEffect != DROPEFFECT_MOVE) {
955 ret = Qt::TargetMoveAction;
956 resultEffect = DROPEFFECT_MOVE;
957 } else {
958 ret = translateToQDragDropAction(resultEffect);
959 }
960 // Force it to be a copy if an unsupported operation occurred.
961 // This indicates a bug in the drop target.
962 if (resultEffect != DROPEFFECT_NONE && !(resultEffect & allowedEffects))
963 ret = Qt::CopyAction;
964 } else {
965 dragPrivate()->target = 0;
966 }
967
968 // clean up
969 obj->releaseQt();
970 obj->Release(); // Will delete obj if refcount becomes 0
971 src->Release(); // Will delete src if refcount becomes 0
972 object = 0;
973 o->setMimeData(0);
974 o->deleteLater();
975
976#ifndef QT_NO_ACCESSIBILITY
977 QAccessible::updateAccessibility(this, 0, QAccessible::DragDropEnd);
978#endif
979
980 return ret;
981}
982
983void QDragManager::cancel(bool /* deleteSource */)
984{
985 if (object) {
986 beingCancelled = true;
987 object = 0;
988 }
989
990#ifndef QT_NO_CURSOR
991 // insert cancel code here ######## todo
992
993 if (restoreCursor) {
994 QApplication::restoreOverrideCursor();
995 restoreCursor = false;
996 }
997#endif
998#ifndef QT_NO_ACCESSIBILITY
999 QAccessible::updateAccessibility(this, 0, QAccessible::DragDropEnd);
1000#endif
1001}
1002
1003void QDragManager::updatePixmap()
1004{
1005 // not used in windows implementation
1006}
1007
1008bool QDragManager::eventFilter(QObject *, QEvent *)
1009{
1010 // not used in windows implementation
1011 return false;
1012}
1013
1014void QDragManager::timerEvent(QTimerEvent*)
1015{
1016 // not used in windows implementation
1017}
1018
1019void QDragManager::move(const QPoint &)
1020{
1021 // not used in windows implementation
1022}
1023
1024void QDragManager::drop()
1025{
1026 // not used in windows implementation
1027}
1028
1029QT_END_NAMESPACE
1030
1031#endif // QT_NO_DRAGANDDROP
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