QT_ENSURE_STACK_ALIGNED_FOR_SSE STDMETHODIMP
QWindowsOleDropTarget::Drop(LPDATAOBJECT pDataObj, DWORD grfKeyState,
POINTL pt, LPDWORD pdwEffect)
{
if (IDropTargetHelper* dh = QWindowsDrag::instance()->dropHelper())
dh->Drop(pDataObj, reinterpret_cast<POINT*>(&pt), *pdwEffect);
qCDebug(lcQpaMime) << __FUNCTION__ << ' ' << m_window
<< "keys=" << grfKeyState << "pt=" << pt.x << ',' << pt.y;
m_lastPoint = QWindowsGeometryHint::mapFromGlobal(m_window, QPoint(pt.x,pt.y));
// grfKeyState does not all ways contain button state in the drop
QGuiApplicationPrivate::mouse_buttons = toQtMouseButtons(m_lastKeyState);
QGuiApplicationPrivate::modifier_buttons = toQtKeyboardModifiers(grfKeyState);
QWindowsDrag *windowsDrag = QWindowsDrag::instance();
const QPlatformDropQtResponse response =
QWindowSystemInterface::handleDrop(m_window, windowsDrag->dropData(),
m_lastPoint,
translateToQDragDropActions(*pdwEffect));
QGuiApplicationPrivate::mouse_buttons = toQtMouseButtons(grfKeyState);
m_lastKeyState = grfKeyState;
if (response.isAccepted()) {
const Qt::DropAction action = response.acceptedAction();
if (action == Qt::MoveAction || action == Qt::TargetMoveAction) {
if (action == Qt::MoveAction)
m_chosenEffect = DROPEFFECT_MOVE;
else
m_chosenEffect = DROPEFFECT_COPY;
HGLOBAL hData = GlobalAlloc(0, sizeof(DWORD));
if (hData) {
DWORD *moveEffect = reinterpret_cast<DWORD *>(GlobalLock(hData));
*moveEffect = DROPEFFECT_MOVE;
GlobalUnlock(hData);
STGMEDIUM medium;
memset(&medium, 0, sizeof(STGMEDIUM));
medium.tymed = TYMED_HGLOBAL;
medium.hGlobal = hData;
FORMATETC format;
format.cfFormat = CLIPFORMAT(RegisterClipboardFormat(CFSTR_PERFORMEDDROPEFFECT));
format.tymed = TYMED_HGLOBAL;
format.ptd = 0;
format.dwAspect = 1;
format.lindex = -1;
windowsDrag->dropDataObject()->SetData(&format, &medium, true);
}
} else {
m_chosenEffect = translateToWinDragEffects(action);
}
} else {
m_chosenEffect = DROPEFFECT_NONE;
}
*pdwEffect = m_chosenEffect;
windowsDrag->releaseDropDataObject();
return NOERROR;
}
void QWindowsOleDropTarget::handleDrag(QWindow *window, DWORD grfKeyState,
const QPoint &point, LPDWORD pdwEffect)
{
Q_ASSERT(window);
m_lastPoint = point;
m_lastKeyState = grfKeyState;
QWindowsDrag *windowsDrag = QWindowsDrag::instance();
const Qt::DropActions actions = translateToQDragDropActions(*pdwEffect);
QGuiApplicationPrivate::modifier_buttons = toQtKeyboardModifiers(grfKeyState);
QGuiApplicationPrivate::mouse_buttons = toQtMouseButtons(grfKeyState);
const QPlatformDragQtResponse response =
QWindowSystemInterface::handleDrag(window, windowsDrag->dropData(), m_lastPoint, actions);
m_answerRect = response.answerRect();
const Qt::DropAction action = response.acceptedAction();
if (response.isAccepted()) {
m_chosenEffect = translateToWinDragEffects(action);
} else {
m_chosenEffect = DROPEFFECT_NONE;
}
*pdwEffect = m_chosenEffect;
qCDebug(lcQpaMime) << __FUNCTION__ << m_window
<< windowsDrag->dropData() << " supported actions=" << actions
<< " mods=" << QGuiApplicationPrivate::modifier_buttons
<< " mouse=" << QGuiApplicationPrivate::mouse_buttons
<< " accepted: " << response.isAccepted() << action
<< m_answerRect << " effect" << *pdwEffect;
}
bool QDragManager::drag( QDragObject * o, QDragObject::DragMode mode )
{
#ifdef DEBUG_QDND_SRC
qDebug( "QDragManager::drag ( %p, %d )", o, mode );
#endif
if ( object == o || !o || !o->parent() )
return false;
if ( object ) {
cancel();
qApp->removeEventFilter( this );
beingCancelled = false;
}
object = o;
drag_mode = mode;
updatePixmap();
willDrop = FALSE;
#ifndef QT_NO_ACCESSIBILITY
QAccessible::updateAccessibility( this, 0, QAccessible::DragDropStart );
#endif
DWORD dwEffect, dwOKEffect;
QOleDataObject *obj = new QOleDataObject( o );
QOleDropSource *qsrc = new QOleDropSource();
src = o->target();
dwOKEffect = translateToWinDragEffects ( mode );
updateCursor();
#ifdef Q_OS_TEMP
HRESULT r = 0;
resultEffect = 0;
#else
HRESULT r = DoDragDrop( obj, qsrc, dwOKEffect, &dwEffect );
#endif
#ifndef QT_NO_CURSOR
QApplication::restoreOverrideCursor();
restoreCursor = false;
#endif
// clean up
obj->releaseQt();
obj->Release(); // Will delete obj if refcount becomes 0
qsrc->Release(); // Will delete src if refcount becomes 0
object = 0;
#ifndef QT_NO_ACCESSIBILITY
QAccessible::updateAccessibility( this, 0, QAccessible::DragDropEnd );
#endif
return true;
}
Qt::DropAction QWindowsDrag::drag(QDrag *drag)
{
// TODO: Accessibility handling?
QMimeData *dropData = drag->mimeData();
Qt::DropAction dragResult = Qt::IgnoreAction;
DWORD resultEffect;
QWindowsDrag::m_canceled = false;
QWindowsOleDropSource *windowDropSource = new QWindowsOleDropSource(this);
windowDropSource->createCursors();
QWindowsDropDataObject *dropDataObject = new QWindowsDropDataObject(dropData);
const Qt::DropActions possibleActions = drag->supportedActions();
const DWORD allowedEffects = translateToWinDragEffects(possibleActions);
qCDebug(lcQpaMime) << '>' << __FUNCTION__ << "possible Actions=0x"
<< hex << int(possibleActions) << "effects=0x" << allowedEffects << dec;
const HRESULT r = DoDragDrop(dropDataObject, windowDropSource, allowedEffects, &resultEffect);
const DWORD reportedPerformedEffect = dropDataObject->reportedPerformedEffect();
if (r == DRAGDROP_S_DROP) {
if (reportedPerformedEffect == DROPEFFECT_MOVE && resultEffect != DROPEFFECT_MOVE) {
dragResult = Qt::TargetMoveAction;
resultEffect = DROPEFFECT_MOVE;
} else {
dragResult = translateToQDragDropAction(resultEffect);
}
// Force it to be a copy if an unsupported operation occurred.
// This indicates a bug in the drop target.
if (resultEffect != DROPEFFECT_NONE && !(resultEffect & allowedEffects)) {
qWarning("%s: Forcing Qt::CopyAction", __FUNCTION__);
dragResult = Qt::CopyAction;
}
}
// clean up
dropDataObject->releaseQt();
dropDataObject->Release(); // Will delete obj if refcount becomes 0
windowDropSource->Release(); // Will delete src if refcount becomes 0
qCDebug(lcQpaMime) << '<' << __FUNCTION__ << hex << "allowedEffects=0x" << allowedEffects
<< "reportedPerformedEffect=0x" << reportedPerformedEffect
<< " resultEffect=0x" << resultEffect << "hr=0x" << int(r) << dec << "dropAction=" << dragResult;
return dragResult;
}
STDMETHODIMP QOleDropTarget::DragOver( DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect )
{
#ifdef DEBUG_QDND_TGT
qDebug( "QOleDropTarget::DragOver( %d, %d/%d, %d )",
grfKeyState, pt.x, pt.y, *pdwEffect );
qDebug( "widget: %p, winID: %08x", widget, widget ? widget->winId() : 0 );
#endif
if ( !qt_tryModalHelper( widget ) ) {
*pdwEffect = DROPEFFECT_NONE;
return NOERROR;
}
QPoint tmpPoint = widget->mapFromGlobal( QPoint( pt.x, pt.y ) );
// see if we should compress this event
if ( ( tmpPoint == lastPoint || answerRect.contains( tmpPoint ) ) && lastKeyState == grfKeyState ) {
*pdwEffect = choosenEffect;
return NOERROR;
}
lastPoint = tmpPoint;
lastKeyState = grfKeyState;
QDragMoveEvent e( lastPoint );
e.setAction( translateKeyStateToQDropAction( grfKeyState, *pdwEffect ) );
e.accept();
QApplication::sendEvent( widget, &e );
answerRect = e.answerRect();
if ( e.isAccepted() )
choosenEffect = translateToWinDragEffects( e.action() );
else
choosenEffect = DROPEFFECT_NONE;
*pdwEffect = choosenEffect;
return NOERROR;
}
STDMETHODIMP QOleDropTarget::DragEnter( LPDATAOBJECT pIDataSource,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect )
{
#ifdef DEBUG_QDND_TGT
qDebug( "QOleDropTarget::DragEnter( %p, %d, %d/%d, %d )",
pIDataSource, grfKeyState, pt.x, pt.y, *pdwEffect );
qDebug( "widget: %p, winID: %08x", widget, widget ? widget->winId() : 0 );
#endif
if ( !qt_tryModalHelper( widget ) ) {
*pdwEffect = DROPEFFECT_NONE;
return NOERROR;
}
pIDataObject = pIDataSource;
pIDataObject->AddRef();
lastPoint = widget->mapFromGlobal( QPoint( pt.x, pt.y ) );
lastKeyState = grfKeyState;
QDragEnterEvent e( lastPoint );
e.setAction( translateKeyStateToQDropAction( grfKeyState, *pdwEffect ) );
e.accept();
QApplication::sendEvent( widget, &e );
QDragResponseEvent re ( e.isAccepted() );
QApplication::sendEvent( widget, &re );
answerRect = e.answerRect();
if ( e.isAccepted() )
choosenEffect = translateToWinDragEffects( e.action() );
else
choosenEffect = DROPEFFECT_NONE;
*pdwEffect = choosenEffect;
return NOERROR;
}