QT_ENSURE_STACK_ALIGNED_FOR_SSE STDMETHODIMP
QWindowsOleDropSource::GiveFeedback(DWORD dwEffect)
{
const Qt::DropAction action = translateToQDragDropAction(dwEffect);
m_drag->updateAction(action);
const qint64 currentCacheKey = m_drag->currentDrag()->dragCursor(action).cacheKey();
auto it = m_cursors.constFind(action);
// If a custom drag cursor is set, check its cache key to detect changes.
if (it == m_cursors.constEnd() || (currentCacheKey && currentCacheKey != it.value().cacheKey)) {
createCursors();
it = m_cursors.constFind(action);
}
if (it != m_cursors.constEnd()) {
const CursorEntry &e = it.value();
switch (m_mode) {
case MouseDrag:
SetCursor(e.cursor->handle());
break;
case TouchDrag:
if (!m_touchDragWindow)
m_touchDragWindow = new QWindowsDragCursorWindow;
m_touchDragWindow->setPixmap(e.pixmap);
m_touchDragWindow->setFramePosition(QCursor::pos() - e.hotSpot);
if (!m_touchDragWindow->isVisible())
m_touchDragWindow->show();
break;
}
return ResultFromScode(S_OK);
}
return ResultFromScode(DRAGDROP_S_USEDEFAULTCURSORS);
}
void QWindowsOleDropSource::clearCursors()
{
if (!m_cursors.isEmpty()) {
const ActionCursorMap::const_iterator cend = m_cursors.constEnd();
for (ActionCursorMap::const_iterator it = m_cursors.constBegin(); it != cend; ++it)
DestroyCursor(it.value());
m_cursors.clear();
}
}