Qt::DropAction QPlatformDrag::defaultAction(Qt::DropActions possibleActions,
Qt::KeyboardModifiers modifiers) const
{
#ifdef QDND_DEBUG
qDebug("QDragManager::defaultAction(Qt::DropActions possibleActions)");
qDebug("keyboard modifiers : %s", qPrintable(KeyboardModifiersToString(modifiers)));
#endif
Qt::DropAction default_action = Qt::IgnoreAction;
if (currentDrag()) {
default_action = currentDrag()->defaultAction();
}
if (default_action == Qt::IgnoreAction) {
//This means that the drag was initiated by QDrag::start and we need to
//preserve the old behavior
default_action = Qt::CopyAction;
}
if (modifiers & Qt::ControlModifier && modifiers & Qt::ShiftModifier)
default_action = Qt::LinkAction;
else if (modifiers & Qt::ControlModifier)
default_action = Qt::CopyAction;
else if (modifiers & Qt::ShiftModifier)
default_action = Qt::MoveAction;
else if (modifiers & Qt::AltModifier)
default_action = Qt::LinkAction;
#ifdef QDND_DEBUG
qDebug("possible actions : %s", qPrintable(dragActionsToString(possibleActions)));
#endif
// Check if the action determined is allowed
if (!(possibleActions & default_action)) {
if (possibleActions & Qt::CopyAction)
default_action = Qt::CopyAction;
else if (possibleActions & Qt::MoveAction)
default_action = Qt::MoveAction;
else if (possibleActions & Qt::LinkAction)
default_action = Qt::LinkAction;
else
default_action = Qt::IgnoreAction;
}
#ifdef QDND_DEBUG
qDebug("default action : %s", qPrintable(dragActionsToString(default_action)));
#endif
return default_action;
}
void QXcbDrag::drop(const QMouseEvent *event)
{
QBasicDrag::drop(event);
if (!current_target)
return;
xcb_client_message_event_t drop;
drop.response_type = XCB_CLIENT_MESSAGE;
drop.window = current_target;
drop.format = 32;
drop.type = atom(QXcbAtom::XdndDrop);
drop.data.data32[0] = connection()->clipboard()->owner();
drop.data.data32[1] = 0; // flags
drop.data.data32[2] = connection()->time();
drop.data.data32[3] = 0;
drop.data.data32[4] = currentDrag()->supportedActions();
QXcbWindow *w = connection()->platformWindowFromId(current_proxy_target);
if (w && (w->window()->type() == Qt::Desktop) /*&& !w->acceptDrops()*/)
w = 0;
Transaction t = {
connection()->time(),
current_target,
current_proxy_target,
(w ? w->window() : 0),
// current_embeddig_widget,
currentDrag(),
QTime::currentTime()
};
transactions.append(t);
// timer is needed only for drops that came from other processes.
if (!t.targetWindow && cleanup_timer == -1) {
cleanup_timer = startTimer(XdndDropTransactionTimeout);
}
if (w) {
handleDrop(w->window(), &drop);
} else {
xcb_send_event(xcb_connection(), false, current_proxy_target, XCB_EVENT_MASK_NO_EVENT, (const char *)&drop);
}
current_target = 0;
current_proxy_target = 0;
source_time = 0;
// current_embedding_widget = 0;
}
void QPlatformDrag::updateAction(Qt::DropAction action)
{
Q_D(QPlatformDrag);
if (d->cursor_drop_action != action) {
d->cursor_drop_action = action;
emit currentDrag()->actionChanged(action);
}
}
void QXcbDrag::move(const QMouseEvent *me)
{
// The mouse event is in the coordinate system of the window that started the drag.
// We do not know which window that was at this point, so we just use the device pixel ratio
// of the QGuiApplication. This will break once we support screens with different DPR. Fixing
// this properly requires some redesign of the drag and drop architecture.
static const int dpr = int(qApp->devicePixelRatio());
QBasicDrag::move(me);
QPoint globalPos = me->globalPos();
if (source_sameanswer.contains(globalPos) && source_sameanswer.isValid())
return;
const QList<QXcbScreen *> &screens = connection()->screens();
QXcbScreen *screen = connection()->primaryScreen();
for (int i = 0; i < screens.size(); ++i) {
if (screens.at(i)->geometry().contains(globalPos)) {
screen = screens.at(i);
break;
}
}
if (screen != current_screen) {
// ### need to recreate the shaped pixmap window?
// int screen = QCursor::x11Screen();
// if ((qt_xdnd_current_screen == -1 && screen != X11->defaultScreen) || (screen != qt_xdnd_current_screen)) {
// // recreate the pixmap on the new screen...
// delete xdnd_data.deco;
// QWidget* parent = object->source()->window()->x11Info().screen() == screen
// ? object->source()->window() : QApplication::desktop()->screen(screen);
// xdnd_data.deco = new QShapedPixmapWidget(parent);
// if (!QWidget::mouseGrabber()) {
// updatePixmap();
// xdnd_data.deco->grabMouse();
// }
// }
// xdnd_data.deco->move(QCursor::pos() - xdnd_data.deco->pm_hot);
current_screen = screen;
}
// qt_xdnd_current_screen = screen;
xcb_window_t rootwin = current_screen->root();
xcb_translate_coordinates_reply_t *translate =
::translateCoordinates(connection(), rootwin, rootwin, globalPos.x() * dpr, globalPos.y() * dpr);
if (!translate)
return;
xcb_window_t target = translate->child;
int lx = translate->dst_x;
int ly = translate->dst_y;
free (translate);
if (target && target != rootwin) {
xcb_window_t src = rootwin;
while (target != 0) {
DNDDEBUG << "checking target for XdndAware" << target << lx << ly;
// translate coordinates
translate = ::translateCoordinates(connection(), src, target, lx, ly);
if (!translate) {
target = 0;
break;
}
lx = translate->dst_x;
ly = translate->dst_y;
src = target;
xcb_window_t child = translate->child;
free(translate);
// check if it has XdndAware
xcb_get_property_cookie_t cookie = Q_XCB_CALL(xcb_get_property(xcb_connection(), false, target,
atom(QXcbAtom::XdndAware), XCB_GET_PROPERTY_TYPE_ANY, 0, 0));
xcb_get_property_reply_t *reply = xcb_get_property_reply(xcb_connection(), cookie, 0);
bool aware = reply && reply->type != XCB_NONE;
free(reply);
if (aware) {
DNDDEBUG << "Found XdndAware on " << target;
break;
}
target = child;
}
if (!target || target == shapedPixmapWindow()->handle()->winId()) {
DNDDEBUG << "need to find real window";
target = findRealWindow(globalPos, rootwin, 6, true);
if (target == 0)
target = findRealWindow(globalPos, rootwin, 6, false);
DNDDEBUG << "real window found" << target;
}
}
QXcbWindow *w = 0;
if (target) {
w = connection()->platformWindowFromId(target);
if (w && (w->window()->type() == Qt::Desktop) /*&& !w->acceptDrops()*/)
w = 0;
} else {
w = 0;
target = rootwin;
}
xcb_window_t proxy_target = xdndProxy(connection(), target);
if (!proxy_target)
proxy_target = target;
int target_version = 1;
if (proxy_target) {
xcb_get_property_cookie_t cookie = xcb_get_property(xcb_connection(), false, proxy_target,
atom(QXcbAtom::XdndAware), XCB_GET_PROPERTY_TYPE_ANY, 0, 1);
xcb_get_property_reply_t *reply = xcb_get_property_reply(xcb_connection(), cookie, 0);
if (!reply || reply->type == XCB_NONE)
target = 0;
target_version = *(uint32_t *)xcb_get_property_value(reply);
target_version = qMin(xdnd_version, target_version ? target_version : 1);
free(reply);
}
if (target != current_target) {
if (current_target)
send_leave();
current_target = target;
current_proxy_target = proxy_target;
if (target) {
int flags = target_version << 24;
if (drag_types.size() > 3)
flags |= 0x0001;
xcb_client_message_event_t enter;
enter.response_type = XCB_CLIENT_MESSAGE;
enter.window = target;
enter.format = 32;
enter.type = atom(QXcbAtom::XdndEnter);
enter.data.data32[0] = connection()->clipboard()->owner();
enter.data.data32[1] = flags;
enter.data.data32[2] = drag_types.size()>0 ? drag_types.at(0) : 0;
enter.data.data32[3] = drag_types.size()>1 ? drag_types.at(1) : 0;
enter.data.data32[4] = drag_types.size()>2 ? drag_types.at(2) : 0;
// provisionally set the rectangle to 5x5 pixels...
source_sameanswer = QRect(globalPos.x() - 2, globalPos.y() -2 , 5, 5);
DEBUG() << "sending Xdnd enter source=" << enter.data.data32[0];
if (w)
handleEnter(w->window(), &enter);
else if (target)
xcb_send_event(xcb_connection(), false, proxy_target, XCB_EVENT_MASK_NO_EVENT, (const char *)&enter);
waiting_for_status = false;
}
}
if (waiting_for_status)
return;
if (target) {
waiting_for_status = true;
xcb_client_message_event_t move;
move.response_type = XCB_CLIENT_MESSAGE;
move.window = target;
move.format = 32;
move.type = atom(QXcbAtom::XdndPosition);
move.data.data32[0] = connection()->clipboard()->owner();
move.data.data32[1] = 0; // flags
move.data.data32[2] = (globalPos.x() * dpr << 16) + globalPos.y() * dpr;
move.data.data32[3] = connection()->time();
move.data.data32[4] = toXdndAction(defaultAction(currentDrag()->supportedActions(), QGuiApplication::keyboardModifiers()));
DEBUG() << "sending Xdnd position source=" << move.data.data32[0] << "target=" << move.window;
source_time = connection()->time();
if (w)
handle_xdnd_position(w->window(), &move);
else
xcb_send_event(xcb_connection(), false, proxy_target, XCB_EVENT_MASK_NO_EVENT, (const char *)&move);
}
}
QMimeData *QWindowsDrag::dropData()
{
if (const QDrag *drag = currentDrag())
return drag->mimeData();
return &m_dropData;
}