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;
}
Qt::DropAction QDragManager::defaultAction(Qt::DropActions possibleActions,
Qt::KeyboardModifiers modifiers) const
{
#ifdef QDND_DEBUG
qDebug("QDragManager::defaultAction(Qt::DropActions possibleActions)");
qDebug("keyboard modifiers : %s", KeyboardModifiersToString(modifiers).latin1());
#endif
QDragPrivate *d = dragPrivate();
Qt::DropAction defaultAction = d ? d->defaultDropAction : Qt::IgnoreAction;
if (defaultAction == Qt::IgnoreAction) {
//This means that the drag was initiated by QDrag::start and we need to
//preserve the old behavior
#ifdef Q_WS_MAC
defaultAction = Qt::MoveAction;
#else
defaultAction = Qt::CopyAction;
#endif
}
#ifdef Q_WS_MAC
if (modifiers & Qt::ControlModifier && modifiers & Qt::AltModifier)
defaultAction = Qt::LinkAction;
else if (modifiers & Qt::AltModifier)
defaultAction = Qt::CopyAction;
else if (modifiers & Qt::ControlModifier)
defaultAction = Qt::MoveAction;
#else
if (modifiers & Qt::ControlModifier && modifiers & Qt::ShiftModifier)
defaultAction = Qt::LinkAction;
else if (modifiers & Qt::ControlModifier)
defaultAction = Qt::CopyAction;
else if (modifiers & Qt::ShiftModifier)
defaultAction = Qt::MoveAction;
else if (modifiers & Qt::AltModifier)
defaultAction = Qt::LinkAction;
#endif
// if the object is set take the list of possibles from it
if (object)
possibleActions = object->d_func()->possible_actions;
#ifdef QDND_DEBUG
qDebug("possible actions : %s", dragActionsToString(possibleActions).latin1());
#endif
// Check if the action determined is allowed
if (!(possibleActions & defaultAction)) {
if (possibleActions & Qt::CopyAction)
defaultAction = Qt::CopyAction;
else if (possibleActions & Qt::MoveAction)
defaultAction = Qt::MoveAction;
else if (possibleActions & Qt::LinkAction)
defaultAction = Qt::LinkAction;
else
defaultAction = Qt::IgnoreAction;
}
#ifdef QDND_DEBUG
qDebug("default action : %s", dragActionsToString(defaultAction).latin1());
#endif
return defaultAction;
}
