定位到是这段代码
QT_BEGIN_NAMESPACE
class QAction;
class QMenu;
class QMdiArea;
class QMdiSubWindow;
class QSignalMapper;
class QCompleter;
class QAbstractItemModel;
class QListWidget;
class QLabel;
class QScrollArea;
class prjTreeWid;
class QProcess;
class outputDock;
QT_END_NAMESPACE
