VP1TabBar Node1 VP1TabBar - m_d + VP1TabBar() + ~VP1TabBar() + setTabReorderingEnabled() + isTabReorderingEnabled() + setTabCloseActivatePrevious() + tabCloseActivatePrevious() + selectTab() # mouseDoubleClickEvent() # mousePressEvent() # mouseMoveEvent() # mouseReleaseEvent() # wheelEvent() # dragEnterEvent() # dragMoveEvent() # dropEvent() # tabLayoutChange() # activateDragSwitchTab() Node2 QTabBar Node2->Node1