tabwidget how to set up your first tag can not drag ?

tabwidget how to set up the first label can not drag that only click , can not drag , turn off ?
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can not drag the first one, the other can drag each other ? Looks like it can only be a whole set
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Close button , then try the code below . .

QTabBar* pTabBar = m_pTabWidget->findChild<QTabBar*>(QLatin1String("qt_tabwidget_tabbar"));
  pTabBar->tabButton(0, QTabBar::RightSide)->hide();

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but the first one is to make not drag , the current practice is to put a button on the far left, simulated .
I do not know what can be directly set
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but the first one is to make not drag , the current practice is to put a button on the far left, simulated .   
I do not know what can be set directly  

I had to do all the time with the Tab key to simulate , so actually more flexible , very much agree with oh
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Thank you.
As you drag that problem , it will only reload mousepressevent and mousemoveevent then determine the coordinates processed .