ScrollArea in a tabWidget

[Yaoming]

Hello there
Here's my problem: I've got this application: aze.jpg
My left widget is a TabWidget in which I can add some textEdits. Those textEdit adapt their size to the content they have (they grow bigger each time you write something in them). My problem is the tab widget I got is far too small and I would like to be able to scroll it when my textEdit becomes to big to be fully displayed in it.

I've tried to create a QScrollArea but the scrollbars are not showing up:

//here's the constructor
        scrollArea = new QScrollArea(this);  //i've created a QScrollArea* in my .h
	scrollArea->setWidgetResizable(true);  
	ui.Onglets->insertTab(0, scrollArea, "Kayaaa");//i try to add my scrollArea to my tabWidget but it creates a new tab and I would like the scrollArea to be in my existing tabs

//here's the constructor
        scrollArea = new QScrollArea(this);  //i've created a QScrollArea* in my .h
	scrollArea->setWidgetResizable(true);  
	ui.Onglets->insertTab(0, scrollArea, "Kayaaa");//i try to add my scrollArea to my tabWidget but it creates a new tab and I would like the scrollArea to be in my existing tabs

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