Hide close button of a tab in QTabWidget

[Mr Gisa]

I'm trying to hide/remove the close button of a tab in QTabWidget. There's a tab I call Welcome or Getting started. I don't want it to be closable.

This is the code that I came up with:

auto tabBar = mCentralTabWidget->tabBar();
tabBar->tabButton(0, QTabBar::RightSide)->hide();

Get the QTabBar instance of the QTabWidget, call the tabButton method in other to return the close button widget and then call hide. It works, but the problem is that now it has a weird spacing after the tab title:

I was wondering, how to get rid of that spacing?

[Paul Colby]

Instead of hiding the widget, remove it! :)

tabBar->tabButton(0, QTabBar::RightSide)->deleteLater();
tabBar->setTabButton(0, QTabBar::RightSide, 0);

(tested; works nicely on Linux)

This is essentially what QTabBar is doing on each tab any time you set QTabBar::tabsClosable to false. Ie have a look at https://github.com/qt/qtbase/blob/a37dd93defd91b79fb6730d0ff0515a66a0d3972/src/widgets/widgets/qtabbar.cpp#L2337

Note, you should also look at how the code evaluates which side to close too sometime.

Cheers.

[Mr Gisa]

@Paul-Colby said in Hide close button of a tab in QTabWidget:

tabBar->tabButton(0, QTabBar::RightSide)->deleteLater();
tabBar->setTabButton(0, QTabBar::RightSide, 0);

That is amazing, thank you very much.