Looking for a C++ widget toolkit for Linux

I am looking for a widget toolkit (a software bag of things that allow you to create GUI). I have two desideratas: I want to use C++ and I want to use it on GNU/Linux. I’ve found two big lists of widget toolkits: one on Wikipedia and one on atai.org. For the moment, I think of using gtkmm or wxWidgets but I need more information …

Now, some grumpy people will tell me they only use text-based applications đŸ˜‰