Comment by foresto

Qt is an interesting case, because it doesn't use the native platform's widget code*, but does a good job of looking and behaving as though it does. That's usually close enough for me.

Various other toolkits have tried this approach, but unfortunately, I'm not aware of any others that succeed. Common deficiencies include keyboard navigation and text rendering.

*(Except on Qt-based desktops like KDE Plasma, of course.)