[AshamedCaptain]

You certainly can, but the problem is that there is no agreed standard from the toolkits to do it. E.g. Qt has its own way.

[hulitu]

Why does QT needs to be smarter ? Just asking.

[jcelerier]

Qt runs on platforms where there is literally only a kernel + the Qt app running, through for instance EGL for rendering. So it has to have its own way.