20.06.2020, 22:12, "Allan Sandfeld Jensen" <k...@carewolf.com>: > On Samstag, 20. Juni 2020 21:00:27 CEST Alberto Mardegan wrote: >> On 20/06/20 21:42, Konstantin Tokarev wrote: >> > Comparing metaObject() with staticMetaObject() is wrong because it would >> > fail even for QProcess. >> >> I didn't try, but why would it fail? >> >> > OTOH, using qobject_cast would handle classes derived >> > from QProcess correctly, unlike code with typeid(). >> >> But how would you use qobject_cast in this case? We don't know what >> class to cast to; we only want to know if we are a subclass of QProcess. > > Can't you just check if a cast to QProcess succedes or fails then? >
Sorry, I haven't read the context carefully. In this particular case it's known that q is always instance of QProcess or derived class, and subject code distinguishes QProcess base class from derivatives. In this case, qobject_cast is not appropriate and it seems like comapring className() is a way to go. -- Regards, Konstantin _______________________________________________ Development mailing list Development@qt-project.org https://lists.qt-project.org/listinfo/development
