Hi Thomas,
We do not currently have any official support for using the EyeX SDK with Qt. We only support using the EyeX SDK for C/C++ with Microsoft Visual Studio and have a tutorial how to setup using EyeX with Visual Studio. I do not myself use Qt, and can only give some hints, like above, based on general C++ knowledge on how to go about using EyeX with Qt.
We know Qt and Qt Creator are used by many C++ developers, and we will hopefully provide an EyeX integration for Qt in the future.