Here is a video of QxEntityEditor application to show how to import an existing database structure (MySQL Workbench project) :

Video step by step :
1- MySQL Workbench project - Sakila sample database (10s) ;
2- Create a DSN to connect to MySQL by ODBC (46s) ;
3- Import database structure in a QxEntityEditor project (1m 15s) ;
4- Export QxEntityEditor project to a C++ Qt project (3m 10s) ;
5- Build the generated C++ Qt project (4m 22s).