QT code generator

cppcon2015 Qt: modern user interfaces for C++

QT CODE GENERATORS

• moc
• uic

• rcc

• improve productivity

• simplify code maintenance
• overcome C++ limitations

doc.qt The Meta-Object System

Qt's meta-object system provides the signals and slots mechanism for inter-object communication, run-time type information, and the dynamic property system.

NOTE:

"run-time type information"即"RTTI"

The meta-object system is based on three things:

1、The QObject class provides a base class for objects that can take advantage of the meta-object system.

2、The Q_OBJECT macro inside the private section of the class declaration is used to enable meta-object features, such as dynamic properties, signals, and slots.

3、The Meta-Object Compiler (moc) supplies each QObject subclass with the necessary code to implement meta-object features.

The moc tool reads a C++ source file. If it finds one or more class declarations that contain the Q_OBJECT macro, it produces another C++ source file which contains the meta-object code for each of those classes. This generated source file is either #include'd into the class's source file or, more usually, compiled and linked with the class's implementation.

NOTE:

"tag-auxiliary compiler source transformer code generator-QT-C++with macro annotation注解"