QtCreator integrates Designer with an IDE

QtCreator generates integration code and function bodies of slots.

You can create new .ui files, header files, and corresponding cpp files all at once, from QtCreator's File -> New -> Qt -> Designer Form Class.

Figure 9.19 shows you the three styles of code generation that it supports.

right-click on any signal-emitting component in the Widget editor

or any action in the Action Editor

Next, select a signal from the list that pops up (e.g., triggered()).

QtCreator generates a private slot for you – a prototype in the header file and a stub in the implementation file

The signal you select is automatically connected to that newly defined slot at runtime.

the connections are made by the QMetaObject::connectSlotsByName() function.