In this chapter, you learned about Qt's inter-object communication feature, signals and slots. You learned how to use them to automate form behavior, to connect functionality to user events, and to communicate between different windows in an application.
In the next chapter, we're going to learn about QMainWindow, a class that simplifies building common application components. You'll learn how to quickly create menus, toolbars, and dialog, as well as how to save settings.