Signals and Slots. In Qt, we have an alternative to the callback technique: We use signals and slots. A signal is emitted when a particular event occurs. Qt's widgets have many predefined signals, but we can always subclass widgets to add our own sign

Introduction to Qt - Qt Creator IDE Overview and Examples {tutorial} An overview tutorial on Qt Creator IDE giving you basic knowledge on navigation, where to find examples, use documentation and tutorials inside the environment itself.

Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt. In GUI programming, when we change one widget, we often want another widget to be notified.