Events, Signals and Slots

Introduction

Events, signals, and slots are crucial notions for PyQt GUI application development. GUIs are event driven, which means they react to user-created events, such as those made by the keyboard or mouse, and system generated events, such as those brought on by timers or Bluetooth connections. The application must pay attention to these events, also known as event handling, regardless of how they are produced. For instance, the program starts to listen to events when exec() is called and continues to do so until it is closed. Signals and slots are used in PyQt to handle events.

Events, signals, and slots in action

Events also referred to as signals, occur when a widget's state changes, such as whenever a button is ...