Topic 14. Creating PySide6 GUI applications: widgets, layouts, signals, and slots

Goal: learn to create PySide6 forms, combine widgets with layouts, connect signals and slots, validate input, use timers, and work with forms created in Designer.

Lecture contents

1. The application and the event loop — From a console program to a GUI application · QApplication and the event loop
2. Widgets, layouts, and signals — Widgets and the ownership tree · Layouts instead of fixed coordinates · Signals and slots
3. Validation and linked fields — Validation and linked fields
4. The main window, actions, and timers — The main window, menus, and actions · Timers and UI responsiveness
5. Designer, styling, and testing — Qt Widgets Designer and .ui files · Styling, accessibility, and testing · Common mistakes

Practice and review

• Practice — 3 worked examples with complete code
• Tasks — 30 variants, each with tasks at three difficulty levels
• Summary — conclusions, self-check questions, and useful links