Book Image

Python GUI Programming with Tkinter, 2nd edition - Second Edition

By : Alan D. Moore
4.5 (2)
Book Image

Python GUI Programming with Tkinter, 2nd edition - Second Edition

4.5 (2)
By: Alan D. Moore

Overview of this book

Tkinter is widely used to build GUIs in Python due to its simplicity. In this book, you’ll discover Tkinter’s strengths and overcome its challenges as you learn to develop fully featured GUI applications. Python GUI Programming with Tkinter, Second Edition, will not only provide you with a working knowledge of the Tkinter GUI library, but also a valuable set of skills that will enable you to plan, implement, and maintain larger applications. You’ll build a full-blown data entry application from scratch, learning how to grow and improve your code in response to continually changing user and business needs. You’ll develop a practical understanding of tools and techniques used to manage this evolving codebase and go beyond the default Tkinter widget capabilities. You’ll implement version control and unit testing, separation of concerns through the MVC design pattern, and object-oriented programming to organize your code more cleanly. You’ll also gain experience with technologies often used in workplace applications, such as SQL databases, network services, and data visualization libraries. Finally, you’ll package your application for wider distribution and tackle the challenge of maintaining cross-platform compatibility.
Table of Contents (22 chapters)
19
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20
Index
Appendices

Reducing User Error with Validation and Automation

Things are going well for our project: the data entry form works well, the code is better organized, and the users are excited at the prospect of using the application. We're not ready for production yet, though! Our form doesn't yet perform the promised task of preventing or discouraging user errors: number boxes still allow letters, combo boxes aren't limited to the choices given, and dates are just text fields that have to be filled in by hand. In this chapter, we're going to set things right as we work through the following topics:

  • In Validating user input, we'll talk about some strategies for enforcing correct values in our widgets and how to implement them in Tkinter.
  • In Creating validated widget classes, we'll super-charge Tkinter's widget classes with some custom validation logic.
  • In Implementing validated widgets in our GUI, we'll use our new widgets to improve...