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

Automating input

Preventing users from entering bad data is one way to improve the quality of their output; another approach is to automate the entry of data wherever the values are predictable. Using our understanding of how the forms are likely to be filled out, we can insert values that are very likely to be correct for certain fields.

Remember from Chapter 2, Designing GUI Applications, that the forms are nearly always recorded the same day that they're filled out, starting with Plot 1 and going to Plot 20 in order for each paper form.

Also remember that the Date, Time, Lab, and Technician values remain the same for each form that is filled in. That gives us the possibility of implementing some helpful automation, specifically:

  • The current date can automatically be inserted in the Date field
  • If the previous Plot was not the last plot in the lab, we can increment its value and leave the Time, Technician, and Lab values the same

Let's...