Book Image

Python GUI Programming with Tkinter.

By : Alan D. Moore
Book Image

Python GUI Programming with Tkinter.

By: Alan D. Moore

Overview of this book

Tkinter is a lightweight, portable, and easy-to-use graphical toolkit available in the Python Standard Library, widely used to build Python GUIs due to its simplicity and availability. This book teaches you to design and build graphical user interfaces that are functional, appealing, and user-friendly using the powerful combination of Python and Tkinter. After being introduced to Tkinter, you will be guided step-by-step through the application development process. Over the course of the book, your application will evolve from a simple data-entry form to a complex data management and visualization tool while maintaining a clean and robust design. In addition to building the GUI, you'll learn how to connect to external databases and network resources, test your code to avoid errors, and maximize performance using asynchronous programming. You'll make the most of Tkinter's cross-platform availability by learning how to maintain compatibility, mimic platform-native look and feel, and build executables for deployment across popular computing platforms. By the end of this book, you will have the skills and confidence to design and build powerful high-end GUI applications to solve real-world problems.
Table of Contents (23 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Implementing simple Tkinter dialogs


The status bar is fine for incidental information that shouldn't interrupt a user's workflow, but for errors that prevent work from continuing as expected, users should be alerted in a more assertive way. An error dialog that halts the program until it's acknowledged with a mouse click is fairly assertive and seems like a good way to address the issue of users not seeing errors. In order to implement these, you'll need to learn about Tkinter's messagebox library.

Tkinter messagebox

The best way to display simple dialog boxes in Tkinter is by using the tkinter.messagebox library, which contains several convenient functions that allow you to quickly create common dialog types. Each function displays a preset icon and a selection of buttons with a message and detail text that you specify, and returns a value depending on which button the user clicked.

The following table shows some of the messagebox functions with their icons and return values:

Function

Icon

Button...