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Python GUI Programming with Tkinter

You're reading from   Python GUI Programming with Tkinter Develop responsive and powerful GUI applications with Tkinter

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Product type Paperback
Published in May 2018
Publisher Packt
ISBN-13 9781788835886
Length 452 pages
Edition 1st Edition
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Author (1):
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Alan D. Moore Alan D. Moore
Author Profile Icon Alan D. Moore
Alan D. Moore
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Table of Contents (17) Chapters Close

Preface 1. Introduction to Tkinter 2. Designing GUI Applications with Tkinter FREE CHAPTER 3. Creating Basic Forms with Tkinter and ttk Widgets 4. Reducing User Error with Validation and Automation 5. Planning for the Expansion of Our Application 6. Creating Menus with Menu and Tkinter Dialogs 7. Navigating Records with Treeview 8. Improving the Look with Styles and Themes 9. Maintaining Cross-Platform Compatibility 10. Creating Automated Tests with unittest 11. Improving Data Storage with SQL 12. Connecting to the Cloud 13. Asynchronous Programming with Thread and Queue 14. Visualizing Data Using the Canvas Widget 15. Packaging with setuptools and cx_Freeze 16. Other Books You May Enjoy

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...

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