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Tkinter GUI Application Development Blueprints, Second Edition

You're reading from   Tkinter GUI Application Development Blueprints, Second Edition Build nine projects by working with widgets, geometry management, event handling, and more

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Product type Paperback
Published in Mar 2018
Publisher Packt
ISBN-13 9781788837460
Length 422 pages
Edition 2nd Edition
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Author (1):
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Bhaskar Chaudhary Bhaskar Chaudhary
Author Profile Icon Bhaskar Chaudhary
Bhaskar Chaudhary
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Table of Contents (12) Chapters Close

Preface 1. Meet Tkinter FREE CHAPTER 2. Making a Text Editor 3. Programmable Drum Machine 4. Game of Chess 5. Building an Audio Player 6. Paint Application 7. Piano Tutor 8. Fun with Canvas 9. Multiple Fun Projects 10. Miscellaneous Tips 11. Other Books You May Enjoy

Event unbinding and virtual events

In addition to the bind method that you previously saw, you might find the following two event-related options useful in certain cases:

  • Unbind: Tkinter provides the unbind option to undo the effect of an earlier binding. The syntax is as follows:
widget.unbind(event)

The following are some examples of its usage:

entry.unbind('<Alt-Shift-5>')
root.unbind_all('<F1>')
root.unbind_class('Entry', '<KeyPress-Del>')
  • Virtual events: Tkinter also lets you create your own events. You can give these virtual events any name that you want. For example, let's suppose that you want to create a new event called <<commit>>, which is triggered by the F9 key. To create this virtual event on a given widget, use the following syntax:
widget.event_add('<<commit>>', '<KeyRelease-F9>')

You can then bind <<commit>> to a callback by using a normal bind() method, as follows:

widget.bind('<<commit>>', callback)

Other event-related methods can be accessed by typing the following line in the Python Terminal:

>>> import tkinter
>>> help(tkinter.Event)

Now that you are ready to delve into real application development with Tkinter, let's spend some time exploring a few custom styling options that Tkinter offers. We will also have a look at some configuration options that are commonly used with the root window.

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Tkinter GUI Application Development Blueprints, Second Edition - Second Edition
Published in: Mar 2018
Publisher: Packt
ISBN-13: 9781788837460
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