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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

Playing the drum machine

Now that we have a mechanism to load drum samples and a mechanism to define beat patterns in place, let's add the ability to play these beat patterns. In many ways, this is the core of our program.

Let's first understand the functionality that we want to achieve here.

Once the user has loaded one or more drum samples and has defined a beat pattern using the toggle buttons, we need to scan each column of the pattern to see if it finds a green button (a True value in our data structure).

If the value is True for a given location in the matrix, our code should play the corresponding drum sample before moving ahead. If two or more drum samples are selected in the same column, all the samples should play almost simultaneously.

Moreover, there should be a fixed time gap between the playing of each successive column, which will define the tempo of the...

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