Book Image

Tkinter GUI Application Development Blueprints - Second Edition

By : Bhaskar Chaudhary
Book Image

Tkinter GUI Application Development Blueprints - Second Edition

By: Bhaskar Chaudhary

Overview of this book

Tkinter is the built-in GUI package that comes with standard Python distributions. It is a cross-platform package, which means you build once and deploy everywhere. It is simple to use and intuitive in nature, making it suitable for programmers and non-programmers alike. This book will help you master the art of GUI programming. It delivers the bigger picture of GUI programming by building real-world, productive, and fun applications such as a text editor, drum machine, game of chess, audio player, drawing application, piano tutor, chat application, screen saver, port scanner, and much more. In every project, you will build on the skills acquired in the previous project and gain more expertise. You will learn to write multithreaded programs, network programs, database-driven programs, asyncio based programming and more. You will also get to know the modern best practices involved in writing GUI apps. With its rich source of sample code, you can build upon the knowledge gained with this book and use it in your own projects in the discipline of your choice.
Table of Contents (12 chapters)

The number of units and beats per unit features

We earlier coded the matrix called create_right_button_matrix, which creates a two-dimensional matrix with the number of rows equal to MAX_NUMBER_OF_DRUM_SAMPLES. The number of columns would be decided by multiplying the number of units by the beats per unit values selected by the end user. Its formula can be given as follows:

Number of columns of buttons = Number of units x BPU

This means that every time the user changes the number of units or the beats per unit, the button matrix should be redrawn to change the number of columns. This change should also be reflected in our underlying data structure. Let's add this feature to our drum machine.

We had earlier defined two dummy methods—on_number_of_units_changed() and on_bpu_changed(). We modify them now as follows (see code 3.04.py):

def on_number_of_units_changed(self...