Book Image

Tkinter GUI Application Development Blueprints

By : Chaudhary
Book Image

Tkinter GUI Application Development Blueprints

By: 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, media player, drawing application, chat application, screen saver, port scanner, and many 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 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 (10 chapters)
9
Index

Creating a seek bar


Now, let's add a seek bar to the audio player. Tkinter offers the Scale widget that we used for the volume scale. The Scale widget could have functioned as a seek bar. But we want something more fancy.

Moreover, the Scale widget would look different on different platforms. Instead, we want the seek bar to look uniform on all platforms. This is where we can create our own widget to meet the custom needs for the audio player.

Let's create our own Seekbar widget, as shown in the following image:

The simplest way to create our own widget is to inherit from an existing widget or the Widget class.

When you look at the source code of Tkinter, you will find that all the widgets inherit from a class named Widget. The Widget class in turn inherits from another class called BaseWidget. The BaseWidget class contains the code that is used to handle the widget's destroy() method, but it is not aware of a geometry manager.

Therefore, if we want our custom widget to be aware of and use geometry...