Book Image

Tkinter GUI Programming by Example

Book Image

Tkinter GUI Programming by Example

Overview of this book

Tkinter is a modular, cross-platform application development toolkit for Python. When developing GUI-rich applications, the most important choices are which programming language(s) and which GUI framework to use. Python and Tkinter prove to be a great combination. This book will get you familiar with Tkinter by having you create fun and interactive projects. These projects have varying degrees of complexity. We'll start with a simple project, where you'll learn the fundamentals of GUI programming and the basics of working with a Tkinter application. After getting the basics right, we'll move on to creating a project of slightly increased complexity, such as a highly customizable Python editor. In the next project, we'll crank up the complexity level to create an instant messaging app. Toward the end, we'll discuss various ways of packaging our applications so that they can be shared and installed on other machines without the user having to learn how to install and run Python programs.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Summary


In this chapter, we have learned all about Tkinter's indexing system. We know how to structure an index, combining the line number and character number with a full stop character to create an index such as 3.15.

We then covered how this system is applied to provide greater functionality, including tags and searches.

Tags are Tkinter's way of adjusting the styling options of a certain range of text, marked by beginning and end indexes. We have seen a lot of different styling options which we can change using tags, including the text color, which allows us to achieve syntax highlighting. We know how to configure and remove tags as we need them.

Searching a Text widget using a loop is well-practiced. We know how to use Tkinter's special strings to very quickly create the ending indexes from the established beginning and length of the match. We can use these to apply tags or replace text with something else.

Along our journey, we also picked up some knowledge of YAML files and their syntax...