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

Changing the editor's color scheme


Begin with a new file named colorchooser.py in the same directory as the rest of your Python files. In this file, we will be creating another Toplevel window, which gives the user the ability to set some color variables.

Once again, we have the problem of needing to get some information from a user in a specified format. Luckily, Tkinter is on our side once again, and has provided a colorchooser module that allows us to collect color choices from the user. We again need only one function from this module, called askcolor:

import tkinter as tk
import tkinter.ttk as ttk
from tkinter.colorchooser import askcolor

We begin this file by importing this function from the colorchooser module found within Tkinter. We can now begin creating our class:

class colorChooser(tk.Toplevel):
    def __init__(self, master, **kwargs):
        super().__init__(**kwargs)
        self.master = master

        self.transient(self.master)
        self.geometry('400x300')
        self...