Book Image

Python GUI Programming Cookbook, Second Edition - Second Edition

By : Burkhard Meier
Book Image

Python GUI Programming Cookbook, Second Edition - Second Edition

By: Burkhard Meier

Overview of this book

Python is a multi-domain, interpreted programming language. It is a widely used general-purpose, high-level programming language. It is often used as a scripting language because of its forgiving syntax and compatibility with a wide variety of different eco-systems. Python GUI Programming Cookbook follows a task-based approach to help you create beautiful and very effective GUIs with the least amount of code necessary. This book will guide you through the very basics of creating a fully functional GUI in Python with only a few lines of code. Each and every recipe adds more widgets to the GUIs we are creating. While the cookbook recipes all stand on their own, there is a common theme running through all of them. As our GUIs keep expanding, using more and more widgets, we start to talk to networks, databases, and graphical libraries that greatly enhance our GUI’s functionality. This book is what you need to expand your knowledge on the subject of GUIs, and make sure you’re not missing out in the long run.
Table of Contents (18 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

How to create multiple threads


We will create multiple threads using Python. This is necessary in order to keep our GUI responsive.

Note

A thread is like weaving a fabric made out of yarn and is nothing to be afraid of.

Getting ready

Multiple threads run within the same computer process memory space. There is no need for IPC, which would complicate our code. In this recipe, we will avoid IPC by using threads.

How to do it…

First we will increase the size of our ScrolledText widget, making it larger. Let's increase scrol_w to 40 and scrol_h to 10:

    # Using a scrolled Text control 
    scrol_w = 40; scrol_h = 10                           # increase sizes
    self.scrol = scrolledtext.ScrolledText(mighty, width=scrol_w, 
                                           height=scrol_h, 
                                           wrap=tk.WORD)
    self.scrol.grid(column=0, row=3, sticky='WE', columnspan=3)

When we now run the resulting GUI, the Spinbox widget is center-aligned in relation to the Entry widget...