Book Image

Python GUI Programming - A Complete Reference Guide

By : Alan D. Moore, B. M. Harwani
Book Image

Python GUI Programming - A Complete Reference Guide

By: Alan D. Moore, B. M. Harwani

Overview of this book

A responsive graphical user interface (GUI) helps you interact with your application, improves user experience, and enhances the efficiency of your applications. With Python, you’ll have access to elaborate GUI frameworks that you can use to build interactive GUIs that stand apart from the rest. This Learning Path begins by introducing you to Tkinter and PyQt, before guiding you through the application development process. As you expand your GUI by adding more widgets, you'll work with networks, databases, and graphical libraries that enhance its functionality. You'll also learn how to connect to external databases and network resources, test your code, and maximize performance using asynchronous programming. In later chapters, you'll understand how to use the cross-platform features of Tkinter and Qt5 to maintain compatibility across platforms. You’ll be able to mimic the platform-native look and feel, and build executables for deployment across popular computing platforms. By the end of this Learning Path, you'll have the skills and confidence to design and build high-end GUI applications that can solve real-world problems. This Learning Path includes content from the following Packt products: Python GUI Programming with Tkinter by Alan D. Moore Qt5 Python GUI Programming Cookbook by B. M. Harwani
Table of Contents (28 chapters)
Title Page

Drawing a circle of a desired size

In this recipe, we will be learning to draw a circle. The user will click and drag the mouse to define the diameter of the circle, and the circle will be drawn at the diameter specified by the user.

How to do it...

A circle is nothing but an arc that is drawn from 0 to 360 degrees. The length of the arc, or you can say the diameter of the circle, is determined by the distance of mouse press event and mouse release events. A rectangle is defined internally from mouse press event until mouse release event, and the circle is drawn within that rectangle. Here are the complete steps to create this application:

  1. Let's create an application based on the Dialog without Buttons template.
  2. Add a QLabel...