Book Image

Qt5 Python GUI Programming Cookbook

By : B. M. Harwani
Book Image

Qt5 Python GUI Programming Cookbook

By: B. M. Harwani

Overview of this book

PyQt is one of the best cross-platform interface toolkits currently available; it's stable, mature, and completely native. If you want control over all aspects of UI elements, PyQt is what you need. This book will guide you through every concept necessary to create fully functional GUI applications using PyQt, with only a few lines of code. As you expand your GUI using more widgets, you will cover networks, databases, and graphical libraries that greatly enhance its functionality. Next, the book guides you in using Qt Designer to design user interfaces and implementing and testing dialogs, events, the clipboard, and drag and drop functionality to customize your GUI. You will learn a variety of topics, such as look and feel customization, GUI animation, graphics rendering, implementing Google Maps, and more. Lastly, the book takes you through how Qt5 can help you to create cross-platform apps that are compatible with Android and iOS. You will be able to develop functional and appealing software using PyQt through interesting and fun recipes that will expand your knowledge of GUIs
Table of Contents (20 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Creating a signin form – applying an authentication procedure


In this recipe, we will be learning how rows can be accessed from a specific table and compared with the information supplied.

We assume that a database called ECommerce already exists and a table called Users also exists in the ECommerce database. The Users table consists of two columns, EmailAddress and Password. Also, we assume that the Users table contains a few rows in it. The user will be prompted to enter their email address and password in the signin form. The Users table is searched for the specified email address. If the email address is found in the Users table, then the password in that row is compared with the password entered. If the two passwords match, a welcome message is displayed; otherwise, an error message indicating that the email address or password don't match is displayed.

How to do it…

Here are the steps to understand how data in a database table can be compared with data entered by the user and authenticate...