Book Image

Hands-On GUI Programming with C++ and Qt5

By : Lee Zhi Eng
Book Image

Hands-On GUI Programming with C++ and Qt5

By: Lee Zhi Eng

Overview of this book

Qt 5, the latest version of Qt, enables you to develop applications with complex user interfaces for multiple targets. It provides you with faster and smarter ways to create modern UIs and applications for multiple platforms. This book will teach you to design and build graphical user interfaces that are functional, appealing, and user-friendly. In the initial part of the book, you will learn what Qt 5 is and what you can do with it. You will explore the Qt Designer, discover the different types of widgets generally used in Qt 5, and then connect your application to the database to perform dynamic operations. Next, you will be introduced to Qt 5 chart which allows you to easily render different types of graphs and charts and incorporate List View Widgets in your application. You will also work with various Qt modules, like QtLocation, QtWebEngine, and the networking module through the course of the book. Finally, we will focus on cross-platform development with QT 5 that enables you to code once and run it everywhere, including mobile platforms. By the end of this book, you will have successfully learned about high-end GUI applications and will be capable of building many more powerful, cross-platform applications.
Table of Contents (18 chapters)

Sessions, cookies, and cache

Just like any other web browser, the WebEngine module also supports mechanisms used to store temporary data and persistent data for session and cache. Sessions and cache are very important as they allow websites to remember your last visit and associate you with data, such as a shopping cart. The definitions of a session, a cookie, and a cache are shown as follows:

  • Session: Normally, sessions are server-side files that contain user information with a unique identifier, which gets sent from the client side to map them to a specific user. In Qt, however, a session simply means a cookie that doesn't have any expiration date, and hence it will be gone when the program is closed.
  • Cookie: Cookies are client-side files that contain user information or any other information that you want to save. Unlike sessions, cookies have an expiration date which...