Book Image

Application Development with Qt Creator - Third Edition

By : Lee Zhi Eng, Ray Rischpater
Book Image

Application Development with Qt Creator - Third Edition

By: Lee Zhi Eng, Ray Rischpater

Overview of this book

Qt is a powerful development framework that serves as a complete toolset for building cross-platform applications, helping you reduce development time and improve productivity. Completely revised and updated to cover C++17 and the latest developments in Qt 5.12, this comprehensive guide is the third edition of Application Development with Qt Creator. You'll start by designing a user interface using Qt Designer and learn how to instantiate custom messages, forms, and dialogues. You'll then understand Qt's support for multithreading, a key tool for making applications responsive, and the use of Qt's Model-View-Controller (MVC) to display data and content. As you advance, you'll learn to draw images on screen using Graphics View Framework and create custom widgets that interoperate with Qt Widgets. This Qt programming book takes you through Qt Creator's latest features, such as Qt Quick Controls 2, enhanced CMake support, a new graphical editor for SCXML, and a model editor. You'll even work with multimedia and sensors using Qt Quick, and finally develop applications for mobile, IoT, and embedded devices using Qt Creator. By the end of this Qt book, you'll be able to create your own cross-platform applications from scratch using Qt Creator and the C++ programming language.
Table of Contents (19 chapters)
1
Section 1: The Basics
7
Section 2: Advanced Features
12
Section 3: Practical Matters

Introducing QML performance analysis

Qt Quick applications are supposed to be fast, with smooth and fluid user interfaces. In many cases, this is easy to accomplish with QML; the contributors to QML and the Qt Quick runtime have put a great deal of effort into creating an environment that performs well in a wide variety of circumstances. Sometimes, however, try as you might, you will find that you just can't squeeze the performance out of your application that you'd like. Some mistakes are obvious, such as the following:

  • Doing a lot of compute-intensive tasks between state changes or actions that trigger drawing operations
  • Excessively complex view hierarchies with thousands of elements on display at once
  • Running on very limited hardware (often in combination with the first two problems)

Knuth famously said, "Premature optimization is the root of all evil,&quot...