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

Accessing sensors in Qt

Qt has had a robust porting layer for device sensors for several years, starting with the Qt Mobility libraries, which were meant to facilitate software development for cell phones. As Qt continued to evolve, support for sensors was added to Qt Quick and the list of supported sensors grew. Today, Qt supports the following sensors:

  • An accelerometer is supported through the Accelerometer type.
  • An altimeter is supported through the Altimeter type.
  • An ambient light sensor is supported through the AmbientLightSensor and LightSensor types.
  • An ambient temperature sensor is supported through the AmbientTemperatureSensor type.
  • A compass is supported through the Compass type.
  • A gyroscope is supported through the Gyroscope type.
  • Whether or not the device is in a holster is determined through the Holster type.
  • Proximity to the device's screen is determined through...