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.

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Table of Contents (19 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
1
Section 1: The Basics
Section 1: The Basics
Free Chapter
2
Getting Started with Qt Creator
Getting Started with Qt Creator
Technical requirements
Downloading Qt and Qt Creator
New features in Qt
Finding your way around Qt Creator
Your first application – Hello World
Hello World using the Qt Widgets library
Hello World using Qt Quick
Summary
3
Building Applications with Qt Creator
Building Applications with Qt Creator
Technical requirements
Getting started – our sample library
Learning the landscape – the Build menu and the .pro file
Linking against our sample library
Getting lost and found again – debugging
The Projects pane and building your project
A review – running and debugging your application
Summary
4
Designing Your Application with Qt Designer
Designing Your Application with Qt Designer
Technical requirements
Introducing signals and slots
Creating user interfaces with Qt Designer
Instantiating forms, message boxes, and dialogs in your application
Wiring the Qt Widgets application logic
Introducing Qt Quick's support for declarative user interface development
Understanding the building of a Qt application
Creating the Qt application
Summary
5
Qt Foundations
Qt Foundations
Technical requirements
Representing data using Qt's core classes
Multithreading in Qt
Accessing files using Qt
Accessing HTTP resources using Qt
Parsing XML using Qt
Parsing JSON using Qt
Summary
6
Developing Applications with Qt Widgets
Developing Applications with Qt Widgets
Technical requirements
Your main application and its menus
Creating simple Qt Widgets
Managing the widget layout with layouts
Model-View-Controller programming with Qt
Rendering web content with QWebEngineView
Using the model editor
Enabling LSP on your Qt Creator
Summary
7
Section 2: Advanced Features
Section 2: Advanced Features
8
Drawing with Qt
Drawing with Qt
Technical requirements
Starting to draw in Qt
Drawing with QPainter on QPaintDevice instances
Drawing off screen
Creating custom widgets
Introducing the Graphics View framework
Summary
9
Doing More with Qt Quick
Doing More with Qt Quick
Technical requirements
Understanding the fundamental concepts of Qt Quick
Using states and transitions in Qt Quick
Integrating Qt Quick and C++
Putting it all together – an image gallery application
Introducing the new Qt Quick Controls 2
Understanding the new graphical editor for SCXML
Summary
10
Implementing Multimedia with Qt Quick
Implementing Multimedia with Qt Quick
Technical requirements
Implementing multimedia in Qt
Playing audio clips and sound effects
Playing video clips
Accessing the camera
Summary
11
Sensors and Qt Quick
Sensors and Qt Quick
Technical requirements
Accessing sensors in Qt
Determining device location
Obtaining a device's position
Placing a position marker on a Map View
Accessing sensors with C++
Summary
12
Section 3: Practical Matters
Section 3: Practical Matters
13
Localizing Your Application with Qt Linguist
Localizing Your Application with Qt Linguist
Technical requirements
Understanding the task of localization
Marking strings for localization
Localizing your application with QLinguist
Localizing special parameters – currencies and dates with QLocale
Summary
14
Optimizing Performance with Qt Creator
Optimizing Performance with Qt Creator
Technical requirements
Introducing QML performance analysis
Introducing QML Profiler
Doing more with QML Profiler
Implementing test integration
Adding better support for test integration
Summary
15
Developing Mobile Applications with Qt Creator
Developing Mobile Applications with Qt Creator
Technical requirements
Understanding mobile software development
Setting up Qt Creator for Android
Deploying applications to Android devices
Setting up Qt Creator for iOS
Improving support for iOS and Android applications
Summary
16
Embedded and IoT Development with Qt Creator
Embedded and IoT Development with Qt Creator
Technical requirements
Setting up an embedded Linux image
Building a cross-compiled Qt application
Configuring Qt for an embedded project
Writing your first embedded program
Deploying a Qt application to an embedded system
Summary
17
Qt Tips and Tricks
Qt Tips and Tricks
Technical requirements
Writing console applications with Qt Creator
Integrating Qt Creator with version control systems
Configuring the coding style and coding format options
Applying new themes to Qt Creator
Setting the Qt Quick window display options
Building projects from CMake and the command line
Running multiple debuggers simultaneously
Learning more about Qt
Summary
18
Other Books You May Enjoy
Other Books You May Enjoy
Leave a review - let other readers know what you think

Technical requirements

The technical requirements for this chapter include Qt (commercial license) 5.13.1 Boot2Qt Emulator, Qt Creator 4.10.1, Windows 10, a GNU Toolchain, Python 2.8, WinFLASHTool, Debian for BeagleBone (or another system), and an SSH server. You also need a physical embedded device, such as the Intel NUC or Raspberry Pi, for deployment.

You can apply for a 30-day trial in order to try out the various features. You will learn how to apply for the trial license in the following section of this chapter. Note that you can still develop your Qt application for embedded devices without using the commercial license, but that will require a ton of manual work and professional know-how. Other than that, you will also need a lot of patience in order to deploy your program to the embedded system without using the automated method provided by the Qt commercial license.

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