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Application Development with Qt Creator

By : Eng

2.3 (4)

Application Development with Qt Creator

2.3 (4)

By: Eng

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.

Preface

Preface

Who this book is for

What this book covers

To get the most out of this book

Get in touch

Section 1: The Basics

Section 1: The Basics

Free Chapter

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

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

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

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

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

Section 2: Advanced Features

Section 2: Advanced Features

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

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

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

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

Section 3: Practical Matters

Section 3: Practical Matters

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

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

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

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

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

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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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