Hands-On Mobile and Embedded Development with Qt 5

图书信息

作者	Lorn Potter
出版社	Packt Publishing
ISBN	9781789618488
出版时间	2019-04-30
字数	32.2万
分类	进口书,外文原版书,电脑,网络

读书简介

Explore Qt framework and APIs for building cross-platform applications for mobile devices, embedded systems, and IoT Key Features * Build cross-platform applications and deploy them across mobile and connected devices * Design 2D and 3D UIs for embedded systems using Yocto and Qt Creator * Build machine to machine automation solution using QtSensors, QtMQTT, and QtWebSockets Book Description Qt is a world-class framework, helping you to develop rich graphical user interfaces (GUIs) and multi-platform applications that run on all major desktop platforms and most mobile or embedded platforms. The framework helps you connect the dots across platforms and between online and physical experience. This book will help you leverage the fully-featured Qt framework and its modular cross-platform library classes and intuitive APIs to develop applications for mobile, IoT, and industrial embedded systems. Considerations such as screen size, device orientation changes, and small memory will be discussed. We will focus on various core aspects of embedded and mobile systems, such as connectivity, networking, and sensors; there is no IoT without sensors. You will learn how to quickly design a flexible, fast, and responsive UI that looks great. Going further, you will implement different elements in a matter of minutes and synchronize the UI elements with the 3D assets with high precision. You will learn how to create high-performance embedded systems with 3D/2D user interfaces, and deploy and test on your target hardware. The book will explore several new features, including Qt for WebAssembly. At the end of this book, you will learn about creating a full software stack for embedded Linux systems using Yocto and Boot to Qt for Device Creation. What you will learn * Explore the latest features of Qt, such as preview for Qt for Python and Qt for WebAssembly * Create fluid UIs with a dynamic layout for different sized screens * Deploy embedded applications on Linux systems using Yocto * Design Qt APIs for building applications for embedded and mobile devices * Utilize connectivity for networked and machine automated applications * Discover effective techniques to apply graphical effects using Qt Quick apps Who this book is for The book is ideal for mobile developers, embedded systems engineers and enthusiasts who are interested in building cross-platform applications with Qt. Prior knowledge of C++ is required.

目录

Dedication

About Packt

Why subscribe?

Packt.com

Foreword

Contributors

About the author

About the reviewer

Packt is searching for authors like you

Preface

Who this book is for

What this book covers

To get the most out of this book

Download the example code files

Download the color images

Conventions used

Get in touch

Reviews

Section 1: Making Great UIs

Standard Qt Widgets

Hello mobile!

Qt Creator

Basic Qt Creator procedure

Qt Designer

Add a QMenu

Add QListView

Going smaller, handling screen sizes

Screen resolution

Memory and storage

Orientation

Gestures

Dynamic layouts

Graphics view

Summary

Fluid UI with Qt Quick

Qt Quick basics – anything goes

QML

Components

Dynamic binding

Signal connections

Model-view programming

GridView

ListView

PathView

TreeView

Gestures and touch

PinchArea

MultiPointTouchArea

Positioning

Layouts

Rigid layouts

Dynamic layout

Anchors

Qt Quick Controls 2 button, button, who's got the button?

Customizing

Show your data – Qt Data Visualization and Qt Charts

Qt Charts

Qt Data Visualization

Animate it!

Transitions

Animation

PropertyAnimation

NumberAnimation

SequentialAnimation

ParallelAnimation

SpringAnimation

Easing

SceneGraph

Summary

Graphical and Special Effects

The universe of particles

ParticleSystem

Particle painters, emitters, and affectors

Affectors

Shapes and directions

Graphical effects for Qt Quick

DropShadow

Glow

Gradient

Blur

Summary

Input and Touch

What to do when there's no keyboard

Using touch input

QEvent

Event filter

Event loop

Touchscreen support

Windows, iOS and Android

Linux

evdev

libevdev

libinput

Tslib

Using the touchscreen

MultiPointTouchArea

Qt Gestures

Voice as input

QtAlexaAuto

Summary

Section 2: Networking, Connectivity, Sensors, and Automation

Qt Network for Communication

High level – request, reply, and access

QNetworkRequest

QNetworkAccessManager

QNetworkReply

QFtp

Bearer Management of good news

QNetworkConfiguration

QNetworkConfiguration::BearerType

QNetworkConfiguration::StateFlags

QNetworkConfigurationManager

QNetworkSession

Roaming

QBearerEngine

Low level – of sockets and servers

QLocalServer

QLocalSocket

QTcpServer

QTcpSocket

QSctpServer

QSctpSocket

QUdpSocket

QSslSocket

QSslServer

Lookups – look me up

QHostInfo

QDnsLookup

Summary

Connectivity with Qt Bluetooth LE

What is Bluetooth Low Energy?

Implementing a BLE GATT server

QLowEnergyAdvertisingData

QLowEnergyCharacteristicData

QLowEnergyServiceData

Discovery and Pair-ity – search and connect for BLE devices

QBluetoothDeviceDiscoveryAgent

QBluetoothLocalDevice

Specifying and getting client data

QLowEnergyController

QLowEnergyService

QLowEnergyCharacteristic

QLowEnergyDescriptor

Bluetooth QML

BluetoothDiscoveryModel

BluetoothService

BluetoothSocket

Summary

Machines Talking

Sensory control – QtSensor data

QSensor

The QSensor subclass

QSensorFilter

QSensor data

QSensorReading

QML sensors

Custom QSensor and the backend engine

Custom QSensor

Custom QSensorBackend

Sensors.conf

QSensorGesture

QSensorGestureManager

SensorGesture

WebSockets – Bi-directional web communication

QWebSocketServer

QWebSocket

Client

QtQuick

WebSocketServer

WebSocket

QMqtt – Brokers of machine talk

QMqttClient

Putting it all together

Summary

Where Am I? Location and Positioning

Positioning with satellites

QGeoSatelliteInfoSource

QGeoSatelliteInfo

QGeoPositionInfoSource

QGeoPositionInfo

QGeoCoordinate

Qt Quick

Mapping the positions

Map

MapCircle

PluginParameter

RouteModel

Places of interest

Summary

Section 3: Other APIs Qt SQL, Qt Multimedia, and Qt Purchasing

Sounds and Visions - Qt Multimedia

Sonic vibrations – audio

Qt.vector3d

AudioEngine

AudioSample

Sound

AudioListener

SoundInstance

Audio

QAudioRecorder

QMediaPlayer

QAudioOutput

Image sensors – camera

QCameraInfo

Camera

VideoOutput

Visual media – playing video

Tuning it in – FM radio tuner

Summary

Remote Databases with Qt SQL

Technical requirements

Drivers are database backends

Setup

The MySQL server

SQLite

Connecting to a local or remote database

QSqlDatabase

Creating and opening a database

Adding data to the database

Executing queries

QSqlQuery

QSqlQueryModel

Summary

Enabling In-App Purchases with Qt Purchasing

Registering on Android Google Play

Registering on iOS App Store

Creating an in-app product

Store

Product

Transaction

Restoring purchases

Summary

Section 4: Mobile Deployment and Device Creation

Cross Compiling and Remote Debugging

Cross compiling

Traditional cross tools

DIY toolchain

Buildroot

Crosstool-NG

Prebuilt tools

Boot to Qt

Cross toolchains on Windows

Sysprogs

Windows Subsystem for Linux

Mobile platform-specific tools

iOS

Android

QNX

Connecting to a remote device

Qt Creator

Generic Linux

Android

iOS

Bare metal

Debugging remotely

gdbserver

Qt Creator

Summary

Deploying to Mobile and Embedded

Deployment for Android

The package

androiddeployqt

Qt Creator

Test track

Internal tests

Deployment for iOS

The package

Qt Creator

Xcode

Alternative OSes

Sailfish OS

UBports

Clickable

Embedded Linux

OS deployment

App deployment

Summary

Universal Platform for Mobiles and Embedded Devices

What is this WebAssembly thing?

Technical requirements

Getting started

Download Emscripten

Building an Emscripten SDK manually

Technical requirements

Configuring and compiling Qt

Building with the command line

Building with Qt Creator

The Build environment

The Run environment

Deploying for mobile and embedded devices

Tips, tricks, and suggestions

Browsers

Debugging

Networking

Fonts and filesystem access

OpenGL

Supported Qt modules

Other caveats

Summary

Building a Linux System

Bootcamp – Boot to Qt

Rolling your own – custom embedded Linux

System customization

local.conf file

meta- directories

.bb files

devtool command

recipetool command

bitbake-layers

yocto-layer

bbappend files

Deploying to an embedded system

OpenEmbedded

Raspberry Pi

Summary

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