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Qt5 C++ GUI Programming Cookbook - Second Edition

By : Lee Zhi Eng

3 (4)

Qt5 C++ GUI Programming Cookbook

3 (4)

By: Lee Zhi Eng

Overview of this book

With the growing need to develop GUIs for multiple targets and multiple screens, improving the visual quality of your application becomes important so that it stands out from your competitors. With its cross-platform ability and the latest UI paradigms, Qt makes it possible to build intuitive, interactive, and user-friendly user interfaces for your applications. Qt5 C++ GUI Programming Cookbook, Second Edition teaches you how to develop functional and appealing user interfaces using the latest version of QT5 and C++. This book will help you learn a variety of topics such as GUI customization and animation, graphics rendering, implementing Google Maps, and more. You will also be taken through advanced concepts like asynchronous programming, event handling using signals and slots, network programming, various aspects of optimizing your application. By the end of the book, you will be confident to design and customize GUI applications that meet your clients' expectations and have an understanding of best practice solutions for common problems.

Preface

Preface

Who this book is for

What this book covers

To get the most out of this book

Sections

Get in touch

Free Chapter

Look-and-Feel Customization with Qt Designer

Look-and-Feel Customization with Qt Designer

Introduction

Technical requirements

Using style sheets with Qt Designer

Customizing basic style sheets

Creating a login screen using style sheets

Using resources in style sheets

Customizing properties and sub-controls

Styling in Qt Modeling Language (QML)

Exposing the QML object pointer to C++

Event Handling - Signals and Slots

Event Handling - Signals and Slots

Introduction

Technical requirements

New signals and slots syntax

UI events with signals and slots

Asynchronous programming made easier

Function callbacks

States and Animations with Qt and QML

States and Animations with Qt and QML

Introduction

Technical requirements

Property animation in Qt

Using easing curves to control property animation

Creating an animation group

Creating a nested animation group

State machines in Qt

States, transitions, and animations in QML

Animating widget properties using animators

Sprite animation

QPainter and 2D Graphics

QPainter and 2D Graphics

Introduction

Technical requirements

Drawing basic shapes onscreen

Exporting shapes to SVG files

Coordinate transformation

Displaying images onscreen

Applying image effects to graphics

Creating a basic paint program

Rendering a 2D canvas in QML

OpenGL Implementation

OpenGL Implementation

Introduction

Technical requirements

Setting up OpenGL in Qt

Hello World!

Rendering 2D shapes

Rendering 3D shapes

Texturing in OpenGL

Basic lighting in OpenGL

Moving an object using keyboard controls

3D canvas in QML

Using Network and Managing Large Documents

Using Network and Managing Large Documents

Introduction

Technical requirements

Creating a TCP server

Creating a TCP client

Uploading and downloading files using FTP

Threading Basics - Asynchronous Programming

Threading Basics - Asynchronous Programming

Introduction

Technical requirements

Using threads

QObject and QThread

Data protection and sharing data between threads

Working with QRunnable processes

Building a Touch Screen Application with Qt5

Building a Touch Screen Application with Qt5

Introduction

Technical requirements

Setting up Qt for mobile applications

Designing a basic user interface with QML

Touch events

Animation in QML

Displaying information using model/view

Integrating QML and C++

XML Parsing Made Easy

XML Parsing Made Easy

Technical requirements

Processing XML data using the stream reader

Writing XML data using the Stream Writer

Processing XML data using the QDomDocument class

Writing XML data using the QDomDocument class

Using Google's Geocoding API

Conversion Library

Conversion Library

Introduction

Technical requirements

Converting data

Converting images

Converting videos

Converting currency

Accessing Databases with SQL Driver and Qt

Accessing Databases with SQL Driver and Qt

Introduction

Technical requirements

Setting up a database

Connecting to a database

Writing basic SQL queries

Creating a login screen with Qt

Displaying information from a database on a model view

Advanced SQL queries

Develop Web Applications using Qt WebEngine

Develop Web Applications using Qt WebEngine

Introduction

Technical requirements

Introducing Qt WebEngine

Using WebView and web settings

Embedding Google Maps in your project

Calling C++ functions from JavaScript

Calling JavaScript functions from C++

Performance Optimization

Performance Optimization

Introduction

Technical requirements

Optimizing form and C++

Profiling and optimizing QML

Rendering and animation

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Creating a nested animation group

One good example of using a nested animation group is when you have several parallel animation groups and you want to play the groups in a sequential order.

How to do it...

Let's follow these steps to create a nested animation group to play different animation groups in a sequential order:

We will use the UI from the previous example and add a few more buttons to the main window, like so:

Create all of the animations for the buttons, and then create an easing curve and apply it to all of the animations:

QPropertyAnimation *animation1 = new QPropertyAnimation(ui->pushButton, "geometry");
animation1->setDuration(3000);
animation1->setStartValue(ui->pushButton-&gt...

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