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Qt5 C++ GUI Programming Cookbook

Qt5 C++ GUI Programming Cookbook

By : Eng
3 (4)
Buy this Book
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Qt5 C++ GUI Programming Cookbook

Qt5 C++ GUI Programming Cookbook

3 (4)
By: Eng
Buy this Book

Overview of this book

With the advancement of computer technology, the software market is exploding with tons of software choices for the user, making their expectations higher in terms of functionality and the look and feel of the application. Therefore, improving the visual quality of your application is vital in order to overcome the market competition and stand out from the crowd. This book will teach you how to develop functional and appealing software using Qt5 through multiple projects that are interesting and fun. This book covers a variety of topics such as look-and-feel customization, GUI animation, graphics rendering, implementing Google Maps, and more. You will learn tons of useful information, and enjoy the process of working on the creative projects provided in this book
Table of Contents (15 chapters)
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Preface
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Preface
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Who this book is for
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What this book covers
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To get the most out of this book
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Sections
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Get in touch
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1
Look-and-Feel Customization with Qt Designer
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Look-and-Feel Customization with Qt Designer
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Introduction
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Technical requirements
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Using style sheets with Qt Designer
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Customizing basic style sheets
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Creating a login screen using style sheets
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Using resources in style sheets
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Customizing properties and sub-controls
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Styling in Qt Modeling Language (QML)
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Exposing the QML object pointer to C++
2
Event Handling - Signals and Slots
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Event Handling - Signals and Slots
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Introduction
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Technical requirements
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New signals and slots syntax
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UI events with signals and slots
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Asynchronous programming made easier
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Function callbacks
3
States and Animations with Qt and QML
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States and Animations with Qt and QML
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Introduction
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Technical requirements
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Property animation in Qt
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Using easing curves to control property animation
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Creating an animation group
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Creating a nested animation group
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State machines in Qt
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States, transitions, and animations in QML
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Animating widget properties using animators
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Sprite animation
4
QPainter and 2D Graphics
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QPainter and 2D Graphics
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Introduction
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Technical requirements
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Drawing basic shapes onscreen
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Exporting shapes to SVG files
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Coordinate transformation
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Displaying images onscreen
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Applying image effects to graphics
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Creating a basic paint program
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Rendering a 2D canvas in QML
5
OpenGL Implementation
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OpenGL Implementation
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Introduction
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Technical requirements
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Setting up OpenGL in Qt
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Hello World!
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Rendering 2D shapes
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Rendering 3D shapes
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Texturing in OpenGL
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Basic lighting in OpenGL
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Moving an object using keyboard controls
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3D canvas in QML
6
Using Network and Managing Large Documents
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Using Network and Managing Large Documents
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Introduction
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Technical requirements
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Creating a TCP server
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Creating a TCP client
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Uploading and downloading files using FTP
7
Threading Basics - Asynchronous Programming
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Threading Basics - Asynchronous Programming
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Introduction
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Technical requirements
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Using threads
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QObject and QThread
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Data protection and sharing data between threads
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Working with QRunnable processes
8
Building a Touch Screen Application with Qt5
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Building a Touch Screen Application with Qt5
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Introduction
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Technical requirements
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Setting up Qt for mobile applications
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Designing a basic user interface with QML
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Touch events
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Animation in QML
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Displaying information using model/view
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Integrating QML and C++
9
XML Parsing Made Easy
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XML Parsing Made Easy
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Technical requirements
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Processing XML data using the stream reader
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Writing XML data using the Stream Writer
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Processing XML data using the QDomDocument class
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Writing XML data using the QDomDocument class
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Using Google's Geocoding API
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Conversion Library
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Conversion Library
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Introduction
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Technical requirements
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Converting data
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Converting images
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Converting videos
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Converting currency
11
Accessing Databases with SQL Driver and Qt
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Accessing Databases with SQL Driver and Qt
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Introduction
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Technical requirements
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Setting up a database
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Connecting to a database
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Writing basic SQL queries
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Creating a login screen with Qt
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Displaying information from a database on a model view
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Advanced SQL queries
12
Develop Web Applications using Qt WebEngine
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Develop Web Applications using Qt WebEngine
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Introduction
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Technical requirements
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Introducing Qt WebEngine
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Using WebView and web settings
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Embedding Google Maps in your project
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Calling C++ functions from JavaScript
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Calling JavaScript functions from C++
13
Performance Optimization
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Performance Optimization
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Introduction
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Technical requirements
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Optimizing form and C++
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Profiling and optimizing QML
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Rendering and animation
14
Other Books You May Enjoy
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Other Books You May Enjoy
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Leave a review - let other readers know what you think

Calling JavaScript functions from C++

In the previous example, we have learned how to call C++ functions from JavaScript through Qt's Web Channel system. In this example, we will try to do the reverse: call JavaScript functions from C++ code.

How to do it…

We can call JavaScript functions from C++ through the following steps:

  1. As usual, create a new Qt Widgets Application project and add the webengine and webenginewidgets modules to your project.

  2. Then, open up mainwindow.ui and remove the tool bar, menu bar, and status bar.

  3. After that, add a vertical layout and a horizontal layout to the canvas. Then, select the canvas and click Lay Out Vertically. Make sure the horizontal layout is located at the bottom of the vertical layout.

  4. Add two push buttons to the horizontal layout; one is called Change HTML Text and the other one is called Play UI Animation. Right-click on one of the buttons and click Go to slot…. A window will now pop up and ask you to pick a signal. Select the clicked() option and click...

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Qt5 C++ GUI Programming Cookbook
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