You're reading from Qt5 C++ GUI Programming Cookbook Design and build a functional, appealing, and user-friendly graphical user interface

Product type Paperback

Published in Jul 2016

Publisher Packt

ISBN-13 9781783280278

Length 300 pages

Edition 1st Edition

Languages

C++

Tools

Concepts

GUI Application Development

Author (1):

Lee Zhi Eng

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Table of Contents (11) Chapters

Preface

1. Look and Feel Customization FREE CHAPTER

2. States and Animations

3. QPainter and 2D Graphics

4. OpenGL Implementation

5. Building a Touch Screen Application with Qt5

6. XML Parsing Made Easy

7. Conversion Library

8. Accessing Databases

9. Developing a Web Application Using Qt Web Engine

Index

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:

As usual, create a new Qt Widgets Application project and add the webengine and webenginewidgets modules to your project.
Then, open up mainwindow.ui and remove the tool bar, menu bar, and status bar.
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.
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...

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Authors (1)

Lee Zhi Eng

Lee Zhi Eng is a self-taught programmer who worked as an artist and programmer at several game studios before becoming a part-time lecturer for 2 years at a university, teaching game development subjects related to Unity and Unreal Engine. He has not only taken part in various projects related to games, interactive apps, and virtual reality but has also participated in multiple projects that are more oriented toward software and system development. When he is not writing code, he enjoys traveling, photography, and exploring new technologies.

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