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

View More author details

Table of Contents (11) Chapters

Preface

1. Look and Feel Customization

2. States and Animations FREE CHAPTER

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

Hello world!

In this recipe, we will learn about the pipeline of OpenGL and how to render a simple shape to the window. We will continue from the example project used in the previous recipe.

How to do it…

First of all, go to mainwindow.h and add the following headers at the top of the source code:

#include <QSurfaceFormat>
#include <QOpenGLFunctions>
#include <QtOpenGL>
#include <GL/glu.h>

Next, declare two private variables in mainwindow.h:

private:
  QOpenGLContext* context;
  QOpenGLFunctions* openGLFunctions;

After that, move over to mainwindow.cpp and set the surface format to compatibility profile. We also set the OpenGL version to 2.1 and create the OpenGL context using the format we just declared. Then, use the context we just created to access the OpenGL functions that are relevant only to the OpenGL version we have just set, by calling context->functions():
```
MainWindow::MainWindow(QWidget *parent)
{
  setSurfaceType(QWindow::OpenGLSurface);
  QSurfaceFormat...
```

The rest of the chapter is locked

Tech Concepts

Programming languages

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.

Unlock this book and the full library FREE for 7 days

Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of

Start free trial

Renews at €18.99/month. Cancel anytime

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.

See other products by Lee Zhi Eng