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

State machines in Qt

State machines can be used for many purposes, but in this chapter we will only cover topics related to animation.

How to do it…

First, we will set up a new user interface for our example program, which looks like this:

Next, we will include some headers in our source code:

#include <QStateMachine>
#include <QPropertyAnimation>
#include <QEventTransition>

After that, in our main window's constructor, add the following code to create a new state machine and two states, which we will be using later:
```
QStateMachine *machine = new QStateMachine(this);
QState *s1 = new QState();
QState *s2 = new QState();
```
Then, we will define what we should do within each state, which in this case will be to change the label's text, as well as the button's position and size:
```
QState *s1 = new QState();
s1->assignProperty(ui->stateLabel, "text", "Current state: 1");
s1->assignProperty(ui->pushButton, "geometry", QRect...
```

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Qt5 C++ GUI Programming Cookbook

Published in: Jul 2016

Publisher: Packt

ISBN-13: 9781783280278

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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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