States, transitions, and animations in QML

If you prefer to work with QML instead of C++, Qt also provides similar features in Qt Quick that allow you to easily animate a GUI element with minimal lines of code. In this example, we will learn how to achieve this with QML.

How to do it…

Let’s get started by following these steps to create a window that continuously changes its background color:

1. We will create a new Qt Quick Application project and set up our user interface, like so:

Figure 3.7 – A joyful application that constantly changes its background color

2. Here is what my main.qml file looks like:

   import QtQuick
   import QtQuick.Window
   Window {
       visible: true
       width: 480;
       height: 320;
       Rectangle {
           id: background;
           anchors.fill...