Let's create an animation group by following these steps:

1. We will use the previous example but, this time, we will add two more push buttons to the main window, as shown in the following screenshot:

2. Define the animation for each of the push buttons in the main window's constructor:

QPropertyAnimation *animation1 = new QPropertyAnimation(ui->pushButton, "geometry");
animation1->setDuration(3000);
animation1->setStartValue(ui->pushButton->geometry());
animation1->setEndValue(QRect(50, 200, 100, 50));

QPropertyAnimation *animation2 = new QPropertyAnimation(ui->pushButton_2, "geometry");
animation2->setDuration(3000);
animation2->setStartValue(ui->pushButton_2->geometry());
animation2->setEndValue(QRect(150, 200, 100, 50));

QPropertyAnimation *animation3 = new QPropertyAnimation(ui->pushButton_3, "geometry");
animation3->setDuration(3000);
animation3->setStartValue(ui->pushButton_3->geometry());
animation3->setEndValue(QRect(250, 200, 100, 50));

3. Create an easing curve and apply the same curve to all three animations:

QEasingCurve curve;
curve.setType(QEasingCurve::OutBounce);
curve.setAmplitude(1.00);
curve.setOvershoot(1.70);
curve.setPeriod(0.30);

animation1->setEasingCurve(curve);
animation2->setEasingCurve(curve);
animation3->setEasingCurve(curve);

4. Once you have applied the easing curve to all three animations, we will then create an animation group and add all three animations to the group:

QParallelAnimationGroup *group = new QParallelAnimationGroup;
group->addAnimation(animation1);
group->addAnimation(animation2);
group->addAnimation(animation3);

5. Call the start() function from the animation group we just created:

group->start();