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//! [typedef]
qreal myEasingFunction(qreal progress);
//! [typedef]

//! [0]
    QEasingCurve easing(QEasingCurve::InOutQuad);

    for (qreal t = 0.0; t < 1.0; t += 0.1)
        qWarning() << "Effective progress" << t << "is"
                   << easing.valueForProgress(t);
//! [0]

//! [1]
    QPropertyAnimation animation;
    animation.setStartValue(0);
    animation.setEndValue(1000);
    animation.setDuration(1000);
    animation.setEasingCurve(QEasingCurve::InOutQuad);
//! [1]