QAnimation framework: which property to use here

Question

Latest Qt Creator has a animation effect on start , the widget shows from darker to lighter , I don't know which property I should use with Qt's animation framework , to make something similar ?

UPDATE

Ok , i tried to use windowOpacity animation:

QPropertyAnimation *anim = new QPropertyAnimation(this, "windowOpacity", this);
connect(anim, SIGNAL(finished()), SLOT(animationFinished()));

anim->setDuration(1000);
anim->setStartValue(0.0);
anim->setEasingCurve(QEasingCurve::InOutQuad);
anim->setEndValue(1.0);

anim->start(QPropertyAnimation::DeleteWhenStopped);

But , when I disabled "Display compositing" in XFWM4 , the effect wasn't working , but QtCreator still have that.

Answer 1

Here's a list of properties

Maybe you are looking for the windowOpacity one?

This question/answer might help you