QPropertyAnimation and QGraphicsObject.

blackbelt

I was look for a list of supported QPropertyAnimation for the QGraphicsObject. I need to apply a "scale animation" to the QGraphicsObject. Is it possible?

tcampos

Yes, indeed. Try something like this:

@QPropertyAnimation *animation = new QPropertyAnimation(graphicsObject, "scale");
animation->setDuration(animationTimeMs);

animation->setKeyValueAt(0.0, 1.0);
animation->setKeyValueAt(0.5, 2.0);
animation->setKeyValueAt(1.0, 1.0);

// You can also use interpolation:
// animation->setEasingCurve(QEasingCurve::InOutQuint);

animation->start(QAbstractAnimation::DeleteWhenStopped);@

blackbelt

Thank you. Indeed it is quite simple. can QPropertyAnimation used in combination with QAnimationGroup in order to translate and scale the same QGraphicsObject. I could see the scale property but nothing about translate. Should I go with the x and y properties?

Thank you

blackbelt

Another questiom @QAbstractAnimation::DeleteWhenStopped@ means that the Animation itself will deallocate from the heap when it finished, or Should I care to delete the animation instance?

tcampos

I think you can use the property "pos" or even "geometry" for that kind of operations instead of using "scale".
Take a look at the reference:
http://doc.qt.nokia.com/4.7/qpropertyanimation.html

I never used QAnimationGroup but reading the reference it seems that it can be used there...

And yes, @QAbstractAnimation::DeleteWhenStopped@ deletes the animation when finished.

blackbelt

ok, thank you....