Get intermediate color from a gradient

Question

Say I have a liner gradient as shown:

QLinearGradient linearGrad(QPointF(0, 0), QPointF(0, 100));
linearGrad.setColorAt(1, Qt::red);
linearGrad.setColorAt(0.5, Qt::yellow);
linearGrad.setColorAt(0, Qt::green);

How to get the color of the point QPointF(0, 28.5) in this gradient?

Indeed I want to have this kind of color distribution to be able to choose intermediate colors. I don't care if it is done by using QLinearGradient or something else.

Answer 1

QVariantAnimation has the similar functionality, and QVariantAnimation::keyValueAt can return the value you need. You may step into the code of QVariantAnimation and see how keyValueAt works.

Answer 2

I don't believe this is possible with QGradient. I just rolled my own code when I met this situation.