tooltip displaying current measure number when mouse over or drag Play Panel's position slider

I would like the play panel's position slider to display a popup tooltip indicating the measure number:

I realize the measure is already displayed in big font elsewhere in the play panel. But I think having the tooltip helps communication and helps when dragging to find the measure number you want.

pseudocode would be something along the lines of:

positionSlider->setTooltip(QString("Measure") + QString::number(measureCorrespondingTo(positionSlider->sliderposition())));