OpenCV: how to force the image window to appear on top of other windows?

Question

Using cvShowImage, one can easily show an image in OpenCV. However, how do you tell OpenCV to show the window on top of every other window?

I run a ful

Answer 1

On MAC-OSX (El Capitan) OpenCV 3.1.0, calling moveWindow seems to bring the window just moved to the top.