How to check if an opencv window is closed

Question

How do you check if an opencv window has been closed?

I would like to do:

cvNamedWindow(\"main\", 1);

while(!cvWindowIsClosed(\"main\"))
{
    cvSho         


        

Answer 1

In Python OpenCV version 3.4.2, Ubuntu Bionic, cv2.getWindowProperty('Main', cv2.WND_PROP_VISIBLE) returns a floating 0.0 (zero) when the window is closed and 1.0 (one) when it's open, whether see-able or not. Yes, still a 1.0 when it's minimized or behind another window or on a different desktop.