how to know window is open in qt [closed]

Question

I have created two Main windows. How to know whether 2nd window is open in QT?

QMainWindow *window1 = new QMainWindow();

QMainWindow *window2 = new QMainWindow();

Now I have to find whther window2 is already opened in my one instance. How to know it

Answer 1

You can use the visible property:

if (window2->isVisible()) {
   ...
}