Make identical Top level windows cascade

In native mac applications, and on other platforms, opening windows of the same type on top of each other cascades nicely.

Qt Mac applications show() directly on top of each other.

It would be nice if they were offset automatically.

#include <QtGui> 

int main(int argc, char *argv[]) 
{ 
QApplication app(argc, argv); 
QMainWindow w1; 
QMainWindow w2; 
QMainWindow w3; 

w1.show(); 
w2.show(); 
w3.show(); 

return app.exec(); 
}