WindowStaysOnTopHint

[roxton]

Hello! I want to implement a simple function to toggle normal window/on top state. For this, I write this code:

Qt::WindowFlags f = 0;
 
  Qt::WindowFlags flags = windowFlags ();
  if (flags & Qt::WindowStaysOnTopHint)
      f = Qt::Window;
  else
      {
       f = Qt::Window;
       f |= Qt::WindowStaysOnTopHint;
      }
  setWindowFlags (f);

Qt::WindowFlags f = 0;

  Qt::WindowFlags flags = windowFlags ();
  if (flags & Qt::WindowStaysOnTopHint)
      f = Qt::Window;
  else
      {
       f = Qt::Window;
       f |= Qt::WindowStaysOnTopHint;
      }
  setWindowFlags (f);

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But when I run it, the window just disappears.