WindowStaysOnTopHint

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

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);

---

But when I run it, the window just disappears.

If you want to toggle one flag use this code:

Code:

---

Qt::WindowFlags flags = windowFlags();
flags ^= Qt::WindowStaysOnTopHint;
setWindowFlags( flags );

---

But the window disappears anyway!
I'm trying to apply this "toggle" to the main window.
P.S.: Qt 4.4, Linux

Update:
This code works fine ,and the window is visible:

Code:

---

Qt::WindowFlags flags = windowFlags();
  flags ^= Qt::WindowStaysOnTopHint;
  setWindowFlags( flags );
  show();
  activateWindow();

---

The documentation for setWindowFlags() states that it calls setParent(), which in turn documents that it hides the window, necessitating the call to show(). But it appears you discovered that.

I have another question related to WindowStaysOnTopHint. I notice that when I toggle the option on my top level widget (by means of a checkbox in the window itself), the widget is automatically repositioned on the screen. It's harmless but annoying. Is there a simple way to suppress that repositioning action?

Quote:

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Originally Posted by McKee

The documentation for setWindowFlags() states that it calls setParent(), which in turn documents that it hides the window, necessitating the call to show(). But it appears you discovered that.

I have another question related to WindowStaysOnTopHint. I notice that when I toggle the option on my top level widget (by means of a checkbox in the window itself), the widget is automatically repositioned on the screen. It's harmless but annoying. Is there a simple way to suppress that repositioning action?

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I don't know, but my guess is maybe by reimplementing the paint function (paintEvent()?) and set a position you want it to be drawn an then call its parents paint function

But using

Code:

---

Qt::WindowFlags flags = windowFlags();
        flags ^= Qt::WindowStaysOnTopHint;
        setWindowFlags( flags );
        show();
        activateWindow();

---

the window remains on the top of all running applications. what if we just want it to be bound with my application and not other applications running.

When i press ALT + Tab the window whose flag was set remains on top of new application..this is not what is expected..

What can be done to avoid this behavior and retaining WindowStaysOnTopHint?