title: QMainWindow - wait until 'show' function is done
body: <p>Is there a signal that tells when 'show' function finishes?</p>
  
  <p>I have a problem in my code: If I write:</p>
  
  <pre><code>QMainWinObj.show();
  QMainWinObj.someGuiFunc();
  </code></pre>
  
  <p>the code doesn't work. But, if I write:</p>
  
  <pre><code>QMainWinObj.show();
  sleep(3000);
  QMainWinObj.someGuiFunc();
  </code></pre>
  
  <p>It does.</p>
  
  <p>So I think the problem is that 'show' dosn't finish its jub before I call 'someGuiFunc'. That's why I want to have some kind of a sign that 'show' is finished..</p>