title: Difference between transient parent and parent in qt
body: <p>I got confused with parent and transient parent in qt.</p>
  
  <ol>
  <li>Whether for same window is it possible to have both transient and parent ?</li>
  <li>For Top level window (widgets like Popup) transient parents are set and parent set to NULL ?</li>
  </ol>
  
  <p>Can you please share clear idea about parent and transient parent in qt.</p>