title: Right click contextMenu on QPushButton
body: <p>For my app I have created a GUI in Qt Designer and converted it into python(2.6) code.</p>
  
  <p>On some of the <code>QPushButton</code> (created with the designer) I want to add a right click context menu. The menu options depend on the application status.</p>
  
  <p>How to implement such a context menu ?</p>