title: How to display a QMenu on a QAction trigger
body: <p>I Have a (QT) toolbar in my application which is populated by QAction objects, and one of the QActions has an associated menu. I would like to pop up that menu below the QActions' button when the action is triggered.</p>
  
  <p>I have tried:</p>
  
  <pre><code>m_ui-&gt;action_NewDataType-&gt;menu()-&gt;show();
  </code></pre>
  
  <p>but this shows the menu on the left upper corner of the screen, instead of where I want it. How can I show the menu below the QAction button, nicely aligned to the edges of the button?</p>