title: Qt menu without shaodw?
body: <p>I copied the question description below from other asked but not answered question, because this is the extractly the same one I wanna ask.</p>
  
  <p>I have a QMenu with a translucent background and rounded edges (border-radius). Unfortunately, Windows 7 draws a drop shadow for this menu, which does not fit to the rounded edges. Its the shadow that would be drawn for normal rectangular menues.</p>
  
  <p>Is there either - a way to completely disable drawing drop shadows for QMenu or - a way to make the shadow fit to the rounded edges ?</p>
  
  <p>Here is a minimalistic example where it occurs:</p>
  
  <pre><code>QPushButton b("press me");
  QMenu m;
  m.addAction("hello"); m.addAction("world");
  m.setWindowFlags(m.windowFlags() | Qt::FramelessWindowHint);
  m.setAttribute(Qt::WA_TranslucentBackground);
  m.setStyleSheet("background:rgba(255,0,0,50%); border-radius:5px;");
  b.setMenu(&amp;m);
  b.show();
  </code></pre>
  
  <p>Right now I have to turn off the menu shadow in Windows Control panel manually to get rid that shadow. 
  Actually what I want to archive,is a menu like qt's pie menu ,or the menu like so:
  <a href="http://upload.wikimedia.org/wikipedia/commons/8/85/Blender_2.36_Screenshot.jpg" rel="nofollow">http://upload.wikimedia.org/wikipedia/commons/8/85/Blender_2.36_Screenshot.jpg</a>
  I tried the popup widget, but it gets the shadow artifact descripted above.
  Anyone could helps this out? </p>