title: QMainWindow that ignore clicks, passes them on to background windows
body: <p>I'd like to create a semi-transparent information window that doesn't get in the way of the user's other activities. Any clicks on the window should just pass through as if the window wasn't there.</p>
  
  <p>How would you recommend implementing such behavior? Is there an easy way to do it or do I have to follow a clumsy workaround? I'm thinking of hiding the window, re-executing the click, then making the window visible again. But this would still screw up drag'n'drop gestures.</p>