title: FocusIn/FocusOut not generated
body: <p>Can someone please clarify the default focus handling of the X11 server? My understanding is that the focus 'follows the mouse' and sure enough if I move the mouse between separate terminals I can see the cursor changing as each window aquires/loses the focus.</p>
  
  <p>But when I run two xev windows and move the pointer between them, I see plenty of MotionNotify/EnterNotify/LeaveNotify as the pointer moves from one window to another - but FocusIn and FocusOut are nowhere to be seen. Is this an oddity in xev? Is there some special mask or property which needs to be applied in order for these events to be generated?</p>
  
  <p>Many thanks, R.</p>
  
  <p>While I do not fully understand the answer(s), I am grateful to parkydr, minitech and any others who may have stopped by.</p>
  
  <p>Thanks again, R.</p>