title: C++ Qt - Can QSignalMapper be cleared and re-used?
body: <p>Consider a card game. Cards are drawn from a deck and displayed on screen. The cards are clickable, and lead to the same effect, so the use of <code>QSignalMapper</code> was obvious.</p>
  
  <p>Now, consider discarding those cards, to draw new ones.</p>
  
  <p>Is there a way to clear <code>QSignalMapper</code>, or is <code>QSignalMapper</code> automatically cleared when an object is removed from UI?</p>
  
  <p>I thought about <code>[QSignalMapper::removeMappings][1] ( QObject * sender )</code> but I am unsure about what 'sender' is.</p>