title: Why getToolTipText is never called?
body: <p>I have got a JComponent. The paintComponent method is overridden. I mentioned that tooltips were not occuring reliable. Sometimes they were displayed and sometime they didn't. Now I don't see tooltips anymore on this component. I overwrote getToolTipText(MouseEvent e) to specify the contents of the tooltips. But the methods getToolTipText() and getToolTipText(MouseEvent e) are never called! </p>
  
  <p>What could be wrong here?
  What can I do to fix it?</p>