title: How to show QAbstractTableModel's status in a QStatusBar?
body: <p>I have my custom implementation of QAbstractTableModel and of QSortFilterProxyModel, used for filtering. The table is shown in a QTableView.</p>
  
  <p>The parent dialog of my QTableView has a QStatusBar, with a read-only QLineEdit widget.</p>
  
  <p>In my overriding data() method of QAbstractTableModel, I'm setting the pertinent values for the Qt::StatusTipRole role. </p>
  
  <p>Now I'm missing part of the plumbing: how do I get my per-cell StatusTipRole data to show up in my widget inside QStatusBar?</p>