title: Use Combo boxs as label of the every columns(TableView)
body: <p>How can I use a combo box as the header of columns?</p>
  
  <p>I think know I need to use <code>setHorizontalHeader(QHeaderView)</code> but How can I use <code>QAbstractItemModel</code> to make a comboBox model for <code>QHeaderView.setModel(QAbstractItemModel)</code> ,so I can use it for <code>setHorizontalHeader(QHeaderView)</code> ?</p>
  
  <p>or Do I need to use <code>QItemDelegate</code>?</p>