title: How to set a delegate for a single cell in Qt item view?
body: <p>Rather perplexed by this omission--but in Qt's <a href="http://qt-project.org/doc/qt-5.0/qtwidgets/qabstractitemview.html#setItemDelegate">QAbstractItemView</a> class, it's possible to set a <a href="http://qt-project.org/doc/qt-5.0/qtwidgets/qabstractitemdelegate.html">QAbstractItemDelegate</a> (i.e., <a href="http://qt-project.org/doc/qt-5.0/qtwidgets/qitemdelegate.html">QItemDelegate</a> or <a href="http://qt-project.org/doc/qt-5.0/qtwidgets/qstyleditemdelegate.html">QStyledItemDelegate</a>) to the entire view, a single row, or a single column, using the <code>setItemDelegate*</code> methods.  In addition the item delegate for an individual cell can be queried, with <code>QAbstractItemView::itemDelegate(const QModelIndex&amp;)</code>, along with the delegate for rows, columns. and the entire view.  But there appears to be no way to <em>set</em> an item delegate to an individual cell.  Am I missing something?  Any reason this should be?</p>