Using Qt 4.8.5

I want a dynamic data model for a QCompleter installed in a QLineEdit. I connect the QLineEdit::textEdited signal to my own function that updates the model, which is my sub-class of QAbstractListModel. It begins as an empty model, but fills itself out on the third keystroke. No completions occur. If I full populate the model when constructed, all works. See code below. I do not know how to notify the QCompleter that the model has changed. I used 'beginResetModel()/endResetModel()' as a try.

Qt Code: 
  1. // This slot is connected to the QLineEdit::textEdited signal.
  2. void MyaNameModel::Update(const QString &text)
  3. {
  4.   if (text.size() < 3)
  5.   { if (!names.empty())
  6.     { m_names.clear();   // Clear data model's collection of names.
  7.  
  8.       // Notify QCompleter that model has changed.
  9.       beginResetModel();
  10.       endResetModel();
  11.     }
  12.   } 
  13.   else if (m_names.empty())
  14.   { // This extracts information from an external repository via in-house API.
  15.     // It fills the container of names.
  16.     m_ap.MatchChannel(Glob((text + "*").toAscii().data()), m_names);
  17.  
  18.     // Notify QCompleter that model has changed.
  19.     beginResetModel();
  20.     endResetModel();
  21.   }
  22.  }
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