title: Access a Delegate out of a Model
body: <p>I'm using a QTreeView which has an own model for drawing icons, showing texts and other things more.</p>
  
  <p>Next for some cells of this tree I have added a QComboBox via a delegate which works fine.</p>
  
  <p>Now my problem: when the user selects a value from the QComboBox, this newly selected value is not shown in the cell afterwards, it is empty. From what I understand this happens because the model has to return the current value out of data() -> Qt::DisplayRole. But: how can I access the delegate and the correct QComboBox from my model to get the current value? Or what else is the correct way to display the selected combobx-value in the cell?</p>
  
  <p>Thanks!</p>