How can I control visibilty of a row in a QML TreeView?

[Tuffa]

I would like to control the visibility of a row in a QML TreeView based on model data, say based on data in a particular role.

The only way of doing this appears to be: bind a condition to the RowDelegate's visible property, however it appears to be impossible to access model data from within a TreeView's rowDelegate.

I have exhausted Google. Or vice versa!

The nearest I think I have come is to use the TreeView's currentIndex property (see excerpt below), however when I examine the QModelIndex value received by the model's data() method, it reliably contains the following: QModelIndex(-1,-1,0x0,QObject(0x0)), which is not what I expect to see. Either this is a bug, or a TreeView's rowDelegate should not expect currentIndex to be set...

Any help gratefully received!

Chris.

TreeView {
   style:  TreeViewStyle {
      ...
      rowDelegate: Rectangle {
         property bool isVisible : treeView.isCurrentItemCached()
         visible: isVisible
      }
   }
   id: treeView
   ...
   function isCurrentItemCached() {
      if (contentManager.content.data(currentIndex, "name") != undefined) {
         return contentManager.content.data(currentIndex, "name") != “Random String”
      } else {
         return false
      }
   }
}

[Tuffa]

Ah, I think I need to use QSortFilterProxyModel.