QML ListView currentItem doesn't change after a sort

[Beacon11]

Hello. I have a ListView tied to a QAbstractListModel in C++ by way of a QSortFilterProxyModel so the list contents can be sorted (dynamic sorting is enabled).

My problem is simple:
Say the ListView contains the following items:

0: A
1: B
2: C

B is selected, and thus highlighted, so the currentIndex is 1 and the currentItem is B. Suddenly, the list is sorted to be:

0: A
1: C
2: B

And the ListView shows this. However, the currentIndex is still 1, which means the currentItem is now C and the highlight moves from B to C.

My question is simple: what is the best way to ensure that if B is selected before the sort, B is still selected after the sort?

[Beacon11]

Really what this comes down to is this: if the ListView knew when an item was moved (e.g. sorted), I could run a function to loop through its children and make sure the right item (the models have IDs associated with them) is selected. Unfortunately, according to http://lists.qt.nokia.com/public/qt-qml/2010-September/001149.html , it seems ListViews have no way of knowing when something is moved. Does that sound accurate? This seems like a HUGE limitation if true.

[Beacon11]

I figured this out... but my solution was pretty nasty. The only way to ensure the right delegate was selected was to re-check which one was selected every time the layout changed (since the layout obviously has to change if the items are re-sorted).

Below is a snippet of what I did. There has to be a better way!

Note that "modelId" is a role on the model.

@Component
{
id: myDelegate

  Column
  {
     id: column

     Component.onCompleted:
     {
        myListView.setSelected.connect(handleSetSelected)
     }

     // If we don't disconnect from the signal the handler will still be called
     // on destroyed components and errors will be thrown about undefined
     // variables.
     Component.onDestruction:
     {
         myListView.setSelected.disconnect(handleSetSelected)
     }

     function setSelected()
     {
        myListView.setCurrentItem(index, modelId);
     }

     function handleSetSelected(modelIdToBeSelected)
     {
        if (modelId === modelIdToBeSelected)
        {
           setSelected();
        }
     }

     // More delegate stuff...
  }

}

ListView
{
property int currentModelId: 0

  signal setSelected(int modelId)

function setCurrentItem(index, modelId)
{
currentIndex = index;
currentModelId = modelId;
}

  id: myListView
  objectName: "MyList"
  model: myModel
  delegate: myDelegate

  // Signal handlers
  Connections
  {
     target: myModel

     onLayoutChanged:
     {
        myListView.setSelected(myListView.currentModelId)
     }
  }

}@