protected override void OnBeforeExpand(VirtualTreeViewCancelEventArgs e)
{
if (TopNode == null)
{
_persistedTopNode = new List <object>();
}
else
{
_persistedTopNode = TopNode.GetPersistenceInfo().Path;
}
base.OnBeforeExpand(e);
}
/// <summary>
/// We have to be a bit more clever now, as things can appear
/// more than once in the treeview (ie Group by tag)
///
/// Therefore we try and keep selection on the correct
/// object, even during migration or moving between folders.
/// In the case we can't, we default to its parent and its
/// parent's parent and so on.
/// </summary>
public new void BeginUpdate()
{
// Save the selection...
_persistedSelectionInfo = new List <VirtualTreeNode>(SelectedNodes).ConvertAll(n => n.GetPersistenceInfo());
// Save the scroll position..
if (TopNode == null)
{
_persistedTopNode = new List <object>();
}
else
{
_persistedTopNode = TopNode.GetPersistenceInfo().Path;
}
}
