public void UpdateFlattenedTree()
{
if (ExpTree == null || ExpTree.Root == null)
{
FlattenedTree = null;
return;
}
var ft = new ExpressionTreeTraversingCollection();
ft.UpdateRoot(ExpTree.Root);
FlattenedTree = ft;
}
void IDropTarget.Drop(IDropInfo dropInfo)
{
var target = dropInfo.TargetItem as IExpressionTreeNode;
if (target == null)
return;
var source = dropInfo.Data as IExpressionTreeNode;
if (source == null)
return;
if (source is PredicateNode && target is PredicateNode)
{
Tree.InjectInto(source, target);
}
else
{
throw new NotSupportedException();
}
// todo: do this as XamlVirutalizingCollection
var ft = new ExpressionTreeTraversingCollection();
ft.UpdateRoot(Tree.Root);
FlattenedTree = ft;
//FlattenedTree.UpdateRoot(Tree.Root);
}
