public void Remove(TreePosition pos)
{
// Remove all child nodes in reverse order and notify client of each removed child.
// This allows clients to keep track of all removed nodes, before the current node
// will be removed and invalidated.
for (int i = GetChildrenCount(pos) - 1; i >= 0; i--)
{
Remove(GetChild(pos, i));
}
NodePosition np = GetPosition(pos);
np.ParentList.RemoveAt(np.NodeIndex);
var parent = np.ParentList.Parent;
var index = np.NodeIndex;
version++;
if (NodeDeleted != null)
{
NodeDeleted(this, new TreeNodeChildEventArgs(parent, index, pos));
}
}
public TreePosition InsertAfter(TreePosition pos)
{
NodePosition np = GetPosition(pos);
Node nn = new Node();
nn.NodeId = nextNodeId++;
np.ParentList.Insert(np.NodeIndex + 1, nn);
version++;
// Update the provided position is still valid
np.StoreVersion = version;
var node = new NodePosition()
{
ParentList = np.ParentList, NodeId = nn.NodeId, NodeIndex = np.NodeIndex + 1, StoreVersion = version
};
if (NodeInserted != null)
{
NodeInserted(this, new TreeNodeEventArgs(node));
}
return(node);
}
public TreePosition GetChild(TreePosition pos, int index)
{
if (pos == null)
{
if (rootNodes.Count == 0)
{
return(null);
}
Node n = rootNodes[index];
return(new NodePosition()
{
ParentList = rootNodes, NodeId = n.NodeId, NodeIndex = index, StoreVersion = version
});
}
else
{
NodePosition np = GetPosition(pos);
Node n = np.ParentList[np.NodeIndex];
return(new NodePosition()
{
ParentList = n.Children, NodeId = n.Children[index].NodeId, NodeIndex = index, StoreVersion = version
});
}
}