/// <summary>
/// Exception handling error mechanism in place.
/// </summary>
/// <param name="child"></param>
private void AddChild(AManaged child)
{
OnPreAddChild(child);
_children.Add(child);
}
/// <summary>
///
/// </summary>
/// <param name="child"></param>
private void RemoveChild(AManaged child)
{
OnPreRemoveChild(child);
_children.Remove(child);
}
protected virtual void OnPreRemoveChild(AManaged child)
{
}
protected virtual void OnPreAddChild(AManaged child)
{
}
// This needs to be a separate call so that the children can define precisely when to attach to parent.
protected void Initialize(AManaged parent, string name)
{
// Keep this order, the _parent assigned first, then the _parent.AddChild.
_parent = parent;
_name = name;
if (_parent != null)
{
_parent.AddChild(this);
}
}
/// <summary>
/// When cloning, new item is not assigned to original item's parent.
/// New created item is left to exist freely.
/// </summary>
/// <param name="managed"></param>
protected void CloneTo(AManaged managed)
{
managed._name = _name;
managed._closed = _closed;
// foreach(AManaged child in this.Children)
// {
// AManaged newChild = (AManaged)child.Clone();
// newChild._parent = managed;
// managed.AddChild(newChild);
// }
}
private void SynchronizeCollectionWithNode(TreeNode parentNode, int startingIndex, AManaged[] items)
{
for (int i = startingIndex; i < items.Length + startingIndex; i++)
{
AManaged item = items[i - startingIndex];
if (parentNode.Nodes.Count > i && parentNode.Nodes[i].Tag == item)
{// Node with this index exists and is proper one.
parentNode.Nodes[i].ImageIndex = item.ImageIndex;
parentNode.Nodes[i].SelectedImageIndex = item.ImageIndex;
parentNode.Nodes[i].Text = item.Name;
}
else
{// No existing node or improper one.
if (parentNode.Nodes.Count > i)
{// This is invalid existing node, remove.
parentNode.Nodes.RemoveAt(i);
}
TreeNode newNode = new TreeNode(item.Name, item.ImageIndex, item.ImageIndex);
newNode.Tag = item;
parentNode.Nodes.Add(newNode);
}
// Recursively synchronize the children.
SynchronizeCollectionWithNode(parentNode.Nodes[i], 0, item.ChildrenArray);
}
for (int j = items.Length + startingIndex; j < parentNode.Nodes.Count; j++)
{// Clean up the remaining nodes that are no longer valid.
parentNode.Nodes.RemoveAt(j);
}
}