/// <summary>
/// Removes a child from this object.
/// </summary>
/// <param name="child">The child to be removed from this parent.</param>
public void RemoveChild(object child)
{
ITreeNode node = CreateNodeWrapper(child); // TODO: This might not remove correctly.
if (!IsReadOnly)
{
if (m_children == null || (!m_children.Contains(node)))
{
return;
}
OnAboutToLoseChild?.Invoke(this, node);
((TreeNodeHelper)node).AboutToBeRemoved(((TreeNodeHelper)node));
m_children.Remove(node);
if (m_autoIndex)
{
ITreeNodeProxy tnp = (ITreeNodeProxy)node;
SimCore.IHasIdentity ihi = (SimCore.IHasIdentity)tnp.Ward;
m_childFinder.Remove(ihi.Guid);
}
OnLostChild?.Invoke(this, node);
((TreeNodeHelper)node).WasRemoved(((TreeNodeHelper)node));
}
else
{
ReadOnlyAccessViolation("RemoveChild");
}
}
/// <summary>
/// Adds a child to this object. If the TreeNodeHelper is set to autoIndex, the new child
/// must be an implementer of IHasIdentity, and will be indexed into the list of children.
/// </summary>
/// <param name="newChild">The child to be added to this parent.</param>
/// <returns>The TreeNodeHelper that wraps the new child.</returns>
public ITreeNode AddChild(object newChild)
{
ITreeNode node = CreateNodeWrapper(newChild);
if (!IsReadOnly)
{
OnAboutToGainChild?.Invoke(this, node);
if (m_children == null)
{
m_children = new ArrayList();
}
m_children.Add(node);
node.Parent = this;
if (m_autoIndex)
{
if (m_childFinder == null)
{
m_childFinder = new Hashtable();
}
ITreeNodeProxy tnp = (ITreeNodeProxy)node;
SimCore.IHasIdentity ihi = (SimCore.IHasIdentity)tnp.Ward;
//if ( m_childFinder.Contains(ihi.Guid) ) Console.WriteLine();
m_childFinder.Add(ihi.Guid, tnp);
}
OnGainedChild?.Invoke(this, node);
}
else
{
ReadOnlyAccessViolation("AddChild");
}
return(node);
}