public void AddChildren(IEnumerable <ITreeItem> children)
{
List <ITreeItem> added = new List <ITreeItem>();
foreach (ITreeItem child in children)
{
if (Add(child, false))
{
added.Add(child);
}
}
if (added.Count > 0)
{
TreeItemChildrenAddEventArgs args =
new TreeItemChildrenAddEventArgs(added);
ChildrenAdded?.Invoke(this, args);
}
}
private bool Add(ITreeItem item, bool sendEvent)
{
if (!children.Contains(item))
{
children.Add(item);
item.Parent = this;
if (sendEvent)
{
TreeItemChildrenAddEventArgs args =
new TreeItemChildrenAddEventArgs(new List <ITreeItem>()
{
item
});
ChildrenAdded?.Invoke(this, args);
}
return(true);
}
return(false);
}