public bool MoveToFirstChild()
{
if (_current.Items == null || _current.Items.Count == 0)
{
return(false);
}
_current = _current.Items[0];
return(true);
}
public bool MoveToParent()
{
if (_current.Parent != null)
{
_current = _current.Parent;
return(true);
}
return(false);
}
private bool MoveTo(NavigatorTreeItem node, Func <TreeItem, bool> comparer)
{
if (comparer(node.Current))
{
_current = node;
return(true);
}
foreach (var item in node.Items)
{
if (MoveTo(item, comparer))
{
return(true);
}
}
return(false);
}
private NavigatorTreeItem Init(TreeItem current, NavigatorTreeItem parent)
{
var tree = new NavigatorTreeItem
{
Current = current,
Parent = parent,
};
if (current.Items != null)
{
foreach (var item in current.Items)
{
tree.Items.Add(Init(item, tree));
}
}
return(tree);
}
public bool MoveToChild(Func <TreeItem, bool> comparer)
{
if (_current.Items == null || _current.Items.Count == 0)
{
return(false);
}
foreach (var item in _current.Items)
{
if (comparer(item.Current))
{
_current = item;
return(true);
}
}
return(true);
}
public TreeNavigator(TreeItem tree)
{
_tree = Init(tree, null);
_current = _tree;
}
