public NestedMenu()
{
DataContext = this;
Nodes = new ObservableCollection<AbstractNode>();
Path = new ObservableCollection<Node>();
InitializeComponent();
var r1 = new Node() { Name = "Root 1" };
r1.Children.Add(new Leaf() { Name = "Leaf", Parent=r1 });
r1.Children.Add(new Node() { Name = "Node 1", Parent=r1 });
var r2 = new Node() { Name = "Root 2" };
r2.Children.Add(new Leaf() { Name = "Leaf 2", Parent=r2 });
r2.Children.Add(new Node() { Name = "Node 3", Parent=r2 });
Nodes.Add(r1);
Nodes.Add(r2);
var megaroot = new Node() { Name = "Home" };
megaroot.Children.Add(r1);
megaroot.Children.Add(r2);
r1.Parent = megaroot;
r2.Parent = megaroot;
SelectedNode = megaroot;
Path.Add(megaroot);
}
public void Back()
{
if (SelectedNode == null || SelectedNode.Parent == null)
return;
Path.Remove(SelectedNode);
SelectedNode = SelectedNode.Parent as Node;
}
public void Navigate(AbstractNode destinationNode)
{
Node node = destinationNode as Node;
Leaf leaf = destinationNode as Leaf;
if (node != null)
{
Path.Add(destinationNode);
SelectedNode = node;
}
if (leaf != null)
{
// NavigationService invoke
}
}
public DynamicNestedMenu2()
{
Nodes = new ObservableCollection<AbstractNode>();
Path = new ObservableCollection<AbstractNode>();
//SelectedNode =
var r1 = new Node() { Name = "Root 1" };
r1.Children.Add(new Leaf() { Name = "Leaf" });
r1.Children.Add(new Node() { Name = "Node 1" });
var r2 = new Node() { Name = "Root 2" };
r2.Children.Add(new Leaf() { Name = "Leaf 2" });
r2.Children.Add(new Node() { Name = "Node 3" });
Nodes.Add(r1);
Nodes.Add(r2);
SelectedNode = new Node() { Name = "MegaRoot" };
SelectedNode.Children.Add(r1);
SelectedNode.Children.Add(r2);
}
private static void NodesChanged(object sender, DependencyPropertyChangedEventArgs e)
{
var oldValue = e.OldValue as ObservableCollection<AbstractNode>;
if(oldValue!=null)
oldValue.CollectionChanged -= CollectionChanged;
var newValue = e.NewValue as ObservableCollection<AbstractNode>;
if(newValue!=null)
newValue.CollectionChanged += CollectionChanged;
var control = sender as NestedMenu;
if (control != null && control.Path != null)
{
var root = new Node() { Name = "Home" };
foreach (var node in newValue)
root.Children.Add(node);
control.Path.Clear();
control.SelectedNode = root;
control.Path.Add(root);
}
}
public bool IsAnchestor(Node anchestor, Node node)
{
var parent = node.Parent as Node;
if (parent != null && parent == anchestor)
return true;
else
if (node.Parent == null)
return false;
else
return IsAnchestor(anchestor, parent);
}
public void Back(Node destinationNode)
{
foreach (var node in Path.ToList())
if (IsAnchestor(destinationNode, node))
Path.Remove(node);
SelectedNode = destinationNode;
}
