Very simple C++ tree data structure for use with Arduino

I need a very simple tree data structure that will compile in Arduino IDE. The tree will hold a menu structure that will contain a LIMITED maximum number of items (nodes). I need properties and methods that will allow me to know the currently focused node and list the nodes in each branch. Each node needs to have an assignable method that will be activated when needed. If you are not familiar with Arduino IDE, you can take a look at the attached source code ([login to view URL]) which works well in Arduino, it just does not suit my purposes very well. But I like it is object oriented, so I wish it would be based on a similar style of coding. I need an object for the tree (MenuTree) and objects for the menu items (MenuNode). MenuTree should have the following methods and properties: RootNode - MenuNode that is a parent of all the child nodes (created by default) FocusedNode - MenuNode holding a pointer to the currently selected node UpdatingInProgress - set to true before adding major number of nodes AddChildNode(MenuNode, ParentNode) - adds a node to the tree, if ParentNode is null, add RootNode instead GetNextFocusableNode(MenuNode) - returns the next node (down the branch) that can be focused (based on CanFocus property of the MenuNode), null if this is the last node that can be focused GetPreviousFocusableNode(MenuNode) - returns the previous node (up the branch) that can be focused (based on CanFocus property of the MenuNode), null if this is the last node that can be focused Password - byte PasswordEntered - boolean PasswordTimeout - time in seconds when the password expires, default 1800 seconds PasswordExpired - event that fires when the password expires, also sets PasswordEntered to false MenuRedraw - event that fires when some of the properties of the MenuNode change, unless UpdatingInProgress is true ForceRedraw - method that fires MenuRedraw MenuNode should have the following methods and properties: ChildCount - number of direct child nodes of this node, read-only FirstChild - pointer to the first child node, read-only NextSibling - pointer to the next sibling node (down the branch); returns null if the node is last node in the branch, read-only PreviousSibling - pointer to the previous sibling node (up the branch); returns null if the node is first node in the branch, read-only ParentNode - pointer to the parent node, read-only MenuText - string to hold the menu text; if modified, fires MenuRedraw, unless UpdatingInProgress is true CanFocus - boolean PasswordProtected - boolean AllowValueEditMode - boolean ValueEditModeActive - boolean Value - byte Level - byte - stores the level number of the node, read-only Index - byte - stores the position of the node within the branch, read-only IsFocused - boolean, true if FocusedNode is this node ActiveMethod - assignable method that will be activated when needed An examples demonstrating the listing of the nodes in a branch and events firing must be provided.