using System;

using System.Collections.ObjectModel;

using System.Collections.Generic;

using System.ComponentModel;

using System.Linq;

using System.Net;

 

namespace MS.SDKMSDNKeywordIndex

{

    public class TocNodeViewModel : TreeViewItemViewModel

    {

        readonly TocNode _tocNode;

        private HelpApiShim api = new HelpApiShim();

 

        public TocNodeViewModel(TocNode node)

            : base(null, true)

        {

            _tocNode = node;

        }

 

        public TocNodeViewModel(TocNode tocNode, TocNodeViewModel parentNode)

            : base(parentNode, true)

        {

            _tocNode = tocNode;

        }

 

        public string Title

        {

            get { return _tocNode.Title; }

        }

 

        public string Url

        {

            get { return _tocNode.Url; }

        }

 

        public string Id

        {

            get { return _tocNode.Id; }

        }

 

        protected override void LoadChildren()

        {

            if (_tocNode.hasChildren)

            {

                try

                {

                    foreach (TocNode node in api.GetTocNodes(_tocNode))

                    {

                        base.Children.Add(new TocNodeViewModel(node, this));

                    }

                }

                catch (WebException )

                {

 

                    //retart the agent, get a new API instance due to PID change

                    api = new HelpApiShim();

                    LoadChildren();

                }

            }

        }

    }

}