xenadmin/XenAdmin/XenSearch/TreeNodeGroupAcceptor.cs

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using System;
using XenAdmin.Controls;

namespace XenAdmin.XenSearch
{
    internal class TreeNodeGroupAcceptor : IAcceptGroups
    {
        private readonly IHaveNodes parent;
        private readonly bool? needToBeExpanded;
        private int index;

        public TreeNodeGroupAcceptor(IHaveNodes parent, bool? needToBeExpanded)
        {   
            this.parent = parent;
            this.needToBeExpanded = needToBeExpanded;
        }

        public IAcceptGroups Add(Grouping grouping, Object group, int indent)
        {
            if (group == null)
                return null;

            VirtualTreeNode node = new VirtualTreeNode(group.ToString());
            node.Tag = group;
            parent.Nodes.Insert(index, node);
            index++;

            return new TreeNodeGroupAcceptor(node, null);
        }

        public void FinishedInThisGroup(bool defaultExpand)
        {
            if (needToBeExpanded.HasValue ? needToBeExpanded.Value : defaultExpand)
                parent.Expand();
            else
                parent.Collapse();
        }
    }
}