xenadmin/XenAdmin/Commands/Controls/AddSelectedHostToPoolToolStripMenuItem.cs

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 *     following disclaimer. 
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Forms;
using XenAdmin.Network;
using XenAdmin.Core;
using XenAPI;
using XenAdmin.Properties;


namespace XenAdmin.Commands
{
    internal class AddSelectedHostToPoolToolStripMenuItem : CommandToolStripMenuItem
    {
        public AddSelectedHostToPoolToolStripMenuItem()
            : base(new AddSelectedHostToPoolCommand(), false)
        {
            base.DropDownItems.Add(new ToolStripMenuItem());
        }

        public AddSelectedHostToPoolToolStripMenuItem(IMainWindow mainWindow, IEnumerable<SelectedItem> selection, bool inContextMenu)
            : base(new AddSelectedHostToPoolCommand(mainWindow, selection), inContextMenu)
        {
            base.DropDownItems.Add(new ToolStripMenuItem());
        }

        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public new Command Command
        {
            get
            {
                return base.Command;
            }
        }

        protected override void OnDropDownOpening(EventArgs e)
        {
            base.DropDownItems.Clear();

            SelectedItemCollection selection = Command.GetSelection();
            
            List<IXenConnection> connections = ConnectionsManager.XenConnectionsCopy;
            connections.Sort();

            foreach (IXenConnection connection in connections)
            {
                if (Helpers.GetPool(connection) != null)
                {
                    String poolName = Helpers.GetName(connection).EscapeAmpersands().Ellipsise(Helpers.DEFAULT_NAME_TRIM_LENGTH);
                    AddHostToPoolCommand cmd = new AddHostToPoolCommand(Command.MainWindowCommandInterface, selection.AsXenObjects<Host>(), Helpers.GetPool(connection), true);
                    base.DropDownItems.Add(new CommandToolStripMenuItem(cmd, poolName, Resources._000_PoolConnected_h32bit_16));
                }
            }

            if (base.DropDownItems.Count > 0)
                base.DropDownItems.Add(new ToolStripSeparator());

            base.DropDownItems.Add(new CommandToolStripMenuItem(new NewPoolCommand(Command.MainWindowCommandInterface, selection)));
        }

        private class AddSelectedHostToPoolCommand : Command
        {
            public AddSelectedHostToPoolCommand()
            {
            }

            public AddSelectedHostToPoolCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection)
                : base(mainWindow, selection)
            {
            }

            protected override bool CanExecuteCore(SelectedItemCollection selection)
            {
                return selection.AllItemsAre<Host>(CanExecute);
            }

            private bool CanExecute(Host host)
            {
                return host != null && host.Connection != null && host.Connection.IsConnected && Helpers.GetPool(host.Connection) == null && !host.RestrictPooling;
            }

            public override string MenuText
            {
                get
                {
                    foreach (SelectedItem item in GetSelection())
                    {
                        Host host = item.XenObject as Host;

                        if (host != null && host.Connection != null && host.Connection.IsConnected && Helpers.GetPool(host.Connection) == null && host.RestrictPooling)
                        {
                            return Messages.HOST_MENU_ADD_TO_POOL_LICENSE_RESTRICTION;
                        }
                    }
                    return Messages.HOST_MENU_ADD_TO_POOL;
                }
            }

            public override string ContextMenuText
            {
                get
                {
                    return Messages.HOST_MENU_ADD_TO_POOL_CONTEXT_MENU;
                }
            }
        }
    }
}